fix(ci): avoid SIGPIPE in bump-platform-submodule first-line extraction

[NiveditJain]

Summary

• The Bump failproofai/oss gitlink and push step in .github/workflows/bump-platform-submodule.yml failed on the merge of feat(audit+auth): /audit dashboard, email-OTP auth (CLI + dashboard), SES-backed re-audit reminders, unified pixel-craft design system #397 with printf: write error: Broken pipe (run 27208748580), blocking the platform-submodule bump.
• Root cause: SUBJECT_LINE=$(printf '%s\n' "${COMMIT_SUBJECT:-Manual trigger}" | head -n 1) races under set -o pipefail. head -n 1 reads the first line and closes the pipe; printf then dies with SIGPIPE on the next write of the multi-KB squash-merge body; pipefail propagates the non-zero exit and set -e aborts.
• Fix: pure bash parameter expansion — no subprocess pipe, nothing for pipefail to fail on.

SUBJECT_LINE=${COMMIT_SUBJECT:-Manual trigger}
SUBJECT_LINE=${SUBJECT_LINE%%$'\n'*}

Test plan

• Verified the expansion on four inputs (multi-line, single-line, unset, empty) — each returns the correct first line / default fallback.
• yaml.safe_load parses the updated workflow.
• Verify on a real run: this workflow only triggers on push to main, so the next merge into main will exercise the fix.

🤖 Generated with Claude Code

Summary by CodeRabbit

• Bug Fixes
  • Improved reliability of internal platform synchronization processes to prevent potential workflow failures.

[coderabbitai]

Caution

Review failed

Pull request was closed or merged during review

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: 4202a731-3af8-4cc1-9ac3-3a870b1fe9c9

📥 Commits

Reviewing files that changed from the base of the PR and between 0feacb6 and c061cfe.

📒 Files selected for processing (2)

• .github/workflows/bump-platform-submodule.yml
• CHANGELOG.md

---

📝 Walkthrough

Walkthrough

The PR fixes a broken-pipe failure in the bump-platform-submodule workflow by replacing a printf | head -n 1 pipeline with pure bash parameter expansion for extracting the commit subject line. The changelog documents this correction.

Changes

Bump Workflow Broken Pipe Fix

Layer / File(s)	Summary
Subject line extraction fix and changelog .github/workflows/bump-platform-submodule.yml, CHANGELOG.md	Subject-line extraction now uses bash parameter expansion (defaulting COMMIT_SUBJECT to Manual trigger and truncating at first newline) instead of printf piped to head, eliminating broken-pipe failures under set -euo pipefail. Changelog documents this specific fix.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

Possibly related PRs

• FailproofAI/failproofai#394: Prior work on the bump-platform-submodule workflow that established the subject-line extraction logic now being fixed.

Poem

A pipeline burst in the dark of night,
But bash expansion set things right,
No more SIGPIPE to break the spell—
Parameter tricks work just as well! 🐰✨

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 inconclusive)

Check name	Status	Explanation	Resolution
Description check	❓ Inconclusive	The description is comprehensive and includes the problem statement, root cause analysis, solution, and test plan, but does not follow the required template structure with Type of Change and Checklist sections.	Restructure the description to follow the template with Type of Change (Bug fix) and Checklist sections to ensure consistency with repository standards.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly and specifically describes the main change: fixing a SIGPIPE issue in the bump-platform-submodule workflow's first-line extraction logic.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
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.

_{✏️ Tip: You can configure your own custom pre-merge checks in the settings.}

---

Thanks for using CodeRabbit! It's free for OSS, and your support helps us grow. If you like it, consider giving us a shout-out.

❤️ Share

• X
• Mastodon
• Reddit
• LinkedIn

_{Comment @coderabbitai help to get the list of available commands and usage tips.}