Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add instructions/auth0/agent-skills/agents-mdgit clone --depth 1 https://github.com/auth0/agent-skillsWhat 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 | $0.01864 | $0.01864 |
| Opus 5 | $0.00932 | $0.00932 |
| Sonnet 5 | $0.00373 | $0.00373 |
| Haiku 4.5 | $0.00186 | $0.00186 |
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 2d 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 — 162 lines — stays where its author put it; the contents beside it link to each section on GitHub.
AGENTS.md
Guidance for AI coding agents working in this repository.
What this repo is
An Agent Skill that teaches coding assistants how to implement Auth0
authentication that follows Auth0's documented SDK usage and passes this
repo's routing and behavioral evals. It ships as a single Claude Code / Cursor / Copilot
plugin (auth0) containing one consolidated skill at
plugins/auth0/skills/auth0/: a router SKILL.md over a pool of on-demand
reference files, some of which are grouped into hub+leaf directories. The
deliverable is the skill itself.
Repository layout
plugins/auth0/skills/auth0/
├── SKILL.md # Required: the router (only file allowed in skill root)
├── references/ # On-demand docs, each reachable from SKILL.md. Every
│ # reference is a directory — framework-<name>/,
│ # feature-<name>/, tooling-<name>/, pattern-<name>/
│ # (kebab-case) — with an index.md that is either the
│ # whole reference (index-only) or a hub + document-
│ # section leaves (leaf group).
├── scripts/ # Optional: executable helpers
└── assets/ # Optional: static resources (templates, data)
evals/ # Repo-root eval harness (NOT inside the skill dir):
├── routing-cases.json # deterministic routing cases (scripts/check_routing_evals.py)
├── activation/ # activation evals — does the SKILL.md `description` fire on the
│ # right prompts and stay quiet on the wrong ones? The only layer
│ # that tests frontmatter; run it after any description edit.
└── behavioral/ # behavioral evals — run-evals.mjs drives a live agent via the
# claude CLI + execa. Kept out of the skill dir on purpose so
# this dev-only harness isn't in per-skill security-scan scope.
Key top-level docs:
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.
- 2d ago First seen · 162 lines · 1,864 tokens per session scan A 4d2164933bec
agent-skills AGENTS.md is an instructions file published in the GitHub repository auth0/agent-skills (45 stars, last pushed 4d ago), licensed Apache-2.0. It adds 1,864 tokens to every session, about $0.0093 per session on Opus 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.
Other instructions, from other repositories
spec-kit AGENTS.md
AGENTS.md instructions for github/spec-kit, covering agents.md, about spec kit and specify, quickstart — add a new integration in 5 steps, integration architecture and integrationmanifest — file tracking.
codex AGENTS.md
AGENTS.md instructions for openai/codex, covering rust/codex-rs, the codex-core crate, code review rules, crate api surface and model visible context.
vscode buildNext.instructions.md
Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).
langchain AGENTS.md
AGENTS.md instructions for langchain-ai/langchain, covering global development guidelines for the langchain monorepo, corridor security analysis, project architecture and context, monorepo structure and development tools & commands.
vscode oss-third-party-notices.instructions.md
Instructions for microsoft/vscode, covering vs code oss third-party-notices pipeline, architecture, pipeline flow in ci, applying the notice (cutover) and fallback chain (never fail the build).
next.js AGENTS.md
Instructions for vercel/next.js, covering next.js development guide, codebase structure, monorepo overview, core package: packages/next and other important packages.