The thread through a brownfield maze — use-case trees so coding agents stop rediscovering the same flows.
Skill Claude CodeCodex
Compile use-case trees into docs/hops.md: Input → Branches → Output. Use when hops.md is missing or stale, the user asks to map a flow, an event is a different use case, or traces break across async calls.
Skill Claude CodeCodex
Walk one path on a use-case tree in docs/hops.md: Input → matching Branches → Output. Default cheap path. Use when implementing or debugging a known flow — not when mapping a new one.
Skill Claude CodeCodex
One turn of the use-case coverage loop. Measure score, research the named P0, capture, measure again. Use when mapping how services connect, /research, /loop, else/missing next, or improving hops until reflected.