agent-skills: Instructions file for Codex

AGENTS.md

agent-skills AGENTS.md is an instructions file for Codex, OpenCode from VertaaUX/agent-skills. It costs 322 tokens per session, scanned A, original, MIT.

A set of project instructions for maintaining AGENTS.md files and shared project knowledge. It explains what to read before substantial work and what durable discoveries to record afterward.

In plain words
What is it for?
Use it when starting non-trivial work in the agent-skills project, searching its shared wiki, or recording reusable project knowledge.
Why use it?
It gives coding agents consistent project context and a way to preserve useful decisions and lessons between sessions.

Instructions file for CodexOpenCode

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

This is VertaaUX/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 →

Not installable: its command points at a path on the author’s own machine, so it runs nowhere else. The line is /Users/petrilahdelma/SAPDevelop/llm-wiki.

Reuse

Borrowing it

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

agentmods badge for agent-skills AGENTS.md

README.md
[![agentmods](https://agentmods.dev/badge/instructions/vertaaux/agent-skills/agents-md/github.svg)](https://agentmods.dev/instructions/vertaaux/agent-skills/agents-md)
Your own site
<a href="https://agentmods.dev/instructions/vertaaux/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/vertaaux/agent-skills/agents-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.

agentmods 80×15 button for agent-skills AGENTS.md

Your own site · 80×15
<a href="https://agentmods.dev/instructions/vertaaux/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/vertaaux/agent-skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 322 This file is loaded in full into every session.
When invoked 322 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 $0.00322 $0.00322
Opus 5.5 $0.00129 $0.00129
Sonnet 5.5 $0.00064 $0.00064
Haiku 4.5 $0.00032 $0.00032

Measured 1mo ago against content hash d8dcc49afacd, 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 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.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

AGENTS.md · 20 lines

What it actually says

AGENTS.md

Project-specific agent instructions can be added here. The shared cross-project memory contract is below.

Cross-project LLM-wiki

This repo participates in the shared LLM-wiki at /Users/petrilahdelma/SAPDevelop/llm-wiki.

Read before non-trivial work:

  • Start with a compact project memory packet: /Users/petrilahdelma/SAPDevelop/llm-wiki/wiki/tools/llm-wiki-context.mjs --project "agent-skills" --query "<task or topic>".
  • For broader retrieval, search adjacent concepts with /Users/petrilahdelma/SAPDevelop/llm-wiki/wiki/tools/qmd-query.sh "agent-skills <task or topic>".
  • Open relevant pages under /Users/petrilahdelma/SAPDevelop/llm-wiki/wiki before deciding.

Write after durable discoveries:

  • Capture decisions, reusable gotchas, cross-project patterns, source summaries, and project-state changes with /Users/petrilahdelma/SAPDevelop/llm-wiki/wiki/tools/llm-wiki-capture.mjs --project "agent-skills" --kind decision --title "<title>" --summary "<what changed and why>".
  • Do not capture secrets, raw logs, transient TODOs, or live coordination state.
  • Do not edit compiled wiki pages from this repo. Capture first; the LLM-wiki ingest pass will file it into entities, concepts, patterns, or synthesis.
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 · 20 lines · 322 tokens per session scan A d8dcc49afacd

Subscribe to this mod's changes

agent-skills AGENTS.md is an instructions file published in the GitHub repository VertaaUX/agent-skills (2 stars, last pushed 4mo ago), licensed MIT. It adds 322 tokens to every session, about $0.0013 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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