fix(advisor): retain sandbox entrypoint by cjagwani · Pull Request #11599 · NVIDIA/NemoClaw

cjagwani · 2026-09-11T22:33:20Z

Outcome

PR Review Advisor sandboxes keep their trusted entrypoint alive until OpenShell terminates the sandbox, so the supervisor exec relay remains available for the specialist session.

Reason

OpenShell v0.0.116 tears down the supervisor session when the configured entrypoint exits. The Advisor entrypoint initialized its runtime and returned immediately, racing every later sandbox exec and causing repeated 0/9 specialist failures before review began.

Related issues

Part of #10791

Changes

Wait for SIGTERM or SIGINT after sandbox runtime initialization instead of exiting the entrypoint.
Remove both signal listeners during shutdown.
Add focused regressions proving initialization completes while the entrypoint remains alive until either supported OpenShell termination signal.

Verification

npx vitest run test/automation/pull-requests/pr-review-advisor-openshell.test.ts — 46/46 passed
NODE_OPTIONS=--max-old-space-size=8192 npm run validate:pr — passed after merging current main
Exact-head CI run 34655855329 — passed
CodeRabbit incremental review — passed; its SIGINT coverage thread is fixed and resolved
Documentation-writer review — no documentation change required because commands, configuration, review semantics, and the security boundary are unchanged
GitHub commit verification — all branch commits through 21840fbb575aeab6f746b54b96a1fab1c1d498ef are Verified
Diff inspection — no secrets, API keys, or credentials

Review notes

The local prek executable was unavailable, so commit and push hooks could not execute directly. The focused regression and repository validate:pr gate were run manually and passed before publication.

Advisor run 34656803483 cannot self-host this repair: by design it executes the trusted Advisor runtime from base commit 49fea6a4dcdd9c008398a69f88eabb3d35847690, not the PR head. All nine jobs therefore reproduced the base runtime's exec relay closed failure before specialists ran and uploaded no artifacts. After independent merge, downstream lifecycle PR #11047 will provide the current-main 9/9 live proof.

Signed-off-by: Charan Jagwani cjagwani@nvidia.com

Signed-off-by: Charan Jagwani <cjagwani@nvidia.com>

copy-pr-bot · 2026-09-11T22:33:24Z

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coderabbitai · 2026-09-11T22:33:38Z

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📒 Files selected for processing (1)

test/automation/pull-requests/pr-review-advisor-openshell.test.ts

🚧 Files skipped from review as they are similar to previous changes (1)

test/automation/pull-requests/pr-review-advisor-openshell.test.ts

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📝 Walkthrough

Walkthrough

OpenShell advisor execution is now asynchronous. It waits for sandbox termination through SIGINT or SIGTERM, removes signal listeners, and awaits command completion at the CLI entry point. Tests cover termination behavior and asynchronous unsupported-command rejection.

Changes

OpenShell termination handling

Layer / File(s)	Summary
Implement termination waiting `tools/pr-review-advisor/openshell.mts`	`runOpenShellAdvisorCommand` returns a promise, waits for sandbox termination, cleans up signal listeners, and is awaited by the CLI entry point.
Validate asynchronous behavior `test/automation/pull-requests/pr-review-advisor-openshell.test.ts`	Tests cover SIGTERM and SIGINT, listener cleanup, pending initialization, and asynchronous rejection for unsupported commands.

Priority: ⬇️ Low

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

Change: Bug fix

Suggested reviewers: cv

Sequence Diagram(s)

sequenceDiagram
  participant CLI
  participant runOpenShellAdvisorCommand
  participant initialize
  participant waitForAdvisorSandboxTermination
  CLI->>runOpenShellAdvisorCommand: await command execution
  runOpenShellAdvisorCommand->>initialize: run initialization
  runOpenShellAdvisorCommand->>waitForAdvisorSandboxTermination: wait for termination
  waitForAdvisorSandboxTermination-->>runOpenShellAdvisorCommand: resolve on SIGINT or SIGTERM
  runOpenShellAdvisorCommand-->>CLI: complete

Merge Risk: ⚪ Minimal · up to 21840

The termination-wait behavior has no unresolved merge-blocking issues identified; the change is ready to merge.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 4 functions across 2 files.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main change: keeping the Advisor sandbox entrypoint alive during sandbox execution.

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github-code-quality · 2026-09-11T22:34:31Z

Code Coverage Overview

Languages: TypeScript

TypeScript / code-coverage/plugin

The overall line coverage in commit 21840fb in the codex/fix-advisor-en... branch remains at 96%, unchanged from commit 49fea6a in the main branch.

