build-nextjs-backend SKILL.md skillB
This file is byte-identical to the first copy the registry indexed, one of 3 indexed copies. Same content hash, so the same checks give both the same grade.
build-nextjs-backend from velimirmueller/claude-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add velimirmueller/claude-skills/build-nextjs-backend@git:20261009.d042141Pins git:20261009.d042141 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- B, 16 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- velimirmueller/claude-skills
- Path
skills/backend/build-nextjs-backend/SKILL.md- Versions recorded
- 2
- Latest version
- git:20261009.d042141, committed Oct 9, 2026
- First version recorded
- Oct 9, 2026
- Size
- 8,886 bytes
- Repository stars
- 5
- License
- MIT
Use when building or reviewing the server side of a Next.js 16 App Router app — a server-only data access layer that authorizes every call, Server Actions as public endpoints, route handlers, caching with Cache Components, proxy.ts, env validation and error boundaries.
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
# Build a Next.js Backend
Next.js is the backend here: Server Components read, Server Actions write, route handlers serve webhooks and external clients. The rule that organizes everything: **authorization lives next to the data, in a `server-only` layer, and runs on every call.** Pages, actions and `proxy.ts` do not carry it.
## 1. Audit current state
Read `.claude/stack-profile.md` (`frontend.meta: next`, `backend.track`, `database`, `hosting`). Then:
```bash
grep -n '"next"\|"react"\|"typescript"' package.json; ls middleware.ts src/middleware.ts proxy.ts src/proxy.ts 2>/dev/null
grep -n "cacheComponents\|partialPrefetching\|allowedOrigins" next.config.*
grep -rln "'use server'\|\"use server\"" src | xargs -I{} sh -c 'echo "== {}"; grep -c "getViewer\|requireViewer\|auth()" {}' # actions with 0 = no auth check
grep -rn "process.env" src --include=*.ts --include=*.tsx | grep -v "src/libs/env\|src/server/env" # raw env reads
grep -rn "from '@supabase/supabase-js'\|createClient(" src | grep -v "src/libs/supabase" # clients outside the seam
…Read the whole file at its exact version.
How to install
mdr add velimirmueller/claude-skills/build-nextjs-backend@sha256:8f2e6ed27a8705c2The line at the top of this page pins the label git:20261009.d042141, 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_awklyabzdendxc7w)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, all committed on Oct 9, 2026.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261009.d042141 latest | 2026-10-09 | d042141 | 8,886 B | B | view · diff |
| git:20261009.e2b6168 | 2026-10-09 | e2b6168 | 8,757 B | B | view |
Audit of the latest version
- fail: No instruction to read or print local credentials (matched: read as literal `process.env)
- pass: Frontmatter block present
- pass: Frontmatter declares a name
- pass: Frontmatter declares a description
- pass: Size between 200 bytes and 200 KB (8886 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 base64 blob over 200 characters
- pass: No link to a raw IP address
- pass: No script tag
Starting a new one? Use a template for SKILL.md on mdpantry, which passes every one of these checks and says what to change in it.
Source
velimirmueller/claude-skills · 5 stars · license MIT · pushed 2026-10-12 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_awklyabzdendxc7w GET https://markdownregistry.com/api/v1/resolve?ref=velimirmueller/claude-skills/build-nextjs-backend GET https://markdownregistry.com/api/v1/blob/8f2e6ed27a8705c2ddb60288955be2ee72b7a01d68ad091c1951bfd0fb2f8df3
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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