fix(cursor): name the real catalog in native-exec denials when no shell bridge exists

[001005HS]

Summary

Fixes #4542.

When the Cursor adapter denies a server-driven native read / ls / grep / write / delete / shell / fetch exec frame (nativeLocalExec unset or off), the refusal text is a fixed string that redirects the model to shell_command / exec_command (native-exec-fs.ts NATIVE_LOCAL_EXEC_DISABLED, native-exec-shell.ts nativeShellDisabledMessage(), native-exec-network.ts NATIVE_FETCH_DISABLED).

That wording is right for a Codex-style catalog. It is wrong for a delegation-only client — an orchestrator that exposes nothing but its own Responses tools (for example a single task tool) — because neither alias exists in that catalog. cursor/kimi-k3 takes the refusal literally: it looks for shell_command, does not find it, and ends the turn with "the tools I was told to use are not in my tool list" instead of calling ocx_client_task, which is listed. The adapter already gates the shell-alias system note on cursorRequestHasShellAlias; the exec-channel refusal was not gated the same way.

Change

• src/adapters/cursor/native-exec.ts: new cursorNativeExecRedirectHint(tools, mcpToolDefs). Returns undefined when the visible catalog has a shell alias or an execution-path tool (exec_command / shell_command / unified exec), so those catalogs keep today's wording byte-for-byte. Otherwise it returns a silent-redirect message that names the catalog's real wire names (bare client tools as ocx_client_*, namespaced tools in their namespacedToolName form, both displayed by the harness as mcp_opencodex-responses_<name>, plus configured MCP server tools advertised through prepareMcp as mcp_<provider>_<name>), capped at 16 names. The text is neutral about what those tools can do: it tells the model to pick the listed tool that fits — a listed file/search/fetch tool if there is one, otherwise the delegating tool — and never claims the request has no read or fetch tool. CursorNativeExecContext gains nativeExecRedirectHint?: string; handleCursorNativeExec passes it to every policy-denial helper.
• native-exec-fs.ts, native-exec-shell.ts, native-exec-network.ts: the reject*ExecForPolicy helpers and nativeShellDisabledMessage take an optional hint and fall back to the existing strings when it is undefined. No constant text changed.
• live-transport.ts: sets nativeExecRedirectHint on the per-request exec context from the same cursorVisibleTools that already drive clientToolDefs / structuredEditAvailable, plus the mcpToolDefs already on the context.
• structure/providers/cursor.md: one paragraph in Cursor Native Exec describing the catalog-dependent wording.

The hint keeps the gap-8 silent-redirect framing (no "blocked / disabled / denied" words, "Do NOT narrate …"), which the new tests assert.

Measured (2.53.0, same single-tool /v1/responses request repeated, counting turns that emitted the task function call)

route	before	after
cursor/kimi-k3	2 / 6 (12–20 s, native Read/Shell loop then gives up)	6 / 6 (~4 s)
devin/kimi-k3 (control, same model)	2 / 2	—
cursor/grok-4.6 (control, same adapter)	1 / 1	—
orchestrator TUI (omo/senpi, cursor/kimi-k3, tools = task only)	0 / 6	3 / 3

Test plan / Verification

Added to tests/providers/cursor/cursor-native-exec-policy.test.ts (new describe("Cursor native exec catalog-aware redirect hint"), 7 tests):

• hint names ocx_client_* wire names, the mcp_opencodex-responses_<name> display form, keeps "Do NOT narrate", never mentions shell_command / exec_command, never claims "no read/fetch tool" or "ONLY callable", and matches none of the gap-8 forbidden patterns;
• configured MCP tool definitions are listed by their mcp_<provider>_<name> display form, also when the client catalog is empty; nothing advertised at all keeps the default wording;
• undefined for an undefined/empty catalog and for catalogs carrying bare exec_command, bare shell_command, or unified exec (default wording preserved);
• namespaced MCP tools are listed by wire name; a 20-tool catalog is capped at 16 with (+4 more);
• nativeShellDisabledMessage() unchanged without a hint, returns the hint verbatim with one;
• with a hint on the exec context, every denied frame (read, ls, grep, write, delete, shell, shellStream, backgroundShellSpawn, writeShellStdin, fetch) carries the hint, never the bridge aliases, and executes nothing (file content not leaked, nothing written or deleted, shell not run, fetch not called);
• LiveCursorTransport.run() derives the hint from the turn's visible catalog plus the advertised MCP defs: [task] → hint with ocx_client_task and mcp_opencodex_read_file; [task, exec_command] → undefined.

