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LexBench-Headless-Browser / data /l2.web_platform.jsonl
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gehuageyan
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{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dA_e_before_content", "input": "::before generated content", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dA_e_before_content.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for ::before generated content. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dA_e_before_content.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: output prefixed 'LABEL:'; expected token NEW_ARRIVAL inside ::before content string.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dA_e_before_content\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dA_e_before_content.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dA_e_before_content\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"::before generated content\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dA_e_color_gate", "input": "getComputedStyle:color cascade", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dA_e_color_gate.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for getComputedStyle:color cascade. The scripted CDP driver observes page output from the self-hosted fixture `/fixtures/l2_round3/dA_e_color_gate.html`, and the server-side grader compares it with the expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dA_e_color_gate\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dA_e_color_gate.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dA_e_color_gate\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"getComputedStyle:color cascade\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dA_e_fontsize_gate", "input": "getComputedStyle:font-size cascade", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dA_e_fontsize_gate.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for getComputedStyle:font-size cascade. The scripted CDP driver observes page output from the self-hosted fixture `/fixtures/l2_round3/dA_e_fontsize_gate.html`, and the server-side grader compares it with the expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dA_e_fontsize_gate\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dA_e_fontsize_gate.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dA_e_fontsize_gate\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"getComputedStyle:font-size cascade\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dA_e_target_reveal", "input": ":target pseudo-class reveal", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dA_e_target_reveal.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for :target pseudo-class reveal. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dA_e_target_reveal.html#sec`, and the server-side grader compares it with the checked-in expected answer. Current probe details: must open with #sec hash; #out shows 'SHOWN:COUPON_CODE_SAVE20' when :target matches, else 'HIDDEN'.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dA_e_target_reveal\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dA_e_target_reveal.html#sec\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dA_e_target_reveal\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":target pseudo-class reveal\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dA_h_color_table", "input": "per-row getComputedStyle:color filtering + aggregate", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dA_h_color_table.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for per-row getComputedStyle:color filtering + aggregate. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dA_h_color_table.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: output 'INSTOCK:Alpha,Gamma,Epsilon'.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dA_h_color_table\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dA_h_color_table.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dA_h_color_table\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"per-row getComputedStyle:color filtering + aggregate\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dA_h_priced_list", "input": "computed color + font-size combined per-row classify", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dA_h_priced_list.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for computed color + font-size combined per-row classify. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dA_h_priced_list.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: output 'HOT:P1,P4'.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dA_h_priced_list\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dA_h_priced_list.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dA_h_priced_list\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"computed color + font-size combined per-row classify\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dA_h_tabs_target", "input": "multi :target tab walk + aggregate", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dA_h_tabs_target.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for multi :target tab walk + aggregate. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dA_h_tabs_target.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: requires clicking #l1,#l2,#l3 in order, waiting for each SPEC_x to appear in window.__seen; output 'SPECS:SPEC_A,SPEC_B,SPEC_C'.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"pre_clicks\": [\"#l1\", \"#l2\", \"#l3\"], \"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 300}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dA_h_tabs_target\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dA_h_tabs_target.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dA_h_tabs_target\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"multi :target tab walk + aggregate\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dA_h_var_cascade", "input": "nested var() cascade override + async", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dA_h_var_cascade.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for nested var() cascade override + async. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dA_h_var_cascade.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: async: setTimeout 350ms before #out is written.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 6000, \"wait_ms\": 400}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dA_h_var_cascade\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dA_h_var_cascade.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dA_h_var_cascade\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"nested var() cascade override + async\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dA_m_after_async", "input": "::after content on async-injected node", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dA_m_after_async.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for ::after content on async-injected node. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dA_m_after_async.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: async: chip injected via setTimeout 400ms; output 'STATUS:...VERIFIED...'.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 6000, \"wait_ms\": 400}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dA_m_after_async\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dA_m_after_async.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dA_m_after_async\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"::after content on async-injected node\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dA_m_bgcolor_toggle", "input": "getComputedStyle:background-color after class toggle", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dA_m_bgcolor_toggle.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for getComputedStyle:background-color after class toggle. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dA_m_bgcolor_toggle.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: requires clicking #go; wait until computed backgroundColor of #cell is rgb(200, 30, 40); MutationObserver writes #out.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"pre_clicks\": [\"#go\"], \"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 300}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dA_m_bgcolor_toggle\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dA_m_bgcolor_toggle.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dA_m_bgcolor_toggle\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"getComputedStyle:background-color after class toggle\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dA_m_target_click", "input": ":target reveal via in-page anchor click", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dA_m_target_click.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for :target reveal via in-page anchor click. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dA_m_target_click.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: requires clicking #lnk (sets #shipping hash); wait until #shipping display:block.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"pre_clicks\": [\"#lnk\"], \"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 300}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dA_m_target_click\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dA_m_target_click.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dA_m_target_click\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":target reveal via in-page anchor click\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dA_m_var_theme", "input": "CSS var() resolution after theme class swap", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dA_m_var_theme.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for CSS var() resolution after theme class swap. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dA_m_var_theme.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: requires clicking #go; wait until computed color of #p is rgb(90, 200, 255).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"pre_clicks\": [\"#go\"], \"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 300}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dA_m_var_theme\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dA_m_var_theme.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dA_m_var_theme\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CSS var() resolution after theme class swap\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dB_e_idb_record", "input": "IndexedDB single keyPath record", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dB_e_idb_record.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for IndexedDB single keyPath record. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dB_e_idb_record.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: IDB async; #out initial text 'PENDING'; output 'USER:PROFILE_NAME_ERIC'.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dB_e_idb_record\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dB_e_idb_record.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dB_e_idb_record\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB single keyPath record\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dB_e_idb_two", "input": "IndexedDB two records read-back", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dB_e_idb_two.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for IndexedDB two records read-back. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dB_e_idb_two.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: IDB async; PENDING pattern; output 'CART:CART_ITEM_BOOK,CART_ITEM_PEN'.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dB_e_idb_two\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dB_e_idb_two.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dB_e_idb_two\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB two records read-back\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dB_h_idb_cursor", "input": "IndexedDB cursor iterate + aggregate sum", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dB_h_idb_cursor.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for IndexedDB cursor iterate + aggregate sum. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dB_h_idb_cursor.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: IDB async; PENDING pattern; output 'LARGE_ORDERS=3_TOTAL=95'.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dB_h_idb_cursor\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dB_h_idb_cursor.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dB_h_idb_cursor\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB cursor iterate + aggregate sum\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dB_h_idb_upgrade", "input": "IndexedDB version upgrade migration + index", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dB_h_idb_upgrade.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for IndexedDB version upgrade migration + index. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dB_h_idb_upgrade.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: IDB async two-phase (v1 write, close, v2 upgrade+index); PENDING pattern; timeout 9s in plan; output 'VIP_AFTER_UPGRADE=2:ANN,CAM'.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dB_h_idb_upgrade\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dB_h_idb_upgrade.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dB_h_idb_upgrade\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB version upgrade migration + index\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dB_m_idb_getall", "input": "IndexedDB autoIncrement + getAll aggregate", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dB_m_idb_getall.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for IndexedDB autoIncrement + getAll aggregate. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dB_m_idb_getall.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: IDB async; PENDING pattern; output 'ORDERS=5:ORD_A,...,ORD_E'.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dB_m_idb_getall\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dB_m_idb_getall.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dB_m_idb_getall\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB autoIncrement + getAll aggregate\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dB_m_idb_index", "input": "IndexedDB index query", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dB_m_idb_index.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for IndexedDB index query. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dB_m_idb_index.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: IDB async; PENDING pattern; output 'BOOKS=2:T1,BOOKMATCH_T3'.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dB_m_idb_index\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dB_m_idb_index.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dB_m_idb_index\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB index query\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dC_e_adopted_color", "input": "adoptedStyleSheets constructable stylesheet", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dC_e_adopted_color.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for adoptedStyleSheets constructable stylesheet. The scripted CDP driver observes page output from the self-hosted fixture `/fixtures/l2_round3/dC_e_adopted_color.html`, and the server-side grader compares it with the expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.constructable_stylesheets\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dC_e_adopted_color\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dC_e_adopted_color.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dC_e_adopted_color\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"adoptedStyleSheets constructable stylesheet\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dC_e_has_child", "input": ":has() direct-child selector", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dC_e_has_child.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for :has() direct-child selector. The scripted CDP driver observes page output from the self-hosted fixture `/fixtures/l2_round3/dC_e_has_child.html`, and the server-side grader compares it with the expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.has\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dC_e_has_child\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dC_e_has_child.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dC_e_has_child\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":has() direct-child selector\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dC_e_nth_of", "input": ":nth-child(n of S) selector", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dC_e_nth_of.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for :nth-child(n of S) selector. The scripted CDP driver observes page output from the self-hosted fixture `/fixtures/l2_round3/dC_e_nth_of.html`, and the server-side grader compares it with the expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.nth_child\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dC_e_nth_of\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dC_e_nth_of.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dC_e_nth_of\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":nth-child(n of S) selector\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dC_h_has_compound", "input": "compound :has():has() multi-condition aggregate", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dC_h_has_compound.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for compound :has():has() multi-condition aggregate. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dC_h_has_compound.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: output 'BOTH:R2,R4'.