Research

Two halves, in this order: the documents of record for this project, then prior art outside it. Answering from memory and calling it research is the thing this skill is here to stop.

Match the shape of the ask:

• A question ("is this possible", "are we doing this right", "don't touch code"): look it up, report, stop. No edits until told to go (→ audit-only).
• Part of the work ("research and fix", "sleuth GitHub and iterate until it's right"): research inside the loop. Look, apply, re-check, and say what each pass was based on — don't halt the loop to file a report.

Pick a depth and say it