Conciseness

The body is lean and operational throughout — e.g. "Always call it as `command codex` / `command claude` (bypasses shell aliases that add unsafe flags)" packs a non-obvious safety rationale into one line, and there is no padding or explanation of concepts Claude already knows. Every line is either a runnable command, an environment-specific fact ("Host execution only works when the agent owner is talking to you"), or a behavioral directive.

Actionability

Fully executable, copy-paste-ready commands cover every common case: the exact Codex invocation ("command codex exec -s workspace-write --skip-git-repo-check --json -o .codex-last.md"), Claude Code invocation, image retrieval ("cp "${CODEX_HOME:-$HOME/.codex}/generated_images/<thread_id>/"*.png ./cat.png"), resume/follow-up syntax, and worktree isolation with concrete git commands. Placeholders (<request>, <thread_id>) are clearly signaled and sourced ("thread_id comes from the thread.started event above").

Workflow Clarity

Both flows are clearly sequenced with explicit validation and error recovery: the default path checks exit codes and `is_error` ("If the exit code is non-zero, show the user the last lines of .codex-stderr.log"), and the repo flow numbers steps 1–4 including "Verify yourself: `git -C "$WT" status --short && git -C "$WT" diff --stat`, and run the tests if it claims they pass" plus a bounded feedback loop ("resume the same session with concrete feedback (at most two rounds)"). The destructive repo-modification case includes validation, so no cap applies.

Progressive Disclosure

No bundle files exist and the body references none; the single file (~95 lines) is organized into clear sections ("Default: one call, then reply", Codex/Claude Code subsections, "Changing code in a repository") with all content being core operational material that belongs inline. Navigation is easy and nothing that should be separate is inlined.

Specificity

"Hand a task to the Codex CLI or Claude Code CLI installed on this machine and relay the result" states the concrete core actions, and the enumerated tasks — "draw or generate an image, write or fix code, explain a repo, answer a question" — give comprehensive, specific coverage of what the delegated agent handles. It clearly exceeds the several-specific-actions-with-minor-gaps level (4).

Completeness

Both questions are answered explicitly: the "what" ("Hand a task to the Codex CLI or Claude Code CLI ... and relay the result") and an explicit "Use when the user says to have / ask / tell 'codex', 'claude code', 'cc' or a coding agent do something" trigger clause with concrete trigger phrases. This is a direct match for the top anchor.

Trigger Term Quality

Natural trigger coverage is comprehensive: the exact names users would say ("codex", "claude code"), the synonym "cc", the generic phrase "a coding agent", and natural request verbs ("have / ask / tell ... do something") with concrete task phrasings like "draw or generate an image". This matches the anchor's standard of synonyms plus natural phrasing.

Distinctiveness Conflict Risk

It carves out a clear niche (host-installed agent CLIs) and actively disambiguates: "These are command-line programs on the host, not FastClaw agents, so never use message_agent for them" — explicitly steering away from the most likely wrong-skill trigger. Minimal conflict risk.