python-reviewer

python-reviewer is an agent for Claude Code from jwiegley/claude-prompts. It costs 22 tokens per session (988 once invoked), scanned A, original, no licence file.

A reviewer for Python code, focusing on types, security, common mistakes, and the usual Python style.

In plain words
What is it for?
Use it to review Python changes for type issues, security risks, common pitfalls, and idiomatic solutions.
Why use it?
It helps catch errors and unsafe or hard-to-maintain patterns before they cause problems.

Agent for Claude Code

Written for Claude Code: a Claude Code subagent (agents/*.md). Also seen: model in frontmatter.

Good fit Use it to review Python changes for type issues, security risks, common pitfalls, and idiomatic solutions.

Compare 6 agents from other repositories ↓
Install with agentmods
npx agentmods add agents/jwiegley/claude-prompts/python-reviewer
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/jwiegley/claude-prompts

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-reviewer

README.md
[![agentmods](https://agentmods.dev/badge/agents/jwiegley/claude-prompts/python-reviewer/github.svg)](https://agentmods.dev/agents/jwiegley/claude-prompts/python-reviewer)
Your own site
<a href="https://agentmods.dev/agents/jwiegley/claude-prompts/python-reviewer"><img src="https://agentmods.dev/badge/agents/jwiegley/claude-prompts/python-reviewer/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-reviewer

Your own site · 80×15
<a href="https://agentmods.dev/agents/jwiegley/claude-prompts/python-reviewer"><img src="https://agentmods.dev/badge/agents/jwiegley/claude-prompts/python-reviewer.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 22 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 988 The whole file, excluding the scripts and references it only reads on demand.
Security scan A 1 finding. A grade says what 26 rules found in the file — not that it is safe.
Origin unknown 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 5.1 $0.00022 $0.00988
Opus 5.5 $0.00009 $0.00395
Sonnet 5.5 $0.00004 $0.00198
Haiku 4.5 $0.00002 $0.00099

Measured 1mo ago against content hash 845e3d874521, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

python-reviewer scanned grade A with 1 finding 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.

Runs shell commandslowCapability

Expected in a hook, worth knowing in a rule or an instructions file.

- `subprocess.shell=True` with variable input → command injection
agents/python-reviewer.md · 90 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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 · 90 lines · 22 tokens per session scan A 845e3d874521

Subscribe to this mod's changes

python-reviewer is an agent published in the GitHub repository jwiegley/claude-prompts (20 stars, last pushed 1mo ago), with no licence file. It adds 22 tokens to every session and 988 once invoked, about $0.0001 per session on Opus 5.5. A static security scan graded it A with 1 finding (runs shell commands). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Related

Other agents, from other repositories

python-reviewer

Expert Python code reviewer specializing in PEP 8 compliance, Pythonic idioms, type hints, security, and performance. Use for all Python code changes. MUST BE USED for Python projects.

affaan-m/ECC · 43 tokens

agent-sdk-verifier-py

Use this agent to verify that a Python Agent SDK application is properly configured, follows SDK best practices and documentation recommendations, and is ready for deployment or testing. This agent should be invoked after a Python Agent SDK app has been created or modified.

anthropics/claude-plugins-official · 55 tokens

python-reviewer

Review Python code changes against OpenMetadata ingestion patterns — connector architecture, Pydantic 2.x models, pytest conventions, and schema-first design.

open-metadata/OpenMetadata · 32 tokens

python-pro

Python 3.13 language expert for the ClosedLoop plugin monorepo. Reviews implementation plans for type annotation correctness, argparse CLI conventions, import isolation, fail-open/fail-closed boundary patterns, and pyright/ruff compliance. Produces type-patterns.md in legacy mode.

closedloop-ai/claude-plugins · 60 tokens

python-reviewer

Python 3.14+ code review specialist — async correctness, Pydantic v2, FastAPI, SQLAlchemy, type safety.

TheBeardedBearSAS/claude-craft · 31 tokens

python-refactor-expert

Expert Python code refactoring specialist. Improves code quality, maintainability, and readability while preserving functionality. Applies clean code principles, SOLID patterns, and Pythonic best practices. Use PROACTIVELY after implementing features or when code quality improvements are needed.

giuseppe-trisciuoglio/developer-kit · 58 tokens