feat: add regolith onboard CLI wizard with daemon installation

- Interactive setup wizard: deps check, env config, WhatsApp auth, daemon install, health check
- CLI entry point via yargs with bin registration (regolith onboard)
- Flags: --install-daemon, --non-interactive, --pairing-code, --json, --skip-*
- launchd (macOS) and systemd (Linux) service installation
- Refactored whatsapp-auth.ts to export authenticate() for programmatic use
- 72 tests across 6 test files
- Updated README.md and CLAUDE.md with onboard CLI docs

README.md

@@ -27,8 +27,39 @@ The core philosophy remains the same: small enough to understand, secure by cont
 git clone http://10.0.0.59:3051/tanmay/Regolith.git
 cd Regolith/nanoclaw
 npm install
+npm run build
+regolith onboard
 ```
 
+The onboard wizard walks you through everything: dependency checks, `.env` configuration, WhatsApp authentication, and optional daemon installation.
+
+To install as a background service in one shot:
+```bash
+regolith onboard --install-daemon
+```
+
+For non-interactive setup (CI/scripting):
+```bash
+regolith onboard --non-interactive --install-daemon
+```
+
+### Onboard CLI Flags
+
+| Flag | Description |
+|------|-------------|
+| `--install-daemon` | Install as launchd (macOS) or systemd (Linux) service |
+| `--non-interactive` | Run without prompts, use defaults |
+| `--pairing-code` | Use pairing code instead of QR for WhatsApp |
+| `--json` | Output JSON summary instead of text |
+| `--skip-deps` | Skip dependency checks |
+| `--skip-env` | Skip .env configuration |
+| `--skip-whatsapp` | Skip WhatsApp authentication |
+| `--skip-health` | Skip health check |
+
+### Manual Setup
+
+If you prefer to configure manually instead of using the wizard:
+
 Configure your `.env`:
 ```bash
 # WhatsApp (enabled by default)
@@ -38,7 +69,10 @@ ASSISTANT_NAME=Andy
 DISCORD_BOT_TOKEN=your-discord-bot-token
 DISCORD_ONLY=false  # set to true to disable WhatsApp
 
-# OpenCode runtime (optional)
+# Agent backend: "container" (Claude Agent SDK) or "opencode"
+AGENT_BACKEND=container
+
+# OpenCode runtime (optional, used when AGENT_BACKEND=opencode)
 OPENCODE_MODE=cli        # or "sdk"
 OPENCODE_MODEL=claude    # model name
 OPENCODE_TIMEOUT=120     # seconds
@@ -72,6 +106,9 @@ The `findChannel(channels, jid)` function resolves which channel owns a given JI
 
 | File | Purpose |
 |------|---------|
+| `src/cli/index.ts` | CLI entry point (`regolith onboard`) |
+| `src/cli/wizard-runner.ts` | Onboard wizard step orchestrator |
+| `src/cli/steps/*.ts` | Individual wizard steps (deps, env, whatsapp, daemon, health) |
 | `src/index.ts` | Orchestrator: multi-channel setup, state, message loop, agent invocation |
 | `src/channels/whatsapp.ts` | WhatsApp connection, auth, send/receive |
 | `src/channels/discord.ts` | Discord bot connection, mention handling, attachment tagging |