Commands run on this branch (Ubuntu 24.04, Bun 1.4.0):

bun test tests/providers/cursor/cursor-native-exec-policy.test.ts tests/providers/cursor/cursor-silent-redirect.test.ts tests/providers/cursor/cursor-native-exec.test.ts tests/providers/cursor/cursor-native-exec-shell.test.ts tests/providers/cursor/cursor-live-transport.test.ts
  → 105 pass, 0 fail (re-run on each commit: 104/0 on 4f07562, 105/0 on 369d498 and 5777e9d)
bun run typecheck        → exit 0
bun run structure:check  → "structure/ SSOT checks passed"
bun run privacy:scan     → "Privacy scan passed"
bun run test:changed     → aborted by a Bun 1.4.0 test-worker SIGSEGV in tests/routing/routing-policy-surface-parity.test.ts (that file passes in the full run below; not related to this diff), so I ran the full suite instead
bun run test             → 24,803 pass / 2 fail. The 2 failures are the bubblewrap sandbox tests in tests/clients/remote-workspace-command-runner.test.ts, which fail identically on pristine dev (a84e6e8) on this host where bwrap cannot run — base run: 24,793 pass / 2 fail, same two tests

Live check: the patched adapter has been running on my proxy against real cursor/kimi-k3 traffic (numbers above). Re-checked after the review follow-up (neutral wording): raw request 3/3 delegations, orchestrator TUI fresh session delegated on the first turn.

Checklist

• Scope stays focused and avoids unrelated cleanup.
• Docs or release notes were updated when needed (structure/providers/cursor.md; no user-facing config or docs-site change — the wording is model-facing only).
• Security-sensitive changes were reviewed for secrets, auth, and unsafe defaults — native local exec stays denied by default; only the denial text depends on the catalog, and it is derived from tool names the client already sent.

No gui/ changes.

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https://claude.ai/code/session_01Y9KEo9eSg5n58ShbrkgSCf

Summary by CodeRabbit

• New Features

  • Improved guidance when native file, shell, or network operations are unavailable, directing requests to tools available in the current request.
  • Redirect messages now reflect client, namespaced, and MCP tools, with concise handling for large tool catalogs.
  • Denied write operations continue to clearly indicate that no file was changed.

• Documentation

  • Documented native execution redirect behavior and supported tool naming.

• Tests

  • Added coverage for catalog-specific guidance, tool limits, and denied-operation responses.

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-09-13T18:40:42.030154Z	4f07562	PR opened

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📝 Walkthrough

Walkthrough

Cursor native-exec refusals now include catalog-aware redirect hints. The live transport derives hints per turn, refusal handlers propagate them across denied operations, and tests verify naming, fallback behavior, safety, and transport wiring.

Changes

Cursor native-exec redirect flow

Layer / File(s)	Summary
Catalog hint generation src/adapters/cursor/native-exec.ts	Adds nativeExecRedirectHint and cursorNativeExecRedirectHint. The helper names available client and MCP tools, limits the list to 16 entries, and omits the hint when a shell alias or execution-path tool exists.
Hint propagation through refusal paths src/adapters/cursor/native-exec.ts, src/adapters/cursor/native-exec-fs.ts, src/adapters/cursor/native-exec-network.ts, src/adapters/cursor/native-exec-shell.ts	Passes optional hints through denied filesystem, shell, and fetch responses. Write and delete responses retain the "No file was changed." suffix.
Per-turn wiring and regression coverage src/adapters/cursor/live-transport.ts, structure/providers/cursor.md, tests/providers/cursor/cursor-native-exec-policy.test.ts	Derives the hint from the visible tool catalog, documents the redirect payload, and tests naming, response coverage, filesystem safety, and per-turn behavior.

Priority: ➖ Normal

Estimated code review effort: 3 (Moderate) | ~20 minutes

Change: Bug fix · Severity of issue fixed: Medium

Possibly related PRs

• lidge-jun/opencodex#1887: Both changes route Cursor native-exec refusals through advertised delegation or execution bridges.

