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99 lines
2.9 KiB
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99 lines
2.9 KiB
Markdown
<!-- Context: openagents-repo/guides | Priority: high | Version: 1.0 | Updated: 2026-02-15 -->
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# Building CLIs in OpenAgents Control: Compact Guide
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**Category**: guide
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**Purpose**: Rapidly build, register, and deploy CLI tools for OpenAgents Control skills
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**Framework**: FAB (Features, Advantages, Benefits)
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---
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## 🚀 Quick Start
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**Don't start from scratch.** Use the standard pattern to build robust CLIs in minutes.
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1. **Create**: `mkdir -p .opencode/skills/{name}/scripts`
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2. **Implement**: Create `skill-cli.ts` (TypeScript) and `router.sh` (Bash)
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3. **Register**: Add to `registry.json`
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4. **Run**: `bash .opencode/skills/{name}/router.sh help`
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---
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## 🏗️ Core Architecture
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| Component | File | Purpose |
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|-----------|------|---------|
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| **Logic** | `scripts/skill-cli.ts` | Type-safe implementation using `ts-node`. Handles args, logic, and output. |
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| **Router** | `router.sh` | Universal entry point. Routes commands to the TS script. |
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| **Docs** | `SKILL.md` | User guide, examples, and integration details. |
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| **Config** | `registry.json` | Makes the skill discoverable and installable via `install.sh`. |
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---
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## ⚡ Implementation Patterns
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### 1. The Router (`router.sh`)
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**Why**: Provides a consistent, dependency-free entry point for all environments.
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```bash
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#!/bin/bash
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SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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case "$1" in
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help|--help|-h)
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echo "Usage: bash router.sh <command>"
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;;
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*)
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# Route to TypeScript implementation
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npx ts-node "$SCRIPT_DIR/scripts/skill-cli.ts" "$@"
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;;
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esac
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```
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### 2. The CLI Logic (`skill-cli.ts`)
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**Why**: Type safety, async/await support, and rich ecosystem access.
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```typescript
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#!/usr/bin/env ts-node
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async function main() {
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const [command, ...args] = process.argv.slice(2);
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switch (command) {
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case 'action':
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await handleAction(args);
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break;
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default:
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console.log("Unknown command");
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process.exit(1);
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}
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}
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main().catch(console.error);
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```
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---
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## ✅ Quality Checklist
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Before shipping, verify your CLI delivers value:
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- [ ] **Help Command**: Does `router.sh help` provide clear, actionable usage info?
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- [ ] **Error Handling**: Do invalid inputs return helpful error messages (not stack traces)?
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- [ ] **Performance**: Does it start in < 1s? (Avoid heavy imports at top level)
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- [ ] **Idempotency**: Can commands be run multiple times safely?
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- [ ] **Registry**: Is it added to `registry.json` with correct paths?
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---
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## 🧠 Copywriting Principles for CLI Output
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Apply `content-creation` principles to your CLI output:
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1. **Clarity**: Use **Active Voice**. "Created file" (Good) vs "File has been created" (Bad).
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2. **Specificity**: "Processed 5 files" (Good) vs "Processing complete" (Bad).
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3. **Action**: Tell the user what to do next. "Run `npm test` to verify."
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---
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**Reference**: See `/home/pnx/.config/opencode/context/openagents-repo/guides/adding-skill-basics.md` for the full, detailed walkthrough.
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