Checkpoint web parity through Chromium input tasks

docs/status/M12-05A.md

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+# M12-05A Status
+
+status: done
+task: generate the Blender 5.2 runtime format inventory
+updated: 2026-08-18 America/New_York
+enablingTask: false
+parityStateChange: false
+
+## Scope
+
+The pinned `build_blender_5.2.0/bin/blender` runtime generated seven separate format records:
+GLTF, GLB, OBJ, STL, PLY, USD, and ALEMBIC. Each record binds import/export operator paths,
+registered state, RNA identifier, canonical property identifiers and enum items, file extensions,
+format variants, and the build option that gates the operator.
+
+The runtime receipt also binds Blender 5.2.0 LTS version tuple, build hash/branch/platform/type/date,
+commit timestamp, selected build options, and the Blender binary SHA-256. On this pinned build,
+GLTF/GLB/OBJ/STL/PLY are `AVAILABLE`; USD and Alembic are explicitly `OPERATOR_UNREGISTERED` because
+`bpy.app.build_options.usd` and `alembic` are false. This is inventory evidence only and does not
+claim import/export round-trip parity.
+
+## Evidence
+
+- `node tools/web/check-io-format-runtime-inventory.mjs` passed; the generator was rerun in a fresh
+  process and matched the committed JSON byte-for-byte.
+- Inventory has 7 formats, 5 available format families and 2 build-disabled families. All available
+  operators have canonical non-empty RNA property lists; disabled operators fail closed.
+- Runtime receipt records binary SHA-256
+  `d4483926610484ef9c2ad9241aae1469f934d955ebe791f1920e263e0ba85b82`.
+
+## Artifact Hashes
+
+- parent manifest: `989d417ab44e165849c7054f331f7038ec1d779349c39dd4f5b30050bbaecf56`
+- generator: `aa926397664240a5195f8864fc3ed5549bafcc963a03c513c7e37926b0559d7d`
+- checker: `12853306ea5eb2698ab636c7dfc2f27ae140295641473c57b84f93fa13d4864e`
+- inventory: `0d660b0fd8b647ebbf4e91afebd5006bd100973ab8e2507a5bfe759f477b33b4`
+- package commands: `cfb232baa494ff59f6c8d65514a08c86332ee9354350b2a0392b6f932a7ee42c`
+- manifest: `202b144c91f8e2c39477e257aeb26f9bd0b1b05b459ff8a246668024e94deec7`
+
+## Next Task
+
+`M12-05B`: declare import/export, local/server, geometry/material/animation support separately for
+each inventoried format.
+
+## Rollback
+
+Remove the runtime inventory generator/checker, format inventory, golden manifest, and this status
+entry. Restore M12-04J as the queue tail and move the machine queue back to `M12-05A`. No parity
+ledger rollback is required.