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  "authorReportedLocalVerification": {
    "source": "https://github.com/PostHog/posthog-js/pull/5322",
    "redFailures": 8,
    "greenWebVitalsTests": 109,
    "rerunForArticle": false,
    "typecheckLimitation": "PR reports incomplete full local typechecking because generated rrweb declarations were unavailable; dependency policy not bypassed",
    "productionTestReported": false
  },
  "claims": [
    {
      "id": "P1",
      "claim": "The PR is merged as 5beb4146 on 20 October 2026.",
      "evidence": "GitHub PR merged flag, timestamp and merge_commit_sha",
      "url": "https://github.com/PostHog/posthog-js/pull/5322"
    },
    {
      "id": "P2",
      "claim": "The prior extension relied on a delayed timer, navigation change or metric-count trigger; there was no hide listener.",
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      "url": "https://github.com/PostHog/posthog-js/blob/8cd9ff4fb94df6002531a2e0618d10f505cba55b/packages/browser/src/extensions/web-vitals/index.ts"
    },
    {
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      "claim": "The merged drain selects beacon/immediate options only for the lifecycle path and resets the buffer.",
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      "url": "https://github.com/PostHog/posthog-js/blob/5beb4146c7cd05b7b00908459d1151fd723abe4f/packages/browser/src/extensions/web-vitals/index.ts#L246-L270"
    },
    {
      "id": "P4",
      "claim": "The hide listeners are registered after the web-vitals observers.",
      "evidence": "Pinned merged registration calls, lines 417–441; this is source ordering, not an independent browser lifecycle observation",
      "url": "https://github.com/PostHog/posthog-js/blob/5beb4146c7cd05b7b00908459d1151fd723abe4f/packages/browser/src/extensions/web-vitals/index.ts#L417-L441"
    },
    {
      "id": "P5",
      "claim": "Two added specifications are parameterised over four metric configurations.",
      "evidence": "Test matrix and added tests",
      "urls": [
        "https://github.com/PostHog/posthog-js/blob/0f97a93147b85765ecb3f3f31b4586a4916f4cbd/packages/browser/src/__tests__/extensions/web-vitals.test.ts#L102-L169",
        "https://github.com/PostHog/posthog-js/blob/0f97a93147b85765ecb3f3f31b4586a4916f4cbd/packages/browser/src/__tests__/extensions/web-vitals.test.ts#L262-L305"
      ]
    },
    {
      "id": "P6",
      "claim": "The immediate options avoid normal request batching; an options object without _batchKey already bypasses it.",
      "evidence": "Pinned core capture branch, lines 2025–2073",
      "url": "https://github.com/PostHog/posthog-js/blob/0f97a93147b85765ecb3f3f31b4586a4916f4cbd/packages/browser/src/posthog-core.ts#L2025-L2073"
    },
    {
      "id": "P7",
      "claim": "Maintainer turnipdabeets adapted listener registration to the project's helper.",
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      "url": "https://github.com/PostHog/posthog-js/commit/0f97a93147b85765ecb3f3f31b4586a4916f4cbd"
    },
    {
      "id": "P8",
      "claim": "The helper centralises passive/capture defaults.",
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      "url": "https://github.com/PostHog/posthog-js/blob/0f97a93147b85765ecb3f3f31b4586a4916f4cbd/packages/browser-common/src/utils/general-utils.ts#L192-L206"
    },
    {
      "id": "P9",
      "claim": "The beacon path can be rejected by the browser and invokes fallback; capture options are not proof of server receipt.",
      "evidence": "Pinned transport source, lines 517–554",
      "url": "https://github.com/PostHog/posthog-js/blob/0f97a93147b85765ecb3f3f31b4586a4916f4cbd/packages/browser/src/request.ts#L517-L554"
    },
    {
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      "claim": "Local 8-red/109-green counts are author-reported, while the final-head CI statuses were independently retrieved for the retrospective.",
      "evidence": "PR narrative plus separate check-runs API",
      "urls": [
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        "https://api.github.com/repos/PostHog/posthog-js/commits/0f97a93147b85765ecb3f3f31b4586a4916f4cbd/check-runs?per_page=100"
      ]
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  ],
  "limitations": [
    "No fresh local or hosted test execution.",
    "No measured production improvement or quantified sampling bias.",
    "Synthetic regression tests mock metric callbacks and dispatch lifecycle events; no server-receipt proof.",
    "No claimed exactly-once transport guarantee.",
    "Merge and CI evidence do not establish academic novelty or peer-reviewed publication."
  ]
}