Function diffDiagnostics

src/agent/verification.ts:79–93

(baseline: Diagnostic[], current: Diagnostic[])

  return `${d.file}|${d.code ?? ''}|${d.message.trim().toLowerCase()}`;
}
export function diffDiagnostics(baseline: Diagnostic[], current: Diagnostic[]): Diagnostic[] {
  const counts = new Map<string, number>();
  for (const d of baseline) {
    const s = diagSignature(d);
    counts.set(s, (counts.get(s) ?? 0) + 1);
  }
  const fresh: Diagnostic[] = [];
  for (const d of current) {
    const s = diagSignature(d);
    const remaining = counts.get(s) ?? 0;
    if (remaining > 0) counts.set(s, remaining - 1); // consume a pre-existing occurrence
    else fresh.push(d);                              // genuinely new
  }
  return fresh;
}

/** Build the corrective message fed back to the model when touched files don't compile.
 *  Pure. `attempt`/`max` let the wording escalate. */