OSS-Skills: Instructions file for Codex

AGENTS.md

OSS-Skills AGENTS.md is an instructions file for Codex, OpenCode from chiruu12/OSS-Skills. It costs 589 tokens per session, scanned A, original, MIT.

Instructions for a collection of 15 skills that support contributing to open-source software projects. They cover tasks such as assessing a repository, finding issues, setting up a development environment, writing tests, and submitting pull requests.

In plain words
What is it for?
Use them to evaluate repositories, find suitable issues, prepare contributions, set up local tools, write code or documentation, and check a pull request before submission.
Why use it?
They provide a repeatable path through unfamiliar open-source work, from deciding whether a project is suitable to responding to review feedback.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md.

This is chiruu12/OSS-Skills's own configuration. It tells Codex and OpenCode how to work on OSS-Skills 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 OSS-Skills configures →

Reuse

Borrowing it

Nothing to install: this file belongs to chiruu12/OSS-Skills. 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/chiruu12/OSS-Skills/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/chiruu12/OSS-Skills

Made for: Codex, OpenCode.

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 OSS-Skills AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/chiruu12/oss-skills/agents-md.svg)](https://agentmods.dev/instructions/chiruu12/oss-skills/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/chiruu12/oss-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/chiruu12/oss-skills/agents-md.svg" alt="Measured on agentmods" height="20"></a>
Per session 589 This file is loaded in full into every session.
When invoked 589 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 $0.00589 $0.00589
Opus 5 $0.00295 $0.00295
Sonnet 5 $0.00118 $0.00118
Haiku 4.5 $0.00059 $0.00059

Measured 7d ago against content hash 66f0eaf67751, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-07, from the pricing page.

Security

Grade A, and why

OSS-Skills AGENTS.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 7d 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.

AGENTS.md · 47 lines

How it starts

The opening of the file, as written. The whole thing — 47 lines — stays where its author put it; the contents beside it link to each section on GitHub.

OSS-Skills

This repo contains 15 skills for open source contribution workflows. Each skill is a structured markdown prompt in skills/*/SKILL.md.

Available skills

Evaluation:

  • skills/oss-evaluate-repo/SKILL.md - Assess repo health, governance, and community before investing time

Contribution pipeline:

  • skills/oss-find-issue/SKILL.md - Find unclaimed issues matching the user's skills
  • skills/oss-prep-to-contribute/SKILL.md - Check contribution eligibility, assess knowledge gaps
  • skills/oss-setup-dev-env/SKILL.md - Set up dev environment for unfamiliar repos (with IDE hints)
  • skills/oss-contribute/SKILL.md - Research the issue deeply, user describes logic, assist with implementation
  • skills/oss-submit-pr/SKILL.md - Pre-flight checks, review diff, user writes PR description
  • skills/oss-post-pr/SKILL.md - Decode reviewer feedback, find codebase examples of requested patterns
  • skills/oss-find-real-issues/SKILL.md - Find code problems not in the issue tracker

Contribution types:

  • skills/oss-write-tests/SKILL.md - Write tests for untested code as a standalone contribution
  • skills/oss-write-docs/SKILL.md - Contribute documentation improvements verified against source code

CI and review:

  • skills/oss-debug-ci/SKILL.md - Debug CI failures in unfamiliar repo pipelines
  • skills/oss-review-prs/SKILL.md - Review other contributors' PRs to learn and build trust

Growth:

  • skills/oss-second-contribution/SKILL.md - Plan the transition from one-off to regular contributor

Research and learning:

  • skills/oss-explore-repo/SKILL.md - Guided codebase exploration (architecture, patterns, domain language)
  • skills/oss-learn-stack/SKILL.md - Learn unfamiliar technologies from the repo's own code

Usage

Load the relevant skill file as context when the user wants to contribute to an open source project.

Evaluation: evaluate-repo -> explore-repo -> find-issue Contribution track: find-issue -> prep -> setup-dev-env -> contribute -> submit-pr -> post-pr Contribution types: write-tests or write-docs (alternatives to contribute) After merge: post-pr -> second-contribution -> review-prs Learning track: explore-repo -> learn-stack -> find-issue (or find-real-issues)

Read the full file on GitHub · 47 lines

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. 7d ago First seen · 47 lines · 589 tokens per session scan A 66f0eaf67751

Subscribe to this mod's changes

OSS-Skills AGENTS.md is an instructions file published in the GitHub repository chiruu12/OSS-Skills (62 stars, last pushed 13d ago), licensed MIT. It adds 589 tokens to every session, about $0.0029 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.

Related

Other instructions, from other repositories

codex AGENTS.md

AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.

openai/codex · 5,182 tokens

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).

microsoft/vscode · 6,785 tokens

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.

vercel/next.js · 7,296 tokens

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.

langchain-ai/langchain · 4,469 tokens

vscode oss-third-party-notices.instructions.md

Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).

microsoft/vscode · 5,001 tokens

spec-kit AGENTS.md

AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.

github/spec-kit · 7,104 tokens