fix(proof): reconcile successful mediated HEAD abort

[bizzybee90]

Purpose

Reconcile the one proven successful bodyless HEAD lifecycle from governed staging run 31310002086: both observers recorded matching successful responses, the existing bounded CDP-abort rule completed the CDP side, and Playwright mediation then emitted its corresponding aborted terminal.

Included scope

• Add an explicit per-request marker set only by the existing successful bodyless HEAD CDP-abort exception.
• Complete the mediated side only when the later failure is the exact matching aborted terminal for that marked request.
• Add proof-first and adversarial regressions for the accepted order and every material wider/incomplete shape.
• Amend ADR 0033 and its lifecycle diagram to document the ordered, fail-closed boundary.

Explicit exclusions

• No general ERR_ABORTED or cancelled-fetch allowance.
• No acceptance of reverse terminal order, ordinary cdp-finished, GET/XHR/body-bearing requests, missing or unequal responses, non-2xx responses, duplicate terminals, or incomplete HTTP teardown.
• No app runtime, schema, migration, dependency, workflow, provider, billing, credential, customer-data, staging-schema, public-signup, or production change.

Architecture placement

Current owner / directory:

The governed product-proof live network recorder in scripts/product-proof-live-evidence.mjs; the boundary is documented in ADR 0033.

Dependencies and duplicate-system check:

The change extends the existing dual-observer bodyless-HEAD exception and does not add another recorder, retry layer, or request policy.

Security and tenancy impact

• Authentication / authorization: none; request admission and credential posture are unchanged.
• Tenant isolation: unchanged; the governed two-tenant proof and cleanup contracts remain mandatory.
• Service-role impact: none.
• Provider / webhook impact: none.
• Secrets impact: accepted evidence contains only fixed event codes and an opaque correlation token; adversarial tests prove raw request IDs, URLs and credentials are not exposed.

Data impact

• Schema / migration / RLS / grant impact: none.
• Backfill, retention, or rollback: none; rollback is the protected squash commit.

Verification

• Behavioural tests: proof-first regression failed on the unchanged base; final recorder suite 45/45 passed; adjacent browser/network/evidence suites 262/262 passed; reverse order, ordinary CDP completion, pre-response abort, GET/XHR/body/non-2xx/missing/mismatched/duplicate/incomplete cases remain stopped.
• CI / security review: scoped ESLint, Node syntax, diff and redaction checks passed; independent security audit found zero findings; final local CodeRabbit exact-diff review reported no new findings. Hosted clean-install CI is authoritative for the full repository suite.

Release safety

• Deployment scope: source PR only. After protected merge, only an exact-SHA private Cloudflare preview and governed synthetic staging proof are authorized. Production is not authorized.
• Monitoring / stop conditions: stop on any failed protected gate, wider accepted abort shape, cleanup/postflight/recovery failure, unresolved review, secret exposure, production/provider/schema mutation, or exact-head drift.
• Rollback or containment: do not merge unless every exact-head gate is green; failed staging proof remains diagnostic only, writes no accepted evidence, and must complete cleanup/recovery.

Documentation and generated files

• Docs / diagrams / ADR updates: ADR 0033 text and Mermaid HTTP teardown lifecycle updated.
• Generated-file or lockfile justification: none.

Completion check

• Starts from current origin/main (cbbc2c2ce95d57c900796e4a5bf5c9a4c01d307a).
• No valuable work remains only in a dirty worktree, stash, or local-only branch after publication.
• Source branch will be retired under the branch policy after merge.
• Any PR-size or branch-retention exception is documented below, or neither applies.

Policy exceptions (leave blank when none apply)

PR-size exception rationale:

Retained branch reason / owner / review date / maximum retention date:

Summary by CodeRabbit

• Bug Fixes

  • Improved handling of qualifying bodyless HEAD requests when browser and mediated abort signals arrive in sequence.
  • Invalid, duplicate, incomplete, or mismatched completion events continue to fail safely.
  • Preserved secure, secret-free evidence when request processing stops.

• Tests

  • Added coverage for valid and invalid abort ordering, response requirements, duplicate events, and exact HEAD request matching.

• Documentation

  • Documented the updated request completion sequence and security implications.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: 23729d2e-50f0-416f-b82e-2d7c0582694b

📥 Commits

Reviewing files that changed from the base of the PR and between a5be223 and 47aedc5.

📒 Files selected for processing (1)

• scripts/product-proof-live-evidence.test.mjs

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📝 Walkthrough

Walkthrough

The change updates bodyless HEAD abort reconciliation. Qualifying CDP aborts set a per-request marker. A later mediated terminal completes the lifecycle only when the sequence and responses match. Tests cover valid and fail-closed paths.

Changes

Bodyless HEAD abort reconciliation

Layer / File(s)	Summary
Request eligibility and completion state scripts/product-proof-live-evidence.mjs	The flow identifies bounded HEAD requests, requires matching successful responses, and tracks CDP abort completion.
Ordered terminal reconciliation scripts/product-proof-live-evidence.mjs, docs/adr/0033-authenticated-staging-browser-process-secret-boundary.md	A qualifying CDP abort sets a marker. A later mediated normal finish or matching abort completes the lifecycle. Invalid and incomplete sequences remain fail-closed.
Sequence and terminal validation scripts/product-proof-live-evidence.test.mjs	Tests cover successful reconciliation, invalid ordering, request and response bounds, duplicate terminals, diagnostics, and stopped finalization.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Sequence Diagram(s)

sequenceDiagram
  participant CDP
  participant HTTPCorrelation
  participant MediatedObserver
  participant Evidence
  CDP->>HTTPCorrelation: qualifying HEAD aborted terminal
  HTTPCorrelation->>HTTPCorrelation: set per-request completion marker
  HTTPCorrelation->>Evidence: emit CDP completion event
  MediatedObserver->>HTTPCorrelation: later mediated terminal
  HTTPCorrelation->>Evidence: finalize reconciled lifecycle

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Possibly related PRs

• bizzybee90/bizzybee-app#381: Extends the same HTTP/CDP lifecycle reconciliation with bodyless HEAD abort handling.
• bizzybee90/bizzybee-app#443: Extends the same bounded bodyless-HEAD abort handling and terminal ordering.
• bizzybee90/bizzybee-app#434: Adds related CDP completion tracking and terminal validation.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and concisely describes the main change: reconciling successful mediated HEAD aborts.
Description check	✅ Passed	The description follows the repository template and covers scope, security, verification, release safety, documentation, and completion status.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch codex/fix-product-proof-mediated-head-reconciliation-20260809

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[coderabbitai]

Actionable comments posted: 1

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@scripts/product-proof-live-evidence.test.mjs`:
- Around line 1656-1674: Extend the loop covering the widened GET and xhr
request shapes with a second attempt that records both 2xx responses, then emits
a cdp-failed terminal with aborted status. Assert that this path is refused with
the fixed stop code, while preserving the existing cdp-finished assertions and
teardown checks.

🪄 Autofix

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Path: .coderabbit.yaml

Review profile: ASSERTIVE

Plan: Pro Plus

Run ID: a7ec0ce2-94be-4e2b-99f7-413ad2bbc6b7

📥 Commits

Reviewing files that changed from the base of the PR and between cbbc2c2 and a5be223.

📒 Files selected for processing (3)

• docs/adr/0033-authenticated-staging-browser-process-secret-boundary.md
• scripts/product-proof-live-evidence.mjs
• scripts/product-proof-live-evidence.test.mjs