diff --git a/src/auto-reply/reply/agent-runner-execution.ts b/src/auto-reply/reply/agent-runner-execution.ts
index b580dcc4bc..d1f0e276d6 100644
--- a/src/auto-reply/reply/agent-runner-execution.ts
+++ b/src/auto-reply/reply/agent-runner-execution.ts
@@ -127,9 +127,6 @@ export async function runAgentTurnWithFallback(params: {
         run: (provider, model) => {
           // Notify that model selection is complete (including after fallback).
           // This allows responsePrefix template interpolation with the actual model.
-          logVerbose(
-            `[prefix-debug] onModelSelected firing: provider=${provider} model=${model} thinkLevel=${params.followupRun.run.thinkLevel}`,
-          );
           params.opts?.onModelSelected?.({
             provider,
             model,
diff --git a/src/auto-reply/reply/reply-dispatcher.ts b/src/auto-reply/reply/reply-dispatcher.ts
index 4a45161d8f..b8eeca4777 100644
--- a/src/auto-reply/reply/reply-dispatcher.ts
+++ b/src/auto-reply/reply/reply-dispatcher.ts
@@ -75,14 +75,6 @@ function normalizeReplyPayloadInternal(
   // Prefer dynamic context provider over static context
   const prefixContext = opts.responsePrefixContextProvider?.() ?? opts.responsePrefixContext;
 
-  // Debug logging for prefix template resolution
-  if (opts.responsePrefix?.includes("{")) {
-    // eslint-disable-next-line no-console
-    console.log(
-      `[prefix-debug] normalizing with context: ${JSON.stringify(prefixContext)} prefix: ${opts.responsePrefix}`,
-    );
-  }
-
   return normalizeReplyPayload(payload, {
     responsePrefix: opts.responsePrefix,
     responsePrefixContext: prefixContext,
diff --git a/src/discord/monitor/message-handler.process.ts b/src/discord/monitor/message-handler.process.ts
index 4758feb092..dae301d04c 100644
--- a/src/discord/monitor/message-handler.process.ts
+++ b/src/discord/monitor/message-handler.process.ts
@@ -329,13 +329,11 @@ export async function processDiscordMessage(ctx: DiscordMessagePreflightContext)
           ? !discordConfig.blockStreaming
           : undefined,
       onModelSelected: (ctx) => {
-        prefixContext = {
-          ...prefixContext,
-          provider: ctx.provider,
-          model: extractShortModelName(ctx.model),
-          modelFull: `${ctx.provider}/${ctx.model}`,
-          thinkingLevel: ctx.thinkLevel ?? "off",
-        };
+        // Mutate the object directly instead of reassigning to ensure the closure sees updates
+        prefixContext.provider = ctx.provider;
+        prefixContext.model = extractShortModelName(ctx.model);
+        prefixContext.modelFull = `${ctx.provider}/${ctx.model}`;
+        prefixContext.thinkingLevel = ctx.thinkLevel ?? "off";
       },
     },
   });
diff --git a/src/imessage/monitor/monitor-provider.ts b/src/imessage/monitor/monitor-provider.ts
index b8a4084199..1d86ec993f 100644
--- a/src/imessage/monitor/monitor-provider.ts
+++ b/src/imessage/monitor/monitor-provider.ts
@@ -386,13 +386,11 @@ export async function monitorIMessageProvider(opts: MonitorIMessageOpts = {}): P
             ? !accountInfo.config.blockStreaming
             : undefined,
         onModelSelected: (ctx) => {
-          prefixContext = {
-            ...prefixContext,
-            provider: ctx.provider,
-            model: extractShortModelName(ctx.model),
-            modelFull: `${ctx.provider}/${ctx.model}`,
-            thinkingLevel: ctx.thinkLevel ?? "off",
-          };
+          // Mutate the object directly instead of reassigning to ensure the closure sees updates
+          prefixContext.provider = ctx.provider;
+          prefixContext.model = extractShortModelName(ctx.model);
+          prefixContext.modelFull = `${ctx.provider}/${ctx.model}`;
+          prefixContext.thinkingLevel = ctx.thinkLevel ?? "off";
         },
       },
     });
diff --git a/src/signal/monitor/event-handler.ts b/src/signal/monitor/event-handler.ts
index 7f093a3c15..0aac7c97bd 100644
--- a/src/signal/monitor/event-handler.ts
+++ b/src/signal/monitor/event-handler.ts
