M12-03G Status

status: done task: block every linked data writer before Main mutation updated: 2026-08-17 America/New_York enablingTask: false parityStateChange: false

Scope

The schema-1 linked mutation gate covers object transforms, mesh geometry, mesh material slots, material properties, material image nodes, and packed image data. Every request must identify a SOURCE_LIBRARY owner with linkedLibrary=true and readOnly=true. A current linked request is blocked with LINKED_DATA_MUTATION_BLOCKED before any Main writer can run; stale revisions remain REVISION_CONFLICT, and malformed or ownership-substituted requests fail closed.

This task does not claim a linked writer, reload, relocation, missing-library recovery, or full N-023 Link parity. The desktop linked ownership contract is the M12-03F input to this gate.

Evidence

npm --prefix web run test:library-linked-mutation passed 3/3 unit tests.
All six linked writer operations return BLOCKED with exactly LINKED_DATA_MUTATION_BLOCKED, recoverable=false, and no Main mutation path. The test also verifies the schema round-trip for each operation.
A stale revision returns REVISION_CONFLICT; an unknown field, unsupported operation, or owner / read-only substitution returns TASK_VALIDATION_FAILED or LINKED_DATA_MUTATION_BLOCKED before any writer invocation.

Artifact Hashes

protocol: f629e0e7e04dc1f5437b6e2ca62fbe35484fc238830fa47e8358bcab46b7e104
unit: f19d47cefe89daf6123062e045ec717e6ffe60977e8a4b20c996dd62e49da211
manifest: 890891fda5c91b08d157927170fb33190ae0d8a49f8962b88c8554307c0c06a8
package commands: cfb232baa494ff59f6c8d65514a08c86332ee9354350b2a0392b6f932a7ee42c

Next Task

M12-03H: library reload replaces only the matching linked generation snapshot.

Rollback

Remove the linked mutation protocol, unit suite, manifest, package command, and this status entry. Restore M12-03F to pending and move the machine queue back to M12-03F. No parity ledger rollback is required.

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