[bug-hunter] extract-log-errors.py flags warning-only logs as failures

[github-actions]

Impact

/scripts/extract-log-errors.py reports warning-only logs as failures, which creates false-positive failure reports for agent workflows that consume its JSON output.

Reproduction Steps

1. Create a minimal warning-only log:

   cat > /tmp/gh-aw/agent/repro-warning-only.log <<'EOF'
   2026-02-24T00:00:00Z ##[warning] just a warning
   EOF

2. Run this new minimal test:

   python3 /tmp/gh-aw/agent/test_extract_warning.py

Expected vs Actual

Expected: warning-only logs should produce total_matches == 0 because the script is documented to extract errors/failures.

Actual: the test fails with:

AssertionError: {'total_files_scanned': 1, 'total_matches': 1, 'matches': [{'file': '/tmp/gh-aw/agent/repro-warning-only.log', 'start_line': 1, 'end_line': 1, 'snippet': '2026-02-24T00:00:00Z ##[warning] just a warning'}]}

Failing Test

import json
import subprocess
from pathlib import Path

log = Path('/tmp/gh-aw/agent/repro-warning-only.log')
log.write_text('2026-02-24T00:00:00Z ##[warning] just a warning\n', encoding='utf-8')

result = subprocess.run(
    ['python3', 'scripts/extract-log-errors.py', str(log)],
    cwd='/home/runner/work/ai-github-actions/ai-github-actions',
    check=True,
    text=True,
    capture_output=True,
)

summary = json.loads(result.stdout)
assert summary['total_matches'] == 0, summary

Evidence

• The script is described as extracting errors/failures in scripts/extract-log-errors.py:3-6 and scripts/extract-log-errors.py:17-21.
• DEFAULT_PATTERNS currently includes warnings (r"##\[warning\]") at scripts/extract-log-errors.py:33, which causes warning-only logs to be classified as matches.
• git blame shows this behavior was introduced in commit 29f5c201890049e7acc8ece895a336733d90df5d.

---

What is this? | From workflow: Bug Hunter

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• expires on Mar 3, 2026, 11:27 AM UTC

[github-actions]

This issue was automatically closed because it expired on 2026-03-03T11:27:56.860Z.

Closed by Workflow