arkts-skills/AGENTS.md

AGENTS.md - OpenCode Skills Repository

AI coding agent skills for HarmonyOS/ArkTS development. This is a documentation-only repo -- no build system for the repo itself. The skills teach agents how to build, deploy, and develop HarmonyOS apps.

Repository Structure

arkts-development/              # ArkTS/ArkUI development skill
├── SKILL.md                   # Main skill definition (loaded by agent)
├── assets/*.ets               # Code templates
└── references/*.md            # API docs, migration guide, patterns
harmonyos-build-deploy/         # Build & deploy skill
├── SKILL.md                   # Main skill definition (loaded by agent)
└── references/*.md            # Device installation guide

Build / Lint / Test Commands

These commands apply to HarmonyOS projects that the skills describe, not this repo.

Build (hvigorw)

hvigorw assembleApp --mode project -p product=default -p buildMode=release --no-daemon  # Full app
hvigorw assembleHap -p module=entry@default --mode module -p buildMode=release --no-daemon  # Single module (faster)
hvigorw clean --no-daemon                                                                # Clean artifacts
hvigorw --sync -p product=default -p buildMode=release --no-daemon                       # Sync after config change

Test

# Run all tests for a module (on-device)
hvigorw onDeviceTest -p module=entry -p coverage=true --no-daemon

# Run all tests for a module (local / host-side)
hvigorw test -p module=entry --no-daemon

# Run a single test suite or single test (on-device) -- use -p testParam
hvigorw onDeviceTest -p module=entry -p testParam="{\"unittest\":\"TestClassName\"}" --no-daemon
hvigorw onDeviceTest -p module=entry -p testParam="{\"unittest\":\"TestClassName#testMethodName\"}" --no-daemon

Dependencies (ohpm)

ohpm install --all                           # Install all deps
ohpm clean && ohpm cache clean               # Deep clean

Lint (codelinter)

codelinter                                   # Check project
codelinter --fix                             # Auto-fix
codelinter -i                                # Incremental (git changes only)
codelinter --exit-on error,warn              # CI mode (non-zero exit on issues)
codelinter -f json -o report.json            # JSON report

Device (hdc)

hdc list targets                                        # List devices (returns UDID)
hdc -t <UDID> file send <local_path> <device_path>     # Push files
hdc -t <UDID> shell "bm install -p <dir>"              # Install app
hdc -t <UDID> shell "aa start -a EntryAbility -b <bundleName>"  # Launch app

Code Style Guidelines

ArkTS Language Constraints

ArkTS is stricter than TypeScript. These features are prohibited:

Prohibited	Use Instead
any, unknown	Explicit types, interfaces
var	let, const
obj['key'] (dynamic)	Fixed object structure
for...in	for...of, array methods
delete, with	Optional properties, explicit refs
#privateField	private keyword
Structural typing	Explicit implements / extends
eval(), Function()	Arrow functions, static code

Naming Conventions

Element	Convention	Example
Components (struct)	PascalCase	HomePage, UserCard
Interfaces	PascalCase	UserInfo, ApiResponse
Methods / Functions	camelCase	loadData(), handleClick
Properties / Variables	camelCase	isLoading, userName
Constants	camelCase or UPPER_SNAKE	maxRetries, API_URL
Skill directories	kebab-case	arkts-development
Filenames (docs)	kebab-case	api-reference.md

Type Annotations

Always use explicit type annotations on declarations, parameters, and return types:

@State isLoading: boolean = false;
@State items: ItemType[] = [];
async loadData(): Promise<void> { }
navigateToDetail(item: ItemType): void { }
ForEach(this.items, (item: ItemType) => { ... }, (item: ItemType) => item.id)

Imports

Use HarmonyOS Kit-style imports:

import { router } from '@kit.ArkUI';
import { http } from '@kit.NetworkKit';
import { preferences } from '@kit.ArkData';

Component Structure

Follow this ordering inside every @Component struct:

@Entry
@Component
struct ComponentName {
  // 1. State decorators
  @State isLoading: boolean = false;
  @State errorMessage: string = '';
  // 2. Lifecycle
  aboutToAppear(): void { this.loadData(); }
  aboutToDisappear(): void { /* cleanup */ }
  // 3. Business methods
  async loadData(): Promise<void> { }
  // 4. @Builder methods (reusable UI blocks)
  @Builder ItemCard(item: ItemType) { }
  // 5. build() -- always last
  build() { }
}

Error Handling

Wrap async work in try/catch/finally with loading state:

async loadData(): Promise<void> {
  this.isLoading = true;
  try {
    // async operation
  } catch (error) {
    this.errorMessage = 'Failed to load data';
  } finally {
    this.isLoading = false;
  }
}

ForEach -- always provide types and a key generator

ForEach(this.items, (item: ItemType) => {
  ListItem() { Text(item.title) }
}, (item: ItemType) => item.id)

Skill File Format

Every skill directory contains a SKILL.md with YAML frontmatter:

---
name: skill-name          # kebab-case, matches directory name
description: ...          # Detailed description for agent matching
---
# Skill Title
## Quick Start / Quick Reference
## Detailed Sections
## Troubleshooting
## Reference Files

File Organization Rules

• Main definition: SKILL.md (uppercase)
• Code templates: assets/*.ets
• Reference docs: references/*.md
• All filenames: kebab-case

Documentation Conventions

• Use tables for command references and parameter lists.
• Use fenced code blocks with language specifiers (typescript, bash).
• Structure content as: Quick Reference first, then detailed sections.
• Cross-reference related skills and reference files by relative path.