How to author, edit, and adapt PostHog Signals scouts — the scheduled agents that scan a project and write reports into the Signals inbox. Use to customize a canonical scout (narrow its scope, retune thresholds, add disqualifiers), tweak a scout's schedule or dry-run posture, write a new scout for a surface the fleet doesn't cover, build a measurement scout that records structured output (an LLM-judge scoring a sample on a schedule — a custom metric no query can compute), or steer a scout without editing it by leaving it a note. Covers the scout SKILL.md anatomy, the report contract, the structured-output channel, the dedupe + scratchpad-memory conventions, scout notes, the per-team skills-store path vs the canonical in-repo path, and the test loop. Trigger on "write/edit/customize a signals scout", "new scout for X", "tune my scout schedule", "make a scout that watches <event>", "score/judge/measure X with a scout", "structured output from a scout", "leave a note for / give feedback to a scout".