poly

poly is a plugin for Claude Code from Goldziher/poly. Its manifest loads nothing; the 5 skills, 3 commands it bundles cost 253 tokens per session together, scanned A, original, MIT.

A code-quality tool that runs linters and formatters through one interface and returns structured JSON results. Linters find likely code problems, while formatters apply consistent layout.

In plain words
What is it for?
Use it to lint, format, and cache results across supported languages and generic syntax-tree-based checks.
Why use it?
It gives different language tools a common way to check and format a codebase, with caching to avoid unnecessary repeated work.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

Good fit Use it to lint, format, and cache results across supported languages and generic syntax-tree-based checks.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add Goldziher/poly
/plugin install poly
Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

Clone the repo
git clone --depth 1 https://github.com/Goldziher/poly

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for poly

README.md
[![agentmods](https://agentmods.dev/badge/plugins/goldziher/poly/plugin/github.svg)](https://agentmods.dev/plugins/goldziher/poly/plugin)
Your own site
<a href="https://agentmods.dev/plugins/goldziher/poly/plugin"><img src="https://agentmods.dev/badge/plugins/goldziher/poly/plugin/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for poly

Your own site · 80×15
<a href="https://agentmods.dev/plugins/goldziher/poly/plugin"><img src="https://agentmods.dev/badge/plugins/goldziher/poly/plugin.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured The manifest loads nothing itself; its 5 skills, 3 commands cost 253 tokens a session between them.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

poly scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

plugin/.claude-plugin/plugin.json · 29 lines

What it actually says

{
  "name": "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": "0.29.0",
  "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"
      ]
    }
  }
}
Contents

What it installs

The manifest is a name and a version. 5 skills, 3 commands travel with it, and installing the plugin installs all of them — 253 tokens a session between them. Each is measured on its own page, and each can be installed alone.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 2d ago First seen · 29 lines scan A b078edfe536c

Subscribe to this mod's changes

poly is a plugin published in the GitHub repository Goldziher/poly (20 stars, last pushed 2d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-10-15.