nextcore-dev SKILL.md skillA
nextcore-dev from kennetvn/nextcore-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add kennetvn/nextcore-skills/nextcore-dev@git:20261031.5e13a1dPins git:20261031.5e13a1d in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- kennetvn/nextcore-skills
- Path
plugins/nextcore-dev/skills/nextcore-dev/SKILL.md- Versions recorded
- 3
- Latest version
- git:20261031.5e13a1d, committed Oct 31, 2026
- First version recorded
- Oct 3, 2026
- Size
- 10,350 bytes
- Repository stars
- 4
- License
- MIT
The development contract that makes design and code meet. Use when building or changing an API route, a form/mutation, a schema or migration, raw SQL, a cache/ETag/revalidation path, a background job, a production data fix, an Electron desktop release, or when implementing a screen from a design spec — and before saying "done" on any backend change.
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
# nextcore-dev Design and code drift apart at the **data contract**, not at the pixels. A mockup shows a price, a badge, an empty list. Code has to answer three questions for each: where does the value come from, what shape does the API return, and what signal tells the UI which state to draw. When nobody writes those answers down, each side guesses. This skill is the written answer. It pairs with [nextcore-design](https://github.com/kennetvn/nextcore-skills/tree/main/plugins/nextcore-design): that skill produces `spec.md` with a **field map**; this skill turns the field map into an **API contract** and a set of backend rules that keep the contract true in production. Distilled from a production booking platform (Next.js, Prisma, MySQL, ~230 pages, ~740 API routes, a fleet of browser extensions calling the API). Every rule below cost at least one incident. The numbers are real. --- ## 1. The chain: design element → field → API → UI state ``` spec.md field map ──► API contract ──► handler + schema ──► UI states "Price / night" GET /stays Decimal(18,2) empty: "No price yet" source: stays.price data.priceFrom nullable loading / error / ok …
Read the whole file at its exact version.
How to install
mdr add kennetvn/nextcore-skills/nextcore-dev@sha256:c1075bab8f3cb5fcThe line at the top of this page pins the label git:20261031.5e13a1d, 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_hbjifvt2xkts7bj6)
1 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 3 versions of this file, between Oct 3, 2026 and Oct 31, 2026, about one every 14 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261031.5e13a1d latest | 2026-10-31 | 5e13a1d | 10,350 B | A | view · diff |
| git:20261003.2cb4307 | 2026-10-03 | 2cb4307 | 10,068 B | A | view · diff |
| git:20261003.c9cd27e | 2026-10-03 | c9cd27e | 10,034 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 (10350 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
kennetvn/nextcore-skills · 4 stars · license MIT · pushed 2026-10-31 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_hbjifvt2xkts7bj6 GET https://markdownregistry.com/api/v1/resolve?ref=kennetvn/nextcore-skills/nextcore-dev GET https://markdownregistry.com/api/v1/blob/c1075bab8f3cb5fc6d062fb5c0adce907704d21206fca88a4371324dd7ff3233
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.