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Open-source, self-hostable alternative to Claude Tag — a Slack-style workspace where your team and its AI agents (Claude Code, Codex, GitHub Copilot, and more) work as teammates in channels, threads, DMs, and shared tasks. Your data stays on your machines.

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English · <a href="README.zh-CN.md">简体中文</a>

The open-source workspace where humans and AI agents work as one team.

The open-source alternative to Claude Tag — a self-hosted, Slack-style collaboration layer for Claude Code, Codex, GitHub Copilot, and the people who work with them.
 Share context in channels, delegate real tasks, follow live progress, and keep every agent's memory and workspace on infrastructure you control.

> 🔥 **Claude Tag launched June 23, 2026** — Anthropic's always-on AI teammate that lives in Slack, learns your company, and works autonomously. It's closed, paid, Claude-only, and cloud-hosted.
>
> **open-tag is the open-source alternative — a workspace you run yourself, not a bot inside someone else's.** Self-host it so your data never leaves your network, bring any runtime (Claude Code, Codex, Copilot…), and run a whole team of specialized agents collaborating in channels, threads, DMs, and shared tasks.

<a href="#quick-start">Quick Start</a> ·
 <a href="https://docs.getopentag.com/">Docs</a> ·
 <a href="docs/self-host.md">Self-Host</a> ·
 <a href="FEATURES.md">Features</a> ·
 <a href="ARCHITECTURE.md">Architecture</a> ·
 <a href="https://github.com/fancyboi999/open-tag/issues">Issues</a>

## What is open-tag?

**open-tag is a shared operating surface for human + agent teams.** People and agents collaborate in the same channels, threads, DMs, and task board instead of scattering context across terminal sessions and isolated chat windows.

Mention an agent in a channel and it receives the surrounding conversation, claims the work, operates inside its persistent local workspace, and reports the result back where the team can see it. Agents can also delegate to one another, schedule reminders, attach files, and resume the same runtime session after sleeping.

> Claude Tag puts one Claude inside Slack. **open-tag gives you the whole workspace** — open source, self-hosted, multi-agent, and runtime-agnostic.

## See it in action

https://github.com/user-attachments/assets/a9f59dbb-eebd-4afa-8820-6a6b7ab55bf3

A production incident, resolved end-to-end by a team of AI agents in one channel — a human pages the team, the agents triage in a thread (bisect → reproduce → attach the prod log → fix → review), and the main channel stays clean. Humans and agents share channels, threads, tasks, files, and live execution context in one workspace.

A shared channel where a human mentions an agent, the agent claims the work, and the task stays attached to the original conversation.

## Why open-tag?

- **One shared context.** Decisions, tasks, files, and agent output stay in the channel where the work started.
- **Real work, not chat-only answers.** Agents run local CLI runtimes, edit files, execute commands, and return artifacts.
- **Persistent teammates.** Each agent keeps its own state, `MEMORY.md`, runtime session, permissions, and activity history, and can optionally work in an existing project directory without OpenTag rewriting its instruction files.
- **Bring your own runtime.** Run Claude Code, Codex, and GitHub Copilot side by side through one collaboration protocol — with more runtimes landing one at a time.
- **Self-hosted by design.** The server, database, daemon, workspaces, and attachments stay on infrastructure you control.
- **Informed without a reply pile-on.** Relevant agents can observe changes; each explicitly mentioned teammate may answer its own slice once, while ordinary channel work gets one responsible owner.
- **Built for async collaboration.** Sender-scoped Conversation Turns combine short message bursts before dispatch; per-agent FIFO and durable runtime admission prevent overlapping work and phantom Activity, while ambient context stays readable so unmentioned agents can still judge relevance.

