fix: make embedding model ID matching case-insensitive

- Updated getModelDimension, getModelScoreThreshold, and getModelQueryPrefix to perform case-insensitive matching
- Fixes issue where custom providers using different casing (e.g., Qwen/Qwen3-Embedding-8B) were not recognized
- Added comprehensive tests for case-insensitive model matching

Fixes #9026

Author: roomote

src/shared/__tests__/embeddingModels.spec.ts

@@ -0,0 +1,155 @@
+import { describe, it, expect } from "vitest"
+import {
+	getModelDimension,
+	getModelScoreThreshold,
+	getModelQueryPrefix,
+	getDefaultModelId,
+	EMBEDDING_MODEL_PROFILES,
+} from "../embeddingModels"
+
+describe("embeddingModels", () => {
+	describe("getModelDimension", () => {
+		it("should return the correct dimension for a valid model", () => {
+			expect(getModelDimension("openai", "text-embedding-3-small")).toBe(1536)
+			expect(getModelDimension("openai", "text-embedding-3-large")).toBe(3072)
+			expect(getModelDimension("openrouter", "qwen/qwen3-embedding-8b")).toBe(4096)
+		})
+
+		it("should be case-insensitive for model IDs", () => {
+			// Test with different case variations
+			expect(getModelDimension("openai", "TEXT-EMBEDDING-3-SMALL")).toBe(1536)
+			expect(getModelDimension("openai", "Text-Embedding-3-Large")).toBe(3072)
+			expect(getModelDimension("openrouter", "Qwen/Qwen3-Embedding-8B")).toBe(4096)
+			expect(getModelDimension("openrouter", "QWEN/QWEN3-EMBEDDING-8B")).toBe(4096)
+
+			// Test with mixed case for other providers
+			expect(getModelDimension("gemini", "TEXT-EMBEDDING-004")).toBe(768)
+			expect(getModelDimension("mistral", "CODESTRAL-EMBED-2505")).toBe(1536)
+		})
+
+		it("should return undefined for non-existent model", () => {
+			expect(getModelDimension("openai", "non-existent-model")).toBeUndefined()
+		})
+
+		it("should return undefined for non-existent provider", () => {
+			// @ts-expect-error Testing with invalid provider
+			expect(getModelDimension("non-existent-provider", "text-embedding-3-small")).toBeUndefined()
+		})
+
+		it("should handle lowercase model IDs that exist in profiles", () => {
+			expect(getModelDimension("openai", "text-embedding-ada-002")).toBe(1536)
+			expect(getModelDimension("ollama", "nomic-embed-text")).toBe(768)
+		})
+	})
+
+	describe("getModelScoreThreshold", () => {
+		it("should return the correct score threshold for a valid model", () => {
+			expect(getModelScoreThreshold("openai", "text-embedding-3-small")).toBe(0.4)
+			expect(getModelScoreThreshold("ollama", "nomic-embed-code")).toBe(0.15)
+			expect(getModelScoreThreshold("openrouter", "qwen/qwen3-embedding-8b")).toBe(0.4)
+		})
+
+		it("should be case-insensitive for model IDs", () => {
+			// Test with different case variations
+			expect(getModelScoreThreshold("openai", "TEXT-EMBEDDING-3-SMALL")).toBe(0.4)
+			expect(getModelScoreThreshold("ollama", "NOMIC-EMBED-CODE")).toBe(0.15)
+			expect(getModelScoreThreshold("openrouter", "Qwen/Qwen3-Embedding-8B")).toBe(0.4)
+
+			// Test models without score thresholds
+			expect(getModelScoreThreshold("gemini", "TEXT-EMBEDDING-004")).toBeUndefined()
+		})
+
+		it("should return undefined for model without score threshold", () => {
+			expect(getModelScoreThreshold("gemini", "text-embedding-004")).toBeUndefined()
+		})
+
+		it("should return undefined for non-existent model", () => {
+			expect(getModelScoreThreshold("openai", "non-existent-model")).toBeUndefined()
+		})
+
+		it("should return undefined for non-existent provider", () => {
+			// @ts-expect-error Testing with invalid provider
+			expect(getModelScoreThreshold("non-existent-provider", "text-embedding-3-small")).toBeUndefined()
+		})
+	})
+
+	describe("getModelQueryPrefix", () => {
+		it("should return the correct query prefix for a model that has one", () => {
+			expect(getModelQueryPrefix("ollama", "nomic-embed-code")).toBe(
+				"Represent this query for searching relevant code: ",
+			)
+		})
+
+		it("should be case-insensitive for model IDs", () => {
+			// Test with different case variations
+			expect(getModelQueryPrefix("ollama", "NOMIC-EMBED-CODE")).toBe(
+				"Represent this query for searching relevant code: ",
+			)
+			expect(getModelQueryPrefix("ollama", "Nomic-Embed-Code")).toBe(
+				"Represent this query for searching relevant code: ",
+			)
+			expect(getModelQueryPrefix("openai-compatible", "NOMIC-EMBED-CODE")).toBe(
+				"Represent this query for searching relevant code: ",
+			)
+		})
+
+		it("should return undefined for model without query prefix", () => {
+			expect(getModelQueryPrefix("openai", "text-embedding-3-small")).toBeUndefined()
+			expect(getModelQueryPrefix("gemini", "text-embedding-004")).toBeUndefined()
+		})
+
+		it("should return undefined for non-existent model", () => {
+			expect(getModelQueryPrefix("ollama", "non-existent-model")).toBeUndefined()
+		})
+
+		it("should return undefined for non-existent provider", () => {
+			// @ts-expect-error Testing with invalid provider
+			expect(getModelQueryPrefix("non-existent-provider", "nomic-embed-code")).toBeUndefined()
+		})
+	})
+
+	describe("getDefaultModelId", () => {
+		it("should return the correct default model for each provider", () => {
+			expect(getDefaultModelId("openai")).toBe("text-embedding-3-small")
+			expect(getDefaultModelId("openai-compatible")).toBe("text-embedding-3-small")
+			expect(getDefaultModelId("gemini")).toBe("gemini-embedding-001")
+			expect(getDefaultModelId("mistral")).toBe("codestral-embed-2505")
+			expect(getDefaultModelId("vercel-ai-gateway")).toBe("openai/text-embedding-3-large")
+			expect(getDefaultModelId("openrouter")).toBe("openai/text-embedding-3-large")
+		})
+
+		it("should return a default for Ollama", () => {
+			const defaultModel = getDefaultModelId("ollama")
+			expect(defaultModel).toBeDefined()
+			expect(EMBEDDING_MODEL_PROFILES.ollama?.[defaultModel]).toBeDefined()
+		})
+
+		it("should return fallback for unknown provider", () => {
+			// @ts-expect-error Testing with invalid provider
+			expect(getDefaultModelId("unknown-provider")).toBe("text-embedding-3-small")
+		})
+	})
+
+	describe("Qwen model specific tests", () => {
+		it("should handle Qwen model with original casing", () => {
+			expect(getModelDimension("openrouter", "qwen/qwen3-embedding-8b")).toBe(4096)
+			expect(getModelScoreThreshold("openrouter", "qwen/qwen3-embedding-8b")).toBe(0.4)
+		})
+
+		it("should handle Qwen model with user's casing from issue", () => {
+			// This is the exact casing from the user's issue
+			expect(getModelDimension("openrouter", "Qwen/Qwen3-Embedding-8B")).toBe(4096)
+			expect(getModelScoreThreshold("openrouter", "Qwen/Qwen3-Embedding-8B")).toBe(0.4)
+		})
+
+		it("should handle Qwen model with all uppercase", () => {
+			expect(getModelDimension("openrouter", "QWEN/QWEN3-EMBEDDING-8B")).toBe(4096)
+			expect(getModelScoreThreshold("openrouter", "QWEN/QWEN3-EMBEDDING-8B")).toBe(0.4)
+		})
+
+		it("should handle Qwen model with random casing", () => {
+			expect(getModelDimension("openrouter", "qWeN/QwEn3-EmBeDdInG-8b")).toBe(4096)
+			expect(getModelScoreThreshold("openrouter", "qWeN/QwEn3-EmBeDdInG-8b")).toBe(0.4)
+		})
+	})
+})

