AI Hybrid Inference: guard against undefined mode

[erikeldridge]

Problem Statement

I was using the e2e test and noticed it was throwing an exception from countToken.

We intentionally throw from countToken in the hybrid case, but it was surprising to see that error in the non-hybrid case.

Turns out, mode is undefined in the non-hybrid case, but we weren't guarding for that.

Solution

Explicitly guard against an undefined mode

[changeset-bot]

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Latest commit: 205a25b

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[github-actions]

Vertex AI Mock Responses Check ⚠️

A newer major version of the mock responses for Vertex AI unit tests is available. update_vertexai_responses.sh should be updated to clone the latest version of the responses: v13.0

[google-oss-bot]

Size Report ¹

Affected Products

• @firebase/ai

  Type	Base (50f142a)	Merge (00a5ee3)	Diff
  browser	47.9 kB	48.0 kB	+103 B (+0.2%)
  main	49.1 kB	49.2 kB	+103 B (+0.2%)
  module	47.9 kB	48.0 kB	+103 B (+0.2%)

• firebase

  Type	Base (50f142a)	Merge (00a5ee3)	Diff
  firebase-ai.js	37.8 kB	37.9 kB	+94 B (+0.2%)
  firebase-vertexai.js	37.8 kB	37.9 kB	+94 B (+0.2%)

Test Logs

• Base (50f142a): https://github.com/firebase/firebase-js-sdk/actions/runs/15030495776
• Merge (00a5ee3): https://github.com/firebase/firebase-js-sdk/actions/runs/15049152589

1. https://storage.googleapis.com/firebase-sdk-metric-reports/nwLnTwDGqH.html

[google-oss-bot]

Size Analysis Report ¹

Affected Products

• @firebase/ai

  • getGenerativeModel

    Size

    Type	Base (50f142a)	Merge (00a5ee3)	Diff
    size	27.7 kB	27.8 kB	+98 B (+0.4%)
    size-with-ext-deps	46.8 kB	46.9 kB	+99 B (+0.2%)

Test Logs

• Base (50f142a): https://github.com/firebase/firebase-js-sdk/actions/runs/15030495776
• Merge (00a5ee3): https://github.com/firebase/firebase-js-sdk/actions/runs/15049152589

1. https://storage.googleapis.com/firebase-sdk-metric-reports/gmjfCx4i7J.html