bookSiYi1412

TRIGGER when: user requests implementation work, repo exploration, data/log inspection, broad codebase search, impact analysis, verification-heavy shell work, or explicitly mentions Codex ("用 codex 做", "让 codex 执行", "ask codex to...", "use codex", "delegate to codex"). Also trigger for heavy internal subtasks that Claude Code might otherwise offload to a lightweight model/Haiku. DO NOT TRIGGER when the task is primarily user-facing product judgment, architecture choice, git/PR/release operations, or requires multi-turn clarification before useful work can begin. This skill routes work between Claude Code (decision-maker/reviewer) and Codex CLI (autonomous explorer/implementer), with automatic Codex-first delegation for heavyweight repository/data investigation.