rynfar/meridian

Try Antigravity ·
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Documentation ·
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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.
| Claude | Antigravity |
| :--- | :--- |
| **Released** · Claude Agent SDK | **Preview · v1.74.0+** · Official agy CLI |
| Persistent sessions, prompt caching and multiple account profiles | Streaming, client tools, conversation reuse and saved-answer recovery |
| Client compatibility and setup | Pi and OpenCode setup |
| Headless macOS, Linux and Windows | Authenticated acceptance on macOS arm64; Linux/Windows verification unfinished |
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 tools
and validated structured output.
- **Client APIs:** Anthropic Messages, OpenAI Chat Completions and a documented
Responses subset.
- **Attachments:** images and public HTTPS image URLs; documents, speech and
video through local conversion. These are not native media APIs.
- **Continuity:** warm conversation reuse, eligible completed-session restoration,
history replay and bounded recovery of saved answers and tool IDs.
- **Provider management:** web and macOS setup, separate quota/status displays,
shared navigation and activity. Native browser/subagent access requires
separate explicit grants.
What is unfinished
Active-task reattachment and automatic reconciliation of uncertain tool outcomes
are unfinished. Some provider-specific plugins, hosted-tool/file contracts and
client versions need adapters and acceptance tests. Authenticated Linux/Windows
verification is also outstanding.
The CLI does not expose exact output-token caps, numeric thinking budgets,