Auth0 Agent Skills is a collection of instructions that help AI coding assistants implement Auth0 authentication. Developers use the skills with compatible agents such as Claude Code, Cursor, Codex, and GitHub Copilot. The catalogue entries are the project's skills and plugins for distributing these workflows.
Borrowing it
Nothing to install: this file belongs to auth0/agent-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.
curl -O https://raw.githubusercontent.com/auth0/agent-skills/main/AGENTS.mdgit clone --depth 1 https://github.com/auth0/agent-skillsWrote 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/auth0/agent-skills/agents-md)<a href="https://agentmods.dev/instructions/auth0/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/auth0/agent-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.
<a href="https://agentmods.dev/instructions/auth0/agent-skills/agents-md"><img src="https://agentmods.dev/badge/instructions/auth0/agent-skills/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 | $0.01864 | $0.01864 |
| Opus 5.5 | $0.00746 | $0.00746 |
| Sonnet 5.5 | $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 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 — 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.
- 2mo 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 (55 stars, last pushed 7d ago), licensed Apache-2.0. It adds 1,864 tokens to every session, about $0.0075 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-skills AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| agent-skills AGENTS.mdauth0/agent-skills | Instructions file | 55 | 7d ago | Apache-2.0 | A | 1,864 | 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 |
| 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 |