Update prune context instructions to include tests and type definitions in file search

Author: robertpiosik

packages/vscode/src/constants/instructions.ts

@@ -29,9 +29,9 @@ export const intelligent_update_instructions =
 export const commit_message_instructions =
   "Write a brief and precise summary for the changes, limited to a single sentence, if possible and nothing else. Because the summary will be used for a commit message, don't use any markdown formatting. Use an imperative tone to ensure clarity and focus on the primary change or purpose."
 
-export const prune_context_instructions = `Find relevant files for the task.
+export const prune_context_instructions = `Find all files building modules the task touches (including tests, type definitions, etc.).
 <system>
-Your response must begin with "**Relevant files:**", then list paths relevant for the task one under another. Don't send anything else. Example:
+Your response must begin with "**Relevant files:**", then list paths one under another. Don't send anything else. Example:
 
 **Relevant files:**