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@mulmobridge/line

v0.1.1

Published

LINE bridge for MulmoBridge — connect a LINE bot to MulmoClaude

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Readme

@mulmobridge/line

Experimental — please test and report issues.

LINE bridge for MulmoClaude. Uses webhook events — requires a public URL (ngrok for development).

Setup

1. Create a LINE Messaging API Channel

  1. Go to LINE Developers Console → create a Provider → create a Messaging API channel
  2. Note the Channel secret (Basic settings tab)
  3. Issue a Channel access token (Messaging API tab → long-lived)

2. Set up ngrok (for development)

ngrok is a tunneling tool that exposes a local port to the internet so LINE's webhooks can reach your machine.

brew install ngrok
ngrok config add-authtoken <your-token>  # from ngrok dashboard
ngrok http 3002
# Copy the https://xxxx.ngrok-free.app URL

3. Configure the webhook

In the LINE Developers Console → Messaging API tab:

  • Webhook URL: https://xxxx.ngrok-free.app/webhook — the trailing /webhook is required (without it you get 404)
  • Use webhook: enabled
  • Auto-reply messages: disabled (LINE Official Account settings → Auto-reply messages → OFF, otherwise you get double replies)

4. Run the bridge

# With mock server (testing)
npx @mulmobridge/mock-server &
LINE_CHANNEL_SECRET=... \
LINE_CHANNEL_ACCESS_TOKEN=... \
MULMOCLAUDE_AUTH_TOKEN=mock-test-token \
npx @mulmobridge/line

# With real MulmoClaude
LINE_CHANNEL_SECRET=... \
LINE_CHANNEL_ACCESS_TOKEN=... \
npx @mulmobridge/line

5. Add the bot as a friend

Scan the QR code in the LINE Developers Console → Messaging API tab. Send a message — MulmoClaude replies.

Environment Variables

| Variable | Required | Description | |---|---|---| | LINE_CHANNEL_SECRET | Yes | Channel secret for signature verification | | LINE_CHANNEL_ACCESS_TOKEN | Yes | Long-lived channel access token | | LINE_BRIDGE_PORT | No | Webhook port (default: 3002) | | MULMOCLAUDE_API_URL | No | Default http://localhost:3001 | | MULMOCLAUDE_AUTH_TOKEN | No | Bearer token | | LINE_BRIDGE_DEFAULT_ROLE | No | Role id to seed new bridge sessions with (e.g. coder, general). Applied ONLY when a line session first appears — once the user switches role via /role <id> the session's own role wins. Unknown role ids silently fall back to the server's default with a warn log. | | BRIDGE_DEFAULT_ROLE | No | Same as above but shared across every bridge. Transport-specific LINE_BRIDGE_DEFAULT_ROLE wins when both are set. |

Notes

  • LINE reply tokens expire in 1 minute. Since Claude responses can take longer, the bridge uses push messages instead of reply messages. This requires your bot to be a verified/certified account for push to work with all users, OR the user must have added the bot as a friend first.
  • LINE limits messages to 5 per push call and ~5000 chars per message. Long replies are automatically chunked.

Detailed Setup Guide

For step-by-step instructions with troubleshooting:

Ecosystem

Part of the @mulmobridge/* package family.

Shared libraries:

Bridges (one npm package per platform):

License

MIT