From 70106c7dc8b0ff9f0907504509d254c0e8bf745c Mon Sep 17 00:00:00 2001
From: SAY-5 <say.apm35@gmail.com>
Date: Thu, 30 Apr 2026 12:06:57 -0700
Subject: [PATCH 1/3] fix(scheduler): default Configuration.participants to
 empty list
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The Nylas Scheduler API does not include the 'participants' field on
group-event configurations, but Configuration.participants was a
non-nullable, no-default property. moshi-kotlin therefore raised:

  com.squareup.moshi.JsonDataException:
    Required value 'participants' missing at $.data[1]

whenever scheduler().configurations().list() returned a list
containing a group-event configuration, breaking the entire response.

Give the property a default value of emptyList() so moshi-kotlin
applies the default when the field is absent from the response. The
property's runtime type is unchanged (still
List<ConfigurationParticipant>), so existing callers — including the
'config.participants.first()' pattern in ConfigurationsTest — keep
compiling without modification.

Closes #310.

Signed-off-by: SAY-5 <say.apm35@gmail.com>
---
 src/main/kotlin/com/nylas/models/Scheduler.kt | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/src/main/kotlin/com/nylas/models/Scheduler.kt b/src/main/kotlin/com/nylas/models/Scheduler.kt
index e05fc401..cba794e3 100644
--- a/src/main/kotlin/com/nylas/models/Scheduler.kt
+++ b/src/main/kotlin/com/nylas/models/Scheduler.kt
@@ -12,10 +12,13 @@ data class Configuration(
   @Json(name = "id")
   val id: String,
   /**
-   * List of participants included in the scheduled event.
+   * List of participants included in the scheduled event. The Nylas API
+   * omits this field for group-event configurations, so default to an
+   * empty list to avoid a JsonDataException on deserialization while
+   * keeping the property's runtime type unchanged for existing callers.
    */
   @Json(name = "participants")
-  val participants: List<ConfigurationParticipant>,
+  val participants: List<ConfigurationParticipant> = emptyList(),
   /**
    * Rules that determine available time slots for the event.
    */

From e42ac0bdfcd38e15874ac4cd991deadabe6d7ef7 Mon Sep 17 00:00:00 2001
From: Gordan Ovcaric <gordan.ovcaric@hotmail.com>
Date: Fri, 1 May 2026 10:15:10 +0200
Subject: [PATCH 2/3] add unit test

---
 .claude/settings.local.json                   |  4 +++-
 .../com/nylas/resources/ConfigurationsTest.kt | 22 +++++++++++++++++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/.claude/settings.local.json b/.claude/settings.local.json
index 0165ab35..77a90758 100644
--- a/.claude/settings.local.json
+++ b/.claude/settings.local.json
@@ -12,7 +12,9 @@
       "Bash(/usr/libexec/java_home:*)",
       "Bash(./gradlew clean test:*)",
       "Bash(./gradlew:*)",
-      "Bash(./gradlew build:*)"
+      "Bash(./gradlew build:*)",
+      "Bash(gh pr *)",
+      "Bash(gh issue *)"
     ]
   }
 }
diff --git a/src/test/kotlin/com/nylas/resources/ConfigurationsTest.kt b/src/test/kotlin/com/nylas/resources/ConfigurationsTest.kt
index 61adad10..cb34cde1 100644
--- a/src/test/kotlin/com/nylas/resources/ConfigurationsTest.kt
+++ b/src/test/kotlin/com/nylas/resources/ConfigurationsTest.kt
@@ -231,6 +231,28 @@ class ConfigurationsTest {
       assertEquals("Custom Body", emailTemplate.bookingConfirmed?.body)
     }
 
+    @Test
+    fun `Configuration without participants field deserializes to empty list`() {
+      val adapter = JsonHelper.moshi().adapter(Configuration::class.java)
+      val jsonBuffer = Buffer().writeUtf8(
+        """
+        {
+          "id": "group-config-id",
+          "availability": {
+              "duration_minutes": 30
+          },
+          "event_booking": {
+              "title": "Group Event"
+          }
+        }
+        """.trimIndent(),
+      )
+      val config = adapter.fromJson(jsonBuffer)!!
+      assertIs<Configuration>(config)
+      assertEquals("group-config-id", config.id)
+      assertEquals(emptyList(), config.participants)
+    }
+
     @Test
     fun `AdditionalFieldType METADATA serializes correctly`() {
       val adapter = JsonHelper.moshi().adapter(AdditionalField::class.java)

From dab205fd789f8db24282bb6680ffeafb4ac4104c Mon Sep 17 00:00:00 2001
From: Gordan Ovcaric <gordan.ovcaric@hotmail.com>
Date: Fri, 1 May 2026 10:20:19 +0200
Subject: [PATCH 3/3] add to changelog

---
 CHANGELOG.md | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 83563dfa..d6ba6826 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,9 @@
   Valid values are strings `"1"` through `"11"`.
   See [Google Calendar Colors](https://developers.google.com/calendar/api/v3/reference/colors).
 
+### Fixed
+* `Configuration.participants` now defaults to an empty list when the field is absent from the API response (e.g. group-event configurations), preventing a `JsonDataException` from being thrown during deserialization.
+
 ## [v2.15.1] - Release 2026-03-30
 
 ### Changed