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.has\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dC_h_has_compound\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dC_h_has_compound.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dC_h_has_compound\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"compound :has():has() multi-condition aggregate\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dC_h_has_nth_combo", "input": ":has() + :nth-child(of) combined + interaction", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dC_h_has_nth_combo.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for :has() + :nth-child(of) combined + interaction. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dC_h_has_nth_combo.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: requires clicking #go to build list; output 'PROMO=L2,L3,L5|THIRD=L5'.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"pre_clicks\": [\"#go\"], \"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 300}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.has\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dC_h_has_nth_combo\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dC_h_has_nth_combo.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dC_h_has_nth_combo\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":has() + :nth-child(of) combined + interaction\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dC_m_adopted_async", "input": "adoptedStyleSheets applied after async", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dC_m_adopted_async.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for adoptedStyleSheets applied after async. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dC_m_adopted_async.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: async: adoptedStyleSheets applied via setTimeout 400ms.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 6000, \"wait_ms\": 400}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.constructable_stylesheets\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dC_m_adopted_async\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dC_m_adopted_async.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dC_m_adopted_async\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"adoptedStyleSheets applied after async\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dC_m_has_child_inject", "input": ":has(> child) on async-injected items", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dC_m_has_child_inject.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for :has(> child) on async-injected items. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/dC_m_has_child_inject.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: requires clicking #go to inject items; MutationObserver writes #out.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"pre_clicks\": [\"#go\"], \"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 300}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.has\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dC_m_has_child_inject\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dC_m_has_child_inject.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dC_m_has_child_inject\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":has(> child) on async-injected items\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_dC_m_nthlast_of", "input": ":nth-last-child(n of S) selector", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_dC_m_nthlast_of.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for :nth-last-child(n of S) selector. The scripted CDP driver observes page output from the self-hosted fixture `/fixtures/l2_round3/dC_m_nthlast_of.html`, and the server-side grader compares it with the expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.nth_child\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dC_m_nthlast_of\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/dC_m_nthlast_of.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r3_dC_m_nthlast_of\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":nth-last-child(n of S) selector\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_fv_attr_content", "input": "CSS attr() in generated content", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_fv_attr_content.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for CSS attr() in generated content. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/fv_attr_content.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: output 'C:<::before content>'; pass token ATTR_LABEL_X.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.generated_content\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"fv_attr_content\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/fv_attr_content.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.defect_repro\", \"purpose.diagnostic\", \"version.v0_1\"], \"task_id\": \"r3_fv_attr_content\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CSS attr() in generated content\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_fv_cache_api", "input": "CacheStorage API", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_fv_cache_api.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for CacheStorage API. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/fv_cache_api.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: async Promise chain; #out initial 'PENDING'; pass token CACHE_OK.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.cache_api\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"fv_cache_api\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/fv_cache_api.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.defect_repro\", \"purpose.diagnostic\", \"version.v0_1\"], \"task_id\": \"r3_fv_cache_api\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CacheStorage API\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_fv_checkvisibility", "input": "Element.checkVisibility()", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_fv_checkvisibility.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Element.checkVisibility(). The driver reads output from the self-hosted fixture `/fixtures/l2_round3/fv_checkvisibility.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: pass token CHECKVIS_OK.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"fv_checkvisibility\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/fv_checkvisibility.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.defect_repro\", \"purpose.diagnostic\", \"version.v0_1\"], \"task_id\": \"r3_fv_checkvisibility\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Element.checkVisibility()\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_fv_clipboard_api", "input": "Clipboard API", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_fv_clipboard_api.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Clipboard API. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/fv_clipboard_api.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: pass token CLIPBOARD_OK.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.clipboard\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"fv_clipboard_api\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/fv_clipboard_api.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.defect_repro\", \"purpose.diagnostic\", \"version.v0_1\"], \"task_id\": \"r3_fv_clipboard_api\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Clipboard API\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_fv_computedstylemap", "input": "CSS Typed OM (computedStyleMap)", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_fv_computedstylemap.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for CSS Typed OM (computedStyleMap). The driver reads output from the self-hosted fixture `/fixtures/l2_round3/fv_computedstylemap.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: pass token CSM:21px.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.typed_om\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"fv_computedstylemap\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/fv_computedstylemap.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.defect_repro\", \"purpose.diagnostic\", \"version.v0_1\"], \"task_id\": \"r3_fv_computedstylemap\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CSS Typed OM (computedStyleMap)\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_fv_css_registerproperty", "input": "CSS Houdini registerProperty", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_fv_css_registerproperty.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for CSS Houdini registerProperty. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/fv_css_registerproperty.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: pass token REGPROP_OK.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.register_property\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"fv_css_registerproperty\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/fv_css_registerproperty.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.defect_repro\", \"purpose.diagnostic\", \"version.v0_1\"], \"task_id\": \"r3_fv_css_registerproperty\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CSS Houdini registerProperty\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_fv_css_supports", "input": "CSS.supports()", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_fv_css_supports.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for CSS.supports(). The driver reads output from the self-hosted fixture `/fixtures/l2_round3/fv_css_supports.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: pass token SUPPORTS_GRID.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.supports\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"fv_css_supports\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/fv_css_supports.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.defect_repro\", \"purpose.diagnostic\", \"version.v0_1\"], \"task_id\": \"r3_fv_css_supports\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CSS.supports()\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_fv_cssaware_innertext", "input": "CSS-aware innerText (display:none exclusion)", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_fv_cssaware_innertext.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for CSS-aware innerText (display:none exclusion). The driver reads output from the self-hosted fixture `/fixtures/l2_round3/fv_cssaware_innertext.html`, and the server-side grader compares it with the checked-in expected answer. The driver grades `#card.innerText` directly and requires the hidden `DRAFT_LEAK_500` text to be absent; `#out` mirrors the same visible text.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"innerText\", \"selector\": \"#card\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.text_extraction\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"fv_cssaware_innertext\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/fv_cssaware_innertext.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.defect_repro\", \"purpose.diagnostic\", \"version.v0_1\"], \"task_id\": \"r3_fv_cssaware_innertext\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CSS-aware innerText (display:none exclusion)\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_fv_geom_gbcr", "input": "getBoundingClientRect width (layout geometry)", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_fv_geom_gbcr.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for getBoundingClientRect width (layout geometry). The driver reads output from the self-hosted fixture `/fixtures/l2_round3/fv_geom_gbcr.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: pass token GBCR_W_OK.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.geometry\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"fv_geom_gbcr\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/fv_geom_gbcr.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.defect_repro\", \"purpose.diagnostic\", \"version.v0_1\"], \"task_id\": \"r3_fv_geom_gbcr\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"getBoundingClientRect width (layout geometry)\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_fv_geom_offsetwidth", "input": "offsetWidth (layout geometry)", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_fv_geom_offsetwidth.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for offsetWidth (layout geometry). The driver reads output from the self-hosted fixture `/fixtures/l2_round3/fv_geom_offsetwidth.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: pass token OFFSET_W_OK.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.geometry\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"fv_geom_offsetwidth\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/fv_geom_offsetwidth.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.defect_repro\", \"purpose.diagnostic\", \"version.v0_1\"], \"task_id\": \"r3_fv_geom_offsetwidth\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"offsetWidth (layout geometry)\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_fv_geom_scrollheight", "input": "scrollHeight layout geometry", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_fv_geom_scrollheight.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for scrollHeight layout geometry. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/fv_geom_scrollheight.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: pass token SCROLLH_OK.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.geometry\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"fv_geom_scrollheight\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/fv_geom_scrollheight.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.defect_repro\", \"purpose.diagnostic\", \"version.v0_1\"], \"task_id\": \"r3_fv_geom_scrollheight\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"scrollHeight layout geometry\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_fv_view_transitions", "input": "View Transitions API", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_fv_view_transitions.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for View Transitions API. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/fv_view_transitions.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: pass token VIEWTRANS_OK.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.view_transitions\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"fv_view_transitions\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/fv_view_transitions.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.defect_repro\", \"purpose.diagnostic\", \"version.v0_1\"], \"task_id\": \"r3_fv_view_transitions\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"View Transitions API\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_fv_web_animations", "input": "Web Animations (Element.animate/getAnimations)", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_fv_web_animations.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Web Animations (Element.animate/getAnimations). The driver reads output from the self-hosted fixture `/fixtures/l2_round3/fv_web_animations.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: pass token ANIM_OK.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.animations\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"fv_web_animations\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/fv_web_animations.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.defect_repro\", \"purpose.diagnostic\", \"version.v0_1\"], \"task_id\": \"r3_fv_web_animations\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Web Animations (Element.animate/getAnimations)\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_g_dialog", "input": "<dialog>.showModal()", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_g_dialog.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for <dialog>.showModal(). The driver reads output from the self-hosted fixture `/fixtures/l2_round3/g_dialog.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.html.dialog\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"g_dialog\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/g_dialog.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_g_dialog\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"<dialog>.showModal()\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_g_durationformat", "input": "Intl.DurationFormat", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_g_durationformat.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Intl.DurationFormat. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/g_durationformat.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.intl.duration_format\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"g_durationformat\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/g_durationformat.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_g_durationformat\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Intl.DurationFormat\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_g_io", "input": "IntersectionObserver callback", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_g_io.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for IntersectionObserver callback. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/g_io.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: #out starts 'PENDING'; IntersectionObserver flips to IO_FIRED (or IO_NEVER after 1.5s).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.observer.intersection\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"g_io\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/g_io.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_g_io\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IntersectionObserver callback\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_g_segmenter", "input": "Intl.Segmenter", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_g_segmenter.