Merge Risk: 🔵 Low · up to 5777e

Code-mode requests that trigger a denied native operation may be directed to unavailable shell tools, causing the operation to be abandoned in this narrow workflow.

🚥 Pre-merge checks | ✅ 3 | ❌ 2

❌ Failed checks (2 warnings)

Check name	Status	Explanation	Resolution
Linked Issues check	⚠️ Warning	Issue #4542 requires catalog-aware guidance for denied read, write, delete, list, grep, shell, streaming shell, background shell, and shell-stdin operations, and requires fetch wording to remain uncha…	Call rejectFetchExecForPolicy(execMsg) without deps.nativeExecRedirectHint in the fetch denial branch of src/adapters/cursor/native-exec.ts. Keep the catalog hint for the required filesystem and shell denial paths. Update the `fetchAr…
Docstring Coverage	⚠️ Warning	Docstring coverage is 8.33% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 24 functions across 6 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (3 passed)

Check name	Status	Explanation
Out of Scope Changes check	✅ Passed	The changed native-exec rejection plumbing, per-request catalog derivation, client and MCP name formatting, regression tests, and Cursor documentation support issue #4542. The fetch hint is a violatio…
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly and concisely describes the main change: native-exec denial messages now name the actual tool catalog when no shell bridge exists.

Full details: Linked Issues check

Explanation

Issue #4542 requires catalog-aware guidance for denied read, write, delete, list, grep, shell, streaming shell, background shell, and shell-stdin operations, and requires fetch wording to remain unchanged. The implementation provides the catalog helper in src/adapters/cursor/native-exec.ts, derives client and MCP names in src/adapters/cursor/live-transport.ts, preserves bridge fallback behavior, and adds regression coverage in tests/providers/cursor/cursor-native-exec-policy.test.ts. However, src/adapters/cursor/native-exec.ts passes deps.nativeExecRedirectHint to the fetch rejection path, and src/adapters/cursor/native-exec-network.ts uses that hint in rejectFetchExecForPolicy. The test also expects catalog redirect text for fetchArgs. This changes the fetch behavior that issue #4542 explicitly says to leave unchanged.

Resolution

Call rejectFetchExecForPolicy(execMsg) without deps.nativeExecRedirectHint in the fetch denial branch of src/adapters/cursor/native-exec.ts. Keep the catalog hint for the required filesystem and shell denial paths. Update the fetchArgs regression case in tests/providers/cursor/cursor-native-exec-policy.test.ts to assert the unchanged NATIVE_FETCH_DISABLED wording, then rerun the targeted tests and CI checks.

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✅ Deterministic PR hygiene checks passed.

[lidge-jun]

리뷰 · 우선순위 71 / 80

이 PR은 Cursor 어댑터가 네이티브 local exec를 거절할 때 모델에게 보내는 안내 문장을, 그 요청의 진짜 도구 목록에 맞게 바꾸는 수리입니다. 이슈 #4542를 고칩니다. 지금 로컬 dev HEAD는 6d2e1af6c(직전 스냅샷과 동일)이고, 방금 dev에 들어온 큰 줄은 #4533 기여자 캐리 트레인 아카이브입니다. 그 앞에는 #4531 history preflight, #4515 웹검색 패스스루 브리지, 데스크톱 재시작 쪽이 있습니다. 이 PR은 그 릴리즈·문서 열차와는 다른 축입니다. Cursor live transport의 silent-redirect 문장( gap-8 / #2665 계열)입니다. base는 dev입니다.

현재 dev에서는 nativeLocalExec가 꺼져 있거나 없을 때, Cursor가 서버로 보내는 native read / ls / grep / write / delete / shell / fetch 프레임을 전부 거절합니다. 거절 문장은 고정입니다. src/adapters/cursor/native-exec-fs.ts의 NATIVE_LOCAL_EXEC_DISABLED, native-exec-shell.ts의 nativeShellDisabledMessage(), native-exec-network.ts의 NATIVE_FETCH_DISABLED가 shell_command / exec_command(그리고 mcp_opencodex-responses_* 표시 이름)로 다시 내라고 말합니다. Codex식 카탈로그에는 그 브리지가 있어서 맞습니다. 그런데 오케스트레이터처럼 카탈로그에 task만 있고 셸 브리지가 전혀 없으면, 모델(특히 cursor/kimi-k3)이 그 문장을 글자 그대로 믿습니다. 없는 브리지를 찾고, “목록에 없다”고 턴을 끝냅니다. 같은 모델·같은 카탈로그를 devin/kimi-k3로 보내면 바로 task를 부릅니다. 모델 문제가 아니라 거절 문장 문제입니다.

