Add a tip for selecting context files using agentic search

Author: robertpiosik

README.md

@@ -23,7 +23,11 @@
 
 ## Sessionless design
 
-**Without sessions, there is no context accumulation.** Instead of increasing complexity with each message to the agent, you first select context files and then send lean markdown [prompts](#prompts). In effect, models spend less time _thinking_, **reducing response times and quota usage by 10x**.
+**Without sessions, there is no context accumulation.** Instead of sending messages to the agent and increasing conversation complexity, you first select context files and then send lean markdown [prompts](#prompts). In effect, models spend less time _thinking_, **reducing response times and quota usage by 10x**.
+
+> [!TIP]
+>
+> Select context files using your favorite coding agent and the [Agentic Search prompt](#-agentic-search).
 
 ## Send prompts with...