Function collectWaveSignals

hooks_src/post-tool-batch.js:86–125

* Read the last 20 hook-timing entries and surface anything from the * last 30 seconds that Claude should know about. * * Surfaces: * - Typecheck failures from post-edit (exits 2) in this wave * - Large wave size (>3 files modified) as a summary

()

 *   - Large wave size (>3 files modified) as a summary
 */
function collectWaveSignals() {
  const signals = [];

  try {
    const timingPath = path.join(PROJECT_ROOT, '.planning', 'telemetry', 'hook-timing.jsonl');
    if (!fs.existsSync(timingPath)) return signals;

    const lines = fs.readFileSync(timingPath, 'utf8')
      .split('\n')
      .filter(Boolean)
      .slice(-20);

    const recentEdits = new Set();
    const now = Date.now();
    const WAVE_WINDOW_MS = 30000;

    for (const line of lines) {
      try {
        const entry = JSON.parse(line);
        if (entry.hook !== 'post-edit') continue;
        const entryTime = new Date(entry.timestamp).getTime();
        if (now - entryTime > WAVE_WINDOW_MS) continue;

        if (entry.file) recentEdits.add(entry.file);

        if (entry.typecheck === 'fail') {
          signals.push(`typecheck: FAIL in ${entry.file}`);
        }
      } catch { continue; }
    }

    if (recentEdits.size > 3) {
      const fileList = [...recentEdits].slice(0, 3).join(', ');
      const overflow = recentEdits.size > 3 ? ` (+${recentEdits.size - 3} more)` : '';
      signals.push(`wave: ${recentEdits.size} files modified — ${fileList}${overflow}`);
    }
  } catch { /* fail-safe: never block */ }

  return signals;
}

main();