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Intl.Segmenter. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/g_segmenter.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.intl.segmenter\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"g_segmenter\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/g_segmenter.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_g_segmenter\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Intl.Segmenter\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_a11_cssaware_extract", "input": "CSS-aware extraction via getComputedStyle(display) on simple class rule", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_a11_cssaware_extract.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for CSS-aware extraction via getComputedStyle(display) on simple class rule. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_a11_cssaware_extract.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.text_extraction\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_a11_cssaware_extract\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_a11_cssaware_extract.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_a11_cssaware_extract\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CSS-aware extraction via getComputedStyle(display) on simple class rule\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_a3_checked_reveal", "input": "CSS :checked sibling-combinator reveal", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_a3_checked_reveal.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for CSS :checked sibling-combinator reveal. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_a3_checked_reveal.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: no #out and no JS; answer #c 'ANSWER_CHECKED_A3' revealed purely by CSS :checked ~ sibling rule.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#c\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.forms.checkbox\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_a3_checked_reveal\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_a3_checked_reveal.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_a3_checked_reveal\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CSS :checked sibling-combinator reveal\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_b1_localstorage", "input": "localStorage get/set", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_b1_localstorage.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for localStorage get/set. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_b1_localstorage.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.local_storage\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_b1_localstorage\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_b1_localstorage.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_b1_localstorage\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"localStorage get/set\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_b2_sessionstorage", "input": "sessionStorage get/set", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_b2_sessionstorage.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for sessionStorage get/set. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_b2_sessionstorage.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.session_storage\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_b2_sessionstorage\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_b2_sessionstorage.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_b2_sessionstorage\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"sessionStorage get/set\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_b3_cookie", "input": "document.cookie read/write", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_b3_cookie.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for document.cookie read/write. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_b3_cookie.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.cookies\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_b3_cookie\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_b3_cookie.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_b3_cookie\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"document.cookie read/write\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c11_domparser", "input": "DOMParser.parseFromString", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c11_domparser.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for DOMParser.parseFromString. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c11_domparser.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.dom_parser\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c11_domparser\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c11_domparser.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c11_domparser\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"DOMParser.parseFromString\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c12_treewalker", "input": "document.createTreeWalker", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c12_treewalker.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for document.createTreeWalker. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c12_treewalker.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.traversal\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c12_treewalker\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c12_treewalker.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c12_treewalker\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"document.createTreeWalker\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c13_intl", "input": "Intl.NumberFormat", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c13_intl.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Intl.NumberFormat. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c13_intl.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.intl\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c13_intl\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c13_intl.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c13_intl\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Intl.NumberFormat\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c14_crypto_uuid", "input": "crypto.randomUUID", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c14_crypto_uuid.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for crypto.randomUUID. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c14_crypto_uuid.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.crypto.random_uuid\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c14_crypto_uuid\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c14_crypto_uuid.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c14_crypto_uuid\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"crypto.randomUUID\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c17_textencoder", "input": "TextEncoder/TextDecoder", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c17_textencoder.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for TextEncoder/TextDecoder. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c17_textencoder.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.encoding.text_encoder\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c17_textencoder\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c17_textencoder.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c17_textencoder\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"TextEncoder/TextDecoder\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c18_range_fragment", "input": "Range.cloneContents", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c18_range_fragment.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Range.cloneContents. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c18_range_fragment.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.range\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c18_range_fragment\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c18_range_fragment.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c18_range_fragment\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Range.cloneContents\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c19_ci_attr", "input": "case-insensitive attribute selector [a=v i]", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c19_ci_attr.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for case-insensitive attribute selector [a=v i]. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c19_ci_attr.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.attribute_case_insensitive\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c19_ci_attr\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c19_ci_attr.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c19_ci_attr\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"case-insensitive attribute selector [a=v i]\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c20_not_has", "input": ":not(:has()) selector", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c20_not_has.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for :not(:has()) selector. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c20_not_has.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.has\", \"web.css.selectors.not\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c20_not_has\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c20_not_has.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c20_not_has\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":not(:has()) selector\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c21_matches_has", "input": "Element.matches(:has())", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c21_matches_has.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Element.matches(:has()). The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c21_matches_has.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.has\", \"web.dom.matches\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c21_matches_has\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c21_matches_has.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c21_matches_has\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Element.matches(:has())\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c23_scope_sel", "input": ":scope selector", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c23_scope_sel.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for :scope selector. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c23_scope_sel.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.scope\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c23_scope_sel\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c23_scope_sel.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c23_scope_sel\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":scope selector\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c2_template_slot", "input": "<template>.content clone", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c2_template_slot.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for <template>.content clone. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c2_template_slot.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: no #out; template clone appended into #mount.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#mount\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.components.template_slot\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c2_template_slot\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c2_template_slot.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c2_template_slot\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"<template>.content clone\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c4_structuredclone", "input": "structuredClone()", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c4_structuredclone.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for structuredClone(). The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c4_structuredclone.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.structured_clone\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c4_structuredclone\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c4_structuredclone.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c4_structuredclone\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"structuredClone()\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c5_customelements", "input": "customElements.define + upgrade", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c5_customelements.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for customElements.define + upgrade. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c5_customelements.html`, and the server-side grader compares it with the checked-in expected answer. Current probe details: no #out; custom element <x-card id='card'> textContent becomes CUSTOM_EL_C5.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#card\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.components.custom_elements\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c5_customelements\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c5_customelements.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c5_customelements\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"customElements.define + upgrade\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c6_cssom_rules", "input": "CSSOM styleSheets[].cssRules enumeration", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c6_cssom_rules.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for CSSOM styleSheets[].cssRules enumeration. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c6_cssom_rules.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cssom\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c6_cssom_rules\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c6_cssom_rules.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c6_cssom_rules\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CSSOM styleSheets[].cssRules enumeration\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c7_is_where", "input": ":is()/:where() selector", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c7_is_where.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for :is()/:where() selector. The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c7_is_where.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.is_where\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c7_is_where\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c7_is_where.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c7_is_where\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":is()/:where() selector\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r3_probe_c8_matchmedia", "input": "matchMedia()", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r3_probe_c8_matchmedia.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for matchMedia(). The driver reads output from the self-hosted fixture `/fixtures/l2_round3/probe_c8_matchmedia.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.media_queries\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c8_matchmedia\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round3/probe_c8_matchmedia.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"purpose.diagnostic\", \"purpose.regression_parity\", \"version.v0_1\"], \"task_id\": \"r3_probe_c8_matchmedia\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"matchMedia()\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r4_q01_stock_list", "input": "Computed-style stock filtering", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r4_q01_stock_list.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Computed-style stock filtering. The driver reads output from the self-hosted fixture `/fixtures/l2_round4/stock_list.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#answer\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 400}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\"], \"grader\": {\"checks\": [\"answer_contains_all_keywords\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"human_query\": \"这个「今日特价」页面里,哪些商品现在是有货的?把有货的商品名称和价格列给我。\", \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"q01_stock_list\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round4/stock_list.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r4_q01_stock_list\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Computed-style stock filtering\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r4_q02_target_section", "input": ":target version summary", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r4_q02_target_section.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for :target version summary. The driver reads output from the self-hosted fixture `/fixtures/l2_round4/target_section.html#v2`, and the server-side grader compares it with the checked-in expected answer. The fixture opens with the `#v2` fragment, recomputes the target summary on page load, and the driver grades `#summary`.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#summary\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 400}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\"], \"grader\": {\"checks\": [\"answer_contains_all_keywords\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"human_query\": \"打开这个文档并定位到 v2 这一节,告诉我这一节标注的「适用版本」是什么。\", \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"q02_target_section\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round4/target_section.html#v2\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r4_q02_target_section\", \"task_version\": 2, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":target version summary\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r4_q03_pricing_var", "input": "CSS-variable pricing summary", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r4_q03_pricing_var.