https://github.com/agent-sh/agnix
The missing linter and lsp for AI coding assistants. Validate CLAUDE.md, AGENTS.md, SKILL.md, hooks, MCP. Plugin for all major IDEs included, with autofixes.
https://github.com/agent-sh/agnix
agent ai ai-agents ai-coding-assistant claude cli code-quality codex copilot cursor devtools linter llm lsp mcp opencode rust skills vscode vscode-extension
Last synced: 9 days ago
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The missing linter and lsp for AI coding assistants. Validate CLAUDE.md, AGENTS.md, SKILL.md, hooks, MCP. Plugin for all major IDEs included, with autofixes.
- Host: GitHub
- URL: https://github.com/agent-sh/agnix
- Owner: agent-sh
- License: apache-2.0
- Created: 2026-01-30T23:54:10.000Z (2 months ago)
- Default Branch: main
- Last Pushed: 2026-03-26T22:44:16.000Z (15 days ago)
- Last Synced: 2026-03-27T06:52:18.062Z (15 days ago)
- Topics: agent, ai, ai-agents, ai-coding-assistant, claude, cli, code-quality, codex, copilot, cursor, devtools, linter, llm, lsp, mcp, opencode, rust, skills, vscode, vscode-extension
- Language: Rust
- Homepage:
- Size: 61.1 MB
- Stars: 109
- Watchers: 4
- Forks: 12
- Open Issues: 1
-
Metadata Files:
- Readme: README.md
- Changelog: CHANGELOG.md
- Contributing: CONTRIBUTING.md
- License: LICENSE-APACHE
- Code of conduct: CODE_OF_CONDUCT.md
- Audit: audit.toml
- Security: SECURITY.md
- Agents: AGENTS.md
Awesome Lists containing this project
- awesome-claude-code - agnix - sh](https://github.com/agent-sh) - A comprehensive linter for Claude Code agent files. Validate CLAUDE.md, AGENTS.md, SKILL.md, hooks, MCP, and more. Plugin for all major IDEs included, with auto-fixes. (Latest Additions)
README
agnix
Lint agent configurations before they break your workflow
Catch broken agent configs before your AI tools silently ignore them.
385 rules across Claude Code, Codex CLI, OpenCode, Cursor, Copilot, and more -
validating CLAUDE.md, SKILL.md, hooks, MCP configs, and other agent files.
Auto-fix | GitHub Action | VS Code + JetBrains + Neovim + Zed
New rules and tool support ship constantly. Follow for real-time updates:
## Why agnix?
**Your skills don't trigger.** Vercel's research found skills [invoke at 0%](https://vercel.com/blog/agents-md-outperforms-skills-in-our-agent-evals) without correct syntax. One wrong field and your skill is invisible.
**"Almost right" is the worst outcome.** [66% of developers](https://survey.stackoverflow.co/2025/ai) cite it as their biggest AI frustration. Misconfigured agents produce exactly this.
**Multi-tool stacks fail silently.** Cursor + Claude Code + Copilot each want different formats. A config that works in one tool [breaks in another](https://arnav.tech/beyond-copilot-cursor-and-claude-code-the-unbundled-coding-ai-tools-stack).
**Bad patterns get amplified.** AI assistants don't ignore wrong configs - they [learn from them](https://www.augmentcode.com/guides/enterprise-coding-standards-12-rules-for-ai-ready-teams).
agnix validates all of it - 385 rules sourced from official specs, academic research, and real-world breakage patterns. Auto-fix included.
> **Want to try it first?** [Open the playground](https://agent-sh.github.io/agnix/playground) - paste any agent config, see diagnostics instantly. No install, runs in your browser.
## Quick Start
```console
$ npx agnix .
Validating: .
CLAUDE.md:15:1 warning: Generic instruction 'Be helpful and accurate' [fixable]
help: Remove generic instructions. Claude already knows this.
