feat: vertex/gemini prompt caching (RooCodeInc#2996)

Author: ashktn

.changeset/curly-frogs-pull.md

@@ -0,0 +1,5 @@
+---
+"roo-cline": patch
+---
+
+Use gemini provider when using Gemini on vertex ai

package-lock.json

@@ -404,7 +404,6 @@
 		"@anthropic-ai/sdk": "^0.37.0",
 		"@anthropic-ai/vertex-sdk": "^0.7.0",
 		"@aws-sdk/client-bedrock-runtime": "^3.779.0",
-		"@google-cloud/vertexai": "^1.9.3",
 		"@google/genai": "^0.9.0",
 		"@mistralai/mistralai": "^1.3.6",
 		"@modelcontextprotocol/sdk": "^1.7.0",

package.json

@@ -8,6 +8,7 @@ import { AnthropicHandler } from "./providers/anthropic"
 import { AwsBedrockHandler } from "./providers/bedrock"
 import { OpenRouterHandler } from "./providers/openrouter"
 import { VertexHandler } from "./providers/vertex"
+import { AnthropicVertexHandler } from "./providers/anthropic-vertex"
 import { OpenAiHandler } from "./providers/openai"
 import { OllamaHandler } from "./providers/ollama"
 import { LmStudioHandler } from "./providers/lmstudio"
@@ -45,6 +46,7 @@ export interface ApiHandler {
 
 export function buildApiHandler(configuration: ApiConfiguration): ApiHandler {
 	const { apiProvider, ...options } = configuration
+
 	switch (apiProvider) {
 		case "anthropic":
 			return new AnthropicHandler(options)
@@ -55,7 +57,11 @@ export function buildApiHandler(configuration: ApiConfiguration): ApiHandler {
 		case "bedrock":
 			return new AwsBedrockHandler(options)
 		case "vertex":
-			return new VertexHandler(options)
+			if (options.apiModelId?.startsWith("claude")) {
+				return new AnthropicVertexHandler(options)
+			} else {
+				return new VertexHandler(options)
+			}
 		case "openai":
 			return new OpenAiHandler(options)
 		case "ollama":