이미 같은 어댑터는 셸 브리지 시스템 노트를 cursorRequestHasShellAlias로 막아 둡니다(tool-guidance.ts / protobuf-request.ts). exec 채널 거절 문장만 그 게이트가 없었습니다. 이 PR은 src/adapters/cursor/native-exec.ts에 cursorNativeExecRedirectHint(tools)를 넣습니다. 보이는 카탈로그에 셸 별칭이나 execution-path 도구(exec_command / shell_command / 통합 exec)가 있으면 undefined를 돌려서 지금 문장을 바이트 단위로 유지합니다. 둘 다 없으면 ocx_client_* 와이어 이름과 mcp_opencodex-responses_<name> 표시 형태를 최대 16개까지 적은 silent-redirect 문장을 만듭니다. CursorNativeExecContext에 nativeExecRedirectHint가 생기고, live-transport.ts가 이미 clientToolDefs / structuredEditAvailable에 쓰는 그 cursorVisibleTools로 힌트를 채웁니다. handleCursorNativeExec가 정책 거절 헬퍼마다 그 힌트를 넘깁니다. 힌트가 없으면 예전 상수·함수가 그대로입니다.

파일은 일곱 개입니다. 핵심은 native-exec.ts(+41), 거절 헬퍼 시그니처 확장(native-exec-fs.ts / native-exec-shell.ts / native-exec-network.ts), live-transport.ts(+2), structure/providers/cursor.md Cursor Native Exec 절(+8), tests/providers/cursor/cursor-native-exec-policy.test.ts(+160). 테스트는 힌트 내용(이름·금지 단어·브리지 미언급), 브리지/빈 카탈로그에서 undefined, 16개 캡, 힌트 있을 때 read/ls/grep/write/delete/shell/shellStream/background/stdin/fetch가 모두 힌트를 타고 실행은 안 함, live transport가 [task]면 힌트·[task, exec_command]면 undefined를 고정합니다. 본문 측정은 2.53.0에서 cursor/kimi-k3가 task를 부른 턴이 2/6 → 6/6, 오케스트레이터 TUI는 0/6 → 3/3입니다. types.ts/config.ts 분리 캠페인과 겹치지 않습니다. 보안 기본값(네이티브 local exec 기본 거절)은 그대로이고, 바꾸는 것은 거절 텍스트뿐입니다.

라인 native-exec.ts cursorNativeExecRedirectHint JSDoc - Local patch (hs, 2026-09-14) on top of 2.53.0 — see ~/.opencodex/patches. 같은 개인 패치 메모가 소스 주석에 남아 있습니다. merge 전에 지워야 합니다. 제품 계약이 아닙니다.
라인 native-exec.ts cursorNativeExecRedirectHint - 카탈로그가 undefined/빈 배열이면 undefined라서 예전 브리지 문장이 나갑니다. 빈 카탈로그에도 shell_command를 가리키는 셈인데, 이 PR 범위(위임 전용 클라이언트) 밖 가장자리입니다.
경로/심볼 - code-mode만 있는 카탈로그(통합 freeform exec만, 셸 브리지 없음)는 cursorRequestHasExecutionPath가 true라 힌트가 꺼지고, 기본 문장은 여전히 shell_command/exec_command를 가리킵니다. 어댑터 주석도 code-mode에서 그 이름이 없다고 이미 경고합니다. 이번 PR 범위 밖 follow-up입니다.
경로/심볼 - live-transport.ts nativeExecRedirectHint: cursorNativeExecRedirectHint(cursorVisibleTools) - 시스템 노트와 같은 visible catalog를 쓰므로 게이트가 맞습니다.
경로/심볼 - nativeShellDisabledMessage(hint?) - 힌트가 있으면 Windows PowerShell 교정 문단 전체를 힌트로 교체합니다. 위임 전용 카탈로그에는 셸 브리지가 없으니 맞는 선택입니다.
경로 CI / 본문 Verification - 작성자 로컬은 cursor native-exec 관련 104 pass, typecheck·structure·privacy 통과, full suite는 bwrap 호스트 한계로 pristine dev와 같은 2 fail이라고 적혀 있습니다. GitHub checks는 이 리뷰 시점에도 일부 pending/BLOCKED라 merge 게이트를 정해야 합니다.
경로/심볼 - #4542 - Fixes 링크가 본문·커밋에 있고, 재현·측정이 이슈와 같습니다. types/config 분리로 무효화되지 않습니다.

