fusion-mcp

Local Fusion MCP server — replicates the OpenRouter Fusion mechanism on your local Claude CLI subscription. No OpenRouter, no separate token bill, one wallet.

Instead of dispatching to many vendors, it fans out several headless claude -p calls, each given a distinct analytical lens, then runs a judge pass and a synthesis pass.

Pipeline

Tool

fusion_research(question, panel="default")

Panels:

• default / frontier — Opus 4.8
• budget — haiku + sonnet (use for frequent calls)

Install

python3 -m venv .venv
.venv/bin/pip install "mcp[cli]"
claude mcp add -s user fusion -- /ABS/PATH/.venv/bin/python /ABS/PATH/fusion_mcp.py

-s user → server visible in all folders. Use absolute paths.

Cost

Each call ≈ panel_size + 2 full Claude turns, 2-3x slower than a single call. Binding limit is the subscription request rate / usage quota, not dollars. Call sparingly — reserve for expensive questions: architecture decisions, comparing approaches, best-practice research.

Statusline (optional)

Server writes an atomic JSON heartbeat to $XDG_RUNTIME_DIR/fusion-mcp/state.json. Reader fusion-status.sh (bash + jq) prints e.g. 🔮 fusion[panel] 2/3 panel. Wire into statusLine.command in settings.json.