Tessera

Run more agents. Lose less context.

The local control room for Claude Code, Codex, and OpenCode—parallel sessions, isolated worktrees, Kanban, Git, and mobile access in one place.

Download Tessera · Run with npm

One workspace for the entire agent loop

Tessera turns a pile of terminals into a visible workflow. Give each task its own session and isolated worktree, follow every agent without hunting through windows, and take the result all the way to a pull request.

• Delegate in parallel — run independent tasks without agents stepping on the same branch.
• Use the right agent and model — mix Claude Code, Codex, and OpenCode in PTY or GUI mode, including custom model IDs.
• Keep every session within reach — move between list, board, tabs, split panes, and your phone without losing the conversation.
• Finish where the work happened — inspect files and diffs, commit, sync, publish branches, and open pull requests from Tessera.

[!NOTE] Tessera runs locally and uses the provider CLIs already installed and authenticated on your machine.

Let the lead agent run the workspace

Invoke /tessera-cli inside a managed Claude Code, Codex, or OpenCode session. A lead agent can create isolated worktrees, launch parallel sessions, wait for results, inspect their output, and send follow-up prompts—while every worker stays visible in Tessera.

Representative operations: status · worktree create · session launch · session wait / session read · session prompt

Turn parallel sessions into a delivery pipeline

The Kanban board tracks direct chats and worktree-backed tasks across Chat, Todo, Doing, Review, and Done. Move cards as work progresses, see live agent and diff state, and open the linked PTY or GUI session without leaving the board.

Keep coding from your phone

Pair a device from Settings → Remote access. Continue PTY and GUI sessions, switch a PTY into Chat View, and open the session or Files/Git panels from mobile.

PTY speed, chat readability

Open a Codex or OpenCode PTY and press the chat icon in its header. Chat View turns the live terminal conversation into a focused, readable thread without stopping the PTY underneath.

Create and refine images without leaving the session

Open the Images tab in a Codex terminal session to see generated images, their reference inputs, and prompts together. Download a result or drag it into your next prompt.

Finish the Git workflow without switching apps

Edit project files, review diffs, select changes, commit, sync, publish branches, and open pull requests without leaving the session.

Built for real-world agent work

Built for	What you get
Claude Code, Codex, and OpenCode	Start any supported provider in PTY or rich GUI mode and keep its conversation, tools, and state visible.
Projects and sessions	Collections, persistent tabs, split panes, list view, and a task-aware Kanban board.
Terminal and GUI	Run PTY sessions and rich conversations side by side in the same workspace.
Custom models	Add custom model IDs in Settings and select them when starting a session.
Live context	Follow tool calls, failures, instructions, memory, file changes, diffs, and branch state.
Task-aware Git	Keep tasks, sessions, worktrees, and pull requests connected from start to finish.

Install

Desktop app

Download from GitHub Releases.

Platform	Asset
Windows, including WSL	Portable .exe
macOS	.dmg for Apple Silicon or Intel
Linux beta	.deb

Windows builds are not code-signed yet, so SmartScreen may show an unknown-publisher warning. macOS builds are signed and notarized with Apple Developer ID.

Browser runtime

Requires Node.js 20.9+ (20.x) or Node.js 22–26, plus npm 10 or later.

npm install -g @horang-labs/tessera
tessera

Open the printed local URL.

Docker Compose

mkdir -p data/config data/local data/ssh data/codex data/tessera workspaces
touch data/gitconfig
docker compose up --build -d

Open http://127.0.0.1:32123. If bind mounts are not writable:

sudo chown -R 1000:1000 data workspaces

First Run

On first run, Tessera guides you through:

1. Creating a local account for the browser runtime.
2. Checking that a supported CLI is installed and authenticated.
3. Selecting a project folder.
4. Starting a chat or worktree-backed task.

Authenticate provider CLIs first, for example with claude login, codex login, or OpenCode's configured provider credentials.

Build From Source

For development, clone the repository and install dependencies:

Source development requires Node.js 20.9+ (20.x) or Node.js 22–26, plus npm 10 or later.

git clone https://github.com/horang-labs/tessera.git
cd tessera
npm install

Tessera uses a custom Node.js server for the Next.js app, WebSocket transport, database initialization, provider bootstrapping, and background pollers. The dev script starts that server:

npm run dev

Supported environment variables:

Variable	Default	Purpose
TESSERA_DATA_DIR	~/.tessera	App data root for the database, local users, auth keys, settings, worktrees, attachments, and session history
PORT	3000 from source, 32123 from the npm CLI	HTTP server port for source and npm runs
TESSERA_HOST	127.0.0.1	Host interface for source and npm runs. HOST is also accepted by the source server
LOG_LEVEL	info	Backend log level: debug, info, warn, or error
CLAUDE_CONFIG_DIR	~/.claude	Override the Claude Code config directory used for skill discovery

Desktop release builds use Electron:

Target	Command
Windows portable .exe	npm run electron:build:win
macOS Apple Silicon dev .dmg	npm run electron:build:mac-arm64

Electron build outputs are written under release/.

Stored Data And Privacy

Tessera runs locally, stores app data under ~/.tessera/ by default, and sends provider requests through the Claude Code, Codex, or OpenCode CLI installed on your machine.

Published builds include anonymous product-interaction telemetry that you can disable during onboarding or in Settings. This includes which named controls and features are used, anonymous Tessera CLI operation names, and a coarse mobile-or-desktop classification computed locally, but never visible UI text, prompts, messages, CLI arguments, file paths, command output, repository names, raw device details, or account details.

Teams And Design Partners

Tessera is currently focused on individual local workflows, but we are preparing team and enterprise features for companies running coding agents across multiple developers.

The team product is being shaped around three areas: shared workspaces for parallel agent work, governance for permissions and tool use, and operational visibility into agent usage, cost, and review state.

If your team wants to use Tessera in production, join the design partner waitlist.

Roadmap

Planned areas include:

Area	Direction
Cloud team collaboration	Shared projects, team-visible task state, and collaborative review workflows
Enterprise governance	Permission management, tool-use policies, audit trails, and controls for blocked or unapproved agent actions
Agent operations analytics	Visibility into agent efficiency, model/provider usage, and cost patterns across a team workspace
Team memory	Shared project context and team-specific agent memory for recurring workflows
Multi-agent collaboration	A lead agent that coordinates task creation, review, Git workflow management, and parallel worker agents
Tessera-native agent	A built-in agent experience in addition to external CLI providers
Web debugging	Browser inspection, logs, screenshots, and frontend debugging context

License

Tessera is open source under the GNU Affero General Public License v3.0 (AGPL-3.0).

Copyright (c) 2026 Horang Labs, Inc.

See the LICENSE file for the full text.