claude-codex-settings

claude-codex-settings is an open-source repository by Fatih Cagatay Akyon (fcakyon) that provides ready-to-use configuration files, plugins, skills, hooks, subagents, and MCP server setups for Claude Code, OpenAI Codex CLI, Cursor, and Gemini CLI. The project is structured around Andrej Karpathy's observations on LLM coding pitfalls — surfacing assumptions, avoiding over-complication, making surgical changes, and verifying before moving on. It is licensed under Apache 2.0 and hosted at claudesettings.com.

What It Is

claude-codex-settings is a shared configuration and plugin marketplace for AI coding tools. Rather than maintaining separate setups for each tool, it provides a single repository that works across Claude Code, Codex CLI, Cursor, and Gemini CLI. The core CLAUDE.md file encodes opinionated coding principles (delete over add, search before creating, no defensive programming without justification), and the plugin system extends each tool with skills, hooks, agents, and slash commands. The project also ships ready-to-use settings files for running Claude Code against alternative model providers — Kimi K3, MiniMax M3, and Z.ai GLM-5.2 — via their Anthropic-compatible APIs.

Plugin Architecture

The repository is organized as a plugin marketplace. Each plugin lives under plugins/ and can contain any combination of:

• Skills — reusable instruction sets that can be installed as ZIP files into claude.ai, Claude Code, Cursor, Codex, or VS Code
• Hooks — pre/post tool-use scripts (Python or Bash) that intercept writes, commits, and compactions
• Agents — subagent definitions for tasks like PR creation, code review, and second-opinion checks
• Commands — slash commands like /simplify, /factcheck, and /create-pr
• MCP configs — bundled .mcp.json files for tools like Tavily, Azure, GCloud, and MongoDB

Plugins are installed with a single command per tool (e.g., claude plugin install simplify@claude-settings) after adding the marketplace once.

Key Plugins

The repository ships a broad set of plugins covering different workflow needs:

• simplify — reviews staged diffs across four angles (reuse, simplification, efficiency, altitude) and applies fixes; brings Claude Code's built-in /simplify to Codex, Cursor, and Gemini
• humanize — blocks 53 AI buzzwords, 16 clichés, and 3 punctuation marks on every Write/Edit via a hook; word list draws on Wikipedia's "Signs of AI writing"
• github-dev — Git and GitHub automation with agents for commit creation, PR creation, PR review, and comment resolution
• fable-advisor / codex-advisor — cross-model second-opinion agents; fable-advisor uses Claude Fable 5, codex-advisor routes to GPT via Codex CLI
• adhd-output-style — low-token output formatting with answer-first structure and short teaching notes
• intelligent-compact — preserves file paths, root causes, and open questions through Claude Code's auto-compaction summaries
• python-skills, react-skills, mongodb-skills, supabase-skills, stripe-skills — domain-specific best-practice skill sets from authoritative sources

Alternative Model Provider Support

A notable feature is first-class support for running Claude Code against non-Anthropic model providers via their Anthropic-compatible APIs:

• Kimi K3 (kimi-k3[1m]) via Moonshot AI — 1M context, native vision, thinking mode
• MiniMax M3 (MiniMax-M3[1m]) via MiniMax — 1M context window
• Z.ai GLM-5.2 (glm-5.2[1m]) via Z.ai — 1M context, significantly cheaper than frontier Claude models

Each provider has a dedicated settings file (.claude/settings-kimi.json, etc.) and, where the Responses API is supported, a Codex CLI config (.codex/config-kimi.toml).

Update: v2.6.0

The latest release is v2.6.0, published on 2026-08-06, with the repository last pushed on 2026-08-15. The GitHub metadata shows 1,061 stars and 99 forks as of the last crawl. The project roadmap (TODO section in the README) lists planned additions including TanStack skills, auth patterns (Clerk, Firebase), a Paddle billing skill, and a rename/rebranding to "Agent Plugins" with a dedicated catalog site at agentplugins.net. The repository is listed in the Awesome Claude Code collection.