From d479817b6a7ca4807b5de500b3ba713d436b0770 Mon Sep 17 00:00:00 2001
From: Kyle Mendell <kmendell@ofkm.us>
Date: Tue, 29 Jul 2025 17:34:49 -0500
Subject: [PATCH] feat: add support for `code_challenge_methods_supported`
 (#794)

---
 backend/internal/controller/well_known_controller.go | 1 +
 1 file changed, 1 insertion(+)

diff --git a/backend/internal/controller/well_known_controller.go b/backend/internal/controller/well_known_controller.go
index 4d5a2cf2..70d7c447 100644
--- a/backend/internal/controller/well_known_controller.go
+++ b/backend/internal/controller/well_known_controller.go
@@ -87,6 +87,7 @@ func (wkc *WellKnownController) computeOIDCConfiguration() ([]byte, error) {
 		"subject_types_supported":                        []string{"public"},
 		"id_token_signing_alg_values_supported":          []string{alg.String()},
 		"authorization_response_iss_parameter_supported": true,
+		"code_challenge_methods_supported":               []string{"plain", "S256"},
 	}
 	return json.Marshal(config)
 }