mypy

mypy is a skill for Claude Code, Codex from rootwarp/claude-code-plugins-monorepo. It costs 0 tokens per session (145 once invoked), scanned A, original, MIT.

A tool for checking whether Python code’s types are used consistently with mypy, a static type checker. It can check the whole source directory or selected files and can produce a report.

In plain words
What is it for?
Use it to type-check Python source code, run stricter checks, display error codes, handle missing library type information, or generate an HTML report.
Why use it?
It finds likely type mistakes before the program runs, such as passing the wrong kind of value to a function. This makes type-related errors easier to catch during development.

Skill for Claude CodeCodex

Part of the python plugin — 4 skills shipped together

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.

agentmods
npx agentmods add skills/rootwarp/claude-code-plugins-monorepo/mypy
Any agent
npx skills add rootwarp/claude-code-plugins-monorepo --skill mypy
Clone the repo
git clone --depth 1 https://github.com/rootwarp/claude-code-plugins-monorepo

Made for: Claude Code, Codex.

Or install python, the plugin that ships this one along with the rest of its 4 skills.

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 mypy

README.md
[![agentmods](https://agentmods.dev/badge/skills/rootwarp/claude-code-plugins-monorepo/mypy.svg)](https://agentmods.dev/skills/rootwarp/claude-code-plugins-monorepo/mypy)
Your own site
<a href="https://agentmods.dev/skills/rootwarp/claude-code-plugins-monorepo/mypy"><img src="https://agentmods.dev/badge/skills/rootwarp/claude-code-plugins-monorepo/mypy.svg" alt="Measured on agentmods" height="20"></a>
Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.
When invoked 145 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00000 $0.00145
Opus 5 $0.00000 $0.00072
Sonnet 5 $0.00000 $0.00029
Haiku 4.5 $0.00000 $0.00015

Measured 3d ago against content hash 9fdfe05b1a24, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

mypy 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 3d 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.

plugins/python/skills/mypy/SKILL.md · 39 lines

What it actually says

/mypy

Run type checking on the Python project using uv.

Instructions

Run mypy for type checking:

uv run mypy src/

Or check specific files:

uv run mypy src/<package_name>/main.py

For strict mode:

uv run mypy --strict src/

Common options:

# Show error codes
uv run mypy --show-error-codes src/

# Ignore missing imports
uv run mypy --ignore-missing-imports src/

# Generate HTML report
uv run mypy --html-report mypy-report src/

Analyze any type errors and suggest fixes with proper type annotations.

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. 3d ago First seen · 39 lines · 0 tokens per session scan A 9fdfe05b1a24

Subscribe to this mod's changes

mypy is a skill published in the GitHub repository rootwarp/claude-code-plugins-monorepo (2 stars, last pushed 4mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 145 tokens. 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.

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