harmonyos-app SKILL.md skillA
harmonyos-app from majiayu000/spellbook is an agent skill: a SKILL.md folder an AI agent loads when a task calls for it.
mdr add majiayu000/spellbook/harmonyos-app@git:20260523.d39dd11Pins git:20260523.d39dd11 in mdr.lock. Pin the fingerprint instead.
- Audit grade
- A, 17 of 17 checks passed
- Kind
- SKILL.md skill
- Repository
- majiayu000/spellbook
- Path
skills/harmonyos-app/SKILL.md- Versions recorded
- 2
- Latest version
- git:20260523.d39dd11, committed May 23, 2026
- First version recorded
- Dec 19, 2025
- Size
- 11,316 bytes
- Repository stars
- 290
- License
- MIT
HarmonyOS application development expert. Use when building HarmonyOS apps with ArkTS, ArkUI, Stage model, and distributed capabilities. Covers HarmonyOS NEXT (API 12+) best practices.
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
# HarmonyOS Application Development
## Core Principles
- **ArkTS First** — Use ArkTS with strict type safety, no `any` or dynamic types
- **Declarative UI** — Build UI with ArkUI's declarative components and state management
- **Stage Model** — Use modern Stage model (UIAbility), not legacy FA model
- **Distributed by Design** — Leverage cross-device capabilities from the start
- **Atomic Services** — Consider atomic services and cards for lightweight experiences
- **One-time Development** — Design for multi-device adaptation (phone, tablet, watch, TV)
---
## Hard Rules (Must Follow)
> These rules are mandatory. Violating them means the skill is not working correctly.
### No Dynamic Types
**ArkTS prohibits dynamic typing. Never use `any`, type assertions, or dynamic property access.**
```typescript
// ❌ FORBIDDEN: Dynamic types
let data: any = fetchData();
let obj: object = {};
obj['dynamicKey'] = value; // Dynamic property access
(someVar as SomeType).method(); // Type assertion
// ✅ REQUIRED: Strict typing
interface UserData {
id: string;
name: string;
}
let data: UserData = fetchData();
// Use Record for dynamic keys
let obj: Record<string, string> = {};
…Read the whole file at its exact version.
How to install
mdr add majiayu000/spellbook/harmonyos-app@sha256:58bbe64b3071b88fThe line at the top of this page pins the label git:20260523.d39dd11, 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_fg5xfel4udg5g7ck)
4 badge image fetches in 30 days. What the badge shows.
Versions
The registry has recorded 2 versions of this file, between Dec 19, 2025 and May 23, 2026, about one every 156 days.
| version | committed | commit | size | audit | |
|---|---|---|---|---|---|
| git:20260523.d39dd11 latest | 2026-05-23 | d39dd11 | 11,316 B | A | view · diff |
| git:20251219.9fec601 | 2025-12-19 | 9fec601 | 25,574 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 (11316 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
majiayu000/spellbook · 290 stars · license MIT · pushed 2026-11-04 · branch main
API
GET https://markdownregistry.com/api/v1/artifacts/art_fg5xfel4udg5g7ck GET https://markdownregistry.com/api/v1/resolve?ref=majiayu000/spellbook/harmonyos-app GET https://markdownregistry.com/api/v1/blob/58bbe64b3071b88ffa43a78c16da5839622dbf01e515fae19bfc2999203c2b00
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.