Meridian

Quick start ·
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  Desktop ·
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Meridian connects coding clients to Claude and Antigravity using your subscription.
Run Pi, OpenCode or another supported client against a local API, and manage
providers, requests and usage from a browser or the optional Mac app.

Claude requests run through Anthropic’s Agent SDK. Antigravity requests run
through Google’s official, signed-in agy CLI. Account permissions, model
availability and subscription limits still apply.

Quick start

For the released Claude backend, install Node.js 22+, then:

Open http://127.0.0.1:3456. For OpenCode V1, run meridian setup and restart
OpenCode. For Pi and other clients, follow the client setup guide.
See configuration for API-key protection and Windows
setup, or deployment for Docker and Nix.

Try Antigravity

Antigravity is included in Meridian 1.74.0 and later as a preview.
The verified setup uses agy 1.2.7, Pi 0.72.1 or OpenCode V1 1.18.31,
and macOS on Apple Silicon. Other versions need their own verification.

Install Node.js 22+ and the
official Antigravity CLI. Run agy to sign in with
your subscription account and disable paid overage credits in its settings.
Then install Meridian:

Open http://127.0.0.1:3457/providers and use Connect Pi / OpenCode, or follow
the CLI setup instructions.
For a source build, follow the development guide.
The tool bridge lets the client execute tools with its own permissions. The
SQLite path enables saved state across service restarts; it does not guarantee
recovery of an unfinished action.

What works

- The coding loop: incremental text, client tools, parallel tool batches,
  approvals, questions, cancellation and client-owned plugins/delegation.
- Model and output selection: available model/effort variants, forced…