Borrowing it
Nothing to install: this file belongs to itsmostafa/gskill. 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/itsmostafa/gskill/main/CLAUDE.mdgit clone --depth 1 https://github.com/itsmostafa/gskillWrote 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/itsmostafa/gskill/claude-md)<a href="https://agentmods.dev/instructions/itsmostafa/gskill/claude-md"><img src="https://agentmods.dev/badge/instructions/itsmostafa/gskill/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/itsmostafa/gskill/claude-md"><img src="https://agentmods.dev/badge/instructions/itsmostafa/gskill/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 | $0.01205 | $0.01205 |
| Opus 5.5 | $0.00482 | $0.00482 |
| Sonnet 5.5 | $0.00241 | $0.00241 |
| Haiku 4.5 | $0.00120 | $0.00120 |
Grade A, and why
gskill 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 — 87 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
gskill automatically learns repository-specific skills for coding agents via evolutionary search. It:
- Loads SWE-smith tasks for a target GitHub repository
- Optionally generates an initial
SKILL.mdvia gpt-5.2 using the repo's README and config files - Uses GEPA (evolutionary prompt optimization) with mini-SWE-Agent to iteratively improve the skill
- Saves the best-scoring
SKILL.mdto.claude/skills/<repo>/SKILL.md
Project Management
This project uses uv for Python package and environment management (Python 3.13). Do not use pip, python, or manual venv activation directly.
uv run main.py <repo-url> # Run the main pipeline
uv add <package> # Add a dependency
uv remove <package> # Remove a dependency
uv sync # Install dependencies from lockfile
uv run pytest # Run tests
uv run ruff check . # Lint
uv run ruff format . # Format
A Taskfile.yml (requires Task) provides shortcuts for common operations:
task sync # uv sync
task lint # ruff check
task format # ruff format
task test # pytest
task run -- owner/repo # gskill run (pass args via CLI_ARGS)
task tasks # gskill tasks (pass args via CLI_ARGS)
Entry Point & CLI
main.py is the CLI entry point (registered as the gskill script). It exposes two Typer commands:
gskill run <repo-url>— run the full optimization pipeline--output-dir/-o: where to writeSKILL.md(default:.claude/skills)--max-evals/-n: GEPA evaluation budget (default: 150)--no-initial-skill: skip gpt-5.2 seed generation, start GEPA from empty--agent-model/-m: LiteLLM model string for mini-SWE-agent (e.g.openai/gpt-5.2); falls back toGSKILL_AGENT_MODELenv var, thenopenai/gpt-5.2
gskill tasks <owner/repo>— list available SWE-smith tasks for a repo--limit/-l: number of tasks to show (default: 10)--list: list all tasks up to limit
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 First seen · 87 lines · 1,205 tokens per session scan A b61b404183b7
gskill CLAUDE.md is an instructions file published in the GitHub repository itsmostafa/gskill (34 stars, last pushed 6mo ago), licensed MIT. It adds 1,205 tokens to every session, about $0.0048 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 2026-08-30.
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.