Agent Skills: codify-context

Codify knowledge from the current session into the right layer of the context architecture (GC, a repo CLAUDE.md, a path scoped rule, a skill's learned rules, a hook, a tool doc, or auto memory), routing by trigger and admitting to always loaded files only through the placement tests. Use this skill whenever the user says "codify" followed by a topic, wants to capture something they just figured out, asks to document a pattern or convention, or says something like "we should write this down" or "future me needs to know this." Also trigger when the user discovers a gotcha, foot gun, or non obvious behavior worth preserving. Named after the "plan, delegate, assess, codify" Level 4 compounding loop. This is the write in counterpart to `assist:groom-context`, which audits and prunes the same context architecture.