메인테이너의 판단이 필요한 지점

• 이 PR Cross-platform CI(test/gates/docker 등)가 초록이 될 때까지 기다릴지, 작성자 로컬 스위트·pristine dev 대비 동일 2 fail 설명을 merge 증거로 받아들일지
• JSDoc의 개인 패치 메모를 커밋으로 지운 뒤에만 merge할지
• code-mode 전용 카탈로그의 기본 거절 문장(셸 브리지 이름) follow-up을 이 PR에 넣을지, [Bug]: Cursor adapter native-exec refusal points to shell_command/exec_command even when the catalog has no shell tool; kimi-k3 abandons the turn instead of calling the listed client tools #4542 닫은 뒤 새 이슈로 뺄지
• merge 직후 #4542를 자동 close에 맡길지, cursor/kimi-k3 + tools=task only 한 번 더 손으로 확인할지

너의 추천
개인 패치 JSDoc 한 줄을 지우고, 이 PR checks가 초록이면 merge하라. 거절은 그대로 두고 문장만 카탈로그에 맞추며, gap-8 silent-redirect·시스템 노트 게이트와 같은 축이다. base는 dev 유지. types/config 분리와 무관하니 close-don't-rebase 대상이 아니다. code-mode 문장 수리는 이 PR에 넣지 말고 #4542 닫은 뒤 별도 이슈로 남겨라. 2.54.0 승격 열차(#4537/#4538 등)와 순서를 섞지 말고 dev에 단독으로 넣는 편이 안전하다.

이 댓글은 grok-bot이 작성했습니다

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Inline comments:
In `@src/adapters/cursor/native-exec.ts`:
- Around line 101-102: Update the Cursor provider guide’s tool-name
documentation to include namespaced MCP wire names produced by
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📒 Files selected for processing (7)

• src/adapters/cursor/live-transport.ts
• src/adapters/cursor/native-exec-fs.ts
• src/adapters/cursor/native-exec-network.ts
• src/adapters/cursor/native-exec-shell.ts
• src/adapters/cursor/native-exec.ts
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Inline comments:
In `@src/adapters/cursor/native-exec.ts`:
- Line 96: Update the empty-tool guard in cursorNativeExecRedirectHint to also
consider configured MCP definitions from execContext.mcpToolDefs before
returning undefined. Build names safely when the client tool catalog is
undefined, preserving the existing undefined fallback accepted by the
shell-alias and execution-path helpers, and ensure configured MCP tools still
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Inline comments:
In `@src/adapters/cursor/native-exec.ts`:
- Around line 93-109: Pass cursorRequestUsesCodeMode(cursorVisibleTools,
request.toolChoice) through LiveCursorTransport.run() into
cursorNativeExecRedirectHint(). Make cursorNativeExecRedirectHint() return
nested await tools.<name>(...) guidance for code-mode requests before
suppressing execution-path hints, while preserving the existing default behavior
for non-code-mode execution-path catalogs.

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[lidge-jun]

Superseded by c66709f, which carries this work onto dev.

Your change is in that commit with a Co-authored-by trailer naming you in a branch commit, so it survives the squash and reaches the contributor graph.

The carried version keeps your point exactly: the refusal should name the catalog the request actually has. It builds the hint from the real wire tool names — client tools, their namespaced forms, and configured MCP tools, capped at 16 — and only when the catalog has neither a shell alias nor an execution path, so a bridged catalog that really does expose a shell tool still produces byte-identical output. It was carried rather than merged directly because the same lane also fixed the data-policy surfacing in the same files.

Issue #4542 is closed against that merge. Thank you.