Convert 25 simple inner Data classes to Java records (#118)

Replace mutable inner Data classes with Java records across the events
package. Records provide immutable, concise DTOs with automatic equals,
hashCode, and toString. Jackson @JsonProperty annotations on constructor
parameters preserve JSON deserialization compatibility.

Updated all accessor calls in production code, tests, and documentation
to use record-style accessors (e.g., message() instead of getMessage()).

Author: brunoborges

src/main/java/com/github/copilot/sdk/CopilotSession.java

@@ -338,7 +338,7 @@ public CompletableFuture<AssistantMessageEvent> sendAndWait(MessageOptions optio
             } else if (evt instanceof SessionIdleEvent) {
                 future.complete(lastAssistantMessage.get());
             } else if (evt instanceof SessionErrorEvent errorEvent) {
-                String message = errorEvent.getData() != null ? errorEvent.getData().getMessage() : "session error";
+                String message = errorEvent.getData() != null ? errorEvent.getData().message() : "session error";
                 future.completeExceptionally(new RuntimeException("Session error: " + message));
             }
         };
@@ -463,7 +463,7 @@ public Closeable on(Consumer<AbstractSessionEvent> handler) {
      *
      * // Handle streaming deltas
      * session.on(AssistantMessageDeltaEvent.class, delta -> {
-     * 	System.out.print(delta.getData().getDeltaContent());
+     * 	System.out.print(delta.getData().deltaContent());
      * });
      * }</pre>
      *

src/main/java/com/github/copilot/sdk/events/AbortEvent.java

@@ -32,17 +32,6 @@ public void setData(AbortData data) {
     }
 
     @JsonIgnoreProperties(ignoreUnknown = true)
-    public static class AbortData {
-
-        @JsonProperty("reason")
-        private String reason;
-
-        public String getReason() {
-            return reason;
-        }
-
-        public void setReason(String reason) {
-            this.reason = reason;
-        }
+    public record AbortData(@JsonProperty("reason") String reason) {
     }
 }

src/main/java/com/github/copilot/sdk/events/AssistantIntentEvent.java

@@ -32,17 +32,6 @@ public void setData(AssistantIntentData data) {
     }
 
     @JsonIgnoreProperties(ignoreUnknown = true)
-    public static class AssistantIntentData {
-
-        @JsonProperty("intent")
-        private String intent;
-
-        public String getIntent() {
-            return intent;
-        }
-
-        public void setIntent(String intent) {
-            this.intent = intent;
-        }
+    public record AssistantIntentData(@JsonProperty("intent") String intent) {
     }
 }

src/main/java/com/github/copilot/sdk/events/AssistantMessageDeltaEvent.java

@@ -32,50 +32,9 @@ public void setData(AssistantMessageDeltaData data) {
     }
 
     @JsonIgnoreProperties(ignoreUnknown = true)
-    public static class AssistantMessageDeltaData {
-
-        @JsonProperty("messageId")
-        private String messageId;
-
-        @JsonProperty("deltaContent")
-        private String deltaContent;
-
-        @JsonProperty("totalResponseSizeBytes")
-        private Double totalResponseSizeBytes;
-
-        @JsonProperty("parentToolCallId")
-        private String parentToolCallId;
-
-        public String getMessageId() {
-            return messageId;
-        }
-
-        public void setMessageId(String messageId) {
-            this.messageId = messageId;
-        }
-
-        public String getDeltaContent() {
-            return deltaContent;
-        }
-
-        public void setDeltaContent(String deltaContent) {
-            this.deltaContent = deltaContent;
-        }
-
-        public Double getTotalResponseSizeBytes() {
-            return totalResponseSizeBytes;
-        }
-
-        public void setTotalResponseSizeBytes(Double totalResponseSizeBytes) {
-            this.totalResponseSizeBytes = totalResponseSizeBytes;
-        }
-
-        public String getParentToolCallId() {
-            return parentToolCallId;
-        }
-
-        public void setParentToolCallId(String parentToolCallId) {
-            this.parentToolCallId = parentToolCallId;
-        }
+    public record AssistantMessageDeltaData(@JsonProperty("messageId") String messageId,
+            @JsonProperty("deltaContent") String deltaContent,
+            @JsonProperty("totalResponseSizeBytes") Double totalResponseSizeBytes,
+            @JsonProperty("parentToolCallId") String parentToolCallId) {
     }
 }

