Auto-assign as project option (default off)

- Project.auto_assign boolean field (default False)
- create_task only auto-assigns if project.auto_assign=True
- PATCH /projects/{id} accepts auto_assign
- ProjectOut includes auto_assign

src/tracker/api/projects.py

@@ -29,6 +29,7 @@ class ProjectUpdate(BaseModel):
     description: str | None = None
     repo_urls: list[str] | None = None
     status: str | None = None
+    auto_assign: bool | None = None
 
 
 class ProjectMemberAdd(BaseModel):
@@ -70,6 +71,7 @@ async def _project_out(p: Project, db: AsyncSession) -> ProjectOut:
         status=p.status,
         task_counter=p.task_counter,
         chat_id=str(chat.id) if chat else None,
+        auto_assign=p.auto_assign,
     )
 
 
@@ -126,6 +128,8 @@ async def update_project(project_id: str, req: ProjectUpdate, db: AsyncSession =
         project.repo_urls = req.repo_urls
     if req.status is not None:
         project.status = req.status
+    if req.auto_assign is not None:
+        project.auto_assign = req.auto_assign
 
     await db.commit()
     return await _project_out(project, db)

src/tracker/api/schemas.py

@@ -102,6 +102,7 @@ class ProjectOut(BaseModel):
     status: str
     task_counter: int
     chat_id: str | None = None
+    auto_assign: bool = False
 
     class Config:
         from_attributes = True

src/tracker/api/tasks.py

@@ -282,8 +282,8 @@ async def create_task(
     db.add(task)
     await db.flush()
 
-    # Auto-assign by capabilities if no assignee set
-    if not assignee_id and req.labels:
+    # Auto-assign by capabilities if enabled and no assignee set
+    if not assignee_id and req.labels and project.auto_assign:
         from ..models import AgentConfig, ProjectMember
         agents_q = await db.execute(
             select(Member, AgentConfig)

src/tracker/models/project.py

@@ -3,7 +3,7 @@
 import uuid
 from typing import TYPE_CHECKING
 
-from sqlalchemy import ForeignKey, Integer, String, Text, UniqueConstraint
+from sqlalchemy import Boolean, ForeignKey, Integer, String, Text, UniqueConstraint
 from sqlalchemy.dialects.postgresql import ARRAY, UUID
 from sqlalchemy.orm import Mapped, mapped_column, relationship
 
@@ -25,6 +25,7 @@ class Project(Base):
     repo_urls: Mapped[list[str]] = mapped_column(ARRAY(String), default=list)
     status: Mapped[str] = mapped_column(String(20), default=ProjectStatus.ACTIVE)  # active | archived
     task_counter: Mapped[int] = mapped_column(Integer, default=0)  # for sequential task numbers
+    auto_assign: Mapped[bool] = mapped_column(Boolean, default=False)  # auto-assign tasks by labels ↔ capabilities
 
     tasks: Mapped[list["Task"]] = relationship(back_populates="project", cascade="all, delete-orphan")
     chats: Mapped[list["Chat"]] = relationship(back_populates="project", cascade="all, delete-orphan")