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api-designer SKILL.md skillA

api-designer from sandbaseai/sandbase-skills is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.

Install it, pinned

mdr add sandbaseai/sandbase-skills/api-designer@git:20260908.a887321

Pins git:20260908.a887321 in mdr.lock. Pin the fingerprint instead.

Audit grade: A, 17 of 17 checks passed
Kind: SKILL.md skill
Repository: sandbaseai/sandbase-skills
Path: marketing/api-designer/SKILL.md
Versions recorded: 1
Latest version: git:20260908.a887321, committed Sep 8, 2026
Size: 3,123 bytes
Repository stars: 202
License: Apache-2.0

Plan, implement, or review api designer work in an existing codebase with compatibility, security, and verification controls. Use when the user explicitly requests api designer work.

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

# API Designer

Use this Skill to produce a bounded, verifiable API Designer outcome. Preserve the user's chosen stack, source material, and authorization boundaries.

Read [the SandBase API map](references/sandbase-api-map.md) only when the task genuinely needs an external data source or generative model.

## Workflow

1. Inspect the available files, runtime, versions, inputs, and existing conventions before deciding what to change.
2. Restate the requested outcome, constraints, acceptance checks, and any assumption that could change the result.
3. Produce the smallest complete implementation, analysis, or artifact that satisfies those checks.
4. Verify the real output with appropriate tests, previews, calculations, or source comparison; do not infer success from file creation alone.
5. Return the deliverable, evidence of validation, material assumptions, and unresolved limitations.

## Quality gates

- Inspect repository instructions, current versions, tests, and user changes before proposing an implementation.
- Make the smallest compatible change, preserve public contracts unless change is requested, and avoid new dependencies without a concrete benefit.
…

Read the whole file at its exact version.

How to install

The exact contents, by fingerprint

mdr add sandbaseai/sandbase-skills/api-designer@sha256:a363ab869cb012f2

The line at the top of this page pins the label git:20260908.a887321, 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_qceahxwj3ctjrkxb.svg)](https://markdownregistry.com/a/art_qceahxwj3ctjrkxb)

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

Versions

The registry has recorded 1 version of this file, committed on Sep 8, 2026.

version	committed	commit	size	audit
git:20260908.a887321 latest	2026-09-08	a887321	3,123 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 (3123 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

sandbaseai/sandbase-skills · 202 stars · license Apache-2.0 · pushed 2026-09-26 · branch main

API

GET https://markdownregistry.com/api/v1/artifacts/art_qceahxwj3ctjrkxb
GET https://markdownregistry.com/api/v1/resolve?ref=sandbaseai/sandbase-skills/api-designer
GET https://markdownregistry.com/api/v1/blob/a363ab869cb012f2dbf2f3f7db28e109e22272d8befa25d4e0e79ffa7104b409

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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