Add bounded administrative identity directories

auth/directory.go

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: MPL-2.0
+
+package auth
+
+import (
+	"context"
+	"errors"
+)
+
+var ErrDirectoryQuery = errors.New("auth: invalid directory query")
+
+// UserDirectoryQuery requests a bounded instance-wide identity listing. Search
+// is literal text, not a query language. AfterID is an exclusive stable-ID cursor;
+// Limit defaults to 50 and may not exceed 200.
+type UserDirectoryQuery struct {
+	Search, AfterID string
+	Limit           int
+}
+
+type UserDirectoryPage struct {
+	Users  []User
+	NextID string
+}
+
+// UserDirectoryRepository is an optional administrative read capability, not an
+// extension of ordinary authentication. Callers MUST authorize instance-wide
+// identity access before each call. Results include incomplete/inactive accounts
+// but never credentials, session material, recovery codes or permission grants.
+// Pagination is a current view, not a snapshot across requests.
+type UserDirectoryRepository interface {
+	UserDirectory(context.Context, UserDirectoryQuery) (UserDirectoryPage, error)
+}