fix: support UUID lookup in find_library_agent tool

When users paste a library URL or agent UUID, the find_library_agent
tool now does direct ID lookup first (both by graph_id and library
agent ID) before falling back to text search.

This fixes the issue where searching by UUID would fail because
it was only doing text matching on agent names/descriptions.

autogpt_platform/backend/backend/api/features/chat/tools/agent_search.py

@@ -1,6 +1,7 @@
 """Shared agent search functionality for find_agent and find_library_agent tools."""
 
 import logging
+import re
 from typing import Literal
 
 from backend.api.features.library import db as library_db
@@ -19,6 +20,78 @@ logger = logging.getLogger(__name__)
 
 SearchSource = Literal["marketplace", "library"]
 
+# UUID v4 pattern for direct agent ID lookup
+_UUID_PATTERN = re.compile(
+    r"^[a-f0-9]{8}-[a-f0-9]{4}-4[a-f0-9]{3}-[89ab][a-f0-9]{3}-[a-f0-9]{12}$",
+    re.IGNORECASE,
+)
+
+
+def _is_uuid(text: str) -> bool:
+    """Check if text is a valid UUID v4."""
+    return bool(_UUID_PATTERN.match(text.strip()))
+
+
+async def _get_library_agent_by_id(user_id: str, agent_id: str) -> AgentInfo | None:
+    """Fetch a library agent by ID (library agent ID or graph_id).
+
+    Tries multiple lookup strategies:
+    1. First by graph_id (AgentGraph primary key)
+    2. Then by library agent ID (LibraryAgent primary key)
+
+    Args:
+        user_id: The user ID
+        agent_id: The ID to look up (can be graph_id or library agent ID)
+
+    Returns:
+        AgentInfo if found, None otherwise
+    """
+    # Try 1: Look up by graph_id
+    try:
+        agent = await library_db.get_library_agent_by_graph_id(user_id, agent_id)
+        if agent:
+            logger.debug(f"Found library agent by graph_id: {agent.name}")
+            return AgentInfo(
+                id=agent.id,
+                name=agent.name,
+                description=agent.description or "",
+                source="library",
+                in_library=True,
+                creator=agent.creator_name,
+                status=agent.status.value,
+                can_access_graph=agent.can_access_graph,
+                has_external_trigger=agent.has_external_trigger,
+                new_output=agent.new_output,
+                graph_id=agent.graph_id,
+            )
+    except Exception as e:
+        logger.debug(f"Could not fetch library agent by graph_id {agent_id}: {e}")
+
+    # Try 2: Look up by library agent ID (primary key)
+    try:
+        agent = await library_db.get_library_agent(agent_id, user_id)
+        if agent:
+            logger.debug(f"Found library agent by library_id: {agent.name}")
+            return AgentInfo(
+                id=agent.id,
+                name=agent.name,
+                description=agent.description or "",
+                source="library",
+                in_library=True,
+                creator=agent.creator_name,
+                status=agent.status.value,
+                can_access_graph=agent.can_access_graph,
+                has_external_trigger=agent.has_external_trigger,
+                new_output=agent.new_output,
+                graph_id=agent.graph_id,
+            )
+    except NotFoundError:
+        logger.debug(f"Library agent not found by library_id: {agent_id}")
+    except Exception as e:
+        logger.debug(f"Could not fetch library agent by library_id {agent_id}: {e}")
+
+    return None
+
 
 async def search_agents(
     query: str,
@@ -70,28 +143,38 @@ async def search_agents(
                     )
                 )
         else:  # library
-            logger.info(f"Searching user library for: {query}")
-            results = await library_db.list_library_agents(
-                user_id=user_id,  # type: ignore[arg-type]
-                search_term=query,
-                page_size=10,
-            )
-            for agent in results.agents:
-                agents.append(
-                    AgentInfo(
-                        id=agent.id,
-                        name=agent.name,
-                        description=agent.description or "",
-                        source="library",
-                        in_library=True,
-                        creator=agent.creator_name,
-                        status=agent.status.value,
-                        can_access_graph=agent.can_access_graph,
-                        has_external_trigger=agent.has_external_trigger,
-                        new_output=agent.new_output,
-                        graph_id=agent.graph_id,
-                    )
+            # If query looks like a UUID, try direct lookup first
+            if _is_uuid(query):
+                logger.info(f"Query looks like UUID, trying direct lookup: {query}")
+                agent = await _get_library_agent_by_id(user_id, query)  # type: ignore[arg-type]
+                if agent:
+                    agents.append(agent)
+                    logger.info(f"Found agent by direct ID lookup: {agent.name}")
+
+            # If no results from UUID lookup, do text search
+            if not agents:
+                logger.info(f"Searching user library for: {query}")
+                results = await library_db.list_library_agents(
+                    user_id=user_id,  # type: ignore[arg-type]
+                    search_term=query,
+                    page_size=10,
                 )
+                for agent in results.agents:
+                    agents.append(
+                        AgentInfo(
+                            id=agent.id,
+                            name=agent.name,
+                            description=agent.description or "",
+                            source="library",
+                            in_library=True,
+                            creator=agent.creator_name,
+                            status=agent.status.value,
+                            can_access_graph=agent.can_access_graph,
+                            has_external_trigger=agent.has_external_trigger,
+                            new_output=agent.new_output,
+                            graph_id=agent.graph_id,
+                        )
+                    )
         logger.info(f"Found {len(agents)} agents in {source}")
     except NotFoundError:
         pass