auth SKILL.md skillA
auth from martinolivero/saas-builder is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add martinolivero/saas-builder/auth@git:20261007.f2beefePins git:20261007.f2beefe in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- martinolivero/saas-builder
- Path
skills/auth/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261007.f2beefe, committed Oct 7, 2026
- First version recorded
- Jun 6, 2026
- Size
- 6,229 bytes
- Repository stars
- 4
- License
- MIT
This skill should be used when adding authentication or authorization to an app or SaaS — login, signup, sessions, tokens, roles, permissions, multi-tenant access, SSO, or social login. Trigger phrases include "add login", "add auth", "sign in with Google", "protect this route", "user roles", "admin permissions", "JWT or sessions", "which auth provider", "RBAC", "multi-tenant access", "who can see what", "magic link", "SSO". It picks the right provider and pattern instead of rolling auth from…
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 This skill makes the two decisions every SaaS gets wrong: **which auth provider** and **how to model permissions**. It picks a vetted provider over hand-rolled auth, and a permission model that fits the product. Analogy: auth is the lock and the guest list for your building. You don't forge your own lock (you'd leave it pickable) — you buy a good one and decide who gets which key. ## The one rule **Don't roll your own auth.** Password hashing, session rotation, OAuth flows, and reset tokens are where subtle, catastrophic bugs live. Use a provider or a battle-tested library. (Pairs with the `secure-coding` skill, which covers the OWASP auth-failure defenses.) ## Discovery (max 3 questions, only if unknown) 1. Is this B2C (individual users) or B2B (organizations/teams with members)? 2. Do you need enterprise SSO (SAML/OIDC) for buyers — now or soon? 3. What's the stack/backend — Supabase, plain Vercel + Postgres, or full-stack TypeScript? ## Step 1 — Pick the provider (decision tree) | Situation | Use | Why | | --- | --- | --- | …
Read the whole file at its exact version.
How to install
mdr add martinolivero/saas-builder/auth@sha256:10acc0e4f4d235baThe line at the top of this page pins the label git:20261007.f2beefe, 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_pionqqpj72y2s3sd)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Jun 6, 2026 and Oct 7, 2026, about one every 62 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261007.f2beefe latest | 2026-10-07 | f2beefe | 6,229 B | A | view · diff |
| git:20260606.2c6841e | 2026-06-06 | 2c6841e | 4,974 B | A | view · diff |
| git:20260606.1d02dd6 | 2026-06-06 | 1d02dd6 | 4,504 B | A | view |
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 (6229 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
martinolivero/saas-builder · 4 stars · license MIT · pushed 2026-10-11 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_pionqqpj72y2s3sd GET https://markdownregistry.com/api/v1/resolve?ref=martinolivero/saas-builder/auth GET https://markdownregistry.com/api/v1/blob/10acc0e4f4d235ba3773ffd97f6e1c03ebbc66ce07d68192615e33472e25b41e
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.
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