why

New model dropped

what changed

Added support for the Gemini 3.5 Flash Computer Use updated toolset in GoogleCUAClient.ts, with all new tool formats correctly mapped.

test plan

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Summary by cubic

Adds support for the google/gemini-3.5-flash computer-use agent. Normalizes Gemini 3.x tool names/args to 2.5 handlers, preserves click semantics, validates coordinates (rejects missing/NaN/Infinity), always returns a fresh screenshot, and surfaces reasoning/cached tokens.

• New Features

  • Enable google/gemini-3.5-flash in agent/LLM provider maps and public types; update tests.
  • Map 3.x functions to 2.5 handlers and accept new arg shapes: coordinate-less type, keys array or single key, magnitude_in_pixels for scroll, drag start/end pairs; recognize screenshot/take_screenshot; coordinate-less scroll falls back to PageUp/PageDown; alias wait to wait_5_seconds.
  • Always return a screenshot function response even when no executable actions are produced.

• Bug Fixes

  • Track reasoning_tokens and cached_input_tokens in Google CUA usage (per step and aggregated).
  • Preserve 3.x click-family semantics (double_click, triple_click, right_click, middle_click, move) and drop calls with missing or non‑finite coordinates; add explicit click_at guard and a shared finite-number check; add unit tests for conversion/guards.
  • Guard required args and log custom‑tool collisions: reject navigate without url and type/type_text_at without text (empty allowed); log when a custom tool name conflicts with a predefined function (predefined wins).