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for CSS-variable pricing summary. The driver reads output from the self-hosted fixture `/fixtures/l2_round4/pricing_var.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#answer\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 400}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\"], \"grader\": {\"checks\": [\"answer_contains_all_keywords\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"human_query\": \"这个套餐页里「专业版」的最终月费是多少钱?\", \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"q03_pricing_var\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round4/pricing_var.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r4_q03_pricing_var\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CSS-variable pricing summary\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r4_q04_status_dashboard", "input": "Computed-style status dashboard", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r4_q04_status_dashboard.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Computed-style status dashboard. The driver reads output from the self-hosted fixture `/fixtures/l2_round4/status_dashboard.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#answer\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 400}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade\"], \"grader\": {\"checks\": [\"answer_contains_all_keywords\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"human_query\": \"这个服务状态面板上,现在有哪些服务处于「故障」状态?\", \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"q04_status_dashboard\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round4/status_dashboard.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r4_q04_status_dashboard\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Computed-style status dashboard\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r4_q05_reader_idb", "input": "IndexedDB reader list", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r4_q05_reader_idb.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for IndexedDB reader list. The driver reads output from the self-hosted fixture `/fixtures/l2_round4/reader_idb.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#answer\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 400}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb\"], \"grader\": {\"checks\": [\"answer_contains_all_keywords\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"human_query\": \"这个收藏夹应用里存了哪几篇文章?给我标题列表。\", \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"q05_reader_idb\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round4/reader_idb.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r4_q05_reader_idb\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB reader list\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r4_q06_notes_idb", "input": "IndexedDB notes lookup", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r4_q06_notes_idb.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for IndexedDB notes lookup. The driver reads output from the self-hosted fixture `/fixtures/l2_round4/notes_idb.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#answer\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 400}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb\"], \"grader\": {\"checks\": [\"answer_contains_all_keywords\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"human_query\": \"在这个笔记应用里,找到标签是「报销」的那条笔记,把里面的内容念给我听。\", \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"q06_notes_idb\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round4/notes_idb.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r4_q06_notes_idb\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB notes lookup\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r4_q07_cart_idb", "input": "IndexedDB cart total", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r4_q07_cart_idb.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for IndexedDB cart total. The driver reads output from the self-hosted fixture `/fixtures/l2_round4/cart_idb.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#answer\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 400}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb\"], \"grader\": {\"checks\": [\"answer_contains_all_keywords\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"human_query\": \"这个购物车应用里现在一共有几件商品,合计金额是多少?\", \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"q07_cart_idb\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round4/cart_idb.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r4_q07_cart_idb\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB cart total\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r4_q08_sale_has", "input": ":has() sale summary", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r4_q08_sale_has.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for :has() sale summary. The driver reads output from the self-hosted fixture `/fixtures/l2_round4/sale_has.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#answer\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 400}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.has\"], \"grader\": {\"checks\": [\"answer_contains_all_keywords\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"human_query\": \"这个商品列表里,现在哪些商品在促销中?列出促销商品的名字。\", \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"q08_sale_has\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round4/sale_has.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r4_q08_sale_has\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":has() sale summary\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r4_q09_widget_adopted", "input": "adoptedStyleSheets widget state", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r4_q09_widget_adopted.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for adoptedStyleSheets widget state. The driver reads output from the self-hosted fixture `/fixtures/l2_round4/widget_adopted.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#answer\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 400}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.constructable_stylesheets\", \"web.components.shadow_dom\"], \"grader\": {\"checks\": [\"answer_contains_all_keywords\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"human_query\": \"这个仪表盘组件当前显示的读数和运行状态分别是什么?\", \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"q09_widget_adopted\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round4/widget_adopted.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r4_q09_widget_adopted\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"adoptedStyleSheets widget state\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "r4_q10_leaderboard_nth", "input": ":nth-child(of S) leaderboard", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/r4_q10_leaderboard_nth.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for :nth-child(of S) leaderboard. The driver reads output from the self-hosted fixture `/fixtures/l2_round4/leaderboard_nth.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#answer\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 8000, \"wait_ms\": 400}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.nth_child\"], \"grader\": {\"checks\": [\"answer_contains_all_keywords\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"human_query\": \"这个排行榜的前三名分别是谁?各自拿的是金/银/铜哪个奖牌?\", \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"q10_leaderboard_nth\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/l2_round4/leaderboard_nth.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"r4_q10_leaderboard_nth\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":nth-child(of S) leaderboard\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "storage_indexeddb_inventory_001", "input": "Read seeded inventory from IndexedDB", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/storage_indexeddb_inventory_001.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for read seeded inventory from IndexedDB. The scripted CDP driver observes page output from the self-hosted fixture `/storage/indexeddb_inventory?seed={seed}&session={session}`, and the server-side grader compares it with the expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/storage_indexeddb_inventory_001.js\"}, \"features\": [\"web.storage.indexeddb\", \"cdp.runtime.evaluate\"], \"grader\": {\"checks\": [\"answer_matches_seed\", \"indexeddb_write_observed\", \"indexeddb_read_observed\"], \"endpoint\": \"/__grade__/storage_indexeddb_inventory_001\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"storage_indexeddb_inventory\", \"kind\": \"self_hosted_fixture\", \"url\": \"/storage/indexeddb_inventory?seed={seed}&session={session}\"}, \"seed_policy\": {\"kind\": \"per_attempt\", \"params\": [\"sku\", \"inventory_count\"]}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"version.v0_1\"], \"task_id\": \"storage_indexeddb_inventory_001\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 60000, \"task_ms\": 45000}, \"title\": \"Read seeded inventory from IndexedDB\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_blob_value", "input": "IndexedDB Blob and ArrayBuffer value round-trip", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_blob_value.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB structured-clone storage of Blob and ArrayBuffer values round-tripped through IndexedDB. The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/blob_value`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.blob\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"blob_value\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/blob_value?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_blob_value\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB Blob and ArrayBuffer value round-trip\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_compound_key", "input": "IndexedDB compound key path ordering and lookup", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_compound_key.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB compound keyPath ['region','id']: tuple ordering and get([region,id]) retrieval. The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/compound_key`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.compound_key\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"compound_key\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/compound_key?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_compound_key\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB compound key path ordering and lookup\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_cursor_advance", "input": "IndexedDB cursor advance(n) skip semantics", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_cursor_advance.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB cursor.advance(n) skips records vs continue(): trace proves advance semantics. The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/cursor_advance`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.cursor.advance\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"cursor_advance\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/cursor_advance?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_cursor_advance\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB cursor advance(n) skip semantics\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_cursor_forward", "input": "IndexedDB openCursor forward continue traversal", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_cursor_forward.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB openCursor() default 'next' direction: ascending key traversal with continue(). The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/cursor_forward`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.cursor\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"cursor_forward\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/cursor_forward?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_cursor_forward\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB openCursor forward continue traversal\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_cursor_reverse", "input": "IndexedDB openCursor reverse (prev) traversal", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_cursor_reverse.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB openCursor(null,'prev'): descending key traversal proving direction handling. The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/cursor_reverse`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.cursor.direction\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"cursor_reverse\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/cursor_reverse?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_cursor_reverse\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB openCursor reverse (prev) traversal\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_getall_keys_count", "input": "IndexedDB getAll / getAllKeys / count semantics", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_getall_keys_count.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB getAll() values vs getAllKeys() keys vs count() tally distinguished in one probe. The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/getall_keys_count`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.get_all\", \"web.storage.indexeddb.get_all_keys\", \"web.storage.indexeddb.count\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"getall_keys_count\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/getall_keys_count?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_getall_keys_count\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB getAll / getAllKeys / count semantics\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_index_query", "input": "IndexedDB createIndex + index.getAll query", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_index_query.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB createIndex on a non-key property and query via index.getAll(key), returned in primary-key order. The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/index_query`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.index\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"index_query\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/index_query?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_index_query\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB createIndex + index.getAll query\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_index_range_count", "input": "IndexedDB index count over key range", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_index_range_count.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB index combined with IDBKeyRange and count(): count(lowerBound) tally + getAllKeys(bound) in index order. The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/index_range_count`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.index\", \"web.storage.indexeddb.count\", \"web.storage.indexeddb.key_range\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"index_range_count\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/index_range_count?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_index_range_count\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB index count over key range\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_keyrange_bound", "input": "IndexedDB IDBKeyRange.bound inclusive/exclusive boundaries", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_keyrange_bound.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB IDBKeyRange.bound inclusive vs exclusive (lowerOpen/upperOpen) boundary semantics. The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/keyrange_bound`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.key_range\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"keyrange_bound\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/keyrange_bound?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_keyrange_bound\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB IDBKeyRange.bound inclusive/exclusive boundaries\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_keyrange_only_upper", "input": "IndexedDB IDBKeyRange.only and upperBound exclusive", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_keyrange_only_upper.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB IDBKeyRange.only and upperBound inclusive vs exclusive upper-end semantics. The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/keyrange_only_upper`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.key_range\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"keyrange_only_upper\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/keyrange_only_upper?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_keyrange_only_upper\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB IDBKeyRange.only and upperBound exclusive\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_multientry_index", "input": "IndexedDB multiEntry index query", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_multientry_index.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB multiEntry index over array-valued property: each element is an independent index entry. The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/multientry_index`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.index.multi_entry\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"multientry_index\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/multientry_index?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_multientry_index\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB multiEntry index query\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_multistore_atomic", "input": "IndexedDB multi-store single-transaction atomicity", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_multistore_atomic.