#skills

An inspected agent configuration shared by Claude Code and Codex: immutable releases, 4 execution layers, BM25 skill routing and the gaps found. Full report to read online.

Claude Code selected flow-lean but skipped its footer. A casing fix showed why installation, selection, and behavior need separate evidence.

Flow Lean fused three response skills. Its historical eval beat each comparator and caught a candidate offering a migration against an inferred target.

Three configuration layers for project context, daily tools and persistent memory, with checks for what loads and how it behaves.

The concepts I wish I’d known before week one: the agent loop, instruction scopes, context management, skill invocation, hooks, and client permission checks.