refactor(agent): require complete send options

packages/ui/acp/src/index.ts

@@ -1092,7 +1092,7 @@ export function apply(ctx: Context, config: AcpConfig): void {
           if (additionalContext !== undefined) {
             rec.agent.inject(additionalContext.content, { source: additionalContext.source })
           }
-          rec.agent.send(preparedContent, { source: { kind: 'user' } })
+          rec.agent.followup(preparedContent, { source: { kind: 'user' } })
         })
         return { stopReason }
       },

packages/ui/tui/src/index.ts

@@ -2507,7 +2507,7 @@ export function createTuiChat(
     } else if (agent.status === 'running') {
       agent.steer(content, { source: { kind: 'user' } })
     } else {
-      agent.send(content, { source: { kind: 'user' } })
+      agent.followup(content, { source: { kind: 'user' } })
     }
   }