.claude/skills/review/SKILL.md:3:1 error: Invalid name 'Review-Code' [fixable]
help: Use lowercase letters and hyphens only (e.g., 'code-review')
Found 1 error, 1 warning
2 issues are automatically fixable
hint: Run with --fix, --fix-safe, or --fix-unsafe to apply fixes
```
https://github.com/user-attachments/assets/72d5fe7c-476f-46ea-be64-5785cf6d5600
## Install
```bash
# npm (recommended, all platforms)
npm install -g agnix
# Homebrew (macOS/Linux)
brew tap agent-sh/agnix && brew install agnix
# Cargo
cargo install agnix-cli
```
[Pre-built binaries](https://github.com/agent-sh/agnix/releases) | [All install options](https://agent-sh.github.io/agnix/docs/installation)
### Editor Extensions
| Editor | Install |
|--------|---------|
| **VS Code** | [VS Code Marketplace](https://marketplace.visualstudio.com/items?itemName=avifenesh.agnix) |
| **JetBrains** | [JetBrains Marketplace](https://plugins.jetbrains.com/plugin/30087-agnix) |
| **Neovim** | `{ "agent-sh/agnix", config = function() require("agnix").setup() end }` |
| **Zed** | Search "agnix" in Extensions |
[Editor setup guide](https://agent-sh.github.io/agnix/docs/editor-integration)
### GitHub Action
```yaml
- name: Validate agent configs
uses: agent-sh/agnix@v0
with:
target: 'claude-code'
```
## Usage
```bash
agnix . # Validate current directory
agnix --fix . # Apply HIGH and MEDIUM confidence fixes
agnix --fix-safe . # Apply only HIGH confidence fixes
agnix --fix-unsafe . # Apply all fixes, including LOW confidence
agnix --dry-run --show-fixes . # Preview fixes with inline diff output
agnix --strict . # Strict mode (warnings = errors)
agnix --target claude-code . # Legacy target preset (primarily affects CC-* rules)
agnix --target kiro . # Legacy target preset (use tools = [...] for tool-only filtering)
```
[Full CLI reference](https://agent-sh.github.io/agnix/docs/configuration) | [Full rules reference](https://agent-sh.github.io/agnix/docs/rules)
## Supported Tools
| Tool | Rules | Count | Config Files |
|------|-------|-------|--------------|
| [Agent Skills](https://agentskills.io) | AS-\*, CC-SK-\* | 31 | SKILL.md |
| [Claude Code](https://docs.anthropic.com/en/docs/build-with-claude/claude-code) | CC-\* | 53 | CLAUDE.md, hooks, agents, plugins |
| [GitHub Copilot](https://docs.github.com/en/copilot) | COP-\* | 6 | .github/copilot-instructions.md, .github/instructions/\*.instructions.md |
| [Cursor](https://cursor.com) | CUR-\* | 16 | .cursor/rules/\*.mdc, .cursorrules, .cursor/hooks.json, .cursor/agents/\*\*/\*.md, .cursor/environment.json |
| [Kiro](https://kiro.dev) | KIRO-\*, KR-SK-\*, KR-AG-\*, KR-HK-\*, KR-PW-\*, KR-MCP-\* | 51 | .kiro/steering/\*\*/\*.md, .kiro/skills/\*\*/SKILL.md, .kiro/agents/\*.json, .kiro/hooks/\*.kiro.hook, .kiro/settings/mcp.json, .kiro/powers/\*/POWER.md |
| [MCP](https://modelcontextprotocol.io) | MCP-\* | 12 | \*.mcp.json |
| [AGENTS.md](https://agentsmd.org) | AGM-\*, XP-\* | 13 | AGENTS.md, AGENTS.local.md, AGENTS.override.md |
| [Cline](https://docs.cline.bot) | CLN-\* | 4 | .clinerules, .clinerules/\*.md, .clinerules/\*.txt |
| [Gemini CLI](https://github.com/google-gemini/gemini-cli) | GM-\* | 9 | GEMINI.md, GEMINI.local.md, .gemini/settings.json (hooks), gemini-extension.json (extensions), .geminiignore |
## Architecture
Rust workspace crates:
- `agnix-rules` - rule metadata generated from `knowledge-base/rules.json`
- `agnix-core` - shared validation engine library
- `agnix-cli` - command-line interface binary
- `agnix-lsp` - language server binary
- `agnix-mcp` - MCP server binary
- `agnix-wasm` - WebAssembly bindings for browser/runtime integrations
## Contributing
Contributions welcome. See [CONTRIBUTING.md](CONTRIBUTING.md) for the development guide.
[Report a bug](https://github.com/agent-sh/agnix/issues/new) | [Request a rule](https://github.com/agent-sh/agnix/issues/new) | [Good first issues](https://github.com/agent-sh/agnix/labels/good%20first%20issue)
## License
MIT OR Apache-2.0
---
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