feat: Add agent workspace system and runtime management

- Add agent core modules (agent_core, factory, registry, skill_loader)
- Add runtime system for agent execution management
- Add REST API for agents, workspaces, and runtime control
- Add process supervisor for agent lifecycle management
- Add workspace template system with agent profiles
- Add frontend RuntimeView and runtime API integration
- Add per-agent skill workspaces for smoke_fullstack run
- Refactor skill system with active/installed separation

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

backend/api/workspaces.py

@@ -0,0 +1,196 @@
+# -*- coding: utf-8 -*-
+"""
+Workspace API Routes
+
+Provides REST API endpoints for workspace management.
+"""
+from typing import Any, Dict, List, Optional
+
+from fastapi import APIRouter, HTTPException, Depends
+from pydantic import BaseModel, Field
+
+from backend.agents import WorkspaceManager
+
+router = APIRouter(prefix="/api/workspaces", tags=["workspaces"])
+
+
+# Request/Response Models
+class CreateWorkspaceRequest(BaseModel):
+    """Request to create a new workspace."""
+    workspace_id: str = Field(..., description="Unique workspace identifier")
+    name: Optional[str] = Field(None, description="Display name")
+    description: Optional[str] = Field(None, description="Workspace description")
+    metadata: Optional[Dict[str, Any]] = Field(None, description="Additional metadata")
+
+
+class UpdateWorkspaceRequest(BaseModel):
+    """Request to update a workspace."""
+    name: Optional[str] = None
+    description: Optional[str] = None
+    metadata: Optional[Dict[str, Any]] = None
+
+
+class WorkspaceResponse(BaseModel):
+    """Workspace information response."""
+    workspace_id: str
+    name: str
+    description: str
+    created_at: Optional[str] = None
+    metadata: Dict[str, Any] = Field(default_factory=dict)
+
+
+class WorkspaceListResponse(BaseModel):
+    """List of workspaces response."""
+    workspaces: List[WorkspaceResponse]
+    total: int
+
+
+# Dependencies
+def get_workspace_manager():
+    """Get WorkspaceManager instance."""
+    return WorkspaceManager()
+
+
+# Routes
+@router.post("", response_model=WorkspaceResponse)
+async def create_workspace(
+    request: CreateWorkspaceRequest,
+    manager: WorkspaceManager = Depends(get_workspace_manager),
+):
+    """
+    Create a new workspace.
+
+    Args:
+        request: Workspace creation parameters
+
+    Returns:
+        Created workspace information
+    """
+    try:
+        config = manager.create_workspace(
+            workspace_id=request.workspace_id,
+            name=request.name,
+            description=request.description,
+            metadata=request.metadata or {},
+        )
+        return WorkspaceResponse(
+            workspace_id=config.workspace_id,
+            name=config.name,
+            description=config.description,
+            created_at=config.created_at,
+            metadata=config.metadata,
+        )
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))
+
+
+@router.get("", response_model=WorkspaceListResponse)
+async def list_workspaces(
+    manager: WorkspaceManager = Depends(get_workspace_manager),
+):
+    """
+    List all workspaces.
+
+    Returns:
+        List of workspaces
+    """
+    workspaces = manager.list_workspaces()
+    return WorkspaceListResponse(
+        workspaces=[
+            WorkspaceResponse(
+                workspace_id=ws.workspace_id,
+                name=ws.name,
+                description=ws.description,
+                created_at=ws.created_at,
+                metadata=ws.metadata,
+            )
+            for ws in workspaces
+        ],
+        total=len(workspaces),
+    )
+
+
+@router.get("/{workspace_id}", response_model=WorkspaceResponse)
+async def get_workspace(
+    workspace_id: str,
+    manager: WorkspaceManager = Depends(get_workspace_manager),
+):
+    """
+    Get workspace details.
+
+    Args:
+        workspace_id: Workspace identifier
+
+    Returns:
+        Workspace information
+    """
+    workspace = manager.get_workspace(workspace_id)
+    if not workspace:
+        raise HTTPException(status_code=404, detail=f"Workspace '{workspace_id}' not found")
+
+    return WorkspaceResponse(
+        workspace_id=workspace["workspace_id"],
+        name=workspace.get("name", workspace_id),
+        description=workspace.get("description", ""),
+        created_at=workspace.get("created_at"),
+        metadata=workspace.get("metadata", {}),
+    )
+
+
+@router.patch("/{workspace_id}", response_model=WorkspaceResponse)
+async def update_workspace(
+    workspace_id: str,
+    request: UpdateWorkspaceRequest,
+    manager: WorkspaceManager = Depends(get_workspace_manager),
+):
+    """
+    Update workspace configuration.
+
+    Args:
+        workspace_id: Workspace identifier
+        request: Update parameters
+
+    Returns:
+        Updated workspace information
+    """
+    try:
+        config = manager.update_workspace_config(
+            workspace_id=workspace_id,
+            name=request.name,
+            description=request.description,
+            metadata=request.metadata,
+        )
+        return WorkspaceResponse(
+            workspace_id=config.workspace_id,
+            name=config.name,
+            description=config.description,
+            created_at=config.created_at,
+            metadata=config.metadata,
+        )
+    except ValueError as e:
+        raise HTTPException(status_code=404, detail=str(e))
+
+
+@router.delete("/{workspace_id}")
+async def delete_workspace(
+    workspace_id: str,
+    force: bool = False,
+    manager: WorkspaceManager = Depends(get_workspace_manager),
+):
+    """
+    Delete a workspace.
+
+    Args:
+        workspace_id: Workspace identifier
+        force: If True, delete even if workspace has agents
+
+    Returns:
+        Success message
+    """
+    try:
+        success = manager.delete_workspace(workspace_id, force=force)
+        if not success:
+            raise HTTPException(status_code=404, detail=f"Workspace '{workspace_id}' not found")
+        return {"message": f"Workspace '{workspace_id}' deleted successfully"}
+    except ValueError as e:
+        raise HTTPException(status_code=400, detail=str(e))