agentmods.dev

python-code-validator

python-code-validator is a plugin for Claude Code from jkanselaar/python-code-validator. Its manifest loads nothing; the 1 skill, 1 hook it bundles cost 44 tokens per session together, scanned A, original, MIT.

A plugin that checks Python files written by the coding agent for syntax errors, style issues, type problems, security-policy violations, and exposed credentials.

In plain words
What is it for?
Use it when an agent creates Python code and you want automated checks for correctness, code quality, security, and leaked secrets.
Why use it?
It catches common code and security problems before you review or use the generated Python file, and reports the exact fix when available.

Plugin for Claude Code

Written for Claude Code: a Claude Code plugin manifest.

not rated 0repo 2mo ago A scan tokens not measured original MIT

Good fit Use it when an agent creates Python code and you want automated checks for correctness, code quality, security, and leaked secrets.

Compare 6 plugins from other repositories ↓
Install in Claude Code
/plugin marketplace add jkanselaar/python-code-validator
/plugin install python-code-validator
View source ↗ jkanselaar/python-code-validator api.statemind.ai
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/jkanselaar/python-code-validator

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 python-code-validator

README.md
[![agentmods](https://agentmods.dev/badge/plugins/jkanselaar/python-code-validator/plugin/github.svg)](https://agentmods.dev/plugins/jkanselaar/python-code-validator/plugin)
Your own site
<a href="https://agentmods.dev/plugins/jkanselaar/python-code-validator/plugin"><img src="https://agentmods.dev/badge/plugins/jkanselaar/python-code-validator/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 python-code-validator

Your own site · 80×15
<a href="https://agentmods.dev/plugins/jkanselaar/python-code-validator/plugin"><img src="https://agentmods.dev/badge/plugins/jkanselaar/python-code-validator/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 1 skill, 1 hook cost 44 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

python-code-validator 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 1mo 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 · 16 lines

What it actually says

{
  "name": "python-code-validator",
  "displayName": "Python Code Validator",
  "version": "1.0.0",
  "description": "Checks every Python file Claude writes, before you read it: syntax, lint, types, an AST security policy and a credential scan, with the exact fix when there is one.",
  "author": {
    "name": "StateMind",
    "url": "https://api.statemind.ai"
  },
  "homepage": "https://api.statemind.ai",
  "repository": "https://github.com/jkanselaar/python-code-validator",
  "license": "MIT",
  "keywords": ["python", "validation", "security", "lint", "code-quality"],
  "hooks": "./hooks/hooks.json"
}
Contents

What it installs

The manifest is a name and a version. 1 skill, 1 hook travel with it, and installing the plugin installs all of them — 44 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. 1mo ago First seen · 16 lines scan A 88270c93af9f

Subscribe to this mod's changes

python-code-validator is a plugin published in the GitHub repository jkanselaar/python-code-validator (0 stars, last pushed 2mo 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 2026-08-31.

DebuggingSecurityai-agentscode-qualitygemini-cli-extensionmcpmcp-servermodel-context-protocol
Related

Other plugins, from other repositories

devcdp

Real Chrome DevTools access for Claude: console, network, DOM, source maps, breakpoints and live variables, plus guidance on when to use each.

Dayananda-D/DevCDP · not measured

devcdp

Real Chrome DevTools access for Gemini CLI: console, network, DOM, source maps, breakpoints and live variables.

Dayananda-D/DevCDP · not measured

logic-lens

Logic-first code review using semi-formal execution tracing. Surfaces behavioral bugs, type contract breaches, boundary blindspots, and interprocedural semantic mismatches — the logic errors that cause production incidents in syntax-clean code.

hyhmrright/logic-lens · not measured

logic-lens

Logic-first code review using semi-formal execution tracing. Surfaces behavioral bugs, semantic errors, and runtime failures that linters miss.

hyhmrright/logic-lens · not measured

synapse-mcp

A persistent code-knowledge graph for AI agents. Runs locally. Writes safely.

myelixlabs/synapse-mcp · not measured

horizon-shield

Check Japanese construction and renovation estimates against the open JCCDB dataset (526,128 records) and get Bitcoin-anchored, recomputable fair-price receipts; find contractors that passed the independent fair-price check (YAKUMO); public construction-cost data for Japan and the U.S. (JCCDB, USCCDB) from a separate…

ogasurfproject-jpg/horizon-shield · not measured