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poly

v0.28.2

Zero-dependency lint & format orchestrator over MCP — one pure-Rust binary wrapping ruff/oxc/taplo/rumdl and more as in-process backends, plus a tree-sitter generic tier for everything else. Exposes lint/format/cache tools with structured JSON output.

CodexClaude Code5 Skills1 MCP serverstdio

By Na'aman HirschfeldLicense: MIT19 GitHub starsUpdated 2 weeks ago

Directory evidence

Runtimes
Codex and Claude Code
Parsed components
6 skill or MCP entries
Source updated
Oct 3, 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 poly 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 poly@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/Goldziher/poly

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

poly/
├── .codex-plugin/plugin.json
├── .claude-plugin/plugin.json
├── skills/poly-lint-and-format/SKILL.md
├── skills/poly-mcp/SKILL.md
├── skills/poly-orchestrator/SKILL.md
├── skills/poly-overview/SKILL.md
├── skills/poly-tiers-and-scope/SKILL.md
└── .mcp.json

Included Skills5

poly-lint-and-formatskills/poly-lint-and-format/SKILL.md

Running poly lint / poly fmt — --fix, --format pretty|json|toon, --exclude, --config, exit codes, inline suppression, and the check → read-json → fix → re-check loop

poly-mcpskills/poly-mcp/SKILL.md

The poly MCP server — the eleven tools and which are read-only vs mutating, the paths/exclude/config/format params, async Tasks for the whole-project phase, and the isError contract

poly-orchestratorskills/poly-orchestrator/SKILL.md

Use poly as the single lint/format gate instead of invoking ruff/oxlint/rustfmt directly — one poly.toml, poly hooks install, poly migrate, CI via the Goldziher/poly setup Action

poly-overviewskills/poly-overview/SKILL.md

What poly is — the native, tree-sitter, native-toolchain, quality, and built-in-rule-pack tiers, language coverage, and when to reach for it

poly-tiers-and-scopeskills/poly-tiers-and-scope/SKILL.md

poly's coverage tiers (native / tree-sitter / native-toolchain / quality / built-in ast-grep pack), the per-file tier vs the whole-project phase (--no-workspace), staged isolation (ADR 0019), and hierarchical poly.toml in monorepos (ADR 0018)

MCP servers1

polystdio
command
poly
args
mcp

Plugin manifests2

.codex-plugin/plugin.json
{
  "name": "poly",
  "version": "0.28.2",
  "description": "Zero-dependency lint & format orchestrator over MCP — one pure-Rust binary wrapping ruff/oxc/taplo/rumdl and more as in-process backends, plus a tree-sitter generic tier for everything else. Exposes lint/format/cache tools with structured JSON output.",
  "author": {
    "name": "Na'aman Hirschfeld",
    "email": "[email protected]",
    "url": "https://github.com/Goldziher"
  },
  "homepage": "https://github.com/Goldziher/poly",
  "repository": "https://github.com/Goldziher/poly",
  "license": "MIT",
  "keywords": [
    "linter",
    "formatter",
    "mcp",
    "code-quality",
    "rust"
  ],
  "skills": "./skills/",
  "mcpServers": "./.mcp.json",
  "interface": {
    "displayName": "poly",
    "shortDescription": "Zero-dependency lint & format orchestrator over MCP",
    "longDescription": "poly is a single pure-Rust binary that lints and formats a whole repository across languages — wrapping ruff/oxc/taplo/rumdl and more as in-process backends, with a tree-sitter generic tier for everything else. Its MCP server exposes lint/format/cache tools with structured JSON output, no subprocesses and no system dependencies by default.",
    "developerName": "Na'aman Hirschfeld",
    "category": "Developer Tools",
    "capabilities": [
      "Interactive",
      "Read"
    ],
    "defaultPrompt": [
      "Lint this repository with poly and summarize the findings.",
      "Check formatting drift with poly and list the affected files.",
      "Apply poly's lint and format autofixes, then report what remains.",
      "Show poly's effective configuration for this repo."
    ],
    "websiteURL": "https://github.com/Goldziher/poly",
    "brandColor": "#F97316"
  }
}
.claude-plugin/plugin.json
{
  "name": "poly",
  "displayName": "poly",
  "description": "Zero-dependency lint & format orchestrator over MCP — one pure-Rust binary wrapping ruff/oxc/taplo/rumdl and more as in-process backends, plus a tree-sitter generic tier for everything else. Exposes lint/format/cache tools with structured JSON output.",
  "version": "0.28.2",
  "author": {
    "name": "Na'aman Hirschfeld",
    "email": "[email protected]",
    "url": "https://github.com/Goldziher"
  },
  "homepage": "https://github.com/Goldziher/poly",
  "repository": "https://github.com/Goldziher/poly",
  "license": "MIT",
  "keywords": [
    "linter",
    "formatter",
    "mcp",
    "code-quality",
    "rust"
  ],
  "mcpServers": {
    "poly": {
      "command": "poly",
      "args": [
        "mcp"
      ]
    }
  }
}

For maintainers

If you maintain this plugin, link to this source-backed listing from your README so users can review its manifest and indexed components.

[poly on Agent Plugins Marketplace](https://pluginsmp.com/plugins/poly)