Borrowing it
Nothing to install: this file belongs to shelkesays/safelint. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/shelkesays/safelint/main/CLAUDE.mdgit clone --depth 1 https://github.com/shelkesays/safelintWrote 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.
[](https://agentmods.dev/instructions/shelkesays/safelint/claude-md)<a href="https://agentmods.dev/instructions/shelkesays/safelint/claude-md"><img src="https://agentmods.dev/badge/instructions/shelkesays/safelint/claude-md/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.
<a href="https://agentmods.dev/instructions/shelkesays/safelint/claude-md"><img src="https://agentmods.dev/badge/instructions/shelkesays/safelint/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.05456 | $0.05456 |
| Opus 5.5 | $0.02182 | $0.02182 |
| Sonnet 5.5 | $0.01091 | $0.01091 |
| Haiku 4.5 | $0.00546 | $0.00546 |
Grade A, and why
safelint 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.
How it starts
The opening of the file, as written. The whole thing — 147 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project overview
SafeLint is a static analysis tool that enforces Holzmann "Power of Ten" safety rules adapted for Python, JavaScript, TypeScript (including TSX / AssemblyScript), Java (with a Spring Boot framework preset), Rust, and Go. It uses Tree-sitter (not Python's ast module) for parsing; this matters for any rule work because rules walk Tree-sitter trees, not AST nodes. The tool ships as both a CLI (safelint) and a pre-commit hook, and lints itself in CI.
Common commands
This project uses uv for dependency management. Most contributors invoke tools through it.
# Install with dev extras (pre-commit, pytest, ruff, ty)
uv sync --extra dev
# or: pip install -e ".[dev]"
# Tests (uses --cov=src by default per pyproject; coverage gate is fail_under=97)
uv run pytest
# Run a single test file / test
uv run pytest tests/core/test_engine.py
uv run pytest tests/core/test_engine.py::test_name -v
# Lint + format check (CI runs all of these against src/, tests/, and scripts/)
uv run ruff check src/ tests/ scripts/
uv run ruff format --check src/ tests/ scripts/
# Type check (ty replaces mypy here: config is [tool.ty] in pyproject.toml)
uv run ty check src/ scripts/
# Run safelint on itself + the release/build scripts + the test tree: zero
# blocking violations before merging (--all-files matches CI; without it the
# check defaults to git-modified files only). `check` accepts multiple paths
# (ruff/ty-style), so all three lint in one invocation. Per-file-ignores in
# safelint.toml keep the non-src trees honest: `scripts/**` drops the
# CLI-inherent SAFE304/SAFE203; `tests/fixtures/**` is deliberately
# non-compliant (it exists to make rules fire in the e2e tests) so it drops
# every rule; `tests/**` relaxes the structure/style rules test scaffolding
# trips (function_length, nesting_depth, logging_on_error). Per-file-ignores
# are glob-matched per file, so they still apply when the trees are passed
# together. `--fail-on=warning` matches CI's strict gate (the repo's
# safelint.toml already sets `fail_on = "warning"`, so it is explicit here
# rather than load-bearing).
uv run safelint check src/ scripts/ tests/ --all-files --fail-on=warning
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.
- 1mo ago Changed · +68 tokens per session 72bcfb885c6c
- 1mo ago First seen · 147 lines · 5,388 tokens per session scan A f2df32a6b075
safelint CLAUDE.md is an instructions file published in the GitHub repository shelkesays/safelint (7 stars, last pushed today), licensed MIT. It adds 5,456 tokens to every session, about $0.0218 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.
Other instructions, from other repositories
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
next.js AGENTS.md
AGENTS.md instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, cache eligibility and rollout and applying the notice (cutover).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode copilot-instructions.md
Copilot instructions for microsoft/vscode, covering vs code copilot instructions, project overview, root folders, core architecture (src/ folder) and built-in extensions (extensions/ folder).
deepseek-harness AGENTS.md
AGENTS.md instructions for deepseek-ai/deepseek-harness, covering agents.md, pre-stable apis and released session data, repository layout, commands and host sandbox failures.