refactor(models): replace ConfigDict with SQLModelConfig for model configuration

backend/app/schemas/agents.py

@@ -7,7 +7,8 @@ from datetime import datetime
 from typing import Any
 from uuid import UUID
 
-from pydantic import ConfigDict, Field, field_validator
+from pydantic import Field, field_validator
+from sqlmodel._compat import SQLModelConfig
 from sqlmodel import SQLModel
 
 from app.schemas.common import NonEmptyStr
@@ -42,7 +43,7 @@ def _normalize_identity_profile(
 class AgentBase(SQLModel):
     """Common fields shared by agent create/read/update payloads."""
 
-    model_config = ConfigDict(
+    model_config = SQLModelConfig(
         json_schema_extra={
             "x-llm-intent": "agent_profile",
             "x-when-to-use": [
@@ -129,7 +130,7 @@ class AgentCreate(AgentBase):
 class AgentUpdate(SQLModel):
     """Payload for patching an existing agent."""
 
-    model_config = ConfigDict(
+    model_config = SQLModelConfig(
         json_schema_extra={
             "x-llm-intent": "agent_profile_update",
             "x-when-to-use": [
@@ -214,7 +215,7 @@ class AgentUpdate(SQLModel):
 class AgentRead(AgentBase):
     """Public agent representation returned by the API."""
 
-    model_config = ConfigDict(
+    model_config = SQLModelConfig(
         json_schema_extra={
             "x-llm-intent": "agent_profile_lookup",
             "x-when-to-use": [
@@ -251,7 +252,7 @@ class AgentRead(AgentBase):
 class AgentHeartbeat(SQLModel):
     """Heartbeat status payload sent by agents."""
 
-    model_config = ConfigDict(
+    model_config = SQLModelConfig(
         json_schema_extra={
             "x-llm-intent": "agent_health_signal",
             "x-when-to-use": [
@@ -272,7 +273,7 @@ class AgentHeartbeat(SQLModel):
 class AgentHeartbeatCreate(AgentHeartbeat):
     """Heartbeat payload used to create an agent lazily."""
 
-    model_config = ConfigDict(
+    model_config = SQLModelConfig(
         json_schema_extra={
             "x-llm-intent": "agent_bootstrap",
             "x-when-to-use": [
@@ -298,7 +299,7 @@ class AgentHeartbeatCreate(AgentHeartbeat):
 class AgentNudge(SQLModel):
     """Nudge message payload for pinging an agent."""
 
-    model_config = ConfigDict(
+    model_config = SQLModelConfig(
         json_schema_extra={
             "x-llm-intent": "agent_nudge",
             "x-when-to-use": [

backend/app/schemas/errors.py

@@ -2,14 +2,15 @@
 
 from __future__ import annotations
 
-from pydantic import ConfigDict, Field
+from pydantic import Field
 from sqlmodel import SQLModel
+from sqlmodel._compat import SQLModelConfig
 
 
 class LLMErrorResponse(SQLModel):
     """Standardized LLM-facing error payload used by API contracts."""
 
-    model_config = ConfigDict(
+    model_config = SQLModelConfig(
         json_schema_extra={
             "title": "LLMErrorResponse",
             "x-llm-intent": "llm_error_handling",

backend/app/schemas/gateway_coordination.py

@@ -5,7 +5,8 @@ from __future__ import annotations
 from typing import Literal
 from uuid import UUID
 
-from pydantic import ConfigDict, Field
+from pydantic import Field
+from sqlmodel._compat import SQLModelConfig
 from sqlmodel import SQLModel
 
 from app.schemas.common import NonEmptyStr
@@ -24,7 +25,7 @@ def _user_reply_tags() -> list[str]:
 class GatewayLeadMessageRequest(SQLModel):
     """Request payload for sending a message to a board lead agent."""
 
