fix: Address Copilot review comments

1. Move sessionTokens Map inside createPresenceManager to avoid
   cross-account collisions (now scoped per-account)

2. Add NOTE explaining that usage stats aren't available in the
   message_sent hook currently - this would require threading usage
   data through the entire reply pipeline (follow-up work)

src/auto-reply/reply/dispatch-from-config.ts

@@ -333,6 +333,12 @@ export async function dispatchReplyFromConfig(params: {
     counts.final += routedFinalCount;
 
     // Trigger message_sent hook for final replies
+    // NOTE: Usage stats (tokens, model, etc.) are not currently available here.
+    // They are computed in agent-runner.ts but not returned through the reply pipeline.
+    // To enable full usage tracking, getReplyFromConfig/replyResolver would need to
+    // return usage data alongside the reply text. For now, hooks receive the message
+    // content without usage stats - presence managers can track cumulative tokens
+    // via other means (e.g., diagnostic events or session metadata).
     if (hookRunner?.hasHooks("message_sent") && replies.length > 0) {
       const targetSessionKey =
         ctx.CommandSource === "native" ? ctx.CommandTargetSessionKey?.trim() : undefined;

src/discord/monitor/presence-manager.ts

@@ -38,9 +38,6 @@ const ACTIVITY_TYPE_MAP: Record<string, number> = {
   Competing: 5, // "Competing in {name}"
 };
 
-// Track cumulative tokens per session
-const sessionTokens = new Map<string, number>();
-
 /**
  * Create a presence manager for a Discord gateway
  */
@@ -51,6 +48,9 @@ export function createPresenceManager(params: {
 }) {
   const { gateway, config, accountId } = params;
 
+  // Track cumulative tokens per session (scoped per-account to avoid cross-account collisions)
+  const sessionTokens = new Map<string, number>();
+
   const defaultFormat = config.showTokenUsage ? "📊 {tokens} tokens" : "";
   const format = config.format ?? defaultFormat;
   // Default to "Watching" as it reads well: "Watching 📊 1,234 tokens"