Initial commit: positioning, license, project scaffold

Arboretum — self-hosted web dashboard for git worktrees and the Claude
Code sessions running on them. README states the positioning vs
GitKraken Agent Mode, Happy/CloudCLI and Anthropic Remote Control, the
security model (localhost-first + Tailscale), and the Claude usage note.
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node_modules/
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MIT License
Copyright (c) 2026 Johan Leroy
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.

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# Arboretum
> A self-hosted web dashboard for your git worktrees and the Claude Code sessions running on them — from any device.
**Status: early development (pre-MVP).** The design study and architecture are complete; implementation is in progress. Not usable yet.
## The problem
Working with AI coding agents changed how we use git: one feature = one worktree = one Claude Code session, several of them in parallel. But the tooling didn't follow:
- `git worktree list` across multiple repos is a chore, worktrees pile up, each needs its `node_modules` and `.env`.
- Claude Code sessions are scattered: some running in terminals, some resumable from history, with no consolidated view of *which one is waiting for your input*.
- When you step away from your desk, a session blocked on a permission prompt stays blocked.
## What Arboretum does
A single Node.js daemon you run on your dev machine (`npx git-arboretum`), serving a web UI usable from your desktop, phone or tablet:
- **Worktree-first, multi-repo dashboard** — every worktree of every registered repo, with its git state (branch, ahead/behind, dirty files) *and* the state of its Claude Code session (busy / waiting for input / idle / resumable).
- **Full worktree lifecycle** — create (with per-repo post-create hooks: `npm ci`, copy `.env`…), adopt worktrees created by hand, delete with guardrails, prune orphans.
- **Session discovery & resume** — sessions you launched in your own terminal show up automatically; resume dead ones, observe or fork live ones. Never corrupts a live session.
- **Web terminal** — full xterm.js terminal to every managed session, surviving browser disconnects.
- **Supervision from your phone** *(post-MVP)* — PWA with push notifications when a session needs you, approve/deny without opening a terminal.
## What makes it different
| | Arboretum | GitKraken Agent Mode / Conductor / Nimbalyst | Happy / CloudCLI | Anthropic Remote Control |
|---|---|---|---|---|
| Web UI, any device | ✅ | ❌ desktop apps | ✅ | ✅ |
| Visual worktree management (multi-repo) | ✅ | ✅ (single repo, desktop) | ❌ | ❌ |
| Discovers & resumes *existing* terminal sessions | ✅ | ❌ | partial | ❌ |
| 100% self-hosted — zero traffic through third-party servers | ✅ | ✅ | relay server | ❌ relayed through Anthropic |
| Linux-first | ✅ | varies | ✅ | Desktop app has no Linux build |
| Open source | MIT | ❌ / partial | MIT / AGPL | ❌ |
Anthropic's Remote Control is great at piloting *one* session from your phone. Arboretum is the layer it doesn't provide: the consolidated, self-hosted board of all your worktrees and sessions across all your repos.
## Security model
A web terminal is remote code execution *by design*. Arboretum binds to `127.0.0.1` by default, authenticates every request **and** every WebSocket upgrade with revocable tokens, and strictly checks the `Origin` header. The recommended way to reach it from other devices is [Tailscale Serve](docs/tailscale.md) (valid HTTPS, tailnet identity, no open ports). Never expose it directly to the internet.
## A note on Claude usage
Arboretum wraps the **interactive** Claude Code CLI in a PTY — the same thing you run in your terminal, displayed in your browser. It does not use the Agent SDK or headless mode. Anthropic's usage policies around programmatic use may evolve; Arboretum will track CLI releases and document any impact transparently.
## License
MIT — see [LICENSE](LICENSE).