diff --git a/backend/app/schemas/__init__.py b/backend/app/schemas/__init__.py
index 9716653d..f93b7042 100644
--- a/backend/app/schemas/__init__.py
+++ b/backend/app/schemas/__init__.py
@@ -1,5 +1,13 @@
 from app.schemas.activity_events import ActivityEventRead
 from app.schemas.agents import AgentCreate, AgentRead, AgentUpdate
+from app.schemas.approvals import ApprovalCreate, ApprovalRead, ApprovalUpdate
+from app.schemas.board_memory import BoardMemoryCreate, BoardMemoryRead
+from app.schemas.board_onboarding import (
+    BoardOnboardingAnswer,
+    BoardOnboardingConfirm,
+    BoardOnboardingRead,
+    BoardOnboardingStart,
+)
 from app.schemas.boards import BoardCreate, BoardRead, BoardUpdate
 from app.schemas.gateways import GatewayCreate, GatewayRead, GatewayUpdate
 from app.schemas.metrics import DashboardMetrics
@@ -11,6 +19,15 @@ __all__ = [
     "AgentCreate",
     "AgentRead",
     "AgentUpdate",
+    "ApprovalCreate",
+    "ApprovalRead",
+    "ApprovalUpdate",
+    "BoardMemoryCreate",
+    "BoardMemoryRead",
+    "BoardOnboardingAnswer",
+    "BoardOnboardingConfirm",
+    "BoardOnboardingRead",
+    "BoardOnboardingStart",
     "BoardCreate",
     "BoardRead",
     "BoardUpdate",
diff --git a/backend/app/schemas/approvals.py b/backend/app/schemas/approvals.py
new file mode 100644
index 00000000..2277a581
--- /dev/null
+++ b/backend/app/schemas/approvals.py
@@ -0,0 +1,30 @@
+from __future__ import annotations
+
+from datetime import datetime
+from uuid import UUID
+
+from sqlmodel import SQLModel
+
+
+class ApprovalBase(SQLModel):
+    action_type: str
+    payload: dict[str, object] | None = None
+    confidence: int
+    rubric_scores: dict[str, int] | None = None
+    status: str = "pending"
+
+
+class ApprovalCreate(ApprovalBase):
+    agent_id: UUID | None = None
+
+
+class ApprovalUpdate(SQLModel):
+    status: str | None = None
+
+
+class ApprovalRead(ApprovalBase):
+    id: UUID
+    board_id: UUID
+    agent_id: UUID | None = None
+    created_at: datetime
+    resolved_at: datetime | None = None
diff --git a/backend/app/schemas/board_memory.py b/backend/app/schemas/board_memory.py
new file mode 100644
index 00000000..97eec0a7
--- /dev/null
+++ b/backend/app/schemas/board_memory.py
@@ -0,0 +1,18 @@
+from __future__ import annotations
+
+from datetime import datetime
+from uuid import UUID
+
+from sqlmodel import SQLModel
+
+
+class BoardMemoryCreate(SQLModel):
+    content: str
+    tags: list[str] | None = None
+    source: str | None = None
+
+
+class BoardMemoryRead(BoardMemoryCreate):
+    id: UUID
+    board_id: UUID
+    created_at: datetime
diff --git a/backend/app/schemas/board_onboarding.py b/backend/app/schemas/board_onboarding.py
new file mode 100644
index 00000000..5c28ca60
--- /dev/null
+++ b/backend/app/schemas/board_onboarding.py
@@ -0,0 +1,33 @@
+from __future__ import annotations
+
+from datetime import datetime
+from uuid import UUID
+
+from sqlmodel import SQLModel
+
+
+class BoardOnboardingStart(SQLModel):
+    pass
+
+
+class BoardOnboardingAnswer(SQLModel):
+    answer: str
+    other_text: str | None = None
+
+
+class BoardOnboardingConfirm(SQLModel):
+    board_type: str
+    objective: str | None = None
+    success_metrics: dict[str, object] | None = None
+    target_date: datetime | None = None
+
+
+class BoardOnboardingRead(SQLModel):
+    id: UUID
+    board_id: UUID
+    session_key: str
+    status: str
+    messages: list[dict[str, object]] | None = None
+    draft_goal: dict[str, object] | None = None
+    created_at: datetime
+    updated_at: datetime
diff --git a/backend/app/schemas/boards.py b/backend/app/schemas/boards.py
index 458c38bc..79b12591 100644
--- a/backend/app/schemas/boards.py
+++ b/backend/app/schemas/boards.py
@@ -3,6 +3,7 @@ from __future__ import annotations
 from datetime import datetime
 from uuid import UUID
 
+from pydantic import model_validator
 from sqlmodel import SQLModel
 
 
@@ -10,16 +11,33 @@ class BoardBase(SQLModel):
     name: str
     slug: str
     gateway_id: UUID | None = None
+    board_type: str = "goal"
+    objective: str | None = None
+    success_metrics: dict[str, object] | None = None
+    target_date: datetime | None = None
+    goal_confirmed: bool = False
+    goal_source: str | None = None
 
 
 class BoardCreate(BoardBase):
-    pass
+    @model_validator(mode="after")
+    def validate_goal_fields(self):
+        if self.board_type == "goal":
+            if not self.objective or not self.success_metrics:
+                raise ValueError("Goal boards require objective and success_metrics")
+        return self
 
 
 class BoardUpdate(SQLModel):
     name: str | None = None
     slug: str | None = None
     gateway_id: UUID | None = None
+    board_type: str | None = None
+    objective: str | None = None
+    success_metrics: dict[str, object] | None = None
+    target_date: datetime | None = None
+    goal_confirmed: bool | None = None
+    goal_source: str | None = None
 
 
 class BoardRead(BoardBase):
diff --git a/backend/tests/test_board_schema.py b/backend/tests/test_board_schema.py
new file mode 100644
index 00000000..db18fa66
--- /dev/null
+++ b/backend/tests/test_board_schema.py
@@ -0,0 +1,20 @@
+import pytest
+
+from app.schemas.boards import BoardCreate
+
+
+def test_goal_board_requires_objective_and_metrics():
+    with pytest.raises(ValueError):
+        BoardCreate(name="Goal Board", slug="goal", board_type="goal")
+
+    BoardCreate(
+        name="Goal Board",
+        slug="goal",
+        board_type="goal",
+        objective="Launch onboarding",
+        success_metrics={"emails": 3},
+    )
+
+
+def test_general_board_allows_missing_objective():
+    BoardCreate(name="General", slug="general", board_type="general")