1059166cb1
- edit tool: add the read-before-edit requirement to the model-facing prompt (with the just-created/edited-this-session exception), matching write's guidance so the model doesn't only learn it via a failed FS_NOT_OBSERVED call. - fsspec-style-fs-seam RFC: correct the acceptance criteria that still claimed a ctx.fileContext service and a fileContext inject — the landed design is the fs/* event gate with the tool injecting fs. - filesystem-tool-schemas RFC: replace the stale "prior full file state" edit requirement with version-freshness wording (any windowed read authorizes a fresh edit; no partial-view flag).
fs/ - filesystem capability family
The filesystem stack: a provider seam (text IO + atomic mutation with an optional version guard), a local implementation, a policy gate plugin (observed-state + read-before-edit + version-guarded write/edit), and the model-facing file tools + executor. All product packages.
| Package | Role | ctx key |
|---|---|---|
fs/ |
Provider seam: text IO + atomic mutation primitives (optional version guard); owns the fs/* policy events |
ctx.fs |
fs-local/ |
Local-filesystem FileSystem implementation |
(registers ctx.fs) |
file-context/ |
Policy gate plugin: observed-state + read-before-edit + version-guarded write/edit, via the fs/* event gate |
(no service — fs/* listeners) |
tool-fs/ |
Model-facing read/write/edit tools AND the executor (reads via ctx.fs, owns read windowing, dispatches fs/*) |
(registers on ctx.tools) |
The interface lives at fs/fs/. A sandboxed, remote, or project-scoped filesystem backend can replace fs-local without touching the seam, the policy gate, or the model-facing tool schemas. The policy (file-context/) is a plugin that participates only through the fs/* event gate, not a service the tool injects — so dropping it gracefully loses the policy and leaves the unconstrained bare provider rather than breaking the tool. A deployment that loads tool-fs/ is expected to also load it.