factory-auth SKILL.md skillA
factory-auth from nonlinear-xyz/factory-kit is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add nonlinear-xyz/factory-kit/factory-auth@git:20260716.517fb94Pins git:20260716.517fb94 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- nonlinear-xyz/factory-kit
- Path
skills/factory-auth/SKILL.md- Versions recorded
- 1
- Latest version
- git:20260716.517fb94, committed Jul 16, 2026
- Size
- 14,390 bytes
- Repository stars
- 9
- License
- MIT
Auth and authorization conventions distilled across builds with three different auth stacks (Better Auth + orgs, Supabase Auth + RLS, Clerk). Covers the provider decision matrix, the unified wrapper interface (`requireAuth` / `requireRole` / `withOrgContext`), procedure tier stacking, session handling, OAuth callback safety, plugin composition with Better Auth, and the anti-patterns (hardcoded allowlists, admin client at module scope, triple-fallback auth surfaces).
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
# Factory auth Each section leads with **Principle** (one sentence, stack-agnostic), then **Why** (constraint → option → tradeoff), then **Recipe** (the shape we use), and **Failure mode** when there's one to name. Sections that are pure style with no deeper truth are marked `Recipe only`. Editors: if the Principle could appear unchanged in any auth tutorial, sharpen the Why with a Factory-specific observation or drop the section to Recipe only. ## Provider pick — match the authz model, not the familiarity **Principle.** Pick the provider whose model matches your authz shape; don't fight the provider for features it isn't built for. **Why.** Auth providers differ in what they make easy. Better Auth is org-shaped (teams, roles, invitations). Supabase Auth + RLS is row-shaped (per-row policy reasoning). Clerk is consumer-shaped (managed UI, social login). Picking the wrong shape means every authz feature is upstream — you're rebuilding the provider's missing model. The wrapper interface below makes provider a swap point, so the cost of getting this wrong is bounded — but you still pay the swap. **Recipe.** | Provider | Pick when | |---|---| …
Read the whole file at its exact version.
How to install
mdr add nonlinear-xyz/factory-kit/factory-auth@sha256:7978a719153700acThe line at the top of this page pins the label git:20260716.517fb94, 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_7fcwusl4t6l46ssx)
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Versions
The registry has recorded 1 version of this file, committed on Jul 16, 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 (14390 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
nonlinear-xyz/factory-kit · 9 stars · license MIT · pushed 2026-10-29 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_7fcwusl4t6l46ssx GET https://markdownregistry.com/api/v1/resolve?ref=nonlinear-xyz/factory-kit/factory-auth GET https://markdownregistry.com/api/v1/blob/7978a719153700ac055815ae90a52a604d450e697d1888ebab2f7359eb9ec6f8
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.