docs(session): record autonomous validation evidence

[lamemustafa]

Summary

Adds an evidence-led autonomous-session validation ledger, including bounded
remote and strict-local gate observations. This PR changes documentation only;
it does not change extension runtime behaviour.

Root Cause / Decision Record

• The session needed a durable, bounded record of remote observations and
  deliberately unattempted work.
• A documentation-only ledger is the smallest safe change: it records evidence
  without inferring authenticated, release, or Store qualification.
• Eight automated documentation findings are explicitly dispositioned below.

Scope

• Runtime: none.
• Tests: no test source changes; local validation evidence is recorded.
• Docs/governance: docs/AUTONOMOUS_SESSION_2026-08-27.md only.
• Explicitly out of scope: authenticated portal work, browser/Store checks,
  permissions, dependencies, persistence, releases, and runtime changes.

Pack Workflow Preflight

• pnpm workflow:preflight passed before the latest host-binding source
  edit. Earlier missed pre-edit checks are recorded in the ledger as
  verification gaps; a dirty-tree post-edit failure is not called a pass.
• This PR was opened from a Pack branch, not master.
• Latest Pack AGENTS.md guidance was checked.
• PR body keeps the required Pack privacy/review/verification checklist visible.

Sanchika Adoption Gate

• This PR does not consume Sanchika packages or copied Sanchika guidance.
• This PR does not import parent-source paths.

Privacy And Data-Flow Impact

• No new browser or host permissions, network calls, analytics, telemetry,
  session replay, or sensitive-data capture.
• Documentation privacy review of this PR's docs-only diff: PASS — no
  Critical/High documentation findings at head 249ac62.
• Public copy does not strengthen product, portal, release, or Store claims.

Sensitive Surface Review

• No runtime, download, target-binding, delivery, or service-worker code changed.
• The documentation diff contains no real taxpayer data, local paths, raw
  portal URLs/referrers, or portal HTML.

Chrome Web Store Impact

• No Chrome Web Store scope, copy, release, ZIP, provenance, or publishing change.
• No Store readiness claim is made.
• PR title follows Conventional Commits.

Verification

• pnpm workflow:preflight before the latest source edit
• pnpm exec prettier --check docs/AUTONOMOUS_SESSION_2026-08-27.md
• git diff --check
• pnpm exec vitest run tests/repo/unreferenced-module-guard.test.ts — 37 passed.
• The immutable baseline assertion remains fatal; remote GitHub observations
  use explicit github.com/lamemustafa/pack binding and non-fatal unavailable states.
• Earlier full local verification at the preceding docs head: formatter,
  lint, typecheck, Vitest (126 files/2,122 tests), build, and package verification.
• Dependency install/audit, ZIP/release, provenance, and Store commands were
  not run: this docs-only PR does not authorize a release or Store action.
• Strict local current-head review gate is not passed: an exact-head bot
  response exists for 249ac62, but no formal current-head review object exists.

Artifact Evidence

• CI run: normal GitHub checks observed successful at the current head; the
  scheduled reconciliation gate is not yet dispatched.
• ZIP artifact: not produced (not a release PR).
• ZIP SHA-256: not applicable.
• Clean source/head SHA: 249ac62.

PR Review Follow-Up

• Normal GitHub Actions completed for the current head.
• Eight automated-review threads were inspected, dispositioned, and resolved.
• An exact-head automated review response was inspected.
• Strict formal current-head review remains absent; this is an audit gap,
  not a strict-gate pass.
• No follow-up issue is required for the resolved documentation findings.

Thread/comment	Disposition	Commit or evidence
Required verbatim Vitest tail	fixed	6b8a240 adds the captured final three lines.
Immutable baseline check	fixed	6b8a240 pins the baseline commit object.
Missed pre-edit preflight	fixed	6b8a240 records the irreparable verification gap.
Fatal baseline verification	fixed	d19db58 adds set -e before mutable observations.
Guard test did not run at pinned baseline	fixed	1d515c8 labels it a mutable current-tree observation.
Mutable remote observations were fatal	fixed	1d515c8 prints explicit unavailable observations.
Repository selector could be redirected	fixed	d09922d binds all observations to Pack.
Repository host could be redirected	fixed	249ac62 pins github.com and Pack.

Screenshots

Not applicable: this is a documentation-only PR.

[lamemustafa]

@codex review Please review the exact current head 17ae3f6. This PR adds only the autonomous-session validation ledger; verify that it contains no sensitive data, local paths, or stronger-than-observed readiness claims.

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. More of your lovely PRs please.

Reviewed commit: 17ae3f6e9b

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[lamemustafa]

Audit gap recorded: the exact-head Codex response is present, but pnpm review:gate -- --strict-head-review reports no formal chatgpt-codex-connector review object for this head. GitHub required checks are observed green; this is not treated as a local strict-gate pass.

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 17ae3f6e9b

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[lamemustafa]

@codex review Please review the new exact head 6b8a240. It addresses all three prior findings: verbatim Vitest tail, immutable baseline check, and explicit pre-edit preflight gap.

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: 6b8a2401ef

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[lamemustafa]

@codex review Please review the new exact head d19db58. It addresses the remaining baseline-script finding by adding set -e; full local validation passed again.

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Swish!

Reviewed commit: d19db58727

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[lamemustafa]

@codex review Please review the exact current documentation-only head 4726ca9. It records the observed remote/strict-review audit gap without adding any runtime, portal, release, or Store claim.

[chatgpt-codex-connector]

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Reviewed commit: 4726ca954b

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[lamemustafa]

@codex review Please review the exact current documentation-only head 1d515c8. It addresses both latest findings by separating immutable baseline presence from the mutable guard observation and keeping remote observations non-fatal.

[chatgpt-codex-connector]

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Reviewed commit: 1d515c8f43

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[lamemustafa]

@codex review Please review the exact current documentation-only head d09922d. It addresses the sole remaining finding by explicitly binding every remote observation to lamemustafa/pack.

[chatgpt-codex-connector]

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Reviewed commit: d09922dd28

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[lamemustafa]

@codex review Please review the exact current documentation-only head 249ac62. It resolves the host-binding finding by pinning github.com/lamemustafa/pack for every remote observation.

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Chef's kiss.

Reviewed commit: 249ac623cc

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