check-code

A command that checks Python code with linting, formatting, type checking, tests, test coverage, function length, and duplication checks.

In plain words
What is it for?
Use it to run Ruff, mypy, and pytest checks, review coverage and structural issues, and receive a READY or NEEDS WORK verdict.
Why use it?
It groups common quality checks into one review and clearly identifies failures and their suggested priority.

Command for Claude Code

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 commands/benkapner/claude-code-basecamp/check-code
Clone the repo
git clone --depth 1 https://github.com/Benkapner/claude-code-basecamp

Made for: Claude Code.

Per session 7 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 194 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 $0.00007 $0.00194
Opus 5 $0.00003 $0.00097
Sonnet 5 $0.00001 $0.00039
Haiku 4.5 $0.00001 $0.00019

Measured yesterday against content hash 2af096cb0abc, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade A, and why

check-code 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 yesterday.

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.

.claude/commands/check-code.md · 31 lines

What it actually says

Check Code

Look at the code in the current directory or the path provided by the user.

Run these checks:

  1. Run ruff check . to find linting issues
  2. Run ruff format --check . to check formatting
  3. Run mypy . --ignore-missing-imports for type checking
  4. Run pytest --cov -q to check test coverage

For each check, report:

  • What passed
  • What failed
  • How to fix the failures

If all checks pass, tell the user the code looks good.

If there are failures, prioritize them:

  • Security issues first
  • Type errors second
  • Lint issues third
  • Formatting last

Also check if functions are too long (over 50 lines) and if there's code duplication.

At the end, give an overall verdict: READY or NEEDS WORK.

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. yesterday First seen · 31 lines · 7 tokens per session scan A 2af096cb0abc

Subscribe to this mod's changes

check-code is a command published in the GitHub repository Benkapner/claude-code-basecamp (16 stars, last pushed 12d ago), licensed MIT. It adds 7 tokens to every session and 194 once invoked, about $0.0000 per session on Opus 5. 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 2026-08-30.