Files
deepseek-harness/packages/ui/permission/README.md
kingwl 2530bf8aa3 fix(sandbox): address PR #309 review — TOCTOU direction, denial metadata, shared roots, docs
- fs-sandbox: delegate the mutation with the freshly re-canonicalized target
  (not the stale one), so the checked identity is the mutated identity — a
  symlink swapped in after resolve() can no longer escape workspace-write.
- tool-fs: map a denial to an FsError carrying FS_SANDBOX_DENIED (not a plain
  Error), so ToolRegistry keeps the structured code on result.error for
  retry/observers while the message stays the shared marker.
- sandbox-local: derive the Seatbelt writable set from the shared
  writableRoots() helper, so the profile and the fs fence cannot drift.
- gen-doc-graphs: ctx.sandboxPolicy is owned by dsh-sandbox-policy and read only
  by the sandboxed executor/provider (the tool layers use the pure fold).
- docs: bash-sandbox/bash/permission READMEs and bash.md reflect the relocated
  policy home and the sandbox/mode rename; drop the stale stdout.golden.jsonl.
2026-07-20 13:59:18 +08:00

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# @deepseek-ai/dsh-permission
User-facing permission presets through `ctx.permission` ([`PermissionService`](src/index.ts)). Each configured name bundles `sandbox/mode` with `approval/policy`; the defaults are `workspace-write` (`workspace-write` + `ask`) and `danger-full-access` (`danger-full-access` + `never`). The ACP bridge exposes them as one `Permissions` select, while sandbox execution and approval continue to consume their own knobs.
`set(session, name)` records a changed selection in a log-only `permission/preset` event, then calls each knob's setter only when its effective value changes. The selection event precedes the knob events and preserves user intent when presets share a bundle; a net-zero selection appends nothing. `current(events)` prefers a still-matching recorded selection, then the first matching table entry, and otherwise returns `custom`. Clients may display `custom` as the current value, but cannot select it.
The service requires a confining `ctx.bash` executor and `ctx.approval`. A table entry named `custom` throws at load; composition defaults outside the table instead make a zero-event session derive `custom`. See the [acp-agent composition](../../../examples/acp-agent/) and [sandbox switching design](../../../.agents/notes/implemented/feature/2026-07-06-sandbox.md).
## Model Experience
Indirectly, through `dsh-user-approval` and `dsh-tool-bash`, which render the approval-policy prompt, switch notice, and sandboxed tool outcomes selected by this service's knob events; `permission/preset` itself is log-only.
#### KV Cache effect
No direct invalidation; the named consumer owns any request-prefix changes.
## Known Limitations and Deferred Work
- **Only two mechanism knobs are bundled** — presets select sandbox mode and approval policy; an agent/profile choice is not part of `PresetSpec` yet.
- **`custom` is derived-only** — callers can switch away from an unmatched knob combination but cannot target or persist a named custom preset through this service.
- **The preset table is process-level** — configuration is fixed for the plugin lifetime; changing available presets requires reloading the plugin.