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dev-starter-kit: Instructions file for Claude Code

CLAUDE.md

dev-starter-kit CLAUDE.md is an instructions file for Claude Code from humzakt/dev-starter-kit. It costs 469 tokens per session, scanned A, original, MIT.

Project instructions for a Python starter kit, covering linting, formatting, testing, code style, and pre-commit checks. Linting finds likely code problems, while tests check that the code behaves as expected.

In plain words
What is it for?
Use it when editing the project, running Ruff checks and formatting, writing tests with pytest, or preparing code for review.
Why use it?
It gives contributors a consistent workflow and catches style issues or regressions before changes are accepted.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md; mentions Claude Code.

This is humzakt/dev-starter-kit's own configuration. It tells Claude Code how to work on dev-starter-kit itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything dev-starter-kit configures →

not rated 3repo 7mo ago A scan 469 tokens original MIT
View source ↗ humzakt/dev-starter-kit
Reuse

Borrowing it

Nothing to install: this file belongs to humzakt/dev-starter-kit. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file
curl -O https://raw.githubusercontent.com/humzakt/dev-starter-kit/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/humzakt/dev-starter-kit

Made for: Claude Code.

Wrote this? Show the measurements

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README.md
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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.

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<a href="https://agentmods.dev/instructions/humzakt/dev-starter-kit/claude-md"><img src="https://agentmods.dev/badge/instructions/humzakt/dev-starter-kit/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 469 This file is loaded in full into every session.
When invoked 469 The same file — it is already loaded in full.
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.
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 $0.00469 $0.00469
Opus 5.5 $0.00188 $0.00188
Sonnet 5.5 $0.00094 $0.00094
Haiku 4.5 $0.00047 $0.00047

Measured 1mo ago against content hash 325914388033, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

dev-starter-kit CLAUDE.md 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.

CLAUDE.md · 63 lines

What it actually says

CLAUDE.md — Instructions for Claude Code

Claude reads this file at the start of every session. Keep it concise and actionable.

Commands

# Lint
ruff check . && ruff format --check .

# Fix lint
ruff check --fix . && ruff format .

# Test
pytest tests/ -v

# Test single file
pytest tests/test_<module>.py -v

# Pre-commit
pre-commit run --all-files

Code Style

  • Python 3.11+, Ruff for linting/formatting (config in pyproject.toml)
  • 120 char line length, double quotes, Google-style docstrings
  • Type hints on all public function signatures
  • Specific exception handling (no bare except:)
  • pathlib.Path over os.path, f-strings over .format()

Testing Rules

  • Tests in tests/test_<module>.py, classes Test<ModuleName>, methods test_<func>[_<scenario>]
  • Mock external dependencies — no real network calls in tests
  • Every source change needs a corresponding test change (CI enforced)
  • Run pytest tests/ -v after every change

Workflow

  1. Read relevant files before editing
  2. Make minimal, focused changes
  3. Run ruff check --fix . && ruff format . after every edit
  4. Run pytest tests/ -v to verify
  5. If tests fail, fix them before moving on
  6. Use conventional commits: feat:, fix:, chore:, docs:, test:, refactor:

Architecture

  • src/ — source code
  • tests/ — tests (mirrors src/ structure)
  • docs/ — documentation
  • pyproject.toml — ruff + pytest config
  • .github/workflows/ — CI/CD

Don'ts

  • Don't commit .env files or secrets
  • Don't skip tests — CI will catch it
  • Don't commit directly to main — branch protection is on
  • Don't add unnecessary comments that just narrate what code does
  • Don't create files unless absolutely necessary — prefer editing existing ones
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 · 63 lines · 469 tokens per session scan A 325914388033

Subscribe to this mod's changes

dev-starter-kit CLAUDE.md is an instructions file published in the GitHub repository humzakt/dev-starter-kit (3 stars, last pushed 7mo ago), licensed MIT. It adds 469 tokens to every session, about $0.0019 per session on Opus 5.5. 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 2026-08-31.

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