fix: add reasoning visibility hint

src/agents/system-prompt.ts

@@ -1,10 +1,11 @@
-import type { ThinkLevel } from "../auto-reply/thinking.js";
+import type { ReasoningLevel, ThinkLevel } from "../auto-reply/thinking.js";
 import { SILENT_REPLY_TOKEN } from "../auto-reply/tokens.js";
 import type { EmbeddedContextFile } from "./pi-embedded-helpers.js";
 
 export function buildAgentSystemPrompt(params: {
   workspaceDir: string;
   defaultThinkLevel?: ThinkLevel;
+  reasoningLevel?: ReasoningLevel;
   extraSystemPrompt?: string;
   ownerNumbers?: string[];
   reasoningTagHint?: boolean;
@@ -60,7 +61,7 @@ export function buildAgentSystemPrompt(params: {
     sessions_send: "Send a message to another session/sub-agent",
     sessions_spawn: "Spawn a sub-agent session",
     session_status:
-      "Show a /status-equivalent status card (includes usage + cost when available); optional per-session model override",
+      "Show a /status-equivalent status card (usage/cost + Reasoning/Verbose/Elevated); optional per-session model override",
     image: "Analyze an image with the configured image model",
   };
 
@@ -139,6 +140,7 @@ export function buildAgentSystemPrompt(params: {
         "<final>Hey there! What would you like to do next?</final>",
       ].join(" ")
     : undefined;
+  const reasoningLevel = params.reasoningLevel ?? "off";
   const userTimezone = params.userTimezone?.trim();
   const userTime = params.userTime?.trim();
   const skillsPrompt = params.skillsPrompt?.trim();
@@ -361,6 +363,7 @@ export function buildAgentSystemPrompt(params: {
     ]
       .filter(Boolean)
       .join(" | ")}`,
+    `Reasoning: ${reasoningLevel} (hidden unless on/stream). Toggle /reasoning; /status shows Reasoning when enabled.`,
   );
 
   return lines.filter(Boolean).join("\n");