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lean-and-mean

v3.1.0

Concise prose, YAGNI code, and session handoffs in CLAUDE.md or AGENTS.md.

CodexClaude Code3 Skills

By Spinlock DevelopmentLicense: MIT0 GitHub starsUpdated 1 hour ago

Directory evidence

Runtimes
Codex and Claude Code
Parsed components
3 skill or MCP entries
Source updated
Sep 28, 2026
Manifest status
Canonical path parsed

The directory validates manifest shape and source location. It does not execute the plugin or provide a security endorsement. Review the indexing methodology →

Install lean-and-mean for Codex and Claude Code

Installs for the current user
codex plugin marketplace add IchenDEV/agent-plugin-mkt
codex plugin marketplace upgrade agent-plugin-marketplace
codex plugin add lean-and-mean@agent-plugin-marketplace

Paste and run these commands in a terminal with Codex. They add and refresh the PluginsMP catalog, then install this plugin.

The installer fetches third-party code from the source repository shown on this page. This directory validates manifest structure and source location, but does not perform a security audit; review the manifest, components, and source before installing.

Get the source manually
git clone https://github.com/spinlockdevelopment/lean-and-mean

Clone the source repository, then follow its setup instructions to add the plugin to a compatible client. The repository root is the plugin root.

Plugin files

lean-and-mean/
├── .codex-plugin/plugin.json
├── .claude-plugin/plugin.json
├── skills/endsession/SKILL.md
├── skills/lean-and-mean/SKILL.md
└── skills/typesafe-ai/SKILL.md

Included Skills3

endsessionskills/endsession/SKILL.md

Close the session. Offers to commit, writes Rules, Next and Todo into the context file, flags a full review if needed, prints a plain summary, stops. Hard stop — final message, no follow-ups. User-invoked only.

lean-and-meanskills/lean-and-mean/SKILL.md

Concise prose + YAGNI code, installed into the project's context file so it runs without help. Owns the context file (structure, 250-line cap, Rules, Next, Todo). `/lean-and-mean` creates or reviews the context file, idempotent; runs on its own when the SessionStart hook asks. `/lean-and-mean debt` lists `// lean:` markers. Trigger: "lean and mean", "lean mode", "yagni", "be terse", "set up claude.md", "review claude.md", "clean up claude.md", "set up agents.md", "review agents.md", "context files". Do NOT compress requests needing full prose (reports, readable docs).

typesafe-aiskills/typesafe-ai/SKILL.md

Build AI-powered software with TypeSafe: small units of AI intelligence you can use like programming primitives. Its System One models, including Jev, turn natural language and application state into typed judgments and probabilities that code can combine. Use when a feature needs programmable common sense, when brainstorming what AI could make possible in an app, or when an LLM prompt-and-parse step could become a structured decision. Applications include routing, ranking, extraction, verification, and interactive experiences; these are starting points, not the limits. Read live docs and cookbooks to find useful patterns and discover new combinations.

Plugin manifests2

.codex-plugin/plugin.json
{
  "name": "lean-and-mean",
  "description": "Concise prose, YAGNI code, and session handoffs in CLAUDE.md or AGENTS.md.",
  "version": "3.1.0",
  "author": {
    "name": "Spinlock Development",
    "url": "https://github.com/spinlockdevelopment"
  },
  "homepage": "https://github.com/spinlockdevelopment/lean-and-mean",
  "repository": "https://github.com/spinlockdevelopment/lean-and-mean",
  "license": "MIT",
  "keywords": [
    "yagni",
    "terse",
    "claude-md",
    "context-files",
    "operating-mode",
    "hooks"
  ],
  "skills": "./skills/",
  "interface": {
    "displayName": "Lean and Mean",
    "shortDescription": "Concise prose, minimal code, useful handoffs",
    "longDescription": "Concise prose, YAGNI code, and session handoffs in CLAUDE.md or AGENTS.md.",
    "developerName": "Spinlock Development",
    "category": "Productivity",
    "capabilities": [
      "Read",
      "Write"
    ],
    "websiteURL": "https://github.com/spinlockdevelopment/lean-and-mean",
    "defaultPrompt": [
      "Use $lean-and-mean to set up this project."
    ]
  }
}
.claude-plugin/plugin.json
{
  "name": "lean-and-mean",
  "description": "Concise prose and YAGNI code, installed into the project CLAUDE.md. /endsession offers to commit, writes Rules, Next and Todo, then stops.",
  "version": "3.1.0",
  "author": {
    "name": "Spinlock Development",
    "url": "https://github.com/spinlockdevelopment"
  },
  "homepage": "https://github.com/spinlockdevelopment/lean-and-mean",
  "repository": "https://github.com/spinlockdevelopment/lean-and-mean",
  "license": "MIT",
  "keywords": [
    "yagni",
    "terse",
    "claude-md",
    "context-files",
    "operating-mode",
    "hooks"
  ]
}

For maintainers

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[lean-and-mean on Agent Plugins Marketplace](https://pluginsmp.com/plugins/lean-and-mean)