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docs(fs): enumerate absence observation paths

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Tianyi Cui
2026-08-09 17:40:56 +08:00
parent 7132b9730e
commit 39d8678a02
14 changed files with 19 additions and 19 deletions
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docs/subsystems/filesystem.md
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@@ -238,7 +238,7 @@ interface FileReadOutcome {
## Observed-file state (policy plugin)
Observed state is a `WeakMap<owner, Map<targetKey, FsObservation>>` held inside the `dsh-fs-policy` plugin. Missing map entry means unseen; `{ kind: 'absent' }` means a tool read/view confirmed absence; `{ kind: 'present', version }` means a read, write, or edit observed that version. The write decision maps unseen and absent to `createIfAbsent`, while present maps to `replaceIfVersion`; the edit decision maps unseen to `FS_NOT_OBSERVED`, absent to `FS_NOT_FOUND`, and present to its version guard. The owner is derived from the event actor (normally `exec.agent.session`), treated as opaque and never read. Disposal drops everything (HMR safety), and the policy performs no filesystem I/O.
Observed state is a `WeakMap<owner, Map<targetKey, FsObservation>>` held inside the `dsh-fs-policy` plugin. Missing map entry means unseen; `{ kind: 'absent' }` means a `read` or `str_replace_editor` `view`, `str_replace`, or `insert` metadata miss confirmed absence; `{ kind: 'present', version }` means a read, write, or edit observed that version. The write decision maps unseen and absent to `createIfAbsent`, while present maps to `replaceIfVersion`; the edit decision maps unseen to `FS_NOT_OBSERVED`, absent to `FS_NOT_FOUND`, and present to its version guard. The owner is derived from the event actor (normally `exec.agent.session`), treated as opaque and never read. Disposal drops everything (HMR safety), and the policy performs no filesystem I/O.
## Error taxonomy (provider contract)