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backend-api SKILL.md skillA

backend-api from bekaku/java-spring-boot-starter is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add bekaku/java-spring-boot-starter/backend-api@git:20260924.15dc64a

Pins git:20260924.15dc64a in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: bekaku/java-spring-boot-starter
Path: .agents/skills/backend-api/SKILL.md
Versions recorded: 3
Latest version: git:20260924.15dc64a, committed Sep 24, 2026
First version recorded: Sep 21, 2026
Size: 5,023 bytes
Repository stars: 31
License: none declared

Use when adding or changing a REST controller, route, request/response DTO, bean validation, domain validator, list/search/paging behavior, or error response in this Spring Boot backend. Pair with backend-data for query changes and backend-security for route access or owner-scoped data.

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

# Backend API — Playbook

> **Role:** HOW to build or change an endpoint. Binding facts + evidence: `skills/backend/API.md` (read it too).
> **Requires:** `backend-core`. **Often paired with:** `backend-data`, `backend-security`, `backend-testing`.

## Use when / skip when

- Use: new or changed endpoint, DTO field, validation rule, list filter/sort/paging, status code, error body.
- Skip: pure persistence change with no contract change (`backend-data` only).

## Recipe A — add an endpoint to an existing controller

1. Open the controller in `controller/api/` and one sibling endpoint that does something similar. Copy its shape.
2. Decide the contract first: method, path, request DTO, response DTO, status (table in `API.md`), permission code, owner scoping.
3. Write the handler:

   ```java
   @PreAuthorize("@permissionChecker.hasPermission('{table}_{action}')")
   @PostMapping("/{id}/archive")
   public ResponseEntity<{Model}Dto> archive(@AuthenticationPrincipal AppUserDto auth,
                                             @PathVariable Long id,
                                             @Valid @RequestBody {Model}ArchiveRequest request) {
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add bekaku/java-spring-boot-starter/backend-api@sha256:7e96b6461f638f10

The line at the top of this page pins the label git:20260924.15dc64a, 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.

Badge

[![mdr](https://markdownregistry.com/badge/art_c6p4vbrkas74gwjl.svg)](https://markdownregistry.com/a/art_c6p4vbrkas74gwjl)

4 badge image fetches in 30 days. What the badge shows.

Versions

The registry has recorded 3 versions of this file, between Sep 21, 2026 and Sep 24, 2026, about one every 2 days.

version	committed	commit	size	audit
git:20260924.15dc64a latest	2026-09-24	15dc64a	5,023 B	A	view · diff
git:20260923.b5acb6d	2026-09-23	b5acb6d	2,171 B	A	view · diff
git:20260921.de5eb9f	2026-09-21	de5eb9f	1,290 B	A	view

Audit of the latest version

A 17 of 17 checks passed. Fixed automatic checks with no AI involved, so the same checks give the same answer every run.

pass: Frontmatter block present
pass: Frontmatter declares a name
pass: Frontmatter declares a description
pass: Size between 200 bytes and 200 KB (5023 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

GitHub

bekaku/java-spring-boot-starter · 31 stars · license none declared · pushed 2026-11-03 · branch master

API

GET https://markdownregistry.com/api/v1/artifacts/art_c6p4vbrkas74gwjl
GET https://markdownregistry.com/api/v1/resolve?ref=bekaku/java-spring-boot-starter/backend-api
GET https://markdownregistry.com/api/v1/blob/7e96b6461f638f109cf52b29dd6e306429dbd7ec3ac61a03dae3cb014cc74386

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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