Read before writing or editing any agent-facing instructions โ an agent skill (SKILL.md and whatever it links to), a tool/function description, or an extension's injected context. Covers discoverability, information hierarchy, and token-lean design.
Strip dead code and useless comments from files touched this session, per house rules.
Standards review of the diff since a fixed point; Spec axis added only when a spec exists.
Compact the current conversation into a handoff document for another agent to pick up.