auth-design SKILL.md skillA
auth-design from okhp3/skillz is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add okhp3/skillz/auth-design@git:20260828.866dec6Pins git:20260828.866dec6 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- okhp3/skillz
- Path
community/auth-design/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260828.866dec6, committed Aug 28, 2026
- Size
- 5,696 bytes
- Repository stars
- 3
- License
- MIT
Designs how a system knows who someone is and what they may do — login, sessions, tokens, roles, and permission checks. Use this whenever the user is building login or signup, adding roles or permissions, choosing between sessions and JWTs, integrating OAuth or SSO, or asking how to protect an endpoint. For finding authorization bugs in code that exists, use security-analysis.
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
# Auth design Two separate problems, constantly conflated, with different failure modes: - **Authentication:** who is this? Mature, well-solved, and you should use a library - **Authorization:** what may they do? Application-specific, and where nearly all real breaches originate Teams spend most of their effort on the first because it is visible, and most of their vulnerabilities live in the second. **Object-level authorization is the one to get right.** ## 1. Do not build authentication from scratch Password handling, session fixation, timing attacks, reset flows, and MFA are all solved and all easy to get subtly wrong. Use the platform's framework, or an identity provider. If you are storing passwords yourself, use argon2id or bcrypt with the current cost parameters, never a general-purpose hash, never with a hand-rolled salt. The flows people forget to secure, which are attacked precisely because they are afterthoughts: password reset, email change, account recovery, and MFA enrolment. A reset flow is a login bypass if the token is guessable, does not expire, or is reusable. **Done when:** every path that can establish a session has been enumerated and secured. …
Read the whole file at its exact version.
How to install
mdr add okhp3/skillz/auth-design@sha256:d18ba388a20c1852The line at the top of this page pins the label git:20260828.866dec6, 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.
[](https://markdownregistry.com/a/art_xwwvu5vygcdrc2y2)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 28, 2026.
Audit of the latest version
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (5696 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
okhp3/skillz · 3 stars · license MIT · pushed 2026-11-06 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_xwwvu5vygcdrc2y2 GET https://markdownregistry.com/api/v1/resolve?ref=okhp3/skillz/auth-design GET https://markdownregistry.com/api/v1/blob/d18ba388a20c185253f2419a72c9f8fc043a26595b380998987970a4c18db1c0
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.