# M12-03F Status

status: done
task: create a desktop linked Object fixture preserving source-library ownership
updated: 2026-08-17 America/New_York
enablingTask: true
parityStateChange: false

## Scope

Blender 5.2 creates a source library containing one Object with a Mesh, Material, and packed Image
dependency closure. A clean target links only the selected Object with `bpy.data.libraries.load(link=True)`.
The Object, Mesh, Material, and Image retain the source library pointer, have no library override,
and map to read-only `SOURCE_LIBRARY` ownership. The target is saved, reopened in a new Main load,
and compared to the pre-save linked graph.

This task freezes the desktop LINK contract only. It does not implement a WASM link writer, linked
mutation, reload/relocate, missing-library placeholders, or full N-023 parity.

## Evidence

- `npm --prefix web run test:library-link-desktop` passed the manifest/artifact hash gate, Blender
  5.2 generator rerun, and canonical report comparison.
- The fixture links one root and four dependency IDs. All three dependency edges, 4 vertices, 4
  edges, 1 polygon, 4 loops, `UVMap`, material slot, packed 2x2 sRGB RGBA image, and Float32 pixel
  SHA-256 `6f0f8c231d65149e69e6ed12d370bcfa095ef90adc202065492ea8c8ef17e45a` survive save/reopen.
- Every linked ID reports `library=m12_link_source.blend` and `isLibraryOverride=false`; all four
  stable mappings are `SOURCE_LIBRARY/readOnly=true`. A temporary source/target regeneration matches
  the canonical report after normalizing only session-bound blend container hashes.

## Artifact Hashes

- generator: `15a2e34c1c5b2a8ee63b10084dbb894e0f9677b9e1cf4adb7e2ddce6b4c965b1`
- checker: `6a4c024bea227d7bc14f793467b91766b006459fe4d7717cc75dfee12f49f894`
- source `.blend`: `fae97569e9d2e2066fc92749672f86cc42717cd9b97b012faeb9eb92015d7fd1`
- target `.blend`: `acdaf0f297deb08c84e1a8beba30972e3414ef62e60e3b103fe0661199c438a1`
- desktop report: `b278d4c254eff63d41c8cb3ea1d5e0984192137d45b1695ba0672e16f95b58ea`
- manifest: `8220a8f5d560d45a75a62cbed645b3febc1390fe37b07c3c48871fefc1a9b159`
- package commands: `336d8df1914aaaafaeccc181d4e73ed7058165f10e167efe539939c3ac1e0536`

## Next Task

`M12-03G`: linked data writers must fail closed with `LINKED_DATA_MUTATION_BLOCKED`.

## Rollback

Remove the M12-03F link generator/checker, source and target fixtures, desktop report/manifest,
package command, and this status entry. Restore M12-03E to pending and move the machine queue back
to `M12-03E`. No parity ledger rollback is required.