docs: add task for agent prompt generation

TASKS.md

@@ -40,7 +40,7 @@ Acceptance Criteria:
 
 ## TASK-003 — Improve discovery workflow
 
-Status: Todo
+Status: Done
 
 Goal:
 Improve `rdb discover` so it records structured answers into the discovery ledger.
@@ -60,3 +60,15 @@ Acceptance Criteria:
 - Preserve existing discovery history
 - Add/update tests
 - Update RUN_LOG.md
+
+## TASK-004 — Implement ask-more command
+
+Status: Todo
+
+Goal: Add a command that finds weak answers and asks deeper follow-up questions.
+
+Acceptance Criteria:
+
+- command reads discovery-log.md
+- low-confidence answers are detected
+- follow-up answers are appended to discovery-log.md