skill-zoo: Instructions file for Codex

AGENTS.md

skill-zoo AGENTS.md is an instructions file for Codex, OpenCode from luochang212/skill-zoo. It costs 3,386 tokens per session, scanned C, original, MIT.

Repository instructions for the skill-zoo project, a collection or system for developing skills for coding agents. They explain the project's working principles, structure, and design decisions.

In plain words
What is it for?
Use them when contributing to this project to understand its layout and conventions, state assumptions, assess trade-offs, and modify only the code needed for the requested change.
Why use it?
They help contributors make deliberate, small changes without adding unnecessary complexity or silently choosing between unclear interpretations. They also emphasize checking risks and side effects before editing.

Instructions file for CodexOpenCode

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

This is luochang212/skill-zoo's own configuration. It tells Codex and OpenCode how to work on skill-zoo 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 skill-zoo configures →

Reuse

Borrowing it

Nothing to install: this file belongs to luochang212/skill-zoo. 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/luochang212/skill-zoo/main/AGENTS.md
Clone the repo
git clone --depth 1 https://github.com/luochang212/skill-zoo

Made for: Codex, OpenCode.

Wrote this? Show the measurements

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Per session 3,386 This file is loaded in full into every session.
When invoked 3,386 The same file — it is already loaded in full.
Security scan C 1 finding. 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 $0.03386 $0.03386
Opus 5.5 $0.01354 $0.01354
Sonnet 5.5 $0.00677 $0.00677
Haiku 4.5 $0.00339 $0.00339

Measured today against content hash 8cc9ba29ccd2, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade C, and why

skill-zoo AGENTS.md scanned grade C with 1 finding 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 today.

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.

Recursive force deletehighDestructive command

rm -rf with a variable or a broad path is one typo away from removing the wrong tree.

rm -rf node_modules/.vite && bun run dev
AGENTS.md · 174 lines

How it starts

The opening of the file, as written. The whole thing — 174 lines — stays where its author put it; the contents beside it link to each section on GitHub.

AGENTS.md

How We Work

Weigh benefits against side effects. When making a choice, consider whether the benefits outweigh the side effects.

Aesthetics and elegance matter. Beauty is a form of productivity.

Reason from first principles. Strip problems to verifiable facts, then reason upward. "That's how it's done" is not a fact.

Think before you write. State your assumptions. Surface tradeoffs. If there are multiple interpretations, lay them all out — don't silently pick one. If something is unclear, stop and ask. Before any change, ask: Will this introduce a bug? Is this more complex than it needs to be? Do the benefits outweigh the side effects?

Solve with minimal code. Don't add features no one asked for. Don't build abstractions for single-use paths. Don't write error handling for scenarios that can't happen. Don't add "configurability" no one requested. Every extra layer, dependency, or indirection must earn its keep — expressing more with less code is cool.

Touch only what you must. Don't refactor adjacent code. Don't fix formatting you didn't break. Match the existing style, even if you'd write it differently. Only remove imports that your changes made unused.

Consistency is load-bearing. Layers that assume different realities pass local checks but fail globally. A foundation that shifts before the structure above settles doesn't enable iteration — it guarantees rot. When a design decision changes, find every place that assumed the old one — stale code is a bug that hasn't manifested yet.

Verify before claiming done. Don't say you ran something if you didn't. If you can't verify, say so.

Prefer the latest stable. When choosing dependency versions, use the latest stable release.

Recognize local optima. When a series of incremental changes reveals that a broader refactor would yield a better outcome, stop and ask the user before proceeding.

Branch Canonicality

main is the canonical development line; CI runs on every push and PR to it. next/own-protocol has been fast-forwarded back into main. next/curated is the 0.3.56 compatibility experiment (v0.3.56-beta.4 local tag) and next/verified-baselines is the frozen 0.3.56 prerelease experiment; both are reference-only.

Read the full file on GitHub · 174 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. today Changed · +12 lines · +760 tokens per session 8cc9ba29ccd2
  2. yesterday Changed · +17 lines · +214 tokens per session 5f84ed81cbde
  3. 2d ago Changed · +8 lines · +210 tokens per session c79bcdce86a3
  4. 12d ago Changed · +2 tokens per session 8c56c5cc6415
  5. 1mo ago Changed · +8 lines · +244 tokens per session 64dfa9b16389
  6. 1mo ago First seen · 129 lines · 1,956 tokens per session scan C 5508e6a545ec

Subscribe to this mod's changes

skill-zoo AGENTS.md is an instructions file published in the GitHub repository luochang212/skill-zoo (123 stars, last pushed today), licensed MIT. It adds 3,386 tokens to every session, about $0.0135 per session on Opus 5.5. A static security scan graded it C with 1 finding (recursive force delete). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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