chore: migrate to official ThinkingLevel enum when @google/genai upgrades #28

Summary

This is a tracking issue / reminder - not a bug or problem. The current implementation works correctly.

When @google/gemini-cli-core upgrades its dependency on @google/genai to a version that exports the ThinkingLevel enum (v1.34.0+), we should migrate from our locally-defined enum to the official one.

Current State

In PR #28 / commit c120533, we added thinkingConfig support for Gemini 3's thinking mode. Because @google/gemini-cli-core (all versions through 0.22.0-preview.2) depends on @google/genai v1.30.0, which does not export the ThinkingLevel enum, we defined our own:

// src/gemini-language-model.ts
export enum ThinkingLevel {
  LOW = 'LOW',
  MEDIUM = 'MEDIUM', 
  HIGH = 'HIGH',
  MINIMAL = 'MINIMAL',
}

This enum is re-exported from src/index.ts for users.

When to Act

Monitor these dependencies:

• @google/gemini-cli-core upgrades to use @google/genai >= 1.34.0
• @google/genai v1.34.0+ exports ThinkingLevel enum (confirmed it does)

Migration Steps

When the time comes:

1. Update dependencies

   npm update @google/gemini-cli-core

2. Update imports in src/gemini-language-model.ts:

   // Remove local enum definition
   // Add import:
   import { ThinkingLevel } from '@google/genai';

3. Update re-export in src/index.ts:

   // Change from:
   export { ThinkingLevel } from './gemini-language-model';
   // To:
   export { ThinkingLevel } from '@google/genai';

4. Remove type workarounds:

   • Remove ExtendedThinkingConfig type alias
   • Remove the cast as GenerateContentConfig['thinkingConfig']

5. Verify enum values match - The official enum uses:

   enum ThinkingLevel {
     THINKING_LEVEL_UNSPECIFIED = "THINKING_LEVEL_UNSPECIFIED",
     LOW = "LOW",
     MEDIUM = "MEDIUM",
     HIGH = "HIGH",
     MINIMAL = "MINIMAL"
   }

   Our local enum matches (minus UNSPECIFIED which we don't need).

6. Run tests to ensure nothing breaks

Files Affected

• src/gemini-language-model.ts - Local enum definition + type workarounds
• src/index.ts - Re-export source

Labels

• enhancement
• good first issue
• dependencies