feat(pwsh): mirror the bash sandbox surface — denial rendering, escalation, and the ConstrainedLanguage contract

tool-pwsh now renders sandbox denial facts (denial marker + same-turn escalation hint, runner-failed notice on background reads) and advertises the sandbox_permissions/justification escalation pair resolved through ctx.approval before execution — the shared fail-closed sequence from dsh-sandbox, with the tool name 'pwsh'. The description teaches the ConstrainedLanguage contract under the Windows sandbox (both confined modes run pwsh in CLM: Add-Type, non-core .NET statics, COM, and reflection fail; the mode cannot be lifted — probe-verified, pinned by LANGMODE assertions in the runner suite and description assertions in the tool suite). The stale pwsh-sandbox JSDoc ('the tool owns approval') and the parity notes' superseded 'minus sandbox' claims are corrected.
2026-08-08 20:11:21 +08:00
parent 2dd9af6f4b
commit 83f835e4cb
18 changed files with 471 additions and 82 deletions
@@ -10,13 +10,13 @@ The first Windows-native foundation shipped `dsh-tool-pwsh` as a deliberately mi

 ## Decision

-`dsh-tool-pwsh` now mirrors `dsh-tool-bash` call-for-call, minus the sandbox surface, and its model-visible text describes exactly that behavior:
+`dsh-tool-pwsh` now mirrors `dsh-tool-bash` call-for-call, and its model-visible text describes exactly that behavior:

 - **Rendering adopts the bash story verbatim**: stdout, a marked `[stderr]` section, truncation notices with spill paths, `(no output)` for an empty body, and exit markers only for non-zero exits — a clean exit produces no marker. The description and the `tool:pwsh` prompt section state this precisely ("Non-zero exits are reported as `[exit code: N]` markers"), deliberately not copying the bash prompt's "every result" phrasing, which its own renderer contradicts.
 - **`run_in_background` is wired through the generic task runtime** exactly like the bash tool: preflight, owner registration, `task_output`/`task_kill` control, and the same outcome mapping. `pwsh-local`'s already-mirrored `start()` handle backs it.
 - **The `DSH_*` environment is shared, not duplicated**: `BashEnvRegistry` moved out of `dsh-tool-bash` into a new tool-independent `@deepseek-ai/dsh-bash-env` package (`ctx.bashEnv` + built-ins + the session-persistence contributor), and both shell tools inject it. Contributors apply to pwsh calls exactly as they do to bash calls; shared environment ownership therefore sits outside either model-facing shell tool.
 - **Windows reality is pinned where bash has no analog**: every command runs under a UTF-8 output preamble so the Windows PowerShell 5.1 fallback cannot garble non-ASCII output through the UTF-8-decoding collector, and the prompts teach that Windows forced termination settles as exit 1 without a signal marker.
- **Out of scope, unchanged**: sandbox escalation (waits for a Windows-confining executor) and persistent PTY shells (backends are Linux/macOS-only; ConPTY is roadmap work). The pwsh-specific terminal card with an exit pill shipped separately in the [pwsh UI presentation matches bash](2026-08-05-pwsh-ui-bash-parity.md) decision.
+- **Out of scope, unchanged**: persistent PTY shells (backends are Linux/macOS-only; ConPTY is roadmap work). Sandbox escalation shipped later with the [Windows ACL sandbox decision](2026-08-08-windows-acl-restricted-token-sandbox.md) — the pwsh tool now carries the sandbox denial rendering and the same-turn `sandbox_permissions` escalation surface, plus the Windows ConstrainedLanguage contract in its description. The pwsh-specific terminal card with an exit pill shipped separately in the [pwsh UI presentation matches bash](2026-08-05-pwsh-ui-bash-parity.md) decision.

 ## Alternatives considered

@@ -28,7 +28,7 @@ The first Windows-native foundation shipped `dsh-tool-pwsh` as a deliberately mi

 ## Consequences

- The bash and pwsh tools are now behaviorally interchangeable for foreground and background shell work (minus sandbox), and the pwsh prompt/description sentences are each backed by the renderer — the reviewer's grep-against-code check passes.
+- The bash and pwsh tools are now behaviorally interchangeable for foreground, background, and sandboxed shell work (the sandbox surface arrived with the Windows ACL sandbox decision), and the pwsh prompt/description sentences are each backed by the renderer — the reviewer's grep-against-code check passes.
 - Parity ran BOTH ways once: the pwsh tool's structured foreground abort (`HarnessError('tool call aborted', TOOL_ABORTED)` with name `AbortError`) was backported to the bash tool, replacing its uncoded `Error('command aborted')` — a model-visible/logged change pinned by exact-shape tests on both sides and by the cancel-tool-calls fixture.
 - `@deepseek-ai/dsh-bash-env` is a new shipped package; `dsh-tool-bash`'s `dshHome` config moved there, so compositions mounting the shell tools must also mount `bash-env` (the spine bundles do).
 - Windows-only semantics (CRLF normalization, forced-termination exit-1/signal-null, POSIX-only self-signal) remain pinned by tests as before.