feat: scaffold codespace backend

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

internal/service/process_service.go

@@ -0,0 +1,48 @@
+package service
+
+import (
+	"codespace/internal/process"
+	"codespace/internal/workspace"
+)
+
+// ProcessService manages OpenCode processes for workspaces.
+type ProcessService struct {
+	workspaces workspace.Manager
+	processes  process.Manager
+}
+
+// NewProcessService creates a ProcessService.
+func NewProcessService(workspaces workspace.Manager, processes process.Manager) *ProcessService {
+	return &ProcessService{workspaces: workspaces, processes: processes}
+}
+
+// Start starts an OpenCode process for the given workspace.
+func (s *ProcessService) Start(workspaceID string) error {
+	ws, err := s.workspaces.Get(workspaceID)
+	if err != nil {
+		return err
+	}
+	return s.processes.Start(workspaceID, ws.Root)
+}
+
+// Stop stops the OpenCode process for the given workspace.
+func (s *ProcessService) Stop(workspaceID string) error {
+	return s.processes.Stop(workspaceID)
+}
+
+// Restart restarts the OpenCode process for the given workspace.
+func (s *ProcessService) Restart(workspaceID string) error {
+	ws, err := s.workspaces.Get(workspaceID)
+	if err != nil {
+		return err
+	}
+	return s.processes.Restart(workspaceID, ws.Root)
+}
+
+// Status returns the process status for the given workspace.
+func (s *ProcessService) Status(workspaceID string) (process.Status, error) {
+	if _, err := s.workspaces.Get(workspaceID); err != nil {
+		return process.Status{}, err
+	}
+	return s.processes.Status(workspaceID), nil
+}