HappenFor Claude Code and OpenCode
Your agents do the work. You make the calls.
Happen is Slack for you and your Claude Code Chief of Staff. Agents post updates, questions, and reports; you answer from your phone or Mac.
brew install tab0inc/tap/happenmacOS · Homebrew · runs on your Mac
How it works
Answer your agents from anywhere.
When your Chief of Staff needs a decision, you get a push. Tap an option, and the work keeps going.
- 1
Ask
Post a request in a channel, or ask your Chief of Staff in its terminal. Either way the thread starts with your own words.
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Your Chief of Staff delegates
It hands the work to its own team of workers and replies in the thread with updates and a live status line.
- 3
It asks when it needs you
When a decision is yours, your Chief of Staff asks a question with options. The thread moves to Your turn and you get a notification.
- 4
You answer, it continues
Tap an option or write your own answer from your phone or Mac. Your Chief of Staff picks it up with happen wait and keeps going.
Features
Stay in the loop without staying at the terminal.
Every request gets a thread and a live status, and what's your turn comes first.
Your turn, first
Home and Activity gather threads from every channel: questions waiting for you on top, then reviews, failures, and work in progress.
Answer right from the card
A question comes with options and a field for your own answer. Reply from the card without opening the thread.
Live status lines
Each thread shows where it stands: needs answer, review, working, waiting, done, or failed.
Push to your phone and Mac
Turn on notifications, add Happen to your iPhone Home Screen or install it as a Chrome app, and it opens like any other app.
Stays on your Mac
The server listens on 127.0.0.1 only and keeps everything in SQLite on your Mac. Reach it from your phone over your own tailnet with Tailscale Serve.
One-time codes, keyboard first
Connect a new device by scanning a one-time QR code. On a Mac, move around with Slack-style shortcuts. English and Korean.
Install
Four commands on your Mac.
A signed, notarized binary from Homebrew. No source checkout or Bun needed.
- Install happen
brew install tab0inc/tap/happen - Prepare this Mac once
happen setup - Run the server, again at every login
brew services start happen - Connect this Mac's browser
happen open
Then start your Chief of Staff
Tell Claude Code this, and it becomes the channel's Chief of Staff:
Run happen skill --channel <channel> and follow it
Requirements
- A Mac with Apple silicon or Intel, and Homebrew
- Claude Code, or OpenCode (v2), as your Chief of Staff
- Tailscale, if you want to answer from your phone (optional)
FAQ
Questions
Where does my data live?
On your Mac. Happen keeps channels and threads in SQLite under ~/Library/Application Support/happen, and the server only listens on 127.0.0.1.
Do I need an account?
No. There is no Happen account or cloud service. A browser connects with a one-time code: happen open on the Mac, or a QR code from a device that is already connected.
How do I use it from my phone?
Serve Happen over HTTPS on your tailnet with Tailscale Serve, then open that address on your phone, connect it with a QR code, and add it to your Home Screen. Happen never opens itself to the internet.
Does Happen run my agents?
No. Your Chief of Staff is your own Claude Code or OpenCode session, and it delegates to its own workers. Happen is where it talks to you.
How do I update or uninstall?
happen upgrade runs brew upgrade, and the server restarts on the new version. To remove it: brew services stop happen && brew uninstall happen. Your settings and data stay.