Muse Spark 1.3 inside Claude Desktop

# Claude Desktop × Muse Spark 1.3 via OpenCode Go

> Run **Muse Spark 1.3 Contributor** (and any OpenCode Go model) inside **Claude Desktop** on macOS via a local translation proxy — no Claude Pro plan needed.

[![OpenCode Go](https://img.shields.io/badge/OpenCode%20Go-%2410%2Fmo-8A2BE2)](https://opencode.ai/docs/go/) [![Claude Desktop](https://img.shields.io/badge/Claude%20Desktop-3P%20Gateway-black)](https://claude.ai) [![Muse Spark](https://img.shields.io/badge/Muse%20Spark-1.3%20Contributor-0467DF)](https://opencode.ai/docs/go/) [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](LICENSE)

**[English](#english) | [Türkçe](#türkçe) | [Hazır Prompt / Ready Prompt](#hazır-prompt--ready-prompt)**

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## 🇬🇧 English — How This System Works

### Overview

This repo documents the exact setup we built to run **Muse Spark 1.3 Contributor** (free under OpenCode Go Contributor program) inside **Claude Desktop** on macOS — the same UI you use for Claude Pro, but backed by a custom `inferenceGateway`.

Claude Desktop does **not** support custom models natively. On macOS it runs in **3P (third-party) mode** via files under `~/Library/Application Support/Claude-3p/configLibrary/`. We front it with a tiny Node proxy (`~/.claude-go/proxy.mjs`) that translates Anthropic → OpenAI and handles the special case of Muse Spark.

```
┌─────────────────┐      Anthropic API       ┌──────────────────┐      OpenAI API (translated)      ┌─────────────────────────────┐
│ Claude Desktop  │  ─────────────────────►  │  proxy.mjs       │  ─────────────────────────────►  │  opencode.ai/zen/go/v1      │
│ (3P Gateway)    │  http://127.0.0.1:8765   │  127.0.0.1:8765    │  /responses (Muse Spark)         │  Muse Spark 1.3 Contributor │
│ 3P mode         │  ◄─────────────────────  │  (Node)          │  ◄─────────────────────────────  │  DeepSeek / GLM / Kimi ...  │
└─────────────────┘                          └──────────────────┘                                  └─────────────────────────────┘
         ▲                                            │                                                     │
         │ MCP (stdio)                                │ CLAUDE_GO_KEY                                         │ Bearer sk-... (Go subscription)
         │ npx -y opencode-mcp                        │ sk-...