deepseek-harness/packages/fs

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)
fs-policy/	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 (fs-policy/) 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.