docs(#4531): correct comment references from EnsureAvailable to CheckGateway

[fullsend-ai-coder]

Update three comments introduced in PR #2986 that incorrectly reference sandbox.EnsureAvailable as the failure point for the useFakeOpenshell stub. The stub is found by exec.LookPath in EnsureAvailable (which succeeds), but the actual test failure occurs at sandbox.CheckGateway, which runs "openshell gateway list" and gets exit code 1 from the stub.

Changed locations:

• useFakeOpenshell docstring in run_test.go
• TestRunAgent_HarnessLoadPipeline comment in run_test.go
• testdata/openshell stub file comment

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Closes #4531

Post-script verification

• Branch is not main/master (agent/4531-fix-comment-checkgateway)
• Secret scan passed (gitleaks — f398c1f4eabdb445f2e8edccc6cffca3db7ed907..HEAD)
• Pre-commit hooks passed (authoritative run on runner)
• Tests ran inside sandbox

[github-actions]

E2E tests are running

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.

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[ralphbean]

/fs-review

[fullsend-ai-review]

🤖 Finished Review · ✅ Success · Started 5:06 PM UTC · Completed 5:12 PM UTC
Commit: bd28f41 · View workflow run →

[fullsend-ai-review]

Looks good to me

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Labels: Comment-only correction of sandbox function references in CLI test files.

[fullsend-ai-retro]

🤖 Finished Retro · ✅ Success · Started 7:14 AM UTC · Completed 7:27 AM UTC
Commit: bed0ce7 · View workflow run →

[fullsend-ai-retro]

Retro: PR #4533 — correct comment references from EnsureAvailable to CheckGateway

Timeline

1. PR chore(test): mock openshell in TestRunAgent_* to prevent hangs #2986 merged Jul 13 14:38 UTC — added useFakeOpenshell(t) to prevent test hangs, but left inaccurate comments referencing sandbox.EnsureAvailable instead of sandbox.CheckGateway
2. Retro agent on PR chore(test): mock openshell in TestRunAgent_* to prevent hangs #2986 identified the inaccuracy and created issue Fix inaccurate comments in run_test.go referencing sandbox.EnsureAvailable instead of sandbox.CheckGateway #4531 (with ready-to-code label)
3. Code agent implemented the fix and opened PR docs(#4531): correct comment references from EnsureAvailable to CheckGateway #4533 at 15:05 UTC — 4 additions, 4 deletions across 2 files
4. ready-for-review label applied at 15:05:50 UTC, but no automated review dispatched (known issue #3996)
5. Human (ralphbean) manually triggered /fs-review at 17:05 UTC — 2 hours after PR creation
6. Review agent approved at 17:12 UTC: "Looks good to me"
7. Human (rh-hemartin) approved at 07:03 UTC next day, merged at 07:12 UTC

Assessment

What went well: The retro→code→review pipeline worked correctly end-to-end. The code agent's fix was precise — it updated exactly the 3 comments specified in the issue, correctly changing EnsureAvailable to CheckGateway. The review agent's approval was appropriate for a trivial comment-only change. Zero rework iterations needed.

What could go better:

1. Review auto-trigger gap (existing issue): The ready-for-review label did not trigger an automated review, adding ~2 hours of latency until a human intervened with /fs-review. This is tracked by #3996, which documents that pull_request_target.types is missing labeled, so the label-based handoff from code→review never fires. PR docs(#4531): correct comment references from EnsureAvailable to CheckGateway #4533 is another data point confirming this pattern.

2. Remaining stale function name references: The docs reference EnsureGateway() in 3 locations, but this function does not exist — the actual function is CheckGateway(). This is the same class of issue that Fix inaccurate comments in run_test.go referencing sandbox.EnsureAvailable instead of sandbox.CheckGateway #4531 addressed (stale sandbox function name references) and was not caught by either the code agent or the review agent. No existing issue covers this; proposing below.

Skipped proposals

• Review trigger fix: Already covered by open issue #3996 (state: ready-to-code). PR docs(#4531): correct comment references from EnsureAvailable to CheckGateway #4533 provides additional confirming evidence.

Proposals filed

• Fix stale EnsureGateway references in docs — function is CheckGateway (in fullsend-ai/fullsend)