src/shared/embeddingModels.ts

@@ -105,14 +105,19 @@ export function getModelDimension(provider: EmbedderProvider, modelId: string):
 		return undefined
 	}
 
-	const modelProfile = providerProfiles[modelId]
+	// Convert modelId to lowercase for case-insensitive comparison
+	const lowerModelId = modelId.toLowerCase()
+
+	// Find the model profile with case-insensitive matching
+	const modelProfile = Object.keys(providerProfiles).find((key) => key.toLowerCase() === lowerModelId)
+
 	if (!modelProfile) {
 		// Don't warn here, as it might be a custom model ID not in our profiles
 		// console.warn(`Model not found for provider ${provider}: ${modelId}`)
 		return undefined // Or potentially return a default/fallback dimension?
 	}
 
-	return modelProfile.dimension
+	return providerProfiles[modelProfile].dimension
 }
 
 /**
@@ -127,8 +132,17 @@ export function getModelScoreThreshold(provider: EmbedderProvider, modelId: stri
 		return undefined
 	}
 
-	const modelProfile = providerProfiles[modelId]
-	return modelProfile?.scoreThreshold
+	// Convert modelId to lowercase for case-insensitive comparison
+	const lowerModelId = modelId.toLowerCase()
+
+	// Find the model profile with case-insensitive matching
+	const modelProfileKey = Object.keys(providerProfiles).find((key) => key.toLowerCase() === lowerModelId)
+
+	if (!modelProfileKey) {
+		return undefined
+	}
+
+	return providerProfiles[modelProfileKey]?.scoreThreshold
 }
 
 /**
@@ -143,8 +157,17 @@ export function getModelQueryPrefix(provider: EmbedderProvider, modelId: string)
 		return undefined
 	}
 
-	const modelProfile = providerProfiles[modelId]
-	return modelProfile?.queryPrefix
+	// Convert modelId to lowercase for case-insensitive comparison
+	const lowerModelId = modelId.toLowerCase()
+
+	// Find the model profile with case-insensitive matching
+	const modelProfileKey = Object.keys(providerProfiles).find((key) => key.toLowerCase() === lowerModelId)
+
+	if (!modelProfileKey) {
+		return undefined
+	}
+
+	return providerProfiles[modelProfileKey]?.queryPrefix
 }
 
 /**