normalize anthropic model string when resolving prompt to support 4.5 models (#1806)

Author: bhavyaus

src/extension/prompts/node/agent/anthropicPrompts.tsx

@@ -211,9 +211,9 @@ class AnthropicPromptResolver implements IAgentPrompt {
 	static readonly familyPrefixes = ['claude', 'Anthropic'];
 
 	resolvePrompt(endpoint: IChatEndpoint): PromptConstructor | undefined {
-
-		if (endpoint.model?.startsWith('claude-sonnet-4.5') ||
-			endpoint.model?.startsWith('claude-haiku-4.5')) {
+		const normalizedModel = endpoint.model?.replace(/\./g, '-');
+		if (normalizedModel?.startsWith('claude-sonnet-4-5') ||
+			normalizedModel?.startsWith('claude-haiku-4-5')) {
 			return Claude45DefaultPrompt;
 		}
 		return DefaultAnthropicAgentPrompt;