TypeScript / code-coverage/cli

The overall line coverage in commit 21840fb in the codex/fix-advisor-en... branch remains at 83%, unchanged from commit 49fea6a in the main branch.

Show a line coverage summary of the most impacted files.

File	`main` 49fea6a	`codex/fix-advisor-en...` 21840fb	+/-
`src/lib/sandbox...rce-identity.ts`	82%	82%	0%
`src/lib/onboard...uild-context.ts`	74%	75%	+1%

_{Updated September 11, 2026 23:06 UTC}

cjagwani · 2026-09-11T22:40:21Z

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coderabbitai · 2026-09-11T22:40:26Z

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Actionable comments posted: 1

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Inline comments:
In `@test/automation/pull-requests/pr-review-advisor-openshell.test.ts`:
- Line 544: Extend the test around the existing signals.emit("SIGTERM")
lifecycle assertions to also exercise SIGINT, reusing the same observable
shutdown expectations for both supported termination signals without asserting
listener implementation details.

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test/automation/pull-requests/pr-review-advisor-openshell.test.ts
tools/pr-review-advisor/openshell.mts

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Signed-off-by: Charan Jagwani <cjagwani@nvidia.com>

cjagwani · 2026-09-11T22:53:45Z

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coderabbitai · 2026-09-11T22:53:51Z

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## Outcome The Advisor sandbox initializer keeps its real Node process alive until OpenShell sends `SIGTERM` or `SIGINT`. The supervisor relay no longer closes merely because no active event-loop handle remains after initialization. ## Reason Post-merge Advisor run 34658298309 used the #11599 code from current `main`, but all nine specialists still stopped before review with `exec relay closed before the command reported an exit status`. An unresolved promise plus signal listeners does not keep a Node process alive when no active handles remain, so the initializer still exited immediately. ### Related issues Part of #10791 ## Changes - Hold one active timer handle for the initializer lifetime and release it when OpenShell terminates the process. - Add a real subprocess regression that fails when Node exits with an unsettled termination promise and passes only when the entrypoint remains alive through `SIGTERM`. ## Verification - `npx vitest run test/automation/pull-requests/pr-review-advisor-openshell.test.ts --testTimeout=60000` — 47 tests passed after formatting. - Pre-commit hooks — passed. - `NODE_OPTIONS=--max-old-space-size=8192` pre-push TypeScript checks — passed after building the plugin artifact required by the local checkout. - GitHub commit verification — commit `566e6be05dc4e17f11d92bae035878b1e48886f0` is Verified. - Diff inspection — no secrets, API keys, or credentials. ## Review notes This fixes the entrypoint-lifetime defect exposed after #11599 merged. PR #11596 separately owns the pinned OpenShell 0.0.116 `sandbox exec` command compatibility change; the two root causes remain separate. --- Signed-off-by: Apurv Kumaria <akumaria@nvidia.com>  ## Summary by CodeRabbit - **Bug Fixes** - Improved sandbox termination handling so the process remains active while waiting for OpenShell to stop the sandbox. - Added cleanup when termination signals are received, allowing shutdown to complete without lingering activity or errors. - **Tests** - Added integration coverage verifying timeout-based termination behavior in a real Node.js process.  Signed-off-by: Apurv Kumaria <akumaria@nvidia.com>

fix(advisor): retain sandbox entrypoint

77b6d7a

Signed-off-by: Charan Jagwani <cjagwani@nvidia.com>

coderabbitai Bot reviewed Sep 11, 2026

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Comment thread test/automation/pull-requests/pr-review-advisor-openshell.test.ts Outdated

cjagwani added 2 commits September 11, 2026 15:50

test(advisor): cover interrupt shutdown

decdd94

Signed-off-by: Charan Jagwani <cjagwani@nvidia.com>

merge(main): refresh Advisor entrypoint repair

21840fb

cjagwani marked this pull request as ready for review September 11, 2026 23:11

apurvvkumaria approved these changes Sep 11, 2026

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apurvvkumaria merged commit 4eaa7c1 into main Sep 11, 2026
89 checks passed

apurvvkumaria deleted the codex/fix-advisor-entrypoint-lifetime branch September 11, 2026 23:26

github-actions Bot added the v0.0.124 Release target label Sep 11, 2026

apurvvkumaria mentioned this pull request Sep 11, 2026

fix(advisor): keep sandbox entrypoint process alive #11605

Merged

rsliter mentioned this pull request Sep 12, 2026

test(e2e): reduce EXDEV live boundary scope #11588

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fix(advisor): retain sandbox entrypoint - #11599

fix(advisor): retain sandbox entrypoint#11599
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