Lets Claude Code offload cheap, mechanical tasks to opencode's free models for codebase summaries, exploration, web research, and bulk edits, saving paid tokens.
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process.env. You'll be asked to provide them before it can run.SystemDriveSystemRootOPENCODE_MCP_ALLOWED_DIRS— including their subtrees. Optionally setOPENCODE_MCP_MAX_TEXT— 40000 Truncate the worker's answer beyond this many chars (truncated: true).OPENCODE_MCP_BIN— auto-detect Path to the opencode executable. Auto-detection: PATH, then the real opencode.exe behind npm .cmd shims on Windows, then ~/.opencode/bin/opencode.OPENCODE_MCP_MODEL— opencode/deepseek-v4-flash-free Default model id.OPENCODE_MCP_TIMEOUT— 180 Default per-call timeout (s); per-call timeout_sec clamps to 10–570.OPENCODE_MCP_STATE— ~/.local/state/opencode-mcp / %LOCALAPPDATA%\opencode-mcp Where sessions.json lives.[](https://m8ven.ai/mcp/rajib884-opencode-mcp-5wdttb)