[FEAT] WorkPro: External group messaging for private business groups — is this supported?

Hi team,

We're evaluating WorkPro for a WeCom integration at our company. Before purchasing tokens (if possible), we need to confirm whether our specific use case is supported.

What we need:

We have ~40 private WeCom external groups (客户群) with our own staff and business partners. We want to add a dedicated WeCom member to these groups that is backed by our own server. Specifically:

1. Receive — When someone @mentions the bot member in a group, we receive that message (or detect it via polling)
2. Process — We send the message to our backend server for processing
3. Reply — The bot member sends a response back into the same group These are private company groups — not spam, not marketing. Just an internal AI assistant for our supply chain teams.

Questions:

• Does room.say() work in WeCom external groups (groups containing personal WeChat users)?
• Can we receive inbound group messages via Wechaty's on('message') event in external groups?
• What is the current process to purchase a WorkPro token? The documentation points to a QR code but we haven't been able to reach anyone.
• Is there a trial available so we can validate the above before committing?

Any guidance appreciated. Happy to discuss further.