fix: slim down token usage

src/planning/session.rs

@@ -18,6 +18,7 @@ pub fn advance(
     let standards_md = toon::read_markdown(&config.standards_file)?;
 
     state.phase = ControllerPhase::Planning;
+    state.clear_stop_reason();
     state.planning_session.transcript.push(PlanningTurn {
         role: "user".to_string(),
         content: latest_user_input.to_string(),
@@ -62,6 +63,7 @@ pub fn advance(
             toon::write_plan(&config.plan_file, &plan)?;
 
             state.phase = ControllerPhase::Executing;
+            state.clear_stop_reason();
             state.goal_revision += 1;
             state.goal_status = crate::model::GoalStatus::InProgress;
             state.replan_required = false;