Checkpoint web parity through Chromium input tasks

docs/status/M13-05G.md

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+# M13-05G Status
+
+status: done  
+task: fuzz crash minimization and regression capture  
+updated: 2026-08-19 America/New_York  
+enablingTask: false  
+parityStateChange: false
+
+## Scope
+
+The deterministic runner replays 16 mutations in each of the blend, image, font, node-graph and script
+manifest domains using seed `1511506142`. Every case returns one structured `ACCEPTED` or `REJECTED`
+receipt; a non-zero runner exit first writes a replayable corpus sample. This run completed 80 cases with
+zero crashes and an empty minimized corpus. Script execution remains disabled.
+
+## Evidence
+
+- `npm --prefix web run test:fuzz-regression` passed.
+- Checker output: `fuzz-regression-ok seed=1511506142 cases=80 crashes=0 corpus=0 execution=DISABLED next=M13-05H`.
+- `git diff --check` passed.
+
+## Artifact Hashes
+
+- parent manifest: `34043df0515f4b422a2b265d38978dd3c7f21acd12753c99f9a50f9b23f8bd60`
+- runner: `a4d5d1b743b454705b1c3a257f1f36d1fea8abd77442e11fb1fec9e2905a3f79`
+- checker: `55c8fa3776b22eb3f2e2ffd1629f0092384df30ef3913699a1ba93b283d641d8`
+- package: `1feb509789d7f06019390bd86197bb9851cd520fd9fe310d1e29bfc3d2ef3f18`
+- report: `5eb4a5469732697be7910fded3ce34cf2898735f767d94c1abbe0dd264bcc0d9`
+
+## Next Task
+
+`M13-05H`: fuzz corpus replay and release-boundary exclusion.
+
+## Rollback
+
+Remove the fuzz runner/checker, report, manifest, package command and this status entry; restore
+`M13-05F` as the queue tail.