Add projects

backend/sdk/auth/interfaces.go

@@ -0,0 +1,29 @@
+package auth
+
+import (
+	"context"
+	"errors"
+	"time"
+
+	"github.com/router-for-me/CLIProxyAPI/v7/internal/config"
+	coreauth "github.com/router-for-me/CLIProxyAPI/v7/sdk/cliproxy/auth"
+)
+
+var ErrRefreshNotSupported = errors.New("cliproxy auth: refresh not supported")
+
+// LoginOptions captures generic knobs shared across authenticators.
+// Provider-specific logic can inspect Metadata for extra parameters.
+type LoginOptions struct {
+	NoBrowser    bool
+	ProjectID    string
+	CallbackPort int
+	Metadata     map[string]string
+	Prompt       func(prompt string) (string, error)
+}
+
+// Authenticator manages login and optional refresh flows for a provider.
+type Authenticator interface {
+	Provider() string
+	Login(ctx context.Context, cfg *config.Config, opts *LoginOptions) (*coreauth.Auth, error)
+	RefreshLead() *time.Duration
+}