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Merge branch 'codex/invariant-package-registration-gate' into codex/package-invariant-checks

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# Conflicts:
#	.agents/notes/implemented/architecture/2026-07-19-package-invariant-runtime-contracts.i18n.yaml
#	.agents/notes/implemented/architecture/2026-07-19-package-invariant-runtime-contracts.md
#	.agents/notes/implemented/architecture/2026-07-19-package-invariant-runtime-contracts.zh.md
#	.agents/notes/implemented/architecture/2026-07-19-package-owned-invariant-service.i18n.yaml
#	docs/rfc/INDEX.md
#	packages/AGENTS.md
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Tianyi Cui
2026-07-20 00:54:28 +08:00
parent 941b0411d8 6520f71f94
commit 684fcf3357
683 changed files with 7058 additions and 2430 deletions
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packages/fs/fs-policy/README.md
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@@ -51,13 +51,21 @@ Because the plugin influences the world only through events, removing it does no
### Filesystem tool outcome
**What the model sees**: This plugin adds no prompt or schema. It rejects an edit without a prior read with code `FS_NOT_OBSERVED` and exact message `edit requires reading "<path>" first`. Guarded mutations whose observed version is stale propagate the provider-owned `FS_STALE_VERSION` error. [`dsh-tool-fs`](../tool-fs/README.md) owns the model-facing error wrapper; observation state is never shown.
#### What the model sees
**Token effect**: Zero tokens on allowed operations beyond the ordinary tool result. A denial adds the small retained error result and avoids any success payload.
This plugin adds no prompt or schema. It rejects an edit without a prior read with code `FS_NOT_OBSERVED` and exact message `edit requires reading "<path>" first`. Guarded mutations whose observed version is stale propagate the provider-owned `FS_STALE_VERSION` error. [`dsh-tool-fs`](../tool-fs/README.md) owns the model-facing error wrapper; observation state is never shown.
#### Token effect
Zero tokens on allowed operations beyond the ordinary tool result. A denial adds the small retained error result and avoids any success payload.
#### KV Cache effect
Append-only; newly visible content follows the reusable request prefix and does not invalidate existing KV-cache entries.
## Known Limitations and Deferred Work
- **Observed state does not survive a session resume** — persistence of the `WeakMap` record is deferred, so a resumed session must re-read files before guarded writes/edits.
- **Actors without an agent session can never satisfy the policy** — their edits throw `FS_NOT_OBSERVED` and their writes always resolve `createIfAbsent`, so a non-agent caller cannot overwrite an existing file through the gate.
- **Direct `ctx.fs` reads emit no `fs/observed`** — a file read outside the `read` tool stays unobserved, and a later guarded edit rejects with `FS_NOT_OBSERVED` until the tool reads it.
- **Authorization is version freshness, not view completeness** — any windowed read authorizes a full-file overwrite of an unchanged file, deliberately weaker than a full-view rule ([seam-split RFC](../../../docs/rfc/implemented/simplification/2026-06-26-fsspec-style-fs-seam.md)).
- **Authorization is version freshness, not view completeness** — any windowed read authorizes a full-file overwrite of an unchanged file, deliberately weaker than a full-view rule ([seam-split Agent Note](../../../.agents/notes/implemented/simplification/2026-06-26-fsspec-style-fs-seam.md)).