Send, receive, auto-reply, and inspect WhatsApp messages over Twilio or your personal WhatsApp Web session. Ships with a one-command webhook setup (Tailscale Funnel + Twilio callback) and a configurable auto-reply engine (plain text or command/Claude driven).

Install from npm (global): npm install -g warelay (Node 22+). Then choose one path:

A) Personal WhatsApp Web (preferred: no Twilio creds, fastest setup)

1. Link your account: warelay login (scan the QR).
2. Send a message: warelay send --to +12345550000 --message "Hi from warelay" (add --provider web if you want to force the web session).
3. Stay online & auto-reply: warelay relay --verbose (defaults to Web when logged in, falls back to Twilio otherwise).

B) Twilio WhatsApp number (for delivery status + webhooks)

1. Copy .env.example → .env; set TWILIO_ACCOUNT_SID, TWILIO_AUTH_TOKEN or TWILIO_API_KEY/TWILIO_API_SECRET, and TWILIO_WHATSAPP_FROM=whatsapp:+19995550123 (optional TWILIO_SENDER_SID).
2. Send a message: warelay send --to +12345550000 --message "Hi from warelay".
3. Receive replies:
   • Polling (no ingress): warelay relay --provider twilio --interval 5 --lookback 10
   • Webhook + public URL via Tailscale Funnel: warelay webhook --ingress tailscale --port 42873 --path /webhook/whatsapp --verbose

Already developing locally? You can still run pnpm install and pnpm warelay ... from the repo, but end users only need the npm package.

• Two providers: Twilio (default) for reliable delivery + status; Web provider for quick personal sends/receives via QR login.
• Auto-replies: Static templates or external commands (Claude-aware), with per-sender or global sessions and /new resets.
• Claude setup guide: see docs/claude-config.md for the exact Claude CLI configuration we support.
• Webhook in one go: warelay webhook --ingress tailscale enables Tailscale Funnel, runs the webhook server, and updates the Twilio sender callback URL.
• Polling fallback: relay polls Twilio when webhooks aren’t available; works headless.
• Status + delivery tracking: status shows recent inbound/outbound; send can wait for final Twilio status.

• Twilio: warelay send --to +1... --message "Hi" --media ./pic.jpg --serve-media (needs warelay webhook --ingress tailscale or --serve-media to auto-host via Funnel; max 5 MB).
• Web: warelay send --provider web --media ./pic.jpg --message "Hi" (local path or URL; no hosting needed).
• Auto-replies can attach mediaUrl in ~/.warelay/warelay.json (used alongside text when present).

• Twilio (default): needs .env creds + WhatsApp-enabled number; supports delivery tracking, polling, webhooks, and auto-reply typing indicators.
• Web (--provider web): uses your personal WhatsApp via Baileys; supports send/receive + auto-reply, but no delivery-status wait; cache lives in ~/.warelay/credentials/ (rerun login if logged out).
• Auto-select (relay only): --provider auto uses Web when logged in, otherwise Twilio polling.

Best practice: use a dedicated WhatsApp account (separate SIM/eSIM or business account) for automation instead of your primary personal account to avoid unexpected logouts or rate limits.

(*Provide either auth token OR api key/secret.)

• Controls who is allowed to trigger replies (allowFrom), reply mode (text or command), templates, and session behavior.
• Example (Claude command):

{
  inbound: {
    allowFrom: ["+12345550000"],
    reply: {
      mode: "command",
      bodyPrefix: "You are a concise WhatsApp assistant.\n\n",
      command: ["claude", "--dangerously-skip-permissions", "{{BodyStripped}}"],
      claudeOutputFormat: "text",
      session: { scope: "per-sender", resetTriggers: ["/new"], idleMinutes: 60 }
    }
  }
}

1. Install the official Claude CLI (e.g., brew install anthropic-ai/cli/claude or follow the Anthropic docs) and run claude login so it can read your API key.
2. In warelay.json, set reply.mode to "command" and point command[0] to "claude"; set claudeOutputFormat to "text" (or "json"/"stream-json" if you want warelay to parse and trim the JSON output).
3. (Optional) Add bodyPrefix to inject a system prompt and session settings to keep multi-turn context (/new resets by default).
4. Run pnpm warelay relay --provider auto (or --provider web|twilio) and send a WhatsApp message; warelay will queue the Claude call, stream typing indicators (Twilio provider), parse the result, and send back the text.

Templating tokens: {{Body}}, {{BodyStripped}}, {{From}}, {{To}}, {{MessageSid}}, plus {{SessionId}} and {{IsNewSession}} when sessions are enabled.

• warelay webhook --ingress none starts the local Express server on your chosen port/path; add --reply "Got it" for a static reply when no config file is present.
• warelay webhook --ingress tailscale enables Tailscale Funnel, prints the public URL (https://<tailnet-host><path>), starts the webhook, discovers the WhatsApp sender SID, and updates Twilio callbacks to the Funnel URL.
• If Funnel is not allowed on your tailnet, the CLI exits with guidance; you can still use relay --provider twilio to poll without webhooks.

• Send/receive issues: run pnpm warelay status --limit 20 --lookback 240 --json to inspect recent traffic.
• Auto-reply not firing: ensure sender is in allowFrom (or unset), and confirm .env + warelay.json are loaded (reload shell after edits).
• Web provider dropped: rerun pnpm warelay login; credentials live in ~/.warelay/credentials/.
• Tailscale Funnel errors: update tailscale/tailscaled; check admin console that Funnel is enabled for this device.

• Twilio errors: 63016 “permission to send an SMS has not been enabled” → ensure your number is WhatsApp-enabled; 63007 template not approved → send a free-form session message within 24h or use an approved template; 63112 policy violation → adjust content, shorten to <1600 chars, avoid links that trigger spam filters. Re-run pnpm warelay status to see the exact Twilio response body.
• Does this store my messages? warelay only writes ~/.warelay/warelay.json (config), ~/.warelay/credentials/ (WhatsApp Web auth), and ~/.warelay/sessions.json (session IDs + timestamps). It does not persist message bodies beyond the session store. Logs print to stdout/stderr; redirect or rotate if needed.
• Personal WhatsApp safety: Automation on personal accounts can be rate-limited or logged out by WhatsApp. Use --provider web sparingly, keep messages human-like, and re-run login if the session is dropped.
• Limits to remember: WhatsApp text limit ~1600 chars; avoid rapid bursts—space sends by a few seconds; keep webhook replies under a couple seconds for good UX; command auto-replies time out after 600s by default.
• Deploy / keep running: Use tmux or screen for ad-hoc (tmux new -s warelay -- pnpm warelay relay --provider twilio). For long-running hosts, wrap pnpm warelay relay ... or pnpm warelay webhook --ingress tailscale ... in a systemd service or macOS LaunchAgent; ensure environment variables are loaded in that context.
• Rotating credentials: Update .env (Twilio keys), rerun your process; for Web provider, delete ~/.warelay/credentials/ and rerun pnpm warelay login to relink.