cratis-arc-command-typescript SKILL.md skillA
cratis-arc-command-typescript from cratis/ai is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add cratis/ai/cratis-arc-command-typescript@git:20261012.8a4854aPins git:20261012.8a4854a in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- cratis/ai
- Path
.cratis/ai/skills/cratis-arc-command-typescript/SKILL.md- Versions recorded
- 5
- Latest version
- git:20261012.8a4854a, committed Oct 12, 2026
- First version recorded
- Sep 26, 2026
- Size
- 20,845 bytes
- Repository stars
- 4
- License
- MIT
Define a Cratis Arc command in a Node.js TypeScript server with Arc for TypeScript — project setup from the source preview, ArcApplication.createBuilder() and discovery, the @command() class with @field inputs, handle() and provide(), outcome helpers, service injection, authorization, returning Chronicle events through withChronicle, generated artifact metadata and proxies, hosting on the standalone host, Express, Fastify, Hono or the Fetch entry, and CommandScenario specs. Use when adding or…
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
# Define an Arc command in TypeScript (Node.js server) Arc for TypeScript (`Cratis/Arc.TypeScript`) is the Node.js server implementation of Arc. A command is a decorated class that carries the input and handles itself; Arc supplies the route, body binding, validation, authorization, and the `CommandResult` envelope. There is no controller and no route to write. ## Source preview — read this first - **None of the server packages is published to npm.** `@cratis/arc.core`, `@cratis/arc.express`, `@cratis/arc.fastify`, `@cratis/arc.hono`, `@cratis/arc.testing`, `@cratis/arc.mongodb`, `@cratis/arc.drizzle`, `@cratis/arc.chronicle`, `@cratis/cratis`, `@cratis/arc.proxygenerator` and `@cratis/eslint-plugin-arc-core` are an unpublished source preview (0.x manifests; GitHub pre-releases v0.1.0–v0.57.2). The API may still change. `npm install @cratis/arc.core` fails. - **`@cratis/arc` is a different package.** `@cratis/arc`, `@cratis/arc.react` and `@cratis/arc.react.mvvm` are the published **client** runtime, built from `Cratis/Arc`. Generated proxies import them in the frontend. The server packages …
Read the whole file at its exact version.
How to install
mdr add cratis/ai/cratis-arc-command-typescript@sha256:4a2791862eff7686The line at the top of this page pins the label git:20261012.8a4854a, 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_yqkf7v5ulflaskuc)
2 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 5 versions of this file, between Sep 26, 2026 and Oct 12, 2026, about one every 4 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20261012.8a4854a latest | 2026-10-12 | 8a4854a | 20,845 B | A | view · diff |
| git:20261008.d1db108 | 2026-10-08 | d1db108 | 19,874 B | A | view · diff |
| git:20261006.67290e5 | 2026-10-06 | 67290e5 | 23,192 B | A | view · diff |
| git:20260926.f091c73 | 2026-09-26 | f091c73 | 22,680 B | A | view · diff |
| git:20260926.ff6c0ff | 2026-09-26 | ff6c0ff | 22,648 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 (20845 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
cratis/ai · 4 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_yqkf7v5ulflaskuc GET https://markdownregistry.com/api/v1/resolve?ref=cratis/ai/cratis-arc-command-typescript GET https://markdownregistry.com/api/v1/blob/4a2791862eff7686165e75bf6571e0c7fa5356ab7b8534145c54e403caa4a5a8
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.