fix: respect user-configured dimensions setting in file index

[roomote]

Fixes #5754

Problem

RooCode was ignoring the dimensions setting in the file index configuration. When users configured the system to use 1536 dimensions, it would still try to use 1024 dimensions, causing a vector dimension error in Qdrant: "Vector dimension error: expected dim: 1536, got 1024".

Root Cause

The issue was in src/core/webview/ClineProvider.ts at line 1545, where there was a hardcoded fallback value of 1536 for the dimension setting:

codebaseIndexEmbedderModelDimension: codebaseIndexConfig?.codebaseIndexEmbedderModelDimension ?? 1536,

This hardcoded fallback was overriding the proper dimension resolution logic in the service factory.

Solution

Removed the hardcoded ?? 1536 fallback to allow the proper dimension resolution hierarchy to work:

1. User configuration (modelDimension from config)
2. Model-specific defaults (getModelDimension() from embedding model profiles)
3. System defaults (handled by service factory)

Changes

• src/core/webview/ClineProvider.ts: Removed hardcoded 1536 dimension fallback on line 1545

Testing

• ✅ TypeScript compilation passes
• ✅ All code-index service factory tests pass (37/37)
• ✅ All embedder tests pass (103/103)
• ✅ Linting passes

Technical Details

The system has a sophisticated dimension handling mechanism:

• Built-in model profiles with predefined dimensions (e.g., "text-embedding-3-small": 1536, "mxbai-embed-large": 1024)
• Custom dimension configuration as fallback
• Service factory that resolves the final dimension
• Vector store initialization that validates dimensions

The fix ensures that user-configured dimensions are properly respected by allowing the dimension resolution to follow the proper hierarchy instead of being overridden by a hardcoded value.

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Important

Removed hardcoded dimension fallback in ClineProvider.ts to respect user-configured settings.

• Behavior:
  • Removed hardcoded fallback of 1536 dimensions in ClineProvider.ts to respect user-configured dimensions.
• Technical Details:
  • Ensures dimension resolution hierarchy: user configuration, model-specific defaults, system defaults.

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