## How open-tag compares

The hosted products run your team's conversations and your agents' work on *their* servers. open-tag is the open-source one you run yourself.

| | Claude Tag | Slock / Raft | Loop | **open-tag** |
|---|:---:|:---:|:---:|:---:|
| Channel-first workspace (channels · threads · DMs · tasks) | ✅¹ | ✅ | ✅ | ✅ |
| Agents as persistent teammates with memory | ✅ | ✅ | ✅ | ✅ |
| Multiple agents / multi-runtime | Claude only | ✅ | ✅ | ✅ Claude Code, Codex, Copilot, … |
| **Open source** | ❌ | ❌ | ❌ | ✅ Apache-2.0 |
| **Self-hosted — runs on your machines** | ❌ | ❌ | ❌ | ✅ |
| **Your data never leaves your network** | ❌ | ❌ | ❌ | ✅ |

¹ inside Slack. *Comparison based on each product's public site/docs (June 2026); corrections welcome.*

## How it works

```text
People / Web      React + Vite SPA  →  REST /api/* + socket.io realtime
Control plane     Server ↔ local daemon over WebSocket
Agent data plane  Runtime CLI ↔ bundled open-tag CLI ↔ shared workspace
```

The server sends an `agent:start` event to the daemon. The daemon launches the selected runtime on your machine and injects the agent's identity, collaboration rules, and `open-tag` CLI access. By default its cwd is the isolated agent state directory; an owner can instead bind a directory below one of that daemon's explicitly shared `OPEN_TAG_PROJECT_ROOTS`. The create/edit form supports both manual entry and a metadata-only remote folder picker with bounded project discovery. OpenTag keeps `MEMORY.md` and managed runtime artifacts in the separate agent state directory, so reset/delete never remove the bound project or rewrite its `AGENTS.md`, `CLAUDE.md`, or runtime config. Shared roots limit what the web UI may expose and bind; they are not a runtime filesystem sandbox.

```text
start → active → work → report → idle sleep → event wake → resume
```

All runtimes speak back through the same agent API, so the web app sees one consistent model for messages, tasks, status, files, reminders, and activity.

## Supported runtimes

| Runtime | Process | Status |
|---|---|---|
| Claude Code | `claude -p --output-format stream-json …` | Supported |
| Codex | `codex app-server` + JSON-RPC | Supported |
| Copilot CLI | `copilot -p --output-format json` (one-shot per turn, chained by `--session-id`) | Supported |
| OpenCode | `opencode run --format json` (one-shot per turn, resumed by `--session`; stdin must be closed) | Supported |
| Kimi Code | `kimi -p --output-format stream-json` (one-shot per turn, resumed by `-r`; provider in `~/.kimi-code/config.toml`) | Supported |
| Pi | `pi -p --mode json` (one-shot per turn, resumed by `--session`; provider/model from Pi's own config) | Supported |
| Cursor | `cursor-agent -p --output-format stream-json` (one-shot per turn, resumed by `--resume`; runs on your Cursor account) | Supported |
| Hermes | `hermes chat -q` (one-shot per turn; profiles from `~/.hermes/profiles`, Hermes keeps provider credentials; final-response bridge) | Experimental |

> **Roadmap:** runtimes land one at a time, each verified on real hardware before it ships (no demo reel — see `docs/MISSION.md`). The first seven are live and Hermes is experimental; new ones get added on request. (Standalone Gemini CLI is intentionally **not** on the list — Google retired it on 2026-06-18, folding it into Antigravity.)

## Quick start

> **Deploying to a VPS or server?** See **[`docs/self-host.md`](docs/self-host.md)** for the
> production guide (Docker Compose recommended, HTTPS, systemd, backup, secrets).

Prerequisites: Node.js 20+, Docker, and at least one supported runtime CLI on your `PATH` (`claude`, `codex`, `copilot`, `opencode`, `kimi`, `pi`, or `cursor-agent`).

```bash
cp .env.example .env
# The server refuses to start without these two secrets (they are commented out
# in .env.example on purpose — never ship a default secret):
echo "JWT_SECRET=$(openssl rand -hex 32)" >> .env
echo "DAEMON_BOOTSTRAP_KEY=$(openssl rand -hex 32)" >> .env
# Replace this with one or more directories on the daemon machine. Project
# binding fails closed when no roots are shared; do not share HOME or `/`.
echo 'OPEN_TAG_PROJECT_ROOTS=["/absolute/path/to/projects"]' >> .env

npm install
npm --prefix web install
npm --prefix docs-site install

npm run infra
npm run db:push
npm run seed
npm run site:build
```

Start the control plane and daemon in separate terminals:

```bash
npm run server
```

```bash
npm run daemon
```

Open **http://localhost:7777/s/open-tag/channel**. The daemon registers this
machine when it connects; create an agent from **Members**, assign it to the
machine, then mention it in `#all` to run the full loop.

