feat(js/plugins/google-genai): Increased max download size for inline media...

[ifielker]

from 10MB to 100MB (to match API limits).

• Enabled "External URLs" support for Gemini 2.5/3.0+ models by bypassing media download for public URLs in the downloadRequestMedia middleware.
• Retained existing download behavior ("Inline Data") for Gemini 2.0 models which do not support external URLs.

Checklist (if applicable):

• PR title is following https://www.conventionalcommits.org/en/v1.0.0/
• Tested (manually, unit tested, etc.)
• Docs updated (updated docs or a docs bug required)

[gemini-code-assist]

Summary of Changes

Hello @ifielker, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request enhances the Google GenAI plugin's media handling capabilities by increasing the maximum download size for inline media and introducing support for external URLs in newer Gemini models. The changes ensure that the plugin aligns with the latest API features and limits, allowing for more efficient processing of media content while maintaining compatibility with older model versions.

Highlights

• Increased Media Download Limit: The maximum allowed size for inline media downloads has been increased from 10MB to 100MB, aligning with Google AI API limits.
• External URL Support for Newer Gemini Models: Enabled direct passing of external HTTP/HTTPS URLs to the API for Gemini 2.5/3.0+ models, bypassing the media download middleware.
• Gemini 2.0 Media Handling: Maintained the existing behavior for Gemini 2.0 models, which continue to download and inline media from external URLs as they do not support direct external URL references.
• New Test Coverage: Added new unit tests and example flows to verify the distinct media handling behaviors for Gemini 2.0 and newer models when processing external URLs.

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Changelog

• js/plugins/google-genai/src/googleai/gemini.ts
  • Increased the maximum allowed download size for inline media from 10MB to 100MB.
  • Introduced a conditional check for Gemini 2.0 models to differentiate media handling logic.
  • Modified the media download filter to bypass downloading external HTTP/HTTPS URLs for Gemini models newer than 2.0.
• js/plugins/google-genai/tests/googleai/gemini_test.ts
  • Added a new test suite for media handling to verify external URL behavior.
  • Included a test case to confirm that non-Gemini 2.0 models pass external URLs directly to the API as fileUri.
• js/testapps/basic-gemini/src/index.ts
  • Added new test flows to demonstrate external URL handling for Gemini 2.0 models, showing the download and inline approach.
  • Added new test flows to demonstrate external URL handling for Gemini 3.0 models, showing the direct fileUri approach.

Activity

• No human activity has been recorded on this pull request yet.

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Code Review

The pull request increases the maximum download size for inline media from 10MB to 100MB and introduces logic to bypass media download for public URLs for Gemini 2.5/3.0+ models, while retaining it for Gemini 2.0 models. New tests and test flows have been added to validate this behavior. The changes are well-implemented and address the stated objectives.