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Roo Code 3.50.0 Release Notes (2026-02-19)

This release adds Gemini 3.1 Pro as the new default Gemini model and ships CLI v0.1.0 with a structured NDJSON stdin protocol and programmatic list subcommands.

Gemini 3.1 Pro Support​

Gemini 3.1 Pro (gemini-3.1-pro-preview) is now available in both the Gemini and Vertex providers and replaces Gemini 3 Pro as the default model. The model is also available via the Gemini custom-tools endpoint (gemini-3.1-pro-preview-customtools). Reasoning effort medium is supported, so your existing reasoning settings carry over without silently falling back. (#11608)

CLI v0.1.0​

The Roo Code CLI reaches v0.1.0 with three headline changes:

  • NDJSON Stdin Protocol: The stdin prompt stream has been overhauled from raw text lines to a structured NDJSON command protocol supporting start, message, cancel, ping, and shutdown commands with requestId correlation, ack/done/error lifecycle events, and queue telemetry. This enables reliable, scriptable automation pipelines. (#11597)
  • List Subcommands: New list commands, list modes, and list models subcommands provide programmatic discovery of available CLI resources in both JSON and text output formats. (#11597)
  • Modularized Architecture: The run.ts entry point has been reduced from ~900 lines to ~330 lines by extracting stdin stream logic into a dedicated stdin-stream.ts module. (#11597)