diff --git a/backend/src/core/config/initial/init_data.py b/backend/src/core/config/initial/init_data.py
index bc87829..db088f2 100644
--- a/backend/src/core/config/initial/init_data.py
+++ b/backend/src/core/config/initial/init_data.py
@@ -13,6 +13,7 @@ from core.db.session import AsyncSessionLocal
 from core.logging import get_logger
 from models.llm import Llm
 from models.llm_factory import LlmFactory
+from models.user_agent_catalog import UserAgentCatalog
 
 logger = get_logger("core.config.initial.init_data")
 
@@ -33,6 +34,17 @@ class LlmCatalogSeed(BaseModel):
     llms: list[LlmSeed]
 
 
+class UserAgentCatalogSeed(BaseModel):
+    agent_type: str
+    llm_model_code: str
+    status: str
+    config: dict[str, Any]
+
+
+class UserAgentCatalogYaml(BaseModel):
+    agents: list[UserAgentCatalogSeed]
+
+
 def _default_catalog_path() -> Path:
     return (
         Path(__file__).resolve().parents[1] / "static" / "database" / "llm_catalog.yaml"
@@ -62,6 +74,32 @@ def load_llm_catalog(catalog_path: Path | None = None) -> dict[str, Any]:
     return parsed.model_dump()
 
 
+def _default_user_agent_catalog_path() -> Path:
+    return (
+        Path(__file__).resolve().parents[1]
+        / "static"
+        / "database"
+        / "user_agent_catalog.yaml"
+    )
+
+
+def load_user_agent_catalog(catalog_path: Path | None = None) -> dict[str, Any]:
+    path = catalog_path or _default_user_agent_catalog_path()
+    with path.open("r", encoding="utf-8") as file:
+        loaded = yaml.safe_load(file) or {}
+    if not isinstance(loaded, dict):
+        raise ValueError(f"Invalid user agent catalog format: {path}")
+    raw_agents = loaded.get("agents", [])
+    if not isinstance(raw_agents, list):
+        raise ValueError(f"Invalid user agent catalog agents section: {path}")
+    try:
+        parsed = UserAgentCatalogYaml.model_validate({"agents": list(raw_agents)})
+    except ValidationError as exc:
+        raise ValueError(f"Invalid user agent catalog data: {path}") from exc
+
+    return parsed.model_dump()
+
+
 async def _upsert_factory(
     session: AsyncSession,
     *,
@@ -97,8 +135,63 @@ async def _upsert_llm(
     llm.factory_id = factory_id
 
 
-async def initialize_data() -> bool:
-    """Initialize bootstrap data."""
+async def _upsert_user_agent_catalog(
+    session: AsyncSession,
+    *,
+    agent_type: str,
+    llm_id: uuid.UUID,
+    status: str,
+    config: dict[str, Any],
+) -> None:
+    result = await session.execute(
+        select(UserAgentCatalog).where(UserAgentCatalog.agent_type == agent_type)
+    )
+    catalog_entry = result.scalar_one_or_none()
+
+    if catalog_entry is None:
+        session.add(
+            UserAgentCatalog(
+                agent_type=agent_type,
+                llm_id=llm_id,
+                status=status,
+                config=config,
+            )
+        )
+    else:
+        catalog_entry.llm_id = llm_id
+        catalog_entry.status = status
+        catalog_entry.config = config
+
+
+async def initialize_user_agent_catalog() -> None:
+    """Initialize user agent catalog from YAML."""
+    catalog = load_user_agent_catalog()
+
+    async with AsyncSessionLocal() as session:
+        async with session.begin():
+            for agent in catalog["agents"]:
+                result = await session.execute(
+                    select(Llm).where(Llm.model_code == agent["llm_model_code"])
+                )
+                llm = result.scalar_one_or_none()
+                if llm is None:
+                    raise RuntimeError(
+                        f"LLM model '{agent['llm_model_code']}' not found for agent type '{agent['agent_type']}'"
+                    )
+
+                await _upsert_user_agent_catalog(
+                    session,
+                    agent_type=agent["agent_type"],
+                    llm_id=llm.id,
+                    status=agent["status"],
+                    config=agent["config"],
+                )
+
+    logger.info("Initialized user agent catalog")
+
+
+async def initialize_llm_catalog() -> None:
+    """Initialize LLM catalog from YAML."""
     catalog = load_llm_catalog()
 
     async with AsyncSessionLocal() as session:
@@ -127,4 +220,11 @@ async def initialize_data() -> bool:
                 )
 
     logger.info("Initialized LLM factory/model seed data")
+
+
+async def initialize_data() -> bool:
+    """Initialize bootstrap data."""
+    await initialize_llm_catalog()
+    await initialize_user_agent_catalog()
+
     return True
diff --git a/backend/src/models/user_agent_catalog.py b/backend/src/models/user_agent_catalog.py
index 0791e87..a7bc9a8 100644
--- a/backend/src/models/user_agent_catalog.py
+++ b/backend/src/models/user_agent_catalog.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+import uuid
+
 from sqlalchemy import ForeignKey, String
 from sqlalchemy.dialects.postgresql import JSONB, UUID
 from sqlalchemy.orm import Mapped, mapped_column
@@ -14,7 +16,7 @@ class UserAgentCatalog(TimestampMixin, Base):
         String(20),
         primary_key=True,
     )
-    llm_id: Mapped[str] = mapped_column(
+    llm_id: Mapped[uuid.UUID] = mapped_column(
         UUID(as_uuid=True),
         ForeignKey("llms.id", ondelete="RESTRICT"),
         nullable=False,