From aa2bc9985c4464241cb77cc0609b0a8cdd58458f Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 5 Aug 2026 22:38:39 +0000
Subject: [PATCH 1/2] Initial plan


From 6f9fc5350274081998b9b3cb87ceb56329325e0b Mon Sep 17 00:00:00 2001
From: "copilot-swe-agent[bot]" <198982749+Copilot@users.noreply.github.com>
Date: Wed, 5 Aug 2026 22:41:26 +0000
Subject: [PATCH 2/2] fix: require explicit shared account fallback for
 contacts/calendars

Co-authored-by: rathlinus <139418639+rathlinus@users.noreply.github.com>
---
 lib/jmap/client.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/jmap/client.ts b/lib/jmap/client.ts
index d000bd872..aea238a33 100644
--- a/lib/jmap/client.ts
+++ b/lib/jmap/client.ts
@@ -4202,7 +4202,7 @@ export class JMAPClient implements IJMAPClient {
       // or are non-personal (shared/group) accounts - Stalwart doesn't
       // always advertise capabilities on group accounts even when they
       // have calendar resources.
-      if (account.accountCapabilities?.["urn:ietf:params:jmap:calendars"] || !account.isPersonal) {
+      if (account.accountCapabilities?.["urn:ietf:params:jmap:calendars"] || account.isPersonal === false) {
         accountIds.push(id);
       }
     }
@@ -4218,7 +4218,7 @@ export class JMAPClient implements IJMAPClient {
       // or are non-personal (shared/group) accounts - Stalwart doesn't
       // always advertise capabilities on group accounts even when they
       // have contact resources.
-      if (account.accountCapabilities?.["urn:ietf:params:jmap:contacts"] || !account.isPersonal) {
+      if (account.accountCapabilities?.["urn:ietf:params:jmap:contacts"] || account.isPersonal === false) {
         accountIds.push(id);
       }
     }