Add Agent Skill for aix CLI

ai.json

@@ -1,7 +1,9 @@
 {
    "$schema": "https://x.a1st.dev/schemas/v1/ai.json",
    "extends": "github:yokuze/aix-config",
-   "skills": {},
+   "skills": {
+      "aix-cli": "./skills/aix-cli"
+   },
    "mcp": {},
    "rules": {},
    "prompts": {

skills/aix-cli/SKILL.md

@@ -0,0 +1,105 @@
+---
+name: aix-cli
+description: Use the aix CLI to manage AI agent configurations, skills, MCP servers, and rules across multiple editors.
+---
+
+# aix CLI Skill
+
+The `aix` CLI is a unified tool for managing AI agent configurations. It allows you to define your skills, prompts, rules, and MCP server configurations in a single `ai.json` file and install them into various AI-powered editors like Claude Code, Cursor, Windsurf, and more.
+
+## Core Commands
+
+### Initialization
+
+Initialize a new `ai.json` configuration file in your project:
+
+```bash
+aix init
+```
+
+Options:
+
+- `--force`, `-f`: Overwrite existing `ai.json`.
+- `--from <editor>`: Import existing configuration from a specific editor (e.g., `cursor`, `windsurf`, `claude-code`).
+
+### Discovery
+
+Search for available MCP servers and skills:
+
+```bash
+aix search [query]
+```
+
+### Adding Components
+
+Add new components to your `ai.json` configuration.
+
+#### Adding Skills
+
+```bash
+aix add skill <source>
+```
+
+Source can be a local path, a GitHub/GitLab URL, or an npm package name.
+
+#### Adding MCP Servers
+
+```bash
+aix add mcp <name>
+```
+
+Adds an MCP server from the official registry. You can also specify `--command` for manual configuration.
+
+#### Adding Rules and Prompts
+
+```bash
+aix add rule <source>
+aix add prompt <source>
+```
+
+### Installation
+
+Install your configured components to one or more AI editors:
+
+```bash
+aix install
+```
+
+Options:
+
+- `--target <editor>`: Install to a specific editor (can be used multiple times).
+- `--scope <scope>`: Install only specific types of components (`mcp`, `skills`, `rules`, `prompts`).
+- `--save`: Save remote configurations locally.
+
+### Management
+
+List your configured components:
+
+```bash
+aix list skills
+aix list mcp
+aix list rules
+aix list prompts
+aix list editors
+```
+
+Remove a component:
+
+```bash
+aix remove <type> <name>
+```
+
+### Validation
+
+Validate your `ai.json` configuration or a specific skill/rule file:
+
+```bash
+aix validate [path]
+```
+
+## Best Practices
+
+1. **One Source of Truth**: Always modify your `ai.json` or use `aix add` instead of manually configuring each editor.
+2. **Version Control**: Check your `ai.json` into your project's version control (e.g., Git).
+3. **Local Overrides**: Use `ai.local.json` for machine-specific configurations (like API keys or local paths) that shouldn't be committed. Many `aix add` commands support a `--local` flag.
+4. **Regular Sync**: Run `aix install` after adding or updating configurations to ensure all editors are in sync.