Refactor CLI Config Manager and Add Provider Model Routes

- Removed deprecated constants and functions from cli-config-manager.ts.
- Introduced new provider model presets in litellm-provider-models.ts for better organization and management of model information.
- Created provider-routes.ts to handle API endpoints for retrieving provider information and models.
- Added integration tests for provider routes to ensure correct functionality and response structure.
- Implemented unit tests for settings persistence functions, covering various scenarios and edge cases.
- Enhanced error handling and validation in the new routes and settings functions.

ccw/src/config/litellm-provider-models.ts

@@ -0,0 +1,222 @@
+/**
+ * Provider Model Presets
+ *
+ * Predefined model information for each supported LLM provider.
+ * Used for UI dropdowns and validation.
+ */
+
+import type { ProviderType } from '../types/litellm-api-config.js';
+
+/**
+ * Model information metadata
+ */
+export interface ModelInfo {
+  /** Model identifier (used in API calls) */
+  id: string;
+
+  /** Human-readable display name */
+  name: string;
+
+  /** Context window size in tokens */
+  contextWindow: number;
+
+  /** Whether this model supports prompt caching */
+  supportsCaching: boolean;
+}
+
+/**
+ * Embedding model information metadata
+ */
+export interface EmbeddingModelInfo {
+  /** Model identifier (used in API calls) */
+  id: string;
+
+  /** Human-readable display name */
+  name: string;
+
+  /** Embedding dimensions */
+  dimensions: number;
+
+  /** Maximum input tokens */
+  maxTokens: number;
+
+  /** Provider identifier */
+  provider: string;
+}
+
+
+/**
+ * Predefined models for each API format
+ * Used for UI selection and validation
+ * Note: Most providers use OpenAI-compatible format
+ */
+export const PROVIDER_MODELS: Record<ProviderType, ModelInfo[]> = {
+  // OpenAI-compatible format (used by OpenAI, DeepSeek, Ollama, etc.)
+  openai: [
+    {
+      id: 'gpt-4o',
+      name: 'GPT-4o',
+      contextWindow: 128000,
+      supportsCaching: true
+    },
+    {
+      id: 'gpt-4o-mini',
+      name: 'GPT-4o Mini',
+      contextWindow: 128000,
+      supportsCaching: true
+    },
+    {
+      id: 'o1',
+      name: 'O1',
+      contextWindow: 200000,
+      supportsCaching: true
+    },
+    {
+      id: 'deepseek-chat',
+      name: 'DeepSeek Chat',
+      contextWindow: 64000,
+      supportsCaching: false
+    },
+    {
+      id: 'deepseek-coder',
+      name: 'DeepSeek Coder',
+      contextWindow: 64000,
+      supportsCaching: false
+    },
+    {
+      id: 'llama3.2',
+      name: 'Llama 3.2',
+      contextWindow: 128000,
+      supportsCaching: false
+    },
+    {
+      id: 'qwen2.5-coder',
+      name: 'Qwen 2.5 Coder',
+      contextWindow: 32000,
+      supportsCaching: false
+    }
+  ],
+
+  // Anthropic format
+  anthropic: [
+    {
+      id: 'claude-sonnet-4-20250514',
+      name: 'Claude Sonnet 4',
+      contextWindow: 200000,
+      supportsCaching: true
+    },
+    {
+      id: 'claude-3-5-sonnet-20241022',
+      name: 'Claude 3.5 Sonnet',
+      contextWindow: 200000,
+      supportsCaching: true
+    },
+    {
+      id: 'claude-3-5-haiku-20241022',
+      name: 'Claude 3.5 Haiku',
+      contextWindow: 200000,
+      supportsCaching: true
+    },
+    {
+      id: 'claude-3-opus-20240229',
+      name: 'Claude 3 Opus',
+      contextWindow: 200000,
+      supportsCaching: false
+    }
+  ],
+
+  // Custom format
+  custom: [
+    {
+      id: 'custom-model',
+      name: 'Custom Model',
+      contextWindow: 128000,
+      supportsCaching: false
+    }
+  ]
+};
+
+/**
+ * Get models for a specific provider
+ * @param providerType - Provider type to get models for
+ * @returns Array of model information
+ */
+export function getModelsForProvider(providerType: ProviderType): ModelInfo[] {
+  return PROVIDER_MODELS[providerType] || [];
+}
+
+/**
+ * Predefined embedding models for each API format
+ * Used for UI selection and validation
+ */
+export const EMBEDDING_MODELS: Record<ProviderType, EmbeddingModelInfo[]> = {
+  // OpenAI embedding models
+  openai: [
+    {
+      id: 'text-embedding-3-small',
+      name: 'Text Embedding 3 Small',
+      dimensions: 1536,
+      maxTokens: 8191,
+      provider: 'openai'
+    },
+    {
+      id: 'text-embedding-3-large',
+      name: 'Text Embedding 3 Large',
+      dimensions: 3072,
+      maxTokens: 8191,
+      provider: 'openai'
+    },
+    {
+      id: 'text-embedding-ada-002',
+      name: 'Ada 002',
+      dimensions: 1536,
+      maxTokens: 8191,
+      provider: 'openai'
+    }
+  ],
+
+  // Anthropic doesn't have embedding models
+  anthropic: [],
+
+  // Custom embedding models
+  custom: [
+    {
+      id: 'custom-embedding',
+      name: 'Custom Embedding',
+      dimensions: 1536,
+      maxTokens: 8192,
+      provider: 'custom'
+    }
+  ]
+};
+
+/**
+ * Get embedding models for a specific provider
+ * @param providerType - Provider type to get embedding models for
+ * @returns Array of embedding model information
+ */
+export function getEmbeddingModelsForProvider(providerType: ProviderType): EmbeddingModelInfo[] {
+  return EMBEDDING_MODELS[providerType] || [];
+}
+
+
+/**
+ * Get model information by ID within a provider
+ * @param providerType - Provider type
+ * @param modelId - Model identifier
+ * @returns Model information or undefined if not found
+ */
+export function getModelInfo(providerType: ProviderType, modelId: string): ModelInfo | undefined {
+  const models = PROVIDER_MODELS[providerType] || [];
+  return models.find(m => m.id === modelId);
+}
+
+/**
+ * Validate if a model ID is supported by a provider
+ * @param providerType - Provider type
+ * @param modelId - Model identifier to validate
+ * @returns true if model is valid for provider
+ */
+export function isValidModel(providerType: ProviderType, modelId: string): boolean {
+  return getModelInfo(providerType, modelId) !== undefined;
+}