Home / coco-research / coco · GitHub

identity-federation SKILL.md skillA

identity-federation from coco-research/coco is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add coco-research/coco/identity-federation@git:20260914.480426e

Pins git:20260914.480426e in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: coco-research/coco
Path: systems/reverse-skill/skills/identity-federation/SKILL.md
Versions recorded: 1
Latest version: git:20260914.480426e, committed Sep 14, 2026
Size: 1,127 bytes
Repository stars: 797
License: a license file GitHub does not identify

Use for authorized assessment of federated identity systems including SAML, OIDC, OAuth2 flows, SSO misconfiguration, and token confusion issues.

Collected from public GitHub. Every version is saved exactly as it was and never changes. Install it at an exact version with the mdr tool, and every file is checked before it reaches your agent. The main file is checked against the SHA-256 fingerprint recorded here, and the others against the fingerprints GitHub keeps for its source commit. The automatic checks below grade the latest version, and the same checks always give the same file the same grade.

What the file says

# Identity Federation (SAML / OIDC / OAuth)

## 适用场景

- SAML Response 签名/断言篡改面（经典缺陷模式）
- OIDC 隐式/授权码 + PKCE 缺失
- redirect_uri / state / nonce 问题
- IdP 与 SP 元数据、多租户 issuer 混淆
- 与 `api-security` JWT 攻击互补（本 skill 偏联邦与 SSO 流）

## 工作流

```text
□ 画清：User → SP → IdP → Token → SP
□ 收集：/.well-known/openid-configuration、SAML metadata
□ 检查：redirect_uri 精确匹配、state 绑定、PKCE
□ 检查：SAML 签名覆盖范围、algorithm 降级
□ 会话固定与登出失效
```

## 工具链

| 工具 | 用途 |
|------|------|
| Burp + SAML Raider 等 | 断言编辑（授权） |
| jwt_tool | JWT 段 |
| 浏览器 DevTools | 重定向链 |
| IdP 管理日志 | 审计 |

## 参考

- `references/sso-flow-checklist.md`
- `../api-security/` `../windows-ad/`（企业 IdP）

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add coco-research/coco/identity-federation@sha256:8f5ec6529281ab2b

The line at the top of this page pins the label git:20260914.480426e, which is what most people want. This one pins the sha256 fingerprint of the contents instead, so it survives a label being moved. Either way the exact version is written to mdr.lock, and mdr install downloads and checks those contents again, so it installs them exactly or stops with an error.

Badge

[![mdr](https://markdownregistry.com/badge/art_ydol7girgbe2zzxh.svg)](https://markdownregistry.com/a/art_ydol7girgbe2zzxh)

4 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 1 version of this file, committed on Sep 14, 2026.

version	committed	commit	size	audit
git:20260914.480426e latest	2026-09-14	480426e	1,127 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (1127 bytes)
pass: No zero-width or bidi control characters
pass: No instruction hidden inside an HTML comment
pass: No link to an exfiltration or paste host
pass: No credential-shaped string
pass: No instruction to send local credentials anywhere
pass: No text hidden with inline styles
pass: No prompt-injection phrasing
pass: No curl or wget piped into a shell
pass: No recursive delete of root, home or parent
pass: No instruction to read or print local credentials
pass: No base64 blob over 200 characters
pass: No link to a raw IP address
pass: No script tag

Source

GitHub

coco-research/coco · 797 stars · license a license file GitHub does not identify · pushed 2026-11-05 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_ydol7girgbe2zzxh
GET https://markdownregistry.com/api/v1/resolve?ref=coco-research/coco/identity-federation
GET https://markdownregistry.com/api/v1/blob/8f5ec6529281ab2bbffdee5ba4fa26e671e1932bf9664bf7e0e0880e73aed7d8

Your AI assistant does the legwork. You hear about the deals worth your word. Hand yours the standing instructions at modelranch.com and it joins the network that reads files like this one.

Guides: the SKILL.md format and its required fields · what to check before you install a skill · how to pin a skill to an exact version · where to find agent skills · keeping a team on the same skills · which agent file does what.

More from coco-research/coco

AGENTS.md AGENTS.md file

coco-research/coco · AGENTS.md

git:20261007.61dca6d · audit A · 797 stars

create-rule SKILL.md skill

coco-research/coco · adapters/cursor/skills/create-rule/SKILL.md · Create Cursor rules for persistent AI guidance. Use when the user wants to create a rule, add coding standards, set up…