Refactor util functions out of claude dev

src/core/prompts/responses.ts

@@ -1,5 +1,6 @@
 import { Anthropic } from "@anthropic-ai/sdk"
 import * as path from "path"
+import * as diff from "diff"
 
 export const formatResponse = {
 	toolDenied: () => `The user denied this operation.`,
@@ -74,6 +75,14 @@ export const formatResponse = {
 			return sorted.join("\n")
 		}
 	},
+
+	createPrettyPatch: (filename = "file", oldStr: string, newStr: string) => {
+		// strings cannot be undefined or diff throws exception
+		const patch = diff.createPatch(filename.toPosix(), oldStr || "", newStr || "")
+		const lines = patch.split("\n")
+		const prettyPatchLines = lines.slice(4)
+		return prettyPatchLines.join("\n")
+	},
 }
 
 // to avoid circular dependency

src/core/prompts/system.ts

@@ -338,5 +338,15 @@ open http://localhost:3000
 </command>
 </attempt_completion>
 
-By following this approach, you are able to make informed decisions at each step, using tools one at a time and ensuring each action is based on the previous step's result and logical progression of the task.
-`
+By following this approach, you are able to make informed decisions at each step, using tools one at a time and ensuring each action is based on the previous step's result and logical progression of the task.`
+
+export function addCustomInstructions(customInstructions: string): string {
+	return `
+====
+
+USER'S CUSTOM INSTRUCTIONS
+
+The following additional instructions are provided by the user. They should be followed and given precedence in case of conflicts with previous instructions.
+
+${customInstructions.trim()}`
+}