feat: add get_my_profile tool and max iterations limit

- Create builtin-tools.ts with get_my_profile tool that returns the
  logged-in user's Nostr profile metadata
- Add MAX_TOOL_ITERATIONS (10) to prevent infinite agentic loops
- Auto-register builtin tools on session manager import

https://claude.ai/code/session_01HqtD9R33oqfB14Gu1V5wHC

src/services/llm/builtin-tools.ts

@@ -0,0 +1,110 @@
+/**
+ * Built-in Tools for AI Chat
+ *
+ * These tools are automatically registered with the tool registry.
+ */
+
+import { firstValueFrom, filter, timeout, catchError, of } from "rxjs";
+import { getProfileContent } from "applesauce-core/helpers";
+import accounts from "@/services/accounts";
+import eventStore from "@/services/event-store";
+import { toolRegistry, type Tool } from "./tools";
+
+// ─────────────────────────────────────────────────────────────
+// get_my_profile - Returns the logged-in user's profile
+// ─────────────────────────────────────────────────────────────
+
+const getMyProfileTool: Tool = {
+  name: "get_my_profile",
+  description:
+    "Get the profile information of the currently logged-in user. Returns their display name, about, picture, and other metadata. Returns an error if no user is logged in.",
+  parameters: {
+    type: "object",
+    properties: {},
+    required: [],
+  },
+  async execute(_args, _context) {
+    // Get the active account
+    const account = accounts.active$.getValue();
+
+    if (!account) {
+      return {
+        success: false,
+        content: "",
+        error: "No user is currently logged in",
+      };
+    }
+
+    const pubkey = account.pubkey;
+
+    try {
+      // Try to get the profile from the event store
+      const profileEvent = await firstValueFrom(
+        eventStore.replaceable(0, pubkey).pipe(
+          filter((event) => event !== undefined),
+          timeout(5000),
+          catchError(() => of(undefined)),
+        ),
+      );
+
+      if (!profileEvent) {
+        return {
+          success: true,
+          content: JSON.stringify({
+            pubkey,
+            profile: null,
+            message: "User is logged in but no profile metadata found",
+          }),
+        };
+      }
+
+      const profile = getProfileContent(profileEvent);
+
+      if (!profile) {
+        return {
+          success: true,
+          content: JSON.stringify({
+            pubkey,
+            profile: null,
+            message:
+              "User is logged in but profile metadata could not be parsed",
+          }),
+        };
+      }
+
+      return {
+        success: true,
+        content: JSON.stringify({
+          pubkey,
+          profile: {
+            name: profile.name,
+            display_name: profile.display_name,
+            about: profile.about,
+            picture: profile.picture,
+            banner: profile.banner,
+            website: profile.website,
+            nip05: profile.nip05,
+            lud16: profile.lud16,
+          },
+        }),
+      };
+    } catch (error) {
+      return {
+        success: false,
+        content: "",
+        error: `Failed to fetch profile: ${error instanceof Error ? error.message : "Unknown error"}`,
+      };
+    }
+  },
+};
+
+// ─────────────────────────────────────────────────────────────
+// Register all built-in tools
+// ─────────────────────────────────────────────────────────────
+
+export function registerBuiltinTools(): void {
+  toolRegistry.register(getMyProfileTool);
+}
+
+// Auto-register on import
+registerBuiltinTools();

src/services/llm/session-manager.ts

@@ -14,6 +14,7 @@ import { BehaviorSubject, Subject } from "rxjs";
 import db from "@/services/db";
 import { providerManager } from "./provider-manager";
 import { toolRegistry, executeToolCalls, type ToolContext } from "./tools";
+import "@/services/llm/builtin-tools"; // Register built-in tools
 import type {
   ChatSessionState,
   StreamingUpdateEvent,
@@ -31,6 +32,9 @@ import type {
 // Session cleanup delay (ms) - wait before cleaning up after last subscriber leaves
 const CLEANUP_DELAY = 5000;
 
+// Maximum tool execution iterations to prevent infinite loops
+const MAX_TOOL_ITERATIONS = 10;
+
 class ChatSessionManager {
   // ─────────────────────────────────────────────────────────────
   // Reactive State
@@ -340,8 +344,19 @@ class ChatSessionManager {
       // Agentic loop - continue until we get a final response
       let continueLoop = true;
       let totalCost = 0;
+      let iterations = 0;
 
       while (continueLoop) {
+        iterations++;
+
+        // Safety check: prevent infinite loops
+        if (iterations > MAX_TOOL_ITERATIONS) {
+          console.warn(
+            `[SessionManager] Max tool iterations (${MAX_TOOL_ITERATIONS}) reached for conversation ${conversationId}`,
+          );
+          break;
+        }
+
         // Check if aborted
         if (abortController.signal.aborted) {
           throw new DOMException("Aborted", "AbortError");