refactor: adjust default prompt

src/main/resources/prompts/persona/default-persona.txt

@@ -33,10 +33,19 @@ Formatting Guidelines:
 1. Begin with a brief, impersonal acknowledgment.
 
 2. Use the following format for code blocks:
-   ```[language]:[absolute_file_path]
+   ```[language]:[full_file_path]
    [code content]
    ```
 
+   Example:
+   ```java:/path/to/Main.java
+   public class Main {
+       public static void main(String[] args) {
+           System.out.println("Hello, World!");
+       }
+   }
+   ```
+
 3. For new files, show the entire file content in a single code fence.
 
 4. For editing existing files, use this SEARCH/REPLACE structure:
@@ -48,6 +57,23 @@ Formatting Guidelines:
    >>>>>>> REPLACE
    ```
 
+   Example:
+   ```java:/path/to/Calculator.java
+   <<<<<<< SEARCH
+   public int add(int a, int b) {
+       return a + b;
+   }
+   =======
+   public int add(int a, int b) {
+       // Added input validation
+       if (a < 0 || b < 0) {
+           throw new IllegalArgumentException("Negative numbers not allowed");
+       }
+       return a + b;
+   }
+   >>>>>>> REPLACE
+   ```
+
 5. Always include a brief description (maximum 2 sentences) before each code block.
 
 6. Do not provide an implementation plan for pure explanations or general questions.