v0.2.0 — I/O 26 refresh

What's new

Default model bumps (all existing tools)

Every tool's built-in default is now the newest model available on Google AI Studio (preview included). Users who relied on the v0.1.x defaults and want to pin will find a per-tool recipe in docs/migration-v0.2.md.

Tool	v0.1.x default	v0.2.0 default
gemini_generate	gemini-2.5-pro	gemini-3.1-pro-preview
gemini_generate_image	gemini-2.5-flash-image	gemini-3.1-flash-image-preview
gemini_generate_image_imagen	imagen-4.0-generate-001	imagen-4.0-ultra-generate-001
gemini_code_execute	gemini-2.5-pro	gemini-3.1-pro-preview-customtools
gemini_search_grounded	gemini-2.5-flash	gemini-3.5-flash
gemini_analyze_file	gemini-2.5-pro	gemini-3.1-pro-preview
gemini_chat	gemini-2.5-flash	gemini-3.5-flash
gemini_start_video	veo-3.0-generate-001	veo-3.1-generate-preview

The Veo flip also resolves the 2026-06-30 sunset of veo-3.0-generate-001.

Three new tools

gemini_generate_music — Text-to-music via Lyria 3. Returns a WAV file.

Tool: gemini_generate_music
  prompt: "upbeat lo-fi piano loop for studying"

gemini_tts — Text-to-speech with single-voice and multi-speaker support. Returns a WAV file.

Tool: gemini_tts
  text: "Hello from Gemini."
  voice: "Kore"

gemini_start_research + gemini_get_research_report — Deep Research polling pair. Start returns an operation_id; poll until done to get a Markdown report with citations. Runs in a background thread so the MCP server stays responsive during multi-minute synthesis.

Tool: gemini_start_research
  prompt: "What are the main tradeoffs between RAG and fine-tuning for LLM applications?"

Migration guide

docs/migration-v0.2.md lists every default flip and shows how to pin to the old model if you need stability.

Other changes

• 69 unit tests (up from 49)
• Updated infographic showing all 13 tools
• docs/migration-veo-3.1.md superseded by docs/migration-v0.2.md