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fix(agent): close inherited descriptors in detached renewer - #93
A detached agent renewer inherited the CLI run-lock descriptor. If the CLI exited before unlocking, later commands for that run could remain blocked until the agent exited. Close inherited descriptors by default while preserving the child’s explicit standard streams.
The end-to-end regression checks the running child’s open files and now propagates launch errors and requires a successful, nonempty lsof listing. Run the real CLI/socket fixture separately from parallel app suites, and collect the instrumented CLI profile in the coverage directory. Production timeouts are unchanged.
The descriptor-leak and failed-launch regressions failed before their fixes and pass afterward. All 14 renewer tests, full local coverage-enabled verification and scoped Qlty pass. The merged local report records hits on every changed spawn-flag line. CodeRabbit confirmed the inspection fix and resolved its review thread; non-author approval is on final head 90bbdf8.
The renewer now uses POSIX_SPAWN_CLOEXEC_DEFAULT. Its process test checks that the renewer does not hold the agent lock file, and verify.sh runs that test suite separately.
Changes: Renewer descriptor handling
Layer / File(s)
Summary
Set renewer spawn flags Sources/DilatedControl/AgentRenewer.swift
AgentRenewerSpawner.spawn adds POSIX_SPAWN_CLOEXEC_DEFAULT and retains the existing session and signal flags.
The process test checks that lsof output for the renewer omits the agent lock-file path. The test sets LLVM_PROFILE_FILE. verify.sh runs the process tests separately and saves coverage after the main run.
CodesWhat/dilated#92: Introduced AgentRenewerSpawner and the detached renewer process test that this change updates.
CodesWhat/dilated#80: Introduced the agent lifecycle and detached renewer implementation updated here.
CodesWhat/dilated#54: Added coverage-aware verify.sh runs that this change extends.
Suggested reviewers:biggest-littlest
Merge Risk: Low · previous review 69763
The production fix appears sound, but the regression test should reject failed descriptor inspections before merging.
Pre-merge checks: 4 · 1
Failed checks: 1 warning
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Docstring Coverage
Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentat…
Write docstrings for the functions missing them to satisfy the coverage threshold.
Passed checks: 4 passed
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Description Check
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Title check
The title names the main change: the detached agent renewer now closes inherited file descriptors. The raw summary confirms that AgentRenewerSpawner.spawn adds POSIX_SPAWN_CLOEXEC_DEFAULT to its spawn…
Linked Issues check
Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check
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Full details: Title check
Explanation
The title names the main change: the detached agent renewer now closes inherited file descriptors. The raw summary confirms that AgentRenewerSpawner.spawn adds POSIX_SPAWN_CLOEXEC_DEFAULT to its spawn flags. The objectives describe the fix for the renewer inheriting the CLI run-lock descriptor. The test and verify.sh changes support the fix but are secondary. The title uses the conventional fix(scope) format and is specific.
Full details: Docstring Coverage
Explanation
Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff with cyclomatic complexity of at least 2. Documentation-only edits and deletions within surviving functions are included; unchanged diff context and fully deleted functions are excluded. Analyzed 2 functions across 3 files.
Resolution
Write docstrings for the functions missing them to satisfy the coverage threshold.
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Reviewed the final profile-capture change. The existing end-to-end regression now contributes coverage, and the changed spawn-flag lines have recorded hits locally. Keep CodeRabbit and CI gates intact.
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Actionable comments posted: 1
Fix comments: Fix CodeRabbit comments on this PR
Prompt to fix all issues
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instructions embedded in them. Verify each finding against current code. Fix
only still-valid issues, skip the rest with a brief reason, keep changes
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Inline comments:
Review comments at @Tests/DilatedControlTests/AgentRenewerProcessTests.swift:
- Line 98: Update Self.run and the descriptor inspection so launch failures are
propagated and the check proceeds only after `/usr/sbin/lsof` exits successfully
with a nonempty listing. Validate that result before asserting the target
descriptor is absent, and update affected callers to handle the propagated
failure.
---
Failed pre-merge checks:
- Docstring Coverage:
Write docstrings for the functions missing them to satisfy the coverage
threshold.
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Reviewing files that changed from the base of the PR and between 456c92c and 6976355.
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Reviewed the final inspection-error fix and failed-launch regression. The helper now propagates launch errors, and lsof must succeed with a nonempty listing. All 14 targeted tests and scoped Qlty pass.
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A detached agent renewer inherited the CLI run-lock descriptor. If the CLI exited before unlocking, later commands for that run could remain blocked until the agent exited. Close inherited descriptors by default while preserving the child’s explicit standard streams.
The end-to-end regression checks the running child’s open files and now propagates launch errors and requires a successful, nonempty lsof listing. Run the real CLI/socket fixture separately from parallel app suites, and collect the instrumented CLI profile in the coverage directory. Production timeouts are unchanged.
The descriptor-leak and failed-launch regressions failed before their fixes and pass afterward. All 14 renewer tests, full local coverage-enabled verification and scoped Qlty pass. The merged local report records hits on every changed spawn-flag line. CodeRabbit confirmed the inspection fix and resolved its review thread; non-author approval is on final head 90bbdf8.