agent-skills: Instructions file for Codex

AGENTS.md

agent-skills AGENTS.md is an instructions file for Codex, OpenCode from PracticalSwan/agent-skills. It costs 6,315 tokens per session, scanned A, original, MIT.

A set of instructions for AI agents working in a shared skills repository. It defines required startup reading, validation, syncing, and publishing steps.

In plain words
What is it for?
Use it to guide sessions that update the repository, including reading required context, running validation, syncing changes, and publishing satisfactory work.
Why use it?
It gives agents a consistent process for making and completing repository changes. An agent is an AI tool that can inspect or modify files on a user's behalf.

Instructions file for CodexOpenCode

Written for Codex and OpenCode: the file is AGENTS.md. Also seen: mentions CLAUDE.md; mentions Claude Code; mentions AGENTS.md.

This is PracticalSwan/agent-skills's own configuration. It tells Codex and OpenCode how to work on agent-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 agent-skills configures →

Reuse

Borrowing it

Nothing to install: this file belongs to PracticalSwan/agent-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/PracticalSwan/agent-skills/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/PracticalSwan/agent-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.

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README.md
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Your own site
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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/practicalswan/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/practicalswan/agent-skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 6,315 This file is loaded in full into every session.
When invoked 6,315 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 $0.06315 $0.06315
Opus 5.5 $0.02526 $0.02526
Sonnet 5.5 $0.01263 $0.01263
Haiku 4.5 $0.00632 $0.00632

Measured 19d ago against content hash bab6edbc4e9b, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

agent-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 19d 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 · 533 lines

How it starts

The opening of the file, as written. The whole thing — 533 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

This repository contains shared skills for GitHub Copilot, Claude Code, and Codex, and this file defines the workspace-specific rules that should apply to any AI agent operating in C:\Users\LOQ\.copilot\skills.

Required Session Start Rule

  • Every new session in this workspace must begin by reading LESSON.md.
  • Treat LESSON.md as required startup context before analysis, planning, edits, validation, reviews, or advisory work.
  • If LESSON.md is missing or unreadable, stop and report that blocker before continuing.

Required Completion, Sync, And Publish Rule

  • For every user-requested mutation task in this workspace, complete the requested work in C:\Users\LOQ\.copilot\skills first.
  • After the work is complete, run the repo validation, then sync outward to the downstream skill folders every time.
  • If the AI agent judges the result satisfactory, commit and push to GitHub without asking for another confirmation.
  • Treat work as satisfactory only when validation passes, sync completes, the task is complete, no requested step was skipped, no required command was rejected, no unresolved secret/security/privacy issue remains, and the final diff matches the user's request.
  • Elevate to the user before commit or push when there are security concerns, incomplete work, skipped steps, rejected or blocked required commands, validation/sync failures, unexpected unrelated dirty files that make staging unsafe, or any other reason the work is not satisfactory.
  • For read-only or advisory tasks with no file changes, do not create empty sync, commit, or push churn; report that no mutation workflow was needed.

Workspace Role

  • Main branch: C:\Users\LOQ\.copilot\skills
  • New maintained skills must be added or imported here first.
  • Maintained skills live here and are synced outward to downstream targets.
  • Copied official superpowers are tracked here for discovery and cross-client sync, but they are not maintained the same way as the catalog's maintained skills.

Read the full file on GitHub · 533 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. 19d ago Changed · +35 lines · +480 tokens per session bab6edbc4e9b
  2. 1mo ago Changed · +41 lines · +574 tokens per session cb93d13db426
  3. 1mo ago Changed · +25 lines · +361 tokens per session a92b13331ec8
  4. 2mo ago Changed · +40 lines · +491 tokens per session 397c8f7f3b70
  5. 2mo ago Changed · +25 lines · +341 tokens per session d14cd6554e16
  6. 2mo ago Changed · +12 lines · +156 tokens per session da65b10a8b27
  7. 2mo ago First seen · 355 lines · 3,912 tokens per session scan A 2bc1ae6215cc

Subscribe to this mod's changes

agent-skills AGENTS.md is an instructions file published in the GitHub repository PracticalSwan/agent-skills (24 stars, last pushed 20d ago), licensed MIT. It adds 6,315 tokens to every session, about $0.0253 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.

Related

agent-skills AGENTS.md compared with instructions from other repositories

agent-skills AGENTS.md next to 6 instructions from other repositories
ModTypeStarsLast pushLicenceScanTokensWorks with
agent-skills AGENTS.mdPracticalSwan/agent-skillsInstructions file2420d agoMITA6,315Codex, OpenCode
vscode buildNext.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA9,719GitHub Copilot
vscode oss-third-party-notices.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA5,516GitHub Copilot
next.js AGENTS.mdvercel/next.jsInstructions file143ktodayMITA7,461Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchainInstructions file149ktodayMITA4,680Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA3,093GitHub Copilot
vscode model-prompts.instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA2,022GitHub Copilot