Port remoteSession field from reference implementation

Add remoteSession field to SessionConfig, ResumeSessionConfig,
CreateSessionRequest, and ResumeSessionRequest. Wire it through
SessionRequestBuilder for both create and resume paths.

Reference implementation commit: 0159731 (Add remote_session field
to all SDK SessionConfig types)

Co-authored-by: edburns <75821+edburns@users.noreply.github.com>

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

@@ -151,6 +151,7 @@ static CreateSessionRequest buildCreateRequest(SessionConfig config, String sess
             request.setRequestAutoModeSwitch(true);
         }
         request.setGitHubToken(config.getGitHubToken());
+        request.setRemoteSession(config.getRemoteSession());
 
         return request;
     }
@@ -243,6 +244,7 @@ static ResumeSessionRequest buildResumeRequest(String sessionId, ResumeSessionCo
             request.setRequestAutoModeSwitch(true);
         }
         request.setGitHubToken(config.getGitHubToken());
+        request.setRemoteSession(config.getRemoteSession());
 
         return request;
     }

src/main/java/com/github/copilot/sdk/json/CreateSessionRequest.java

@@ -124,6 +124,9 @@ public final class CreateSessionRequest {
     @JsonProperty("gitHubToken")
     private String gitHubToken;
 
+    @JsonProperty("remoteSession")
+    private String remoteSession;
+
     /** Gets the model name. @return the model */
     public String getModel() {
         return model;
@@ -528,4 +531,16 @@ public String getGitHubToken() {
     public void setGitHubToken(String gitHubToken) {
         this.gitHubToken = gitHubToken;
     }
+
+    /** Gets the remote session mode. @return the remote session mode */
+    public String getRemoteSession() {
+        return remoteSession;
+    }
+
+    /**
+     * Sets the remote session mode. @param remoteSession the remote session mode
+     */
+    public void setRemoteSession(String remoteSession) {
+        this.remoteSession = remoteSession;
+    }
 }

src/main/java/com/github/copilot/sdk/json/ResumeSessionConfig.java

@@ -71,6 +71,7 @@ public class ResumeSessionConfig {
     private ExitPlanModeHandler onExitPlanMode;
     private AutoModeSwitchHandler onAutoModeSwitch;
     private String gitHubToken;
+    private String remoteSession;
 
     /**
      * Gets the AI model to use.
@@ -886,6 +887,34 @@ public ResumeSessionConfig setGitHubToken(String gitHubToken) {
         return this;
     }
 
+    /**
+     * Gets the per-session remote behavior control.
+     * <p>
+     * See {@link SessionConfig#getRemoteSession()} for details on possible values.
+     *
+     * @return the remote session mode, or {@code null} if not set
+     * @since 1.4.0
+     */
+    public String getRemoteSession() {
+        return remoteSession;
+    }
+
+    /**
+     * Sets the per-session remote behavior control.
+     * <p>
+     * See {@link SessionConfig#setRemoteSession(String)} for details on possible
+     * values.
+     *
+     * @param remoteSession
+     *            the remote session mode
+     * @return this config for method chaining
+     * @since 1.4.0
+     */
+    public ResumeSessionConfig setRemoteSession(String remoteSession) {
+        this.remoteSession = remoteSession;
+        return this;
+    }
+
     /**
      * Creates a shallow clone of this {@code ResumeSessionConfig} instance.
      * <p>
@@ -935,6 +964,7 @@ public ResumeSessionConfig clone() {
         copy.onExitPlanMode = this.onExitPlanMode;
         copy.onAutoModeSwitch = this.onAutoModeSwitch;
         copy.gitHubToken = this.gitHubToken;
+        copy.remoteSession = this.remoteSession;
         return copy;
     }
 }

src/main/java/com/github/copilot/sdk/json/ResumeSessionRequest.java

@@ -128,6 +128,9 @@ public final class ResumeSessionRequest {
     @JsonProperty("gitHubToken")
     private String gitHubToken;
 
+    @JsonProperty("remoteSession")
+    private String remoteSession;
+
     /** Gets the session ID. @return the session ID */
     public String getSessionId() {
         return sessionId;
@@ -555,4 +558,16 @@ public String getGitHubToken() {
     public void setGitHubToken(String gitHubToken) {
         this.gitHubToken = gitHubToken;
     }
+
+    /** Gets the remote session mode. @return the remote session mode */
+    public String getRemoteSession() {
+        return remoteSession;
+    }
+
+    /**
+     * Sets the remote session mode. @param remoteSession the remote session mode
+     */
+    public void setRemoteSession(String remoteSession) {
+        this.remoteSession = remoteSession;
+    }
 }

src/main/java/com/github/copilot/sdk/json/SessionConfig.java

@@ -71,6 +71,7 @@ public class SessionConfig {
     private ExitPlanModeHandler onExitPlanMode;
     private AutoModeSwitchHandler onAutoModeSwitch;
     private String gitHubToken;
+    private String remoteSession;
 
     /**
      * Gets the custom session ID.
@@ -939,6 +940,45 @@ public SessionConfig setGitHubToken(String gitHubToken) {
         return this;
     }
 
+    /**
+     * Gets the per-session remote behavior control.
+     * <p>
+     * Possible values:
+     * <ul>
+     * <li>{@code "off"} — local only, no remote export (default)</li>
+     * <li>{@code "export"} — export session events to GitHub without enabling
+     * remote steering</li>
+     * <li>{@code "on"} — export to GitHub AND enable remote steering</li>
+     * </ul>
+     *
+     * @return the remote session mode, or {@code null} if not set
+     * @since 1.4.0
+     */
+    public String getRemoteSession() {
+        return remoteSession;
+    }
+
+    /**
+     * Sets the per-session remote behavior control.
+     * <p>
+     * Possible values:
+     * <ul>
+     * <li>{@code "off"} — local only, no remote export (default)</li>
+     * <li>{@code "export"} — export session events to GitHub without enabling
+     * remote steering</li>
+     * <li>{@code "on"} — export to GitHub AND enable remote steering</li>
+     * </ul>
+     *
+     * @param remoteSession
+     *            the remote session mode
+     * @return this config instance for method chaining
+     * @since 1.4.0
+     */
+    public SessionConfig setRemoteSession(String remoteSession) {
+        this.remoteSession = remoteSession;
+        return this;
+    }
+
     /**
      * Creates a shallow clone of this {@code SessionConfig} instance.
      * <p>
@@ -988,6 +1028,7 @@ public SessionConfig clone() {
         copy.onExitPlanMode = this.onExitPlanMode;
         copy.onAutoModeSwitch = this.onAutoModeSwitch;
         copy.gitHubToken = this.gitHubToken;
+        copy.remoteSession = this.remoteSession;
         return copy;
     }
 }