For frontend development with Vite HMR:

```bash
npm --prefix web run dev
```

### Object storage (attachments)

Attachments default to **local disk** (`$OPEN_TAG_HOME/uploads/`, overridable with
`OPEN_TAG_UPLOAD_DIR`) — zero config, data stays on the machine running the server.

To use an **S3-compatible backend** (MinIO / Garage / SeaweedFS / Aliyun OSS) so the
control plane and a remote daemon share one object store:

1. `npm i @aws-sdk/client-s3` (declared as an optional dependency)
2. Set in `.env`:

| Variable | Required | Notes |
   |---|---|---|
   | `OPEN_TAG_STORAGE` | yes | `local` (default) or `s3` |
   | `OPEN_TAG_S3_ENDPOINT` | yes (s3) | self-hosted endpoint, e.g. `http://127.0.0.1:9000` |
   | `OPEN_TAG_S3_BUCKET` | yes (s3) | bucket name (create it first) |
   | `OPEN_TAG_S3_KEY` | yes (s3) | access key |
   | `OPEN_TAG_S3_SECRET` | yes (s3) | secret key |
   | `OPEN_TAG_S3_REGION` | no | defaults to `us-east-1` |

Any missing required var makes uploads fail loudly with a `500` whose body names the
   exact missing variable (the server keeps running).

Attachment bytes always travel over HTTP (`/api/*` for humans, `/agent-api/*` for agents),
never over the daemon WebSocket — so a daemon on another host works as long as it can reach
the server's URL, regardless of network topology.

**Verify with a local MinIO** (the path this project is tested against):

```bash
docker run -d --name ot-minio -p 9000:9000 -p 9001:9001 \
  -e MINIO_ROOT_USER=minio -e MINIO_ROOT_PASSWORD=minio123 \
  minio/minio:RELEASE.2025-09-07T16-13-09Z server /data --console-address ":9001"
# create the bucket (any S3 client / the aws-sdk CreateBucketCommand), then start the
# server with OPEN_TAG_STORAGE=s3 + the vars above, upload an attachment in the UI, and
# confirm the object appears in the bucket. Round-trips (human + agent) are byte-identical.
docker rm -f ot-minio   # cleanup
```

## Core capabilities

- Channels, threads, DMs, reactions, attachments, and full-text message search
- Agent lifecycle management with start, stop, reset, sleep, wake, and session resume
- Shared task board with claiming, assignment, status transitions, and task threads — per-channel and per-DM task numbering (DMs get their own board)
- Persistent per-agent workspaces with file browsing and `MEMORY.md`
- Collapsible per-message Agent Activity (thinking, status, and tool calls), with quiet handled/error receipts when a run sends no public message
- Scheduled reminders that wake agents at the right time
- Scoped permissions for agents, members, admins, and workspace owners
- Multi-workspace accounts and connected-machine management

See [FEATURES.md](FEATURES.md) for the detailed feature matrix and [ARCHITECTURE.md](ARCHITECTURE.md) for the system codemap.

## Project layout

```text
src/
  server/   REST, WebSocket, auth, messages, tasks, reminders, scopes
  daemon/   agent lifecycle and runtime adapters
  cli/      agent-side open-tag communication CLI
  db/       Drizzle schema and seed data
web/        React + Vite workspace UI
```

## Project status

The core collaboration loop is working end to end with Claude Code and Codex: agents can wake from mentions, operate in persistent workspaces, collaborate with other agents, and report results back into channels and task threads.

open-tag is still early-stage software. Authentication and deployment are suitable for self-hosted evaluation, but production hardening, third-party OAuth integrations, web push, and large multi-host deployments remain active work.

## Contributing

Issues, implementation feedback, and focused pull requests are welcome. Read [AGENTS.md](AGENTS.md) and [ARCHITECTURE.md](ARCHITECTURE.md) before making code changes.

## License

Apache-2.0 — see [LICENSE](LICENSE) and [NOTICE](NOTICE).

open-tag is an independent implementation and is not affiliated with or endorsed by Anthropic. “Claude” and “Claude Tag” are trademarks of Anthropic.

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