@@ -354,13 +354,11 @@ export function createSignalEventHandler(deps: SignalEventHandlerDeps) {
         disableBlockStreaming:
           typeof deps.blockStreaming === "boolean" ? !deps.blockStreaming : undefined,
         onModelSelected: (ctx) => {
-          prefixContext = {
-            ...prefixContext,
-            provider: ctx.provider,
-            model: extractShortModelName(ctx.model),
-            modelFull: `${ctx.provider}/${ctx.model}`,
-            thinkingLevel: ctx.thinkLevel ?? "off",
-          };
+          // Mutate the object directly instead of reassigning to ensure the closure sees updates
+          prefixContext.provider = ctx.provider;
+          prefixContext.model = extractShortModelName(ctx.model);
+          prefixContext.modelFull = `${ctx.provider}/${ctx.model}`;
+          prefixContext.thinkingLevel = ctx.thinkLevel ?? "off";
         },
       },
     });
diff --git a/src/slack/monitor/message-handler/dispatch.ts b/src/slack/monitor/message-handler/dispatch.ts
index 836e85d46d..fb0eb66b1b 100644
--- a/src/slack/monitor/message-handler/dispatch.ts
+++ b/src/slack/monitor/message-handler/dispatch.ts
@@ -117,13 +117,11 @@ export async function dispatchPreparedSlackMessage(prepared: PreparedSlackMessag
           ? !account.config.blockStreaming
           : undefined,
       onModelSelected: (ctx) => {
-        prefixContext = {
-          ...prefixContext,
-          provider: ctx.provider,
-          model: extractShortModelName(ctx.model),
-          modelFull: `${ctx.provider}/${ctx.model}`,
-          thinkingLevel: ctx.thinkLevel ?? "off",
-        };
+        // Mutate the object directly instead of reassigning to ensure the closure sees updates
+        prefixContext.provider = ctx.provider;
+        prefixContext.model = extractShortModelName(ctx.model);
+        prefixContext.modelFull = `${ctx.provider}/${ctx.model}`;
+        prefixContext.thinkingLevel = ctx.thinkLevel ?? "off";
       },
     },
   });
diff --git a/src/telegram/bot-message-dispatch.ts b/src/telegram/bot-message-dispatch.ts
index bae515f4b5..c609a07c26 100644
--- a/src/telegram/bot-message-dispatch.ts
+++ b/src/telegram/bot-message-dispatch.ts
@@ -162,13 +162,11 @@ export const dispatchTelegramMessage = async ({
         : undefined,
       disableBlockStreaming,
       onModelSelected: (ctx) => {
-        prefixContext = {
-          ...prefixContext,
-          provider: ctx.provider,
-          model: extractShortModelName(ctx.model),
-          modelFull: `${ctx.provider}/${ctx.model}`,
-          thinkingLevel: ctx.thinkLevel ?? "off",
-        };
+        // Mutate the object directly instead of reassigning to ensure the closure sees updates
+        prefixContext.provider = ctx.provider;
+        prefixContext.model = extractShortModelName(ctx.model);
+        prefixContext.modelFull = `${ctx.provider}/${ctx.model}`;
+        prefixContext.thinkingLevel = ctx.thinkLevel ?? "off";
       },
     },
   });
diff --git a/src/web/auto-reply/monitor/process-message.ts b/src/web/auto-reply/monitor/process-message.ts
index 0a57e68779..205fd5699c 100644
--- a/src/web/auto-reply/monitor/process-message.ts
+++ b/src/web/auto-reply/monitor/process-message.ts
@@ -278,13 +278,11 @@ export async function processMessage(params: {
           ? !params.cfg.channels.whatsapp.blockStreaming
           : undefined,
       onModelSelected: (ctx) => {
-        prefixContext = {
-          ...prefixContext,
-          provider: ctx.provider,
-          model: extractShortModelName(ctx.model),
-          modelFull: `${ctx.provider}/${ctx.model}`,
-          thinkingLevel: ctx.thinkLevel ?? "off",
-        };
+        // Mutate the object directly instead of reassigning to ensure the closure sees updates
+        prefixContext.provider = ctx.provider;
+        prefixContext.model = extractShortModelName(ctx.model);
+        prefixContext.modelFull = `${ctx.provider}/${ctx.model}`;
+        prefixContext.thinkingLevel = ctx.thinkLevel ?? "off";
       },
     },
   });