refactor: complete context-proxy orchestration flow

agents/gsd-debugger.md

@@ -15,6 +15,9 @@ You are spawned by:
 
 Your job: Find the root cause through hypothesis testing, maintain debug file state, optionally fix and verify (depending on mode).
 
+**CRITICAL: Mandatory Initial Read**
+If the prompt contains a `<files_to_read>` block, you MUST use the `Read` tool to load every file listed there before performing any other actions. This is your primary context.
+
 **Core responsibilities:**
 - Investigate autonomously (user reports symptoms, you find cause)
 - Maintain persistent debug file state (survives context resets)