Borrowing it
Nothing to install: this file belongs to YankielDBC2/codex-skills-library. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/YankielDBC2/codex-skills-library/main/AGENTS.mdgit clone --depth 1 https://github.com/YankielDBC2/codex-skills-libraryWrote 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.
[](https://agentmods.dev/instructions/yankieldbc2/codex-skills-library/agents-md)<a href="https://agentmods.dev/instructions/yankieldbc2/codex-skills-library/agents-md"><img src="https://agentmods.dev/badge/instructions/yankieldbc2/codex-skills-library/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.
<a href="https://agentmods.dev/instructions/yankieldbc2/codex-skills-library/agents-md"><img src="https://agentmods.dev/badge/instructions/yankieldbc2/codex-skills-library/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.01368 | $0.01368 |
| Opus 5.5 | $0.00547 | $0.00547 |
| Sonnet 5.5 | $0.00274 | $0.00274 |
| Haiku 4.5 | $0.00137 | $0.00137 |
Grade A, and why
codex-skills-library 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 2mo 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.
How it starts
The opening of the file, as written. The whole thing — 141 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Este repositorio es una biblioteca de skills de Codex. Mantener cambios pequenos, validados y seguros.
Proposito
Antes de editar, entiende si el cambio afecta a:
- un skill en
.agents/skills/<skill-name>/SKILL.md; - la especificacion o calidad de skills en
docs/; - los generadores y validadores en
scripts/; - el paquete estable en
plugins/skills-pack/; - los artefactos generados en
generated/oCATALOG.md.
Skill routing by default
- Before any task, choose the most specific applicable skill or skills.
- If multiple skills fit, use the smallest set that fully covers the task.
- If no exact skill fits, fall back to
token-efficient-codex-runand say so explicitly. - For unknown or stale repos, include
project-recovery-audit. - For bootstrap or takeover, use
codex-project-intake. - Do not ask the user for examples when a matching skill already exists in this repo.
Hard file-size rule
- Code-bearing files must stay at or below 400 lines.
- If a code file is approaching the limit, refactor it before it crosses 400 lines.
- If a file is already at or above 400 lines and needs refactoring, create a checkpoint first: copy the original file to a backup path or save a patch diff that can be compared or restored later.
- Keep the checkpoint until the refactor passes validation.
Stack actual
- Node.js
>=20 - ESM (
"type": "module") - npm
- Tests con
node --test - CI en GitHub Actions
- Sin dependencias runtime declaradas en
package.json
Orden de lectura
Antes de cambiar algo, lee solo lo necesario:
docs/CODEBASE_INDEX.mddocs/SKILL_SPEC.mddocs/QUALITY_RUBRIC.mddocs/SKILL_ROUTING.mdpara la politica de selection de skillsdocs/PROJECT_INTAKE.mdpara bootstrap y takeoverCONTRIBUTING.mdcuando agregues o cambies skills- El
SKILL.mdafectado y susreferences/si la tarea toca un skill concreto
Reglas del repositorio
.agents/skills/es la fuente de verdad para skills editables.plugins/skills-pack/es una copia sincronizada de los skills estables.CATALOG.mdygenerated/son artefactos generados; no se editan a mano.- Los ejemplos largos van en
references/, no dentro deSKILL.md. - Los helpers deterministas van en
scripts/. - No agregues secretos, tokens,
.env, claves privadas ni datos de cliente. - Mantiene cada skill con un solo objetivo claro.
- Si cambias metadata de skills, mantenla alineada con
docs/SKILL_SPEC.md. - Si una regla se repite, conviertela en skill, plantilla o documento reutilizable.
- Si necesitas medir mejora real, usa
docs/EFFICIENCY_SYSTEM.mdytemplates/project/EFFICIENCY_RUN.json. - Si dudas entre skills, revisa
docs/SKILL_ROUTING.mdantes de improvisar. - Usa
npm run check:locpara validar el limite de 400 lineas en archivos de codigo.
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.
- 2mo ago First seen · 141 lines · 1,368 tokens per session scan A 49986ea580b0
codex-skills-library AGENTS.md is an instructions file published in the GitHub repository YankielDBC2/codex-skills-library (13 stars, last pushed 3mo ago), licensed MIT. It adds 1,368 tokens to every session, about $0.0055 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.
codex-skills-library AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| codex-skills-library AGENTS.mdYankielDBC2/codex-skills-library | Instructions file | 13 | 3mo ago | MIT | A | 1,368 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | today | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |