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cli-extension-building

Build standalone CLI extensions for systemprompt.io with Clap and manifest.yaml.

2|Updated Feb 24, 2026
Search Tags:#cli#build#extension#manifest#clap#systemprompt
One-click install
npx skills add https://github.com/systempromptio/systemprompt-marketplace --skill cli-extension-building
Or copy as Structured Prompt for Agent▼
Please help me install this Agent Skill.
Skill: cli-extension-building
Source: https://github.com/systempromptio/systemprompt-marketplace/tree/main/plugins/development/skills/cli-extension-building
Command: npx skills add https://github.com/systempromptio/systemprompt-marketplace --skill cli-extension-building

SYSTEM DOCUMENTATION & REQUIREMENTS

What problem does it solve?

CLI extensions enable developers to create standalone binaries that integrate with systemprompt.io, allowing custom commands and modular functionality without embedding into the core system.

Core Features & Use Cases

  • Clap-based parsing for rich command-line interfaces with subcommands.
  • Manifest-driven discovery enabling automatic loading via manifest.yaml.
  • Subprocess integration to host and manage external tools from a single extension.
  • Use Case: Build a custom CLI that exposes domain-specific workflows, then deploy as a plug-in extension.

Quick Start

Create a new extension under extensions/cli/{name}, wire up manifest.yaml, and implement your CLI in src/main.rs.

Frequently Asked Questions about cli-extension-building

High-intent search queries and answers about installing and using this skill.

FAQPage Schema
How do I build a CLI extension that integrates with systemprompt.io?▼

Build a CLI extension by creating a Rust workspace under extensions/cli/{name} containing Cargo.toml, manifest.yaml, and src/main.rs. Implement argument parsing with Clap to enable manifest-driven discovery and systemprompt.io integration.

What is manifest-driven discovery for command-line tools?▼

Manifest-driven discovery automatically loads standalone CLI binaries via manifest.yaml. This mechanism integrates modular command-line tools into systemprompt.io plugins without embedding custom commands directly into the core system.

Do I need Rust and Clap to create standalone CLI extensions?▼

Yes, building standalone CLI extensions requires Rust tooling and Clap for argument parsing. The workspace layout mandates Cargo.toml and src/main.rs to structure the binary and define subcommands using Clap-based interfaces.

Can I manage external tools and subprocesses from a single command-line extension?▼

Yes, CLI extensions support subprocess integration to host and manage external tools from a single binary. Engineers can expose domain-specific workflows and deploy them as plug-in extensions via manifest.yaml.

When should I use a standalone CLI extension instead of embedding functionality into the core system?▼

Use standalone CLI extensions when creating modular command-line tools that require custom commands without embedding into the core system. This approach isolates domain-specific workflows and deploys them as plug-in extensions.

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