Files
deepseek-harness/packages/fs/README.md
Dudu-0223 ef37ce3b9d refactor(fs): split filesystem seam into provider ctx.fs + policy ctx.fileContext
Implements the split-the-filesystem-seam RFC. ctx.fs shrinks to a text-storage
provider seam (resolve/stat/readText/streamText/writeText/editText with branded
FsTargetKey/FsVersion and an explicit FsWriteExpectation); the new
dsh-file-context package owns the model-facing policy (read windowing,
observed-state, write/edit freshness) as the concrete ctx.fileContext service.

Authorization is now freshness-based rather than full/partial view: a windowed
read records the file version and authorizes a later edit when the file is
unchanged, removing the dead-end where reading lines 100-150 of a large file
could not edit line 120. editText stays a provider primitive so version guard +
literal match + atomic rewrite remain one critical section, and the stale check
runs before matching so a stale edit reports FS_STALE_VERSION. tool-fs injects
fileContext, never reaching around to ctx.fs (the no-bypass contract).
2026-06-26 17:23:18 +08:00

1019 B

fs/ - filesystem capability family

The filesystem stack: a provider seam (text IO + guarded mutation), a local implementation, a policy layer (read windowing + write/edit freshness), and the model-facing file tools. All product packages.

Package Role ctx key
fs/ Provider seam: text IO + guarded mutation primitives ctx.fs
fs-local/ Local-filesystem FileSystem implementation (registers ctx.fs)
file-context/ Policy layer: observed-state, read windowing, write/edit freshness ctx.fileContext
tool-fs/ Model-facing read/write/edit tool schemas (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 layer, or the model-facing tool schemas. The policy layer (file-context/) is a concrete service, not a swappable seam — it owns the model-facing observation policy that does not belong on a provider backend.