Checkpoint web parity through Chromium input tasks

docs/status/M13-05H.md

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+# M13-05H Status
+
+status: done  
+task: script audit record integrity  
+updated: 2026-08-19 America/New_York  
+enablingTask: false  
+parityStateChange: false
+
+## Scope
+
+The production scripting audit protocol now has an independent integrity gate. Two default-deny audit
+records are validated with strictly increasing ISO timestamps, contiguous sequence numbers, unique request
+IDs, canonical entry digests and a continuous previous-entry hash chain. Replay, time reversal, sequence
+mutation, entry digest mutation and chain mutation all return `SCRIPT_MANIFEST_INVALID`; execution remains
+disabled.
+
+## Evidence
+
+- `npm --prefix web run test:script-audit-integrity` passed 2 unit tests and the checker.
+- Checker output: `script-audit-integrity-ok entries=2 sequence=1,2 requestIds=unique time=ordered chain=true replay=SCRIPT_MANIFEST_INVALID tamper=3 execution=DISABLED next=M14-01A`.
+- `git diff --check` passed.
+
+## Next Task
+
+`M14-01A`: freeze the current Chromium release, engine and archive hashes.
+
+## Rollback
+
+Remove the audit integrity checker/unit, report, manifest, package command and this status entry; restore
+`M13-05G` as the queue tail.