feat(coord): add due_at field to coord_todos

Migration 20260526_150000 adds nullable due_at datetime column. Model, schemas
(create/update/response), and sync.sh display updated. Sync output now shows
due:YYYY-MM-DDTHH:MM alongside any todo with a due date.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/scripts/sync.sh

@@ -482,9 +482,11 @@ for group_name in sorted(groups.keys(), key=lambda x: (x == "Personal", x)):
         if t.get("assigned_to_machine") and t["assigned_to_machine"].upper() != "$TODO_MACHINE".upper():
             assigned += f"/{t['assigned_to_machine']}"
         auto = " [auto]" if t.get("auto_created") else ""
-        print(f"    [ ] {t['text']}{auto}{assigned}  (id:{t['id'][:8]})")
+        due = f"  due:{t['due_at'][:16]}" if t.get("due_at") else ""
+        print(f"    [ ] {t['text']}{auto}{due}{assigned}  (id:{t['id'][:8]})")
         for st in subtask_map.get(t["id"], []):
-            print(f"        [ ] {st['text']}  (id:{st['id'][:8]})")
+            st_due = f"  due:{st['due_at'][:16]}" if st.get("due_at") else ""
+            print(f"        [ ] {st['text']}{st_due}  (id:{st['id'][:8]})")
 PYEOF
         echo ""
     else

api/models/coord_todo.py

@@ -60,6 +60,11 @@ class CoordTodo(Base, UUIDMixin, TimestampMixin):
         doc="Status: pending / done / cancelled"
     )
 
+    due_at: Mapped[Optional[datetime]] = mapped_column(
+        DateTime,
+        doc="When the item is due"
+    )
+
     completed_at: Mapped[Optional[datetime]] = mapped_column(
         DateTime,
         doc="When the item was marked done"

api/schemas/coord_todo.py

@@ -19,6 +19,7 @@ class CoordTodoCreate(BaseModel):
     assigned_to_machine: Optional[str] = Field(None, description="Target hostname", max_length=100)
     auto_created: bool = Field(False, description="True when Claude auto-generated this item")
     source_context: Optional[str] = Field(None, description="Why Claude auto-created this item")
+    due_at: Optional[datetime] = Field(None, description="When the item is due")
     created_by_user: str = Field(..., description="User creating the item", max_length=50)
     created_by_machine: str = Field(..., description="Hostname where the item is created", max_length=100)
 
@@ -31,6 +32,7 @@ class CoordTodoUpdate(BaseModel):
     assigned_to_user: Optional[str] = Field(None, max_length=50)
     assigned_to_machine: Optional[str] = Field(None, max_length=100)
     project_key: Optional[str] = Field(None, max_length=100)
+    due_at: Optional[datetime] = Field(None, description="When the item is due")
     completed_by: Optional[str] = Field(None, description="Session or user completing the item", max_length=100)
 
 
@@ -45,6 +47,7 @@ class CoordTodoResponse(BaseModel):
     assigned_to_machine: Optional[str]
     auto_created: bool
     source_context: Optional[str]
+    due_at: Optional[datetime]
     status: str
     completed_at: Optional[datetime]
     completed_by: Optional[str]

migrations/versions/20260526_150000_coord_todos_due_at.py

@@ -0,0 +1,24 @@
+"""coord_todos add due_at column
+
+Revision ID: 20260526_150000
+Revises: 20260526_120000
+Create Date: 2026-05-26 15:00:00
+"""
+
+from typing import Sequence, Union
+
+import sqlalchemy as sa
+from alembic import op
+
+revision: str = "20260526_150000"
+down_revision: Union[str, None] = "20260526_120000"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.add_column("coord_todos", sa.Column("due_at", sa.DateTime(), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column("coord_todos", "due_at")