fix(agent-usage-reminder): skip reminders for non-orchestrator subagents

src/hooks/agent-usage-reminder/hook.ts

@@ -6,6 +6,8 @@ import {
 } from "./storage";
 import { TARGET_TOOLS, AGENT_TOOLS, REMINDER_MESSAGE } from "./constants";
 import type { AgentUsageState } from "./types";
+import { getSessionAgent } from "../../features/claude-code-session-state";
+import { getAgentConfigKey } from "../../shared/agent-display-names";
 
 interface ToolExecuteInput {
   tool: string;
@@ -26,6 +28,23 @@ interface EventInput {
   };
 }
 
+/**
+ * Only orchestrator agents should receive usage reminders.
+ * Subagents (explore, librarian, oracle, etc.) are the targets of delegation,
+ * so reminding them to delegate to themselves is counterproductive.
+ */
+const ORCHESTRATOR_AGENTS = new Set([
+  "sisyphus",
+  "sisyphus-junior",
+  "atlas",
+  "hephaestus",
+  "prometheus",
+]);
+
+function isOrchestratorAgent(agentName: string): boolean {
+  return ORCHESTRATOR_AGENTS.has(getAgentConfigKey(agentName));
+}
+
 export function createAgentUsageReminderHook(_ctx: PluginInput) {
   const sessionStates = new Map<string, AgentUsageState>();
 
@@ -60,6 +79,12 @@ export function createAgentUsageReminderHook(_ctx: PluginInput) {
     output: ToolExecuteOutput,
   ) => {
     const { tool, sessionID } = input;
+
+    const agent = getSessionAgent(sessionID);
+    if (agent && !isOrchestratorAgent(agent)) {
+      return;
+    }
+
     const toolLower = tool.toLowerCase();
 
     if (AGENT_TOOLS.has(toolLower)) {