src/main/java/com/github/copilot/sdk/events/AssistantReasoningDeltaEvent.java

@@ -32,28 +32,7 @@ public void setData(AssistantReasoningDeltaData data) {
     }
 
     @JsonIgnoreProperties(ignoreUnknown = true)
-    public static class AssistantReasoningDeltaData {
-
-        @JsonProperty("reasoningId")
-        private String reasoningId;
-
-        @JsonProperty("deltaContent")
-        private String deltaContent;
-
-        public String getReasoningId() {
-            return reasoningId;
-        }
-
-        public void setReasoningId(String reasoningId) {
-            this.reasoningId = reasoningId;
-        }
-
-        public String getDeltaContent() {
-            return deltaContent;
-        }
-
-        public void setDeltaContent(String deltaContent) {
-            this.deltaContent = deltaContent;
-        }
+    public record AssistantReasoningDeltaData(@JsonProperty("reasoningId") String reasoningId,
+            @JsonProperty("deltaContent") String deltaContent) {
     }
 }

src/main/java/com/github/copilot/sdk/events/AssistantReasoningEvent.java

@@ -32,28 +32,7 @@ public void setData(AssistantReasoningData data) {
     }
 
     @JsonIgnoreProperties(ignoreUnknown = true)
-    public static class AssistantReasoningData {
-
-        @JsonProperty("reasoningId")
-        private String reasoningId;
-
-        @JsonProperty("content")
-        private String content;
-
-        public String getReasoningId() {
-            return reasoningId;
-        }
-
-        public void setReasoningId(String reasoningId) {
-            this.reasoningId = reasoningId;
-        }
-
-        public String getContent() {
-            return content;
-        }
-
-        public void setContent(String content) {
-            this.content = content;
-        }
+    public record AssistantReasoningData(@JsonProperty("reasoningId") String reasoningId,
+            @JsonProperty("content") String content) {
     }
 }

src/main/java/com/github/copilot/sdk/events/AssistantTurnEndEvent.java

@@ -32,17 +32,6 @@ public void setData(AssistantTurnEndData data) {
     }
 
     @JsonIgnoreProperties(ignoreUnknown = true)
-    public static class AssistantTurnEndData {
-
-        @JsonProperty("turnId")
-        private String turnId;
-
-        public String getTurnId() {
-            return turnId;
-        }
-
-        public void setTurnId(String turnId) {
-            this.turnId = turnId;
-        }
+    public record AssistantTurnEndData(@JsonProperty("turnId") String turnId) {
     }
 }

src/main/java/com/github/copilot/sdk/events/AssistantTurnStartEvent.java

@@ -32,17 +32,6 @@ public void setData(AssistantTurnStartData data) {
     }
 
     @JsonIgnoreProperties(ignoreUnknown = true)
-    public static class AssistantTurnStartData {
-
-        @JsonProperty("turnId")
-        private String turnId;
-
-        public String getTurnId() {
-            return turnId;
-        }
-
-        public void setTurnId(String turnId) {
-            this.turnId = turnId;
-        }
+    public record AssistantTurnStartData(@JsonProperty("turnId") String turnId) {
     }
 }

src/main/java/com/github/copilot/sdk/events/PendingMessagesModifiedEvent.java

@@ -32,7 +32,6 @@ public void setData(PendingMessagesModifiedData data) {
     }
 
     @JsonIgnoreProperties(ignoreUnknown = true)
-    public static class PendingMessagesModifiedData {
-        // Empty data
+    public record PendingMessagesModifiedData() {
     }
 }