## Why
The repo moved from a chunk-based delivery model with `.agents/skills/`
as the canonical skill source to a plugin model. Several files retained
references to the old model that were either dead code or misleading
framing.
## Impact
- `tests/test-install.sh`: dead `.agents/skills/` test blocks removed;
suite now tests only what `install.sh` actually deploys
- `scripts/deploy-manifest.sh`: `DEPLOY_SKILLS_SRC` variable and stale
`sync.sh (Chunk 6)` comment removed
- `tests/test-git-hooks-install.sh`: fixture stub no longer declares
the removed `DEPLOY_SKILLS_SRC` variable
- `docs/VISION.md`: chunk delivery framing replaced with plugin model
language throughout; manual test plan date updated
- `tests/test-instructions-and-docs.sh`: stale test plan date flagged
as pre-refactor so readers know a re-run is needed
Refs: #15
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
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