learn — append to the cross-session notebook

KinClaw's persistence layer for Genesis Protocol. Every successful task or hard-won failure is an opportunity to make next session smarter. This skill is the standardized way to write into ~/.kinclaw/learned.md — kernel auto-loads that file at boot and injects it into the agent's system prompt. (Until v1.18 this skill wrote to ~/.localkin/learned.md while the kernel read ~/.kinclaw/ — the kernel still reads the old file so nothing written there is lost.)

Idempotent

Calling learn with the same topic + note twice is a no-op. Safe to spam without polluting the notebook.

Examples

learn topic=com.apple.calculator note="AX tree depth ≥ 6 to see number buttons"
learn topic=com.apple.Notes note="cmd+N more reliable than ui click 'New Note'"
learn topic=com.apple.reminders note="ui click description='Add Reminder' fails with AXError -25205; use cmd+N + type"
learn topic="Common: focus protection" note="osascript activate from Terminal-driven KinClaw rarely takes frontmost"
learn action=list
learn action=recall topic=com.apple.Notes

Why a SKILL.md and not native

Pure shell + awk. No Go state. The notebook lives at a known path that the kernel already reads — this skill is just an idempotent append helper. Nothing here belongs in the kernel.