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB single transaction over two object stores is atomic: abort rolls back both stores together. The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/multistore_atomic`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.transaction.atomicity\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"multistore_atomic\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/multistore_atomic?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_multistore_atomic\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB multi-store single-transaction atomicity\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_nested_keypath", "input": "IndexedDB nested keyPath extraction", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_nested_keypath.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB nested keyPath 'meta.id': primary key extracted from a nested property path. The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/nested_keypath`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.keypath.nested\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"nested_keypath\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/nested_keypath?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_nested_keypath\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB nested keyPath extraction\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_txn_abort_rollback", "input": "IndexedDB transaction abort rollback", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_txn_abort_rollback.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB transaction abort() rolls back all writes: mutated + inserted rows both vanish. The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/txn_abort_rollback`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.transaction.abort\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"txn_abort_rollback\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/txn_abort_rollback?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_txn_abort_rollback\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB transaction abort rollback\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_idb_upgrade_migrate", "input": "IndexedDB onupgradeneeded version migration retains old store and adds new store", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_idb_upgrade_migrate.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for IndexedDB onupgradeneeded version migration (v1->v2): retain old store 'users', add new store 'orders', old data survives. The scripted CDP driver observes page output from the self-hosted fixture `/v2/idb/upgrade_migrate`, and the server-side grader compares it against the Chrome-baked expected answer. The answer is computed only by executing the IndexedDB operation (it is not present in the static resource); the DB name is isolated per attempt via the `db` query param.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.indexeddb.upgrade\", \"web.storage.indexeddb.version_change\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"upgrade_migrate\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/idb/upgrade_migrate?db={session}\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.indexeddb\", \"version.v0_2\"], \"task_id\": \"v2_idb_upgrade_migrate\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IndexedDB onupgradeneeded version migration retains old store and adds new store\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_g_dialog", "input": "<dialog>.showModal()", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_g_dialog.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for <dialog>.showModal(). The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/g_dialog.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.html.dialog\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"g_dialog\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/g_dialog.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_g_dialog\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"<dialog>.showModal()\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_g_durationformat", "input": "Intl.DurationFormat", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_g_durationformat.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Intl.DurationFormat. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/g_durationformat.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.intl.duration_format\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"g_durationformat\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/g_durationformat.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_g_durationformat\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Intl.DurationFormat\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_g_io", "input": "IntersectionObserver callback", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_g_io.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for IntersectionObserver callback. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/g_io.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"not_pending\", \"settle_timeout_ms\": 8000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.observer.intersection\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"g_io\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/g_io.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_g_io\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"IntersectionObserver callback\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_g_segmenter", "input": "Intl.Segmenter", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_g_segmenter.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Intl.Segmenter. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/g_segmenter.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.intl.segmenter\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"g_segmenter\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/g_segmenter.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_g_segmenter\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Intl.Segmenter\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_a11_cssaware_extract", "input": "CSS-aware extraction via getComputedStyle(display) on simple class rule", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_a11_cssaware_extract.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for CSS-aware extraction via getComputedStyle(display) on simple class rule. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_a11_cssaware_extract.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.text_extraction\", \"web.css.computed_style\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_a11_cssaware_extract\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_a11_cssaware_extract.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_a11_cssaware_extract\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CSS-aware extraction via getComputedStyle(display) on simple class rule\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_a3_checked_reveal", "input": "CSS :checked sibling-combinator reveal", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_a3_checked_reveal.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for CSS :checked sibling-combinator reveal. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_a3_checked_reveal.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"innerText\", \"selector\": \"body\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.checked_combinator\", \"web.css.rendered_visibility\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_a3_checked_reveal\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_a3_checked_reveal.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_a3_checked_reveal\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CSS :checked sibling-combinator reveal\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_b1_localstorage", "input": "localStorage get/set", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_b1_localstorage.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for localStorage get/set. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_b1_localstorage.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.local_storage\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_b1_localstorage\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_b1_localstorage.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_b1_localstorage\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"localStorage get/set\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_b2_sessionstorage", "input": "sessionStorage get/set", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_b2_sessionstorage.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for sessionStorage get/set. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_b2_sessionstorage.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.session_storage\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_b2_sessionstorage\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_b2_sessionstorage.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_b2_sessionstorage\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"sessionStorage get/set\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_b3_cookie", "input": "document.cookie read/write", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_b3_cookie.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for document.cookie read/write. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_b3_cookie.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.cookies\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_b3_cookie\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_b3_cookie.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_b3_cookie\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"document.cookie read/write\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c11_domparser", "input": "DOMParser.parseFromString", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c11_domparser.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for DOMParser.parseFromString. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c11_domparser.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.dom_parser\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c11_domparser\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c11_domparser.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c11_domparser\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"DOMParser.parseFromString\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c12_treewalker", "input": "document.createTreeWalker", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c12_treewalker.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for document.createTreeWalker. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c12_treewalker.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.traversal.tree_walker\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c12_treewalker\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c12_treewalker.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c12_treewalker\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"document.createTreeWalker\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c13_intl", "input": "Intl.NumberFormat", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c13_intl.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Intl.NumberFormat. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c13_intl.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.intl.number_format\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c13_intl\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c13_intl.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c13_intl\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Intl.NumberFormat\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c14_crypto_uuid", "input": "crypto.randomUUID", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c14_crypto_uuid.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for crypto.randomUUID. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c14_crypto_uuid.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.crypto.random_uuid\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c14_crypto_uuid\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c14_crypto_uuid.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c14_crypto_uuid\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"crypto.randomUUID\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c17_textencoder", "input": "TextEncoder/TextDecoder", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c17_textencoder.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for TextEncoder/TextDecoder. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c17_textencoder.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.encoding.text_encoder_decoder\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c17_textencoder\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c17_textencoder.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c17_textencoder\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"TextEncoder/TextDecoder\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c18_range_fragment", "input": "Range.cloneContents", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c18_range_fragment.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Range.cloneContents. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c18_range_fragment.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.range_clone_contents\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c18_range_fragment\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c18_range_fragment.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c18_range_fragment\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Range.cloneContents\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c19_ci_attr", "input": "case-insensitive attribute selector [a=v i]", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c19_ci_attr.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for case-insensitive attribute selector [a=v i]. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c19_ci_attr.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.attribute_case_insensitive\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c19_ci_attr\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c19_ci_attr.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c19_ci_attr\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"case-insensitive attribute selector [a=v i]\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c1_shadow", "input": "open Shadow DOM attach/read", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c1_shadow.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for open Shadow DOM attach/read. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c1_shadow.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.shadow_root.open\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c1_shadow\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c1_shadow.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c1_shadow\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"open Shadow DOM attach/read\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c20_not_has", "input": ":not(:has()) selector", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c20_not_has.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for :not(:has()) selector. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c20_not_has.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.not_has\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c20_not_has\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c20_not_has.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c20_not_has\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":not(:has()) selector\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c21_matches_has", "input": "Element.matches(:has())", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c21_matches_has.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for Element.matches(:has()). The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c21_matches_has.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.matches_has\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c21_matches_has\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c21_matches_has.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c21_matches_has\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Element.matches(:has())\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c23_scope_sel", "input": ":scope selector", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c23_scope_sel.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for :scope selector. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c23_scope_sel.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.scope\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c23_scope_sel\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c23_scope_sel.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c23_scope_sel\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":scope selector\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c2_template_slot", "input": "<template>.content clone", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c2_template_slot.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for <template>.content clone. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c2_template_slot.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#mount\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.components.template_slot\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c2_template_slot\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c2_template_slot.