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docs/installation.md

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+# Installation
+
+This page covers installing the `ai-cli-dispatch` tool, its prerequisites, and post-install verification.
+
+## Prerequisites
+
+- **Node.js** ≥ 20 (required for `tsx`, `import` attributes, and modern `node:child_process` APIs)
+- **npm** (bundled with Node.js)
+- **Homebrew** (macOS/Linux) — recommended for installing the underlying AI CLI clients (`codex`, `claude`, `opencode`)
+- One or more supported AI CLI clients:
+  - [Codex CLI](https://github.com/openai/codex)
+  - [Claude Code](https://docs.anthropic.com/en/docs/agents-and-tools/claude-code/overview)
+  - [OpenCode](https://github.com/opencode-ai/opencode)
+
+## Install the tool
+
+### 1. Clone the repository
+
+```bash
+git clone <repository-url> ~/.openclaw/workspace/skills/ai-cli-dispatch
+cd ~/.openclaw/workspace/skills/ai-cli-dispatch
+```
+
+If you already have the full `stef-openclaw-skills` repo checked out, use the path inside it instead:
+
+```bash
+cd ~/.openclaw/workspace/skills/stef-openclaw-skills/tools/ai-cli-dispatch
+```
+
+### 2. Install Node dependencies
+
+```bash
+npm install
+```
+
+This installs:
+- `tsx` — TypeScript execution runtime
+- `minimist` — argument parsing
+- `typescript` — type checking
+
+## PATH configuration
+
+The helper script lives at `scripts/ai-cli-dispatch`. Add it to your shell PATH so OpenClaw (or your terminal) can invoke it without a full path:
+
+```bash
+# ~/.zshrc or ~/.bashrc
+export PATH="$HOME/.openclaw/workspace/skills/ai-cli-dispatch/scripts:$PATH"
+```
+
+Reload your shell:
+
+```bash
+source ~/.zshrc   # or ~/.bashrc
+```
+
+Verify the script is reachable:
+
+```bash
+which ai-cli-dispatch
+ai-cli-dispatch --help
+```
+
+## Optional configuration file
+
+Create `~/.openclaw/ai-cli-dispatch.json` to customize client paths and set a default client:
+
+```bash
+mkdir -p ~/.openclaw
+$EDITOR ~/.openclaw/ai-cli-dispatch.json
+```
+
+Example configuration:
+
+```json
+{
+  "paths": {
+    "codex": "/opt/homebrew/bin/codex",
+    "claude": "/opt/homebrew/bin/claude",
+    "opencode": "/opt/homebrew/bin/opencode"
+  },
+  "defaultClient": "claude"
+}
+```
+
+### Configuration precedence
+
+When resolving a client binary, the tool checks sources in this order (first match wins):
+
+1. CLI flag: `--codex-path`, `--claude-path`, `--opencode-path`
+2. Environment variable: `AI_CLI_CODEX_PATH`, `AI_CLI_CLAUDE_PATH`, `AI_CLI_OPENCODE_PATH`
+3. File config: `paths.<client>` in `~/.openclaw/ai-cli-dispatch.json`
+4. System `PATH` lookup via `which` / `where`
+
+The `defaultClient` follows the same precedence:
+
+1. CLI flag: `--default-client`
+2. Environment variable: `AI_CLI_DEFAULT_CLIENT`
+3. File config: `defaultClient` in `~/.openclaw/ai-cli-dispatch.json`
+
+## Install AI CLI clients
+
+### Codex
+
+```bash
+npm install -g @openai/codex
+```
+
+### Claude Code
+
+```bash
+npm install -g @anthropic-ai/claude-code
+```
+
+### OpenCode
+
+```bash
+npm install -g @opencode-ai/opencode
+```
+
+Or via Homebrew where formulas are available:
+
+```bash
+brew install codex        # if available in your tap
+brew install claude-code  # if available in your tap
+```
+
+## Verification
+
+### 1. Check local tool health
+
+```bash
+ai-cli-dispatch --help
+```
+
+Expected output:
+
+```text
+AI CLI Dispatch
+
+Usage:
+  ai-cli-dispatch list [--json|--text]
+  ai-cli-dispatch run --client <client> --prompt <prompt> [--json|--text]
+  ai-cli-dispatch dispatch <prompt> [--client <client>] [--json|--text]
+  ai-cli-dispatch --help
+
+Clients: codex, claude, opencode
+```
+
+### 2. List discovered clients
+
+```bash
+ai-cli-dispatch list --json
+```
+
+Example output when two clients are installed:
+
+```json
+[
+  {
+    "name": "codex",
+    "path": "/opt/homebrew/bin/codex",
+    "version": "1.2.3",
+    "found": true
+  },
+  {
+    "name": "claude",
+    "path": "/opt/homebrew/bin/claude",
+    "version": "0.7.8",
+    "found": true
+  },
+  {
+    "name": "opencode",
+    "found": false
+  }
+]
+```
+
+### 3. Run a quick dispatch
+
+```bash
+ai-cli-dispatch run --client codex --prompt "hello" --json
+```
+
+This should return a JSON result with `stdout`, `stderr`, and `exitCode`.
+
+### 4. Test keyword dispatch
+
+```bash
+ai-cli-dispatch dispatch "refactor this using claude"
+```
+
+The tool inspects the prompt for client keywords (`claude`, `codex`, `opencode`, `open code`) and routes to the matching client.
+
+## Troubleshooting
+
+### `Missing local Node dependencies for ai-cli-dispatch`
+
+Run `npm install` from the skill directory:
+
+```bash
+cd ~/.openclaw/workspace/skills/ai-cli-dispatch
+npm install
+```
+
+### `Client "codex" not found or not installed`
+
+- Ensure the client is installed globally or via Homebrew
+- Verify it is on your PATH: `which codex`
+- Or override the path in `~/.openclaw/ai-cli-dispatch.json` or with an environment variable
+
+### `Prompt cannot be empty`
+
+The `run` and `dispatch` commands require a non-empty `--prompt` or trailing prompt text.
+
+### Config file is not being read
+
+- Verify the file is at exactly `~/.openclaw/ai-cli-dispatch.json`
+- Check for JSON syntax errors (trailing commas are not allowed)
+- Use `--debug` for deeper troubleshooting if supported by the calling context