<Concise PR title>

<Why and what changed; check this is the actual final squash message.>

AI-Provider: <provider actually involved>
AI-Tool: <tool actually involved, if known>
AI-Mode: AI-Assisted

Remove the AI-* block when no AI participated. For multiple actors, repeat
AI-Provider without a blank line inside the trailer block. Preserve one blank
line before the first trailer. This file is a human-edited template, not an
automatic assertion about AI usage.