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c2_template_slot\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"<template>.content clone\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c4_structuredclone", "input": "structuredClone()", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c4_structuredclone.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for structuredClone(). The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c4_structuredclone.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.structured_clone\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c4_structuredclone\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c4_structuredclone.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c4_structuredclone\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"structuredClone()\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c5_customelements", "input": "customElements.define + upgrade", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c5_customelements.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for customElements.define + upgrade. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c5_customelements.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#card\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.components.custom_elements\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c5_customelements\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c5_customelements.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c5_customelements\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"customElements.define + upgrade\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c6_cssom_rules", "input": "CSSOM styleSheets[].cssRules enumeration", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c6_cssom_rules.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for CSSOM styleSheets[].cssRules enumeration. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c6_cssom_rules.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cssom.rules_enumeration\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c6_cssom_rules\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c6_cssom_rules.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c6_cssom_rules\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CSSOM styleSheets[].cssRules enumeration\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c7_is_where", "input": ":is()/:where() selector", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c7_is_where.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for :is()/:where() selector. The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c7_is_where.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.is_where\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c7_is_where\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c7_is_where.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c7_is_where\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":is()/:where() selector\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_leg_probe_c8_matchmedia", "input": "matchMedia()", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_leg_probe_c8_matchmedia.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web-platform semantics probe for matchMedia(). The driver reads output from the self-hosted fixture `/fixtures/v0_2/leg/probe_c8_matchmedia.html`, and the server-side grader compares it with the checked-in expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.media.match_media\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"probe_c8_matchmedia\", \"kind\": \"self_hosted_fixture\", \"url\": \"/fixtures/v0_2/leg/probe_c8_matchmedia.html\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.legacy\", \"version.v0_2\"], \"task_id\": \"v2_leg_probe_c8_matchmedia\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"matchMedia()\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_crypto_aesgcm_roundtrip", "input": "AES-GCM encrypt/decrypt roundtrip", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_crypto_aesgcm_roundtrip.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (WebCrypto): AES-GCM encrypt/decrypt roundtrip. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.crypto.aes_gcm\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_crypto_aesgcm_roundtrip\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/crypto?case=aesgcm_roundtrip\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_crypto_aesgcm_roundtrip\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"AES-GCM encrypt/decrypt roundtrip\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_crypto_digest_bytelength", "input": "SubtleCrypto SHA-256 digest byteLength is 32", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_crypto_digest_bytelength.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (WebCrypto): SubtleCrypto SHA-256 digest byteLength is 32. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.crypto.digest\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_crypto_digest_bytelength\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/crypto?case=digest_bytelength\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_crypto_digest_bytelength\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"SubtleCrypto SHA-256 digest byteLength is 32\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_crypto_getrandomvalues_shape", "input": "getRandomValues fills and returns same typed array", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_crypto_getrandomvalues_shape.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (WebCrypto): getRandomValues fills and returns same typed array. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.crypto.get_random_values\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_crypto_getrandomvalues_shape\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/crypto?case=getrandomvalues_shape\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_crypto_getrandomvalues_shape\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"getRandomValues fills and returns same typed array\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_crypto_hmac_roundtrip", "input": "HMAC-SHA256 sign then verify roundtrip", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_crypto_hmac_roundtrip.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (WebCrypto): HMAC-SHA256 sign then verify roundtrip. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.crypto.hmac\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_crypto_hmac_roundtrip\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/crypto?case=hmac_roundtrip\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_crypto_hmac_roundtrip\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"HMAC-SHA256 sign then verify roundtrip\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_crypto_hmac_tamper", "input": "HMAC-SHA256 verify rejects tampered mac", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_crypto_hmac_tamper.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (WebCrypto): HMAC-SHA256 verify rejects tampered mac. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.crypto.hmac\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_crypto_hmac_tamper\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/crypto?case=hmac_tamper\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_crypto_hmac_tamper\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"HMAC-SHA256 verify rejects tampered mac\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_crypto_sha1_abc", "input": "SubtleCrypto SHA-1 of 'abc'", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_crypto_sha1_abc.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (WebCrypto): SubtleCrypto SHA-1 of 'abc'. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.crypto.digest\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_crypto_sha1_abc\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/crypto?case=sha1_abc\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_crypto_sha1_abc\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"SubtleCrypto SHA-1 of 'abc'\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_crypto_sha256_abc", "input": "SubtleCrypto SHA-256 of 'abc'", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_crypto_sha256_abc.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (WebCrypto): SubtleCrypto SHA-256 of 'abc'. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.crypto.digest\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_crypto_sha256_abc\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/crypto?case=sha256_abc\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_crypto_sha256_abc\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"SubtleCrypto SHA-256 of 'abc'\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_crypto_sha256_empty", "input": "SubtleCrypto SHA-256 of empty input", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_crypto_sha256_empty.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (WebCrypto): SubtleCrypto SHA-256 of empty input. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.crypto.digest\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_crypto_sha256_empty\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/crypto?case=sha256_empty\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_crypto_sha256_empty\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"SubtleCrypto SHA-256 of empty input\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_crypto_sha384_abc", "input": "SubtleCrypto SHA-384 of 'abc'", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_crypto_sha384_abc.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (WebCrypto): SubtleCrypto SHA-384 of 'abc'. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.crypto.digest\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_crypto_sha384_abc\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/crypto?case=sha384_abc\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_crypto_sha384_abc\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"SubtleCrypto SHA-384 of 'abc'\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_crypto_sha512_abc", "input": "SubtleCrypto SHA-512 of 'abc'", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_crypto_sha512_abc.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (WebCrypto): SubtleCrypto SHA-512 of 'abc'. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.crypto.digest\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_crypto_sha512_abc\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/crypto?case=sha512_abc\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_crypto_sha512_abc\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"SubtleCrypto SHA-512 of 'abc'\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_css_at_property", "input": "@property at-rule initial-value resolution", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_css_at_property.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for @property at-rule registering a typed custom property whose var() resolves to its initial-value when unset. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/css_at_property`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.property.at_property\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"css_at_property\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/css_at_property\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_css_at_property\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"@property at-rule initial-value resolution\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_css_cascade_important", "input": "cascade !important overrides higher specificity", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_css_cascade_important.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for Cascade origin: a !important class declaration overriding a higher-specificity #id normal declaration. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/css_cascade_important`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.cascade.important\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"css_cascade_important\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/css_cascade_important\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_css_cascade_important\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"cascade !important overrides higher specificity\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_css_constructable", "input": "constructable stylesheet + shadow adoptedStyleSheets", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_css_constructable.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for A constructed CSSStyleSheet (replaceSync) applied via a shadow root's adoptedStyleSheets. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/css_constructable`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.constructable_stylesheets\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"css_constructable\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/css_constructable\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_css_constructable\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"constructable stylesheet + shadow adoptedStyleSheets\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_css_focus_within", "input": ":focus-within matches ancestor of focused element", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_css_focus_within.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for :focus-within matching a container after its descendant input is programmatically focused. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/css_focus_within`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.focus_within\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"css_focus_within\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/css_focus_within\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_css_focus_within\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":focus-within matches ancestor of focused element\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_css_has_forgiving", "input": ":has() with nested forgiving :is() child combinator", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_css_has_forgiving.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for :has(> :is(.a,.b)) relative child combinator with a nested forgiving selector list. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/css_has_forgiving`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.has_forgiving\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"css_has_forgiving\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/css_has_forgiving\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_css_has_forgiving\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":has() with nested forgiving :is() child combinator\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_css_is_specificity", "input": ":is() specificity equals its most specific argument", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_css_is_specificity.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for :is() taking the specificity of its most specific argument (:is(#id,.class) beats a bare .class rule). The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/css_is_specificity`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.is_specificity\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"css_is_specificity\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/css_is_specificity\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_css_is_specificity\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":is() specificity equals its most specific argument\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_css_nth_child_of", "input": ":nth-child(An+B of S) filtered structural match", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_css_nth_child_of.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for :nth-child(2n of .x) counting only the .x-filtered sibling subset (An+B of S syntax). The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/css_nth_child_of`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.nth_child_of\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"css_nth_child_of\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/css_nth_child_of\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_css_nth_child_of\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":nth-child(An+B of S) filtered structural match\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_css_property_inherits", "input": "registered property inherits:true vs false", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_css_property_inherits.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for Registered custom property inheritance: inherits:true flows to a child while inherits:false falls back to initialValue. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/css_property_inherits`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.property.inherits\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"css_property_inherits\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/css_property_inherits\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_css_property_inherits\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"registered property inherits:true vs false\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_css_register_syntax", "input": "CSS.registerProperty <length> typed validation + initial fallback", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_css_register_syntax.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for CSS.registerProperty with syntax '<length>' accepting a valid length but falling back to initialValue for an invalid value. