Revert Java SDK changes

Remove Java preMcpToolCall hook implementation from this PR to be handled separately.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: stephentoub

java/.lastmerge

@@ -1 +1 @@
-553e662b83b2ba502d8a346cf898fb63bb3b12dc
+f6c1adf8329ad4206e5ed2e8d12fb8082bc841a2

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

@@ -81,7 +81,6 @@
 import com.github.copilot.sdk.json.PermissionRequestResult;
 import com.github.copilot.sdk.json.PermissionRequestResultKind;
 import com.github.copilot.sdk.json.PostToolUseHookInput;
-import com.github.copilot.sdk.json.PreMcpToolCallHookInput;
 import com.github.copilot.sdk.json.PreToolUseHookInput;
 import com.github.copilot.sdk.json.SendMessageRequest;
 import com.github.copilot.sdk.json.SendMessageResponse;
@@ -1555,13 +1554,6 @@ CompletableFuture<Object> handleHooksInvoke(String hookType, JsonNode input) {
                                 .thenApply(output -> (Object) output);
                     }
                     break;
-                case "preMcpToolCall" :
-                    if (hooks.getOnPreMcpToolCall() != null) {
-                        PreMcpToolCallHookInput mcpInput = MAPPER.treeToValue(input, PreMcpToolCallHookInput.class);
-                        return hooks.getOnPreMcpToolCall().handle(mcpInput, invocation)
-                                .thenApply(output -> (Object) output);
-                    }
-                    break;
                 case "userPromptSubmitted" :
                     if (hooks.getOnUserPromptSubmitted() != null) {
                         UserPromptSubmittedHookInput promptInput = MAPPER.treeToValue(input,

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

@@ -20,8 +20,8 @@
 public record PingResponse(
         /** The echo message from the server. */
         @JsonProperty("message") String message,
-        /** The server timestamp as an ISO-8601 string. */
-        @JsonProperty("timestamp") String timestamp,
+        /** The server timestamp in milliseconds since epoch. */
+        @JsonProperty("timestamp") long timestamp,
         /**
          * The SDK protocol version supported by the server. The SDK validates that this
          * version matches the expected version to ensure compatibility.

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

@@ -23,7 +23,7 @@ public class PostToolUseHookInput {
     private long timestamp;
 
     @JsonProperty("cwd")
-    private String workingDirectory;
+    private String cwd;
 
     @JsonProperty("toolName")
     private String toolName;
@@ -81,19 +81,19 @@ public PostToolUseHookInput setTimestamp(long timestamp) {
      *
      * @return the working directory path
      */
-    public String getWorkingDirectory() {
-        return workingDirectory;
+    public String getCwd() {
+        return cwd;
     }
 
     /**
      * Sets the current working directory.
      *
-     * @param workingDirectory
+     * @param cwd
      *            the working directory path
      * @return this instance for method chaining
      */
-    public PostToolUseHookInput setWorkingDirectory(String workingDirectory) {
-        this.workingDirectory = workingDirectory;
+    public PostToolUseHookInput setCwd(String cwd) {
+        this.cwd = cwd;
         return this;
     }
 

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

@@ -23,7 +23,7 @@ public class PreToolUseHookInput {
     private long timestamp;
 
     @JsonProperty("cwd")
-    private String workingDirectory;
+    private String cwd;
 
     @JsonProperty("toolName")
     private String toolName;
@@ -78,19 +78,19 @@ public PreToolUseHookInput setTimestamp(long timestamp) {
      *
      * @return the working directory path
      */
-    public String getWorkingDirectory() {
-        return workingDirectory;
+    public String getCwd() {
+        return cwd;
     }
 
     /**
      * Sets the current working directory.
      *
-     * @param workingDirectory
+     * @param cwd
      *            the working directory path
      * @return this instance for method chaining
      */
-    public PreToolUseHookInput setWorkingDirectory(String workingDirectory) {
-        this.workingDirectory = workingDirectory;
+    public PreToolUseHookInput setCwd(String cwd) {
+        this.cwd = cwd;
         return this;
     }
 

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

@@ -17,7 +17,7 @@
  *            the runtime session ID of the session that triggered the hook
  * @param timestamp
  *            the timestamp in milliseconds since epoch when the session ended
- * @param workingDirectory
+ * @param cwd
  *            the current working directory
  * @param reason
  *            the reason: "complete", "error", "abort", "timeout", or
@@ -30,7 +30,7 @@
  */
 @JsonIgnoreProperties(ignoreUnknown = true)
 public record SessionEndHookInput(@JsonProperty("sessionId") String sessionId,
-        @JsonProperty("timestamp") long timestamp, @JsonProperty("cwd") String workingDirectory,
+        @JsonProperty("timestamp") long timestamp, @JsonProperty("cwd") String cwd,
         @JsonProperty("reason") String reason, @JsonProperty("finalMessage") String finalMessage,
         @JsonProperty("error") String error) {
 }