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skills: Instructions file for Codex

AGENTS.md

skills AGENTS.md is an instructions file for Codex, OpenCode from eliasstravik/skills. It costs 1,149 tokens per session, scanned A, original, MIT.

Repository instructions for eliasstravik/skills, a personal library of nine AI-agent skills and their evaluation files. An evaluation checks how well a skill performs against defined examples.

In plain words
What is it for?
Use them when adding or changing a skill, organizing evaluation prompts and fixtures, or keeping generated test results out of the published skill files.
Why use it?
They explain which files are shipped to users, which are only test material, and how skills should be developed and checked.

Instructions file for CodexOpenCode

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

This is eliasstravik/skills's own configuration. It tells Codex and OpenCode how to work on 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 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/eliasstravik/dev/skills.

not rated 22repo changed 15d ago A scan 1,149 tokens original MIT
View source ↗ eliasstravik/skills
Reuse

Borrowing it

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

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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README.md
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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/eliasstravik/skills/agents-md"><img src="https://agentmods.dev/badge/instructions/eliasstravik/skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>
Per session 1,149 This file is loaded in full into every session.
When invoked 1,149 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 $0.01149 $0.01149
Opus 5.5 $0.00460 $0.00460
Sonnet 5.5 $0.00230 $0.00230
Haiku 4.5 $0.00115 $0.00115

Measured 15d ago against content hash bd285b7a9609, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

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 15d 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 · 101 lines

How it starts

The opening of the file, as written. The whole thing — 101 lines — stays where its author put it; the contents beside it link to each section on GitHub.

skills — repo conventions

The personal library contains eleven skills (autoconsultant, automake, consultant, consulting, copywriting, demo, first-principles, html, midwit, skill-issue, voice-mode), built on skill-creator (process authority: evals, baselines, viewer review, iteration, description optimization) and skill-issue (form authority: skills as SOPs—five types, nine sections, an admission gate, the bitter-lesson litmus, and vendor ceilings). The original eight were rebuilt in ~/dev/skills-new and ported here wholesale.

Layout

  • skills/<name>/ — shipping surface. Everything committed here reaches installers verbatim (npx skills add has no .skillignore). Nothing goes in a skill dir except what installers should receive.
  • evals/<name>/ — committed eval sources for that skill: prompts (evals.json), assertions, fixtures (fixtures/).
  • evals/<name>/runs/ and skills/*-workspace/ — generated evidence (run output, transcripts, benchmarks, viewer HTML). Gitignored, never committed.

Process

  • Skills are built with the vanilla skill-creator loop: with-skill vs no-skill baseline runs, graded assertions, eval viewer review, iterate until the client is happy / feedback is empty / progress stalls; then description optimization (trigger evals, run_loop.py), whose best_description is applied verbatim.
  • skill-issue governs form: every skill is one of five SOP types and carries nine ordered sections; admission and every body line pass the bitter-lesson gate, with overflow to references/scripts and vendor ceilings. Existing skills predate this standard and are not retrofitted unless explicitly scoped.
  • agentskills validate is not available on npm → the shipping gate is a recorded manual frontmatter check per skill (name/format only; the description field is owned by the trigger-eval optimizer and is never rewritten by hand).

Declared deviations from skill-creator's default

evals.json, assertions, and fixtures live in evals/<name>/, never inside skills/<name>/. skill-creator's default puts evals/ inside the skill folder, but this repo's installer ships everything committed under skills/<name>/ verbatim, so eval material there would ship to all agents.

Read the full file on GitHub · 101 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. 15d ago Changed · +1 lines · +5 tokens per session bd285b7a9609
  2. 28d ago Changed · +3 tokens per session 168dcfe8aa58
  3. 2mo ago First seen · 100 lines · 1,141 tokens per session scan A 5131f7f016ea

Subscribe to this mod's changes

skills AGENTS.md is an instructions file published in the GitHub repository eliasstravik/skills (22 stars, last pushed 13d ago), licensed MIT. It adds 1,149 tokens to every session, about $0.0046 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.

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

skills AGENTS.md next to 6 instructions from other repositories
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skills AGENTS.mdeliasstravik/skillsInstructions file2213d agoMITA1,149Codex, OpenCode
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vscode copilot-instructions.mdmicrosoft/vscodeInstructions file195ktodayMITA3,093GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harnessInstructions file275k3d agoMITA4,313Codex, OpenCode