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/css_register_syntax`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.property.register_syntax\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"css_register_syntax\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/css_register_syntax\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_css_register_syntax\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CSS.registerProperty <length> typed validation + initial fallback\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_css_where_zero", "input": ":where() contributes zero specificity", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_css_where_zero.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for :where() contributing zero specificity so a plain type selector overrides :where(#id,.class). The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/css_where_zero`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.css.selectors.where\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"css_where_zero\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/css_where_zero\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_css_where_zero\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \":where() contributes zero specificity\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_dom_abortsignal", "input": "AbortSignal removes listener on abort; aborted/reason state", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_dom_abortsignal.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for AbortController/AbortSignal: a {signal} listener is removed on abort(); signal.aborted and signal.reason reflect the abort. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/dom_abortsignal`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.abort_signal\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dom_abortsignal\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/dom_abortsignal\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_dom_abortsignal\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"AbortSignal removes listener on abort; aborted/reason state\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_dom_adoptnode", "input": "adoptNode / importNode cross-document ownership", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_dom_adoptnode.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for Document.adoptNode moving a node's ownerDocument (removing it from the source) vs importNode copying it. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/dom_adoptnode`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.adopt_node\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dom_adoptnode\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/dom_adoptnode\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_dom_adoptnode\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"adoptNode / importNode cross-document ownership\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_dom_clonenode", "input": "cloneNode deep vs shallow semantics", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_dom_clonenode.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for Node.cloneNode(true) deep copy vs cloneNode(false) shallow copy, attribute copying, and disconnected result. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/dom_clonenode`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.clone_node\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dom_clonenode\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/dom_clonenode\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_dom_clonenode\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"cloneNode deep vs shallow semantics\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_dom_domparser", "input": "DOMParser XML parsererror vs HTML tolerance", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_dom_domparser.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for DOMParser producing a parsererror element for malformed application/xml while text/html auto-corrects without error. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/dom_domparser`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.dom_parser\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dom_domparser\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/dom_domparser\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_dom_domparser\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"DOMParser XML parsererror vs HTML tolerance\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_dom_event_order", "input": "CustomEvent capture/target/bubble listener order", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_dom_event_order.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for CustomEvent propagation ordering across capture, at-target, and bubble phases on nested nodes. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/dom_event_order`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.events.propagation_order\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dom_event_order\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/dom_event_order\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_dom_event_order\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"CustomEvent capture/target/bubble listener order\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_dom_event_stopprop", "input": "stopPropagation blocks ancestors but not same-target listeners", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_dom_event_stopprop.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for Event.stopPropagation preventing ancestor delivery while remaining same-target listeners still fire. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/dom_event_stopprop`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.events.stop_propagation\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dom_event_stopprop\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/dom_event_stopprop\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_dom_event_stopprop\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"stopPropagation blocks ancestors but not same-target listeners\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_dom_mo_attributes", "input": "MutationObserver attributeFilter + attributeOldValue", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_dom_mo_attributes.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for MutationObserver attributes with attributeFilter restricting records and attributeOldValue capturing prior values. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/dom_mo_attributes`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.mutation_observer.attributes\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dom_mo_attributes\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/dom_mo_attributes\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_dom_mo_attributes\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"MutationObserver attributeFilter + attributeOldValue\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_dom_mo_chardata", "input": "MutationObserver characterData oldValue records", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_dom_mo_chardata.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for MutationObserver characterData with characterDataOldValue recording successive text-node edits. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/dom_mo_chardata`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.mutation_observer.character_data\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dom_mo_chardata\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/dom_mo_chardata\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_dom_mo_chardata\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"MutationObserver characterData oldValue records\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_dom_mo_childlist", "input": "MutationObserver childList added/removed record aggregation", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_dom_mo_childlist.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for MutationObserver childList delivering one record per mutation in a single microtask with addedNodes/removedNodes. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/dom_mo_childlist`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.mutation_observer.child_list\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dom_mo_childlist\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/dom_mo_childlist\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_dom_mo_childlist\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"MutationObserver childList added/removed record aggregation\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_dom_nodeiterator", "input": "NodeIterator SHOW_TEXT traversal with acceptNode filter", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_dom_nodeiterator.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for NodeIterator over SHOW_TEXT emitting non-whitespace text nodes in document order. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/dom_nodeiterator`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.traversal.node_iterator\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dom_nodeiterator\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/dom_nodeiterator\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_dom_nodeiterator\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"NodeIterator SHOW_TEXT traversal with acceptNode filter\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_dom_range_extract", "input": "Range.extractContents partial text-node boundary split", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_dom_range_extract.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for Range.extractContents splitting partially selected text nodes across element boundaries and collapsing the range. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/dom_range_extract`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.range.extract_contents\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dom_range_extract\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/dom_range_extract\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_dom_range_extract\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Range.extractContents partial text-node boundary split\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_dom_range_surround", "input": "Range.surroundContents wrapping semantics", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_dom_range_surround.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for Range.surroundContents wrapping a fully selected node in a new parent element. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/dom_range_surround`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.range.surround_contents\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dom_range_surround\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/dom_range_surround\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_dom_range_surround\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"Range.surroundContents wrapping semantics\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_dom_template_content", "input": "template.content inert DocumentFragment and inert script", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_dom_template_content.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for HTMLTemplateElement.content as a disconnected DocumentFragment whose contained script does not execute. The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/dom_template_content`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.template_content\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dom_template_content\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/dom_template_content\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_dom_template_content\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"template.content inert DocumentFragment and inert script\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_dom_treewalker_filter", "input": "TreeWalker acceptNode FILTER_REJECT vs FILTER_SKIP", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_dom_treewalker_filter.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"Runs a fixture-backed Web platform semantics probe for TreeWalker acceptNode returning FILTER_REJECT (prune subtree) vs FILTER_SKIP (skip node, keep children). The scripted CDP driver observes page output from the self-hosted fixture `/v2/wpt_b/dom_treewalker_filter`, and the server-side grader compares it with the Chrome-baked expected answer.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 3000, \"wait_ms\": 200}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.dom.traversal.tree_walker\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"dom_treewalker_filter\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_b/dom_treewalker_filter\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_b\", \"version.v0_2\"], \"task_id\": \"v2_wpt_dom_treewalker_filter\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"TreeWalker acceptNode FILTER_REJECT vs FILTER_SKIP\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_enc_bom_strip", "input": "TextDecoder strips UTF-8 BOM", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_enc_bom_strip.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (encoding): TextDecoder strips UTF-8 BOM. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.encoding.text_decoder\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_enc_bom_strip\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/enc?case=bom_strip\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_enc_bom_strip\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"TextDecoder strips UTF-8 BOM\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_enc_encode_into", "input": "TextEncoder.encodeInto read/written counts", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_enc_encode_into.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (encoding): TextEncoder.encodeInto read/written counts. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.encoding.encode_into\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_enc_encode_into\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/enc?case=encode_into\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_enc_encode_into\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"TextEncoder.encodeInto read/written counts\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_enc_encoding_prop", "input": "TextEncoder.encoding is utf-8", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_enc_encoding_prop.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (encoding): TextEncoder.encoding is utf-8. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.encoding.text_encoder\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_enc_encoding_prop\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/enc?case=encoding_prop\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_enc_encoding_prop\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"TextEncoder.encoding is utf-8\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_enc_fatal_throws", "input": "TextDecoder fatal mode throws on invalid byte", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_enc_fatal_throws.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (encoding): TextDecoder fatal mode throws on invalid byte. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.encoding.fatal\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_enc_fatal_throws\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/enc?case=fatal_throws\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_enc_fatal_throws\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"TextDecoder fatal mode throws on invalid byte\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_enc_labels", "input": "TextDecoder label aliases canonicalize", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_enc_labels.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (encoding): TextDecoder label aliases canonicalize. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.encoding.labels\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_enc_labels\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/enc?case=labels\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_enc_labels\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"TextDecoder label aliases canonicalize\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_enc_nonfatal_replacement", "input": "TextDecoder non-fatal replacement char", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_enc_nonfatal_replacement.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (encoding): TextDecoder non-fatal replacement char. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.encoding.text_decoder\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_enc_nonfatal_replacement\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/enc?case=nonfatal_replacement\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_enc_nonfatal_replacement\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"TextDecoder non-fatal replacement char\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_enc_stream_split", "input": "TextDecoder stream splits a multibyte char", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_enc_stream_split.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (encoding): TextDecoder stream splits a multibyte char. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.encoding.stream\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_enc_stream_split\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/enc?case=stream_split\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_enc_stream_split\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"TextDecoder stream splits a multibyte char\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_enc_surrogate_replace", "input": "TextEncoder replaces lone surrogate", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_enc_surrogate_replace.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (encoding): TextEncoder replaces lone surrogate. