a2ui-catalog SKILL.md skillA
a2ui-catalog from a2uicatalog/a2ui is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add a2uicatalog/a2ui/a2ui-catalog@v1.0.0Pins v1.0.0 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- a2uicatalog/a2ui
- Path
skills/a2ui-catalog/SKILL.md- Versions recorded
- 1
- Latest version
- v1.0.0, committed Aug 22, 2026
- Size
- 3,858 bytes
- Repository stars
- 6
- License
- MIT
Pick the right A2UI atoms and read their real field contracts before composing a UI payload. Use when deciding WHAT to render — searching the A2UI Atomic Catalog's 480 typed UI atoms (charts, gauges, steppers, dashboards, decision trees) for a task, or when a previous attempt to render a payload failed because a field name or atom type was guessed wrong. Not for the render step itself (see the a2ui-compose skill) or for MCP connection setup (see a2ui-mcp).
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
# Picking A2UI atoms The catalog is deliberately not loaded all at once: 480 atoms is too much context for most tasks, and the wrong field name is a validation error, not a broken render — so this skill is about narrowing down to the right slice and reading its real contract, not guessing. ## 1. Narrow to a catalog slice `list_catalogs` (MCP tool) or `GET /catalogue/index.json` (REST) returns every catalog with a one-line when-to-use, e.g. `a2ui-atoms-v1` (the base vocabulary, always resolved), `a2ui-learning-v1` (quizzes, flashcards, course UI), state/data-source extension catalogs. Pick the slice the task actually needs — do not pull the whole vocabulary into context for a one-chart request. ## 2. Read the real field contract `get_catalog(catalog)` returns that slice's atoms with type + a one-line description — enough to confirm an atom EXISTS and roughly what it does, not enough to fill it in. Before authoring any atom you haven't used before, call `get_atom_schema(types)` (MCP) or fetch `/catalogue/atoms-json-schema.json` (REST, strict per-atom JSON Schema — also useful as a `response_format`/grammar constraint so a model literally cannot emit an …
Read the whole file at its exact version.
How to install
mdr add a2uicatalog/a2ui/a2ui-catalog@sha256:25ee2214a6286723The line at the top of this page pins the label v1.0.0, 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_rymsadobocnfpzhm)
3 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 1 version of this file, committed on Aug 22, 2026.
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 (3858 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
a2uicatalog/a2ui · 6 stars · license MIT · pushed 2026-10-30 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_rymsadobocnfpzhm GET https://markdownregistry.com/api/v1/resolve?ref=a2uicatalog/a2ui/a2ui-catalog GET https://markdownregistry.com/api/v1/blob/25ee2214a628672392e451b8626708577fed478f52ab53c2d1d30d2c125a5132
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.