bug(ai): Typescript compilation error: TS2304: Cannot find name 'TemplateRequestInternal'. in version 12.12.0 ai-public.d.ts

[anisabboud]

Operating System

Linux

Environment (if applicable)

Typescript

Firebase SDK Version

12.12.0

Firebase SDK Product(s)

AI

Project Tooling

Angular 21 (latest), Typescript

Firebase JS SDK version 12.12.0 released April 9, 2026 (previous version 12.11.0 compiles just fine)
https://firebase.google.com/support/release-notes/js#version_12120_-_april_9_2026

Detailed Problem Description

✘ [ERROR] TS2304: Cannot find name 'TemplateRequestInternal'. [plugin angular-compiler]

    node_modules/@firebase/ai/dist/ai-public.d.ts:3162:90:
      3162 │ ...emplateChatParams, TemplateRequestInternal, TemplateFunctionD...
           ╵                       ~~~~~~~~~~~~~~~~~~~~~~~

Steps and code to reproduce issue

ng serve / ng build

[hsubox76]

Working on a fix (#9840), in the meantime roll back to 12.11.0 if you are experiencing this.