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.encoding.text_encoder\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_enc_surrogate_replace\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/enc?case=surrogate_replace\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_enc_surrogate_replace\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"TextEncoder replaces lone surrogate\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_enc_utf8_astral", "input": "TextEncoder UTF-8 of astral (4-byte) char", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_enc_utf8_astral.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (encoding): TextEncoder UTF-8 of astral (4-byte) char. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.encoding.text_encoder\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_enc_utf8_astral\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/enc?case=utf8_astral\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_enc_utf8_astral\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"TextEncoder UTF-8 of astral (4-byte) char\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_store_coerce_string", "input": "localStorage coerces value to string", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_store_coerce_string.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (storage): localStorage coerces value to string. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.local_storage\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_store_coerce_string\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/store?case=coerce_string\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_store_coerce_string\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"localStorage coerces value to string\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_store_cookie_multiple", "input": "document.cookie stores multiple cookies", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_store_cookie_multiple.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (storage): document.cookie stores multiple cookies. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.cookies\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_store_cookie_multiple\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/store?case=cookie_multiple\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_store_cookie_multiple\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"document.cookie stores multiple cookies\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_store_cookie_readwrite", "input": "document.cookie write then read", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_store_cookie_readwrite.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (storage): document.cookie write then read. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.cookies\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_store_cookie_readwrite\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/store?case=cookie_readwrite\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_store_cookie_readwrite\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"document.cookie write then read\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_store_event_fires", "input": "storage event fires in another same-origin context", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_store_event_fires.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (storage): storage event fires in another same-origin context. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.storage_event\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_store_event_fires\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/store?case=event_fires\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_store_event_fires\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"storage event fires in another same-origin context\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_store_key_order", "input": "localStorage key()/length contract (order-insensitive)", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_store_key_order.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (storage): localStorage key() semantics. The fixture asserts the actual WPT storage_key contract in-page — every in-range index returns a distinct existing key, out-of-range returns null, and updating an existing key's value preserves the enumeration order — then reports the sorted key set. No specific enumeration order is required.\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.local_storage\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_store_key_order\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/store?case=key_order\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_store_key_order\", \"task_version\": 2, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"localStorage key()/length contract (order-insensitive)\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_store_local_setget", "input": "localStorage set/get/length/key/removeItem", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_store_local_setget.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (storage): localStorage set/get/length/key/removeItem. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.local_storage\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_store_local_setget\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/store?case=local_setget\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_store_local_setget\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"localStorage set/get/length/key/removeItem\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_store_overwrite_length", "input": "localStorage overwrite keeps length", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_store_overwrite_length.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (storage): localStorage overwrite keeps length. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.local_storage\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_store_overwrite_length\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/store?case=overwrite_length\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_store_overwrite_length\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"localStorage overwrite keeps length\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_store_removeitem_missing", "input": "localStorage removeItem on missing key is a no-op", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_store_removeitem_missing.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (storage): localStorage removeItem on missing key is a no-op. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.local_storage\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_store_removeitem_missing\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/store?case=removeitem_missing\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_store_removeitem_missing\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"localStorage removeItem on missing key is a no-op\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_store_session_local_independent", "input": "sessionStorage is independent of localStorage", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_store_session_local_independent.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (storage): sessionStorage is independent of localStorage. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.storage.session_storage\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_store_session_local_independent\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/store?case=session_local_independent\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_store_session_local_independent\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"sessionStorage is independent of localStorage\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_url_backslash", "input": "URL normalizes backslash in special scheme", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_url_backslash.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (url): URL normalizes backslash in special scheme. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.url.parse\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_url_backslash\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/url?case=backslash\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_url_backslash\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"URL normalizes backslash in special scheme\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_url_default_port_http", "input": "URL drops default port 80", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_url_default_port_http.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (url): URL drops default port 80. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.url.port\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_url_default_port_http\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/url?case=default_port_http\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_url_default_port_http\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"URL drops default port 80\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_url_empty_query", "input": "URL empty query preserves trailing ?", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_url_empty_query.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (url): URL empty query preserves trailing ?. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.url.parse\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_url_empty_query\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/url?case=empty_query\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_url_empty_query\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"URL empty query preserves trailing ?\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_url_idn_punycode", "input": "URL IDN host converts to punycode", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_url_idn_punycode.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (url): URL IDN host converts to punycode. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.url.idn\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_url_idn_punycode\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/url?case=idn_punycode\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_url_idn_punycode\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"URL IDN host converts to punycode\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_url_lowercase_host", "input": "URL lowercases host and scheme", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_url_lowercase_host.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (url): URL lowercases host and scheme. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.url.parse\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_url_lowercase_host\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/url?case=lowercase_host\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_url_lowercase_host\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"URL lowercases host and scheme\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_url_nonspecial_opaque", "input": "URL non-special scheme keeps opaque path", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_url_nonspecial_opaque.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (url): URL non-special scheme keeps opaque path. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.url.parse\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_url_nonspecial_opaque\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/url?case=nonspecial_opaque\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_url_nonspecial_opaque\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"URL non-special scheme keeps opaque path\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_url_pct_space_path", "input": "URL percent-encodes space in path", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_url_pct_space_path.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (url): URL percent-encodes space in path. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.url.percent_encoding\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_url_pct_space_path\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/url?case=pct_space_path\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_url_pct_space_path\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"URL percent-encodes space in path\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_url_protocol_relative", "input": "URL protocol-relative //host resolution", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_url_protocol_relative.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (url): URL protocol-relative //host resolution. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.url.relative\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_url_protocol_relative\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/url?case=protocol_relative\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_url_protocol_relative\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"URL protocol-relative //host resolution\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_url_rel_dot", "input": "URL relative resolution (./ dot segment)", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_url_rel_dot.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (url): URL relative resolution (./ dot segment). The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.url.relative\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_url_rel_dot\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/url?case=rel_dot\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_url_rel_dot\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"URL relative resolution (./ dot segment)\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_url_rel_dotdot", "input": "URL relative resolution (../ dot segments)", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_url_rel_dotdot.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (url): URL relative resolution (../ dot segments). The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.url.relative\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_url_rel_dotdot\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/url?case=rel_dotdot\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_url_rel_dotdot\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"URL relative resolution (../ dot segments)\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_url_sp_getall", "input": "URLSearchParams getAll on repeated key", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_url_sp_getall.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (url): URLSearchParams getAll on repeated key. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.url.search_params\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_url_sp_getall\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/url?case=sp_getall\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_url_sp_getall\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"URLSearchParams getAll on repeated key\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_url_sp_plus_space", "input": "URLSearchParams decodes + as space", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_url_sp_plus_space.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (url): URLSearchParams decodes + as space. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.url.search_params\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_url_sp_plus_space\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/url?case=sp_plus_space\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_url_sp_plus_space\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"URLSearchParams decodes + as space\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_url_sp_set_replace", "input": "URLSearchParams set replaces all values", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_url_sp_set_replace.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (url): URLSearchParams set replaces all values. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.url.search_params\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_url_sp_set_replace\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/url?case=sp_set_replace\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_url_sp_set_replace\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"URLSearchParams set replaces all values\"}"}
{"driver": "node_cdp_probe", "family": "browser-protocol-and-web-platform", "id": "v2_wpt_url_sp_sort", "input": "URLSearchParams sort orders keys", "language": "en", "layer": "L2", "source_path": "tasks/L2/web_platform/v2_wpt_url_sp_sort.json", "source_suite": "l2.web_platform", "task": "{\"artifact_profile\": \"l2_standard\", \"description\": \"WPT-derived L2 mechanism probe (url): URLSearchParams sort orders keys. The self-hosted fixture computes the WHATWG/Web-platform result in-page and writes it to `#out`; the scripted CDP driver reads it and the server-side grader compares against the Chrome-oracle answer. Rewritten from WPT testharness assertions (not run verbatim).\", \"driver\": {\"connect_env\": \"BROWSER_WS\", \"env\": {\"PROBE_SPEC\": {\"read\": \"textContent\", \"selector\": \"#out\", \"settle\": \"nonempty\", \"settle_timeout_ms\": 5000, \"wait_ms\": 250}}, \"kind\": \"node_cdp_probe\", \"script\": \"runner/scripts/l2_fixture_probe.js\"}, \"features\": [\"web.url.search_params\"], \"grader\": {\"checks\": [\"answer_matches_expected\"], \"endpoint\": \"/__grade__/expected_answer\", \"kind\": \"server_side\"}, \"layer\": \"L2\", \"scene\": {\"fixture_id\": \"v2_wpt_url_sp_sort\", \"kind\": \"self_hosted_fixture\", \"url\": \"/v2/wpt_a/url?case=sp_sort\"}, \"subset_id\": \"l2.web_platform\", \"tags\": [\"family.web_platform_a\", \"version.v0_2\"], \"task_id\": \"v2_wpt_url_sp_sort\", \"task_version\": 1, \"timeouts\": {\"hard_kill_ms\": 30000, \"task_ms\": 20000}, \"title\": \"URLSearchParams sort orders keys\"}"}