What is warden-skills AGENTS.md?

A set of instructions for creating skills for Warden, a tool that discovers and runs reusable instructions in software projects. It defines the required folder layout, naming rules, and installation commands.

Use it when adding or maintaining Warden skills, checking their required files, installing the authoring tools, or running the Warden command-line tool.

It prevents skills from being missed or rejected because they use the wrong name, directory structure, or setup process.

How getsentry/warden-skills configures Codex and OpenCode

Reuse

Borrowing it

Nothing to install: this file belongs to getsentry/warden-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/getsentry/warden-skills/main/AGENTS.md

Clone the repo

git clone --depth 1 https://github.com/getsentry/warden-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.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/getsentry/warden-skills/agents-md/github.svg)](https://agentmods.dev/instructions/getsentry/warden-skills/agents-md)

Your own site

<a href="https://agentmods.dev/instructions/getsentry/warden-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/getsentry/warden-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.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/getsentry/warden-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/getsentry/warden-skills/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 1,472 This file is loaded in full into every session.

When invoked 1,472 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.

Model	Per session	Once invoked
Fable 5.1	$0.01472	$0.01472
Opus 5.5	$0.00589	$0.00589
Sonnet 5.5	$0.00294	$0.00294
Haiku 4.5	$0.00147	$0.00147

Measured 2mo ago against content hash 7aff36dbd663, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

warden-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 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.

AGENTS.md · 110 lines

How it starts

The opening of the file, as written. The whole thing — 110 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Agent Instructions

This repository hosts generalized Warden skills consumed remotely by other projects.

Layout

skills/
└── wrdn-<skill-name>/
    ├── SKILL.md           # Required. Frontmatter + analysis instructions
    ├── references/        # Optional. Long-form context loaded on demand
    └── scripts/           # Optional. Helper scripts the skill invokes

Warden discovers skills at skills/<name>/SKILL.md automatically. No registry file or build step.

Naming

Every skill in this repo MUST be prefixed wrdn-. The prefix keeps these skills identifiable when mixed with skills from other sources in a consumer's warden.toml (e.g., wrdn-authz, wrdn-dependency-audit). The frontmatter name must match the directory exactly, prefix included.

Tooling

Install once after cloning:

pnpm install                          # Installs @sentry/warden (pinned in package.json)
pnpx @sentry/dotagents install         # Installs authoring skills into .agents/skills/

The warden CLI is a devDependency. Run it via pnpm exec warden ... or ./node_modules/.bin/warden .... Authoring skills from getsentry/skills are declared in agents.toml; installed under .agents/skills/ (gitignored).

pnpx @sentry/dotagents add <src> <skill>    # Add a new authoring skill
pnpx @sentry/dotagents list                 # Show what's installed

Skills

/skill-writer — Always use when creating or updating a skill in skills/. It enforces the Agent Skills spec (frontmatter, depth gates, source capture, validation).

Commit, PR, and iteration skills are installed system-wide; they aren't vendored here.

Authoring Workflow

When adding or editing a skill, start with /skill-writer. Don't write SKILL.md by hand. The skill-writer enforces the spec, captures sources, and validates the output.

Commit Attribution

AI commits MUST include:

Co-Authored-By: <model name> <[email protected]>

Read the full file on GitHub · 110 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.

2mo ago First seen · 110 lines · 1,472 tokens per session scan A 7aff36dbd663

Subscribe to this mod's changes

warden-skills AGENTS.md is an instructions file published in the GitHub repository getsentry/warden-skills (58 stars, last pushed 23d ago), licensed MIT. It adds 1,472 tokens to every session, about $0.0059 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.

tag-production

warden-skills AGENTS.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
warden-skills AGENTS.mdgetsentry/warden-skills	Instructions file	58	23d ago	MIT	A	1,472	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	yesterday	MIT	A	7,461	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
vscode ai-customization.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	1,907	GitHub Copilot

warden-skills: Instructions file for Codex