Wake agents on @mention in chat messages

Agents were deaf to @mentions — only /agent slash commands triggered a
task_run. Now ChatService.sendMessage auto-wakes every mentioned agent
(skipping self-mentions and /agent which already handles it) by creating
a queued task_run through ChatAgentWakeService.wakeFromMention.

AgentCompany-New/src/main/services/chat-agent-wake-service.ts

@@ -35,6 +35,27 @@ export class ChatAgentWakeService {
     this.organization = new OrganizationService(db);
   }
 
+  wakeFromMention(input: SendMessageInput, agentId: string, messageId: string, threadId: string, now: string): AgentWakeResult {
+    const agent = this.requireRunnableAgent(input.orgId, agentId);
+    const workspace = this.workspaceForAgent(input.orgId, agent.workspace_id);
+    const taskId = this.organization.createTask({
+      orgId: input.orgId,
+      title: `Chat reply: ${agent.name}`,
+      description: this.mentionTaskDescription(input, messageId, threadId),
+      status: TASK_STATUS.BACKLOG,
+      assigneeAgentId: agent.id,
+      risk: RISK_LEVEL.LOW,
+      projectId: workspace?.project_id ?? null,
+      goalId: workspace?.goal_id ?? null,
+      workspaceId: workspace?.id ?? null,
+      priority: TASK_PRIORITY.HIGH,
+      requiresFilesystem: false,
+    });
+    const runId = this.createQueuedRun({ orgId: input.orgId, taskId, agent, workspace, messageId, threadId, now });
+    this.recordPresence(agent.id, { command: "mention", args: "" }, now);
+    return { targetId: agent.id, taskId, runId };
+  }
+
   wakeFromSlash(input: SendMessageInput, mentions: ResolvedMention[], slash: SlashInvocation, messageId: string, threadId: string, now: string): AgentWakeResult {
     const targetId = this.requireAgentMention(mentions);
     const agent = this.requireRunnableAgent(input.orgId, targetId);
@@ -170,6 +191,17 @@ export class ChatAgentWakeService {
     return `Chat mention: ${title.length > 64 ? `${title.slice(0, 61)}...` : title}`;
   }
 
+  private mentionTaskDescription(input: SendMessageInput, messageId: string, threadId: string): string {
+    return [
+      `Source message: ${messageId}`,
+      `Source thread: ${threadId}`,
+      `Source space: ${input.spaceId}`,
+      `Sender: ${input.senderType}${input.senderId ? `:${input.senderId}` : ""}`,
+      "",
+      "You were @mentioned in a chat message. Read the thread context, then reply in the source thread with send_message and pass the thread_id above.",
+    ].join("\n");
+  }
+
   private taskDescription(input: SendMessageInput, slash: SlashInvocation, messageId: string, threadId: string): string {
     return [
       `Chat command: /agent ${slash.args.trim()}`,

AgentCompany-New/src/main/services/chat-service.ts

@@ -138,6 +138,9 @@ export class ChatService {
     recordChatMentions(this.db, id, mentions);
     const slashResultRef = slash ? this.executeSlashCommand(input, space, sender, mentions, attachments, slash, id, threadId, now) : null;
     if (slash) this.recordSlashInvocation(id, slash, slashResultRef, now);
+    if (!slash || slash.command !== "agent") {
+      this.wakeAgentMentions(input, mentions, id, threadId, now);
+    }
     this.handoffs.record({
       orgId: input.orgId,
       spaceId: input.spaceId,
@@ -358,6 +361,19 @@ export class ChatService {
     `).run(createId("slash"), messageId, slash.command, JSON.stringify({ raw: slash.args }), resultRef, now);
   }
 
+  private wakeAgentMentions(input: SendMessageInput, mentions: ResolvedMention[], messageId: string, threadId: string, now: string): void {
+    const agentMentions = mentions.filter(
+      (m) => m.target.type === "agent" && !(input.senderType === "agent" && input.senderId === m.target.id),
+    );
+    for (const mention of agentMentions) {
+      try {
+        this.agentWake.wakeFromMention(input, mention.target.id, messageId, threadId, now);
+      } catch {
+        // Agent may lack an enabled provider or service identity; skip silently.
+      }
+    }
+  }
+
   private requireSpace(orgId: string, spaceId: string): SpaceRow {
     const space = this.db.prepare("select id, org_id, visibility, space_type from chat_spaces where id = ? and org_id = ?")
       .get(spaceId, orgId) as SpaceRow | undefined;