v3.50.0.mdx

description	Roo Code 3.50.0 adds Gemini 3.1 Pro support across Gemini and Vertex providers, and ships CLI v0.1.0 with an NDJSON stdin protocol and list subcommands.
keywords	roo code 3.50.0 gemini 3.1 pro cli v0.1.0 ndjson stdin

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)