-    model_config = ConfigDict(
+    model_config = SQLModelConfig(
         json_schema_extra={
             "x-llm-intent": "lead_direct_message",
             "x-when-to-use": [
@@ -71,7 +72,7 @@ class GatewayLeadMessageRequest(SQLModel):
 class GatewayLeadMessageResponse(SQLModel):
     """Response payload for a lead-message dispatch attempt."""
 
-    model_config = ConfigDict(
+    model_config = SQLModelConfig(
         json_schema_extra={
             "x-llm-intent": "lead_direct_message_result",
             "x-when-to-use": [
@@ -104,7 +105,7 @@ class GatewayLeadMessageResponse(SQLModel):
 class GatewayLeadBroadcastRequest(SQLModel):
     """Request payload for broadcasting a message to multiple board leads."""
 
-    model_config = ConfigDict(
+    model_config = SQLModelConfig(
         json_schema_extra={
             "x-llm-intent": "lead_broadcast_message",
             "x-when-to-use": [
@@ -154,7 +155,7 @@ class GatewayLeadBroadcastRequest(SQLModel):
 class GatewayLeadBroadcastBoardResult(SQLModel):
     """Per-board result entry for a lead broadcast operation."""
 
-    model_config = ConfigDict(
+    model_config = SQLModelConfig(
         json_schema_extra={
             "x-llm-intent": "lead_broadcast_status",
             "x-when-to-use": [
@@ -184,7 +185,7 @@ class GatewayLeadBroadcastBoardResult(SQLModel):
 class GatewayLeadBroadcastResponse(SQLModel):
     """Aggregate response for a lead broadcast operation."""
 
-    model_config = ConfigDict(
+    model_config = SQLModelConfig(
         json_schema_extra={
             "x-llm-intent": "lead_broadcast_summary",
             "x-when-to-use": [
@@ -208,7 +209,7 @@ class GatewayLeadBroadcastResponse(SQLModel):
 class GatewayMainAskUserRequest(SQLModel):
     """Request payload for asking the end user via a main gateway agent."""
 
-    model_config = ConfigDict(
+    model_config = SQLModelConfig(
         json_schema_extra={
             "x-llm-intent": "human_escalation_request",
             "x-when-to-use": [
@@ -252,7 +253,7 @@ class GatewayMainAskUserRequest(SQLModel):
 class GatewayMainAskUserResponse(SQLModel):
     """Response payload for user-question dispatch via gateway main agent."""
 
-    model_config = ConfigDict(
+    model_config = SQLModelConfig(
         json_schema_extra={
             "x-llm-intent": "human_escalation_result",
             "x-when-to-use": [

backend/app/schemas/skills_marketplace.py

@@ -5,8 +5,9 @@ from __future__ import annotations
 from datetime import datetime
 from uuid import UUID
 
-from pydantic import AnyHttpUrl, ConfigDict
+from pydantic import AnyHttpUrl
 from sqlmodel import Field, SQLModel
+from sqlmodel._compat import SQLModelConfig
 
 from app.schemas.common import NonEmptyStr
 
@@ -30,7 +31,7 @@ class SkillPackCreate(SQLModel):
     branch: str = "main"
     metadata_: dict[str, object] = Field(default_factory=dict, alias="metadata")
 
-    model_config = ConfigDict(validate_by_name=True)
+    model_config = SQLModelConfig(validate_by_name=True)
 
 
 class MarketplaceSkillRead(SQLModel):
@@ -46,7 +47,7 @@ class MarketplaceSkillRead(SQLModel):
     source_url: str
     metadata_: dict[str, object] = Field(default_factory=dict, alias="metadata")
 
-    model_config = ConfigDict(validate_by_name=True)
+    model_config = SQLModelConfig(validate_by_name=True)
 
     created_at: datetime
     updated_at: datetime
@@ -63,7 +64,7 @@ class SkillPackRead(SQLModel):
     branch: str
     metadata_: dict[str, object] = Field(default_factory=dict, alias="metadata")
 
-    model_config = ConfigDict(validate_by_name=True)
+    model_config = SQLModelConfig(validate_by_name=True)
 
     skill_count: int = 0
     created_at: datetime