app-feature-craft skillA
app-feature-craft is agent-read markdown (skill) from sidiangongyuan/codex-skills-library: Use when implementing or improving a user-facing app workflow. Guides product-grade UX, frontend, backend/API behavior, AI/provider or long-running task states, tests, and end-to-end verification from rough requirements to a shippable feature..
Indexed from public GitHub and served as immutable, content-addressed versions. Install it pinned to an exact SHA-256 with the mdr CLI, and every file is verified against the hash recorded here before it reaches your agent. The deterministic audit below grades the latest version, and the same file always earns the same grade.
What the file says
# App Feature Craft
Use this skill to turn an app request into a feature users can actually rely on.
Default to shipping the smallest complete behavior, not a technical stub.
## Workflow
1. Ground in the product before designing.
- Inspect routes, screens, state stores, API clients, backend handlers, data
models, tests, packaging scripts, and existing copy.
- Resolve discoverable facts from the repo before asking the user.
- If visual behavior matters, inspect screenshots or run the app.
2. Define the user-facing outcome.
- State what the user can do after the change.
- Identify the audience, success criteria, in/out of scope, data safety
constraints, and where the behavior must appear.
- Separate optional convenience from behavior required for a complete feature.
3. Design the whole path.
- Cover UI states: empty, loading, success, failure, stale data, first-run,
and already-configured.
- Keep controls near the user's task context. Avoid bolted-on panels,
rigid form-heavy surfaces, or result views that disappear behind an
ambiguous "back" action.
- Prefer reading-first UI with focused edit affordances for dense knowledge
…Read the whole file at its exact version.
How to install
mdr add sidiangongyuan/codex-skills-library/app-feature-craft@git:20260712.ef71354mdr add sidiangongyuan/codex-skills-library/app-feature-craft@sha256:80092939458fbf94Pin to a label to follow the author's releases, or to a sha256 to freeze the exact bytes forever. Either way the resolved hash is written to mdr.lock, and mdr install reproduces it on any machine.
[](https://markdownregistry.com/a/art_sjjksgms75usqtuc)
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Versions
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 (4272 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
sidiangongyuan/codex-skills-library · 9 stars · license MIT · pushed 2026-09-21 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_sjjksgms75usqtuc GET https://markdownregistry.com/api/v1/resolve?ref=sidiangongyuan/codex-skills-library/app-feature-craft GET https://markdownregistry.com/api/v1/blob/80092939458fbf9490d85a475e2bda9b36554a6aaabe1df58ba30e11efe19167
Your agent 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.