Thinking improvements.

orchestration/orchestrator.py

@@ -832,13 +832,9 @@ async def cmd_reload(session: Session, args: str) -> bool:
     return True
 
 
-@command(["/thinking"], "Show the thinking output from the last response")
+@command(["/thinking"], "Browse thinking output history for this session")
 async def cmd_thinking(session: Session, args: str) -> bool:
-    last = ui.get_last_thinking()
-    if not last:
-        ui.print_system("No thinking output recorded — thinking mode may not be active.")
-    else:
-        ui.print_thinking_expansion(last)
+    await ui.show_thinking_picker()
     return True
 
 
@@ -897,6 +893,11 @@ def _dispatch_command(name: str):
     return None
 
 
+# Register all slash command names for tab completion.
+# This runs once at import time, after all @command decorators have executed.
+ui.set_completions([(name, desc) for names, desc, _ in COMMANDS for name in names])
+
+
 # ---------------------------------------------------------------------------
 # Direct Agent Session
 # Opens an interactive REPL with one named agent.
@@ -920,7 +921,7 @@ async def direct_agent_session(agent_name: str, dry_run: bool = False):
 
     while True:
         try:
-            user_input = ui.get_directive()
+            user_input = await ui.get_directive()
         except (EOFError, KeyboardInterrupt):
             break
 
@@ -928,11 +929,7 @@ async def direct_agent_session(agent_name: str, dry_run: bool = False):
             break
 
         if user_input.lower() == "/thinking":
-            last = ui.get_last_thinking()
-            if not last:
-                ui.print_system("No thinking output recorded — thinking mode may not be active.")
-            else:
-                ui.print_thinking_expansion(last)
+            await ui.show_thinking_picker()
             continue
 
         response = await call_agent_async(agent, user_input, dry_run=dry_run, stream=True)
@@ -955,7 +952,7 @@ async def principal_session(dry_run: bool = False):
 
     while True:
         try:
-            raw = ui.get_directive()
+            raw = await ui.get_directive()
         except (EOFError, KeyboardInterrupt):
             ui.console.print()
             break