Lamarck

Lamarckian skill evolution - monitors every real skill invocation, drives governed evolution of observed skills, and evolves itself by the same rules while running. Harness-agnostic (adapters for Claude Code, Codex, Cursor, pi share one ledger); in the reference adapter a PostToolUse hook logs each invocation (stamped with the skill's genome hash for per-version regression windows) and a Stop hook queues a light evaluation loop that runs backstage in a headless CLI (or inline), never reloading this file. Per-skill dynamic rubrics (git-versioned) define what "good" means per skill; a trust ladd

13 stars 2 forksSoftware Development

Install

skills CLI (Claude Code, Cursor, Codex and more)

npx skills add newdee/lamarck-skill --skill lamarck

Manual install

git clone --depth 1 https://github.com/newdee/lamarck-skill.git /tmp/lamarck-skill
mkdir -p ~/.claude/skills
cp -r /tmp/lamarck-skill/. ~/.claude/skills/lamarck

Personal skills live in ~/.claude/skills. Use .claude/skills in a project folder to share a skill with your team.

From the SKILL.md

# lamarck:用进废退的 skill 进化

拉马克式进化:skill 在**真实使用**中获得的经验,写回它的"基因"(SKILL.md);
衡量它的**尺子(rubric)也随之进化**;长期无用的部分**废退**(修剪)。
赛道:SkillOpt 是训练场(基准分数驱动),darwin-skill 是考场(合成测试+评委),
lamarck 是生活——生产遥测驱动,用进 + 废退双向。三层机制,重活分级触发:

- **记账**(自动,每次 Skill 调用,所有模式下都开):PostToolUse hook 写 `data/pending.jsonl`。
- **轻循环**(回合末,**不加载本文件**):协议文本单源于 `protocol/light-loop.md`
  (harness 无关,任何适配器逐字注入,见 `protocol/adapter-contract.md`),
  Claude Code 适配器由 Stop hook 运行时读入拼进 reason——
  对照该 skill rubric 中场景匹配的条目做四维评估落 `data/ledger.jsonl`、用户纠正
  n=1 结晶进 `data/rubrics/<skill>.md`、经验沉淀进 `data/learnings/<skill>.md`、
  蒸馏回归用例进 `data/replays/<skill>.jsonl`、清本会话 pending;他会话积压达阈值
  时提示用户手动清算(指针会衰减,静默积压等于丢证据)。**在哪跑**由
  `config.json` 的 `isolation` 决定:`background`(默认)——Stop hook **不阻塞
  回合、不注入任何文字**,只往 `data/jobs.jsonl` 写一条 `evaluate` job 并拉起
  后台 worker,由本 harness 的无头 CLI 在会话外执行同一协议(证据来自磁盘上
  的 transcript,客观信号由 hook 算好随 job 带走),结果写 `data/inbox.md`,
  只有"需要用户"(出了提案 / 结晶了纠正 / 失败)才发系统通知;无头跑不能提
  问,过门提案一律落 `suggestions/`,auto 级由它自己入队 evolve job。找不到
  无头 CLI 时 worker 留 `data/.no-runner` 标记,hook 自动退回 `inline`,一天后
  重试。**无头写入**:Claude Code 把 `~/.claude` 整个视为受保护路径,无头模式
  下 Write/Edit 工具一律拒绝(allow 规则与 acceptEdits 都不解除),所以后台
  agent 的全部写入走 `node scripts/store.js`(append / write / edit /
  pending-drop)——它把围栏(只许 lamarck 目录与 skills 目录,禁 scripts/
  adapters/ bin/ config.json .git)和有界编辑(≤3 处、每处 ≤10 行、原文唯一)
  变成代码执法,比交给模型自觉更紧。`subagent`——评估派一个子代理在本会话内执行,主上下文只收一行;
  `inline`——协议注入本回合上下文,零额外模型调用但协议进主上下文。所有注入

Read the full skill on GitHub

Details

Skill name: lamarck
Repository: newdee/lamarck-skill
License: MIT
Repo updated: 20 October 2026

FAQ

What does the Lamarck skill do?

How do I install the Lamarck skill?

skills CLI (Claude Code, Cursor, Codex and more): npx skills add newdee/lamarck-skill --skill lamarck. Skills go in ~/.claude/skills (personal) or .claude/skills (project), and Claude loads them automatically when a task matches the description.

Is Lamarck popular?

It lives in newdee/lamarck-skill, which has 13 GitHub stars and 2 forks.

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