The body is dense and jargon-tight—diagrams, tables, and tagged metrics ([measured]/[soft]) with no padding or explanation of concepts Claude already knows; not level 2 because there is no unnecessary explanation to trim, every section serves a distinct function.

The 工具入口 section gives real, copy-paste-ready commands (runner.py/optimize.py/regression.py/bump_version.py) with explained placeholders and flags, all referencing verified bundle scripts; not level 2 because the code is executable rather than pseudocode.

The Stage 状态机 table sequences steps by repo fact, with explicit validation gates (git-commit-before-LLM provenance, --dry-run cost guard, V_instance∧V_meta convergence, --confirm on budget breach) and a keep/kill feedback loop; not level 2 because checkpoints are explicit, not implicit.

SKILL.md is an overview that stage-gates thick rules into one-level-deep, verified references (references/{author,eval,optimize,release,autonomy}/protocol.md) with a 'load only on entering the stage' instruction; not level 2 because references are well-signaled and appropriately split, not inlined or nested.

Lists multiple concrete actions—"写/改一个 cs skill、评测 skill 效果、跨 model/agent 量化、优化 skill 提示词、把收敛结论固化回 skill"—matching the 'lists multiple specific concrete actions' anchor; not the level-2 anchor because the action set is comprehensive rather than partial.

Answers both 'what' (工程化闭环入口 orchestrating author/eval/optimize/release) and 'when' via the explicit "触发：" clause; not level 2 because the trigger guidance is explicit, not merely implied.

An explicit "触发：" clause surfaces natural phrases a CodeStable user would say (写/改 skill、评测 skill 效果、优化提示词、固化结论), giving good coverage; not level 2 because common variations are present rather than missing.

Scoped to the CodeStable skill lifecycle with distinct stage triggers (author/eval/optimize/release), making conflict with other skills unlikely; not level 2 because the niche is clearly bounded rather than overlapping.