java: update @github/copilot dependency to ^1.0.57

- Update codegen package.json and lock file to ^1.0.57
- Regenerate Java sources from updated Zod schemas
- New types: ContextTier, SessionExtensionsAttachmentsPushedEvent,
  ServerRuntimeApi, ServerUserApi, SessionCanvasActionApi, and more
- Fix compilation: add contextTier param to SessionModelSwitchToParams
  call sites, suppressCustomAgentPrompt and new trailing fields to
  SessionOptionsUpdateParams, extra field to SessionStartEventData
- Update tests to match new record constructor signatures

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

Author: edburns

java/scripts/codegen/package-lock.json

@@ -7,7 +7,7 @@
     "generate:java": "tsx java.ts"
   },
   "dependencies": {
-    "@github/copilot": "^1.0.55-5",
+    "@github/copilot": "^1.0.57",
     "json-schema": "^0.4.0",
     "tsx": "^4.20.6"
   }

java/scripts/codegen/package.json

@@ -0,0 +1,35 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *--------------------------------------------------------------------------------------------*/
+
+// AUTO-GENERATED FILE - DO NOT EDIT
+// Generated from: session-events.schema.json
+
+package com.github.copilot.generated;
+
+import javax.annotation.processing.Generated;
+
+/**
+ * Allowed values for the `ContextTier` enumeration.
+ *
+ * @since 1.0.0
+ */
+@javax.annotation.processing.Generated("copilot-sdk-codegen")
+public enum ContextTier {
+    /** The {@code default} variant. */
+    DEFAULT("default"),
+    /** The {@code long_context} variant. */
+    LONG_CONTEXT("long_context");
+
+    private final String value;
+    ContextTier(String value) { this.value = value; }
+    @com.fasterxml.jackson.annotation.JsonValue
+    public String getValue() { return value; }
+    @com.fasterxml.jackson.annotation.JsonCreator
+    public static ContextTier fromValue(String value) {
+        for (ContextTier v : values()) {
+            if (v.value.equals(value)) return v;
+        }
+        throw new IllegalArgumentException("Unknown ContextTier value: " + value);
+    }
+}

java/src/generated/java/com/github/copilot/generated/ContextTier.java

@@ -111,6 +111,7 @@
     @JsonSubTypes.Type(value = SessionExtensionsLoadedEvent.class, name = "session.extensions_loaded"),
     @JsonSubTypes.Type(value = SessionCanvasOpenedEvent.class, name = "session.canvas.opened"),
     @JsonSubTypes.Type(value = SessionCanvasRegistryChangedEvent.class, name = "session.canvas.registry_changed"),
+    @JsonSubTypes.Type(value = SessionExtensionsAttachmentsPushedEvent.class, name = "session.extensions.attachments_pushed"),
     @JsonSubTypes.Type(value = McpAppToolCallCompleteEvent.class, name = "mcp_app.tool_call_complete")
 })
 @javax.annotation.processing.Generated("copilot-sdk-codegen")
@@ -201,6 +202,7 @@ public abstract sealed class SessionEvent permits
         SessionExtensionsLoadedEvent,
         SessionCanvasOpenedEvent,
         SessionCanvasRegistryChangedEvent,
+        SessionExtensionsAttachmentsPushedEvent,
         McpAppToolCallCompleteEvent,
         UnknownSessionEvent {
 

java/src/generated/java/com/github/copilot/generated/SessionEvent.java

@@ -0,0 +1,43 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *--------------------------------------------------------------------------------------------*/
+
+// AUTO-GENERATED FILE - DO NOT EDIT
+// Generated from: session-events.schema.json
+
+package com.github.copilot.generated;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import java.util.List;
+import javax.annotation.processing.Generated;
+
+/**
+ * Session event "session.extensions.attachments_pushed".
+ *
+ * @since 1.0.0
+ */
+@JsonIgnoreProperties(ignoreUnknown = true)
+@JsonInclude(JsonInclude.Include.NON_NULL)
+@javax.annotation.processing.Generated("copilot-sdk-codegen")
+public final class SessionExtensionsAttachmentsPushedEvent extends SessionEvent {
+
+    @Override
+    public String getType() { return "session.extensions.attachments_pushed"; }
+
+    @JsonProperty("data")
+    private SessionExtensionsAttachmentsPushedEventData data;
+
+    public SessionExtensionsAttachmentsPushedEventData getData() { return data; }
+    public void setData(SessionExtensionsAttachmentsPushedEventData data) { this.data = data; }
+
+    /** Data payload for {@link SessionExtensionsAttachmentsPushedEvent}. */
+    @JsonIgnoreProperties(ignoreUnknown = true)
+    @JsonInclude(JsonInclude.Include.NON_NULL)
+    public record SessionExtensionsAttachmentsPushedEventData(
+        /** Attachments contributed by an extension; the host should surface these as composer pills and forward them via the next session.send call. */
+        @JsonProperty("attachments") List<Object> attachments
+    ) {
+    }
+}

java/src/generated/java/com/github/copilot/generated/SessionExtensionsAttachmentsPushedEvent.java

@@ -48,28 +48,9 @@ public record SessionModelChangeEventData(
         /** Reasoning summary mode after the model change, if applicable */
         @JsonProperty("reasoningSummary") ReasoningSummary reasoningSummary,
         /** Context tier after the model change; null explicitly clears a previously selected tier */
-        @JsonProperty("contextTier") SessionModelChangeEventDataContextTier contextTier,
+        @JsonProperty("contextTier") ContextTier contextTier,
         /** Reason the change happened, when not user-initiated. Currently `"rate_limit_auto_switch"` for changes triggered by the auto-mode-switch rate-limit recovery path. UI clients can use this to render contextual copy. */
         @JsonProperty("cause") String cause
     ) {
-
-        public enum SessionModelChangeEventDataContextTier {
-            /** The {@code default} variant. */
-            DEFAULT("default"),
-            /** The {@code long_context} variant. */
-            LONG_CONTEXT("long_context");
-
-            private final String value;
-            SessionModelChangeEventDataContextTier(String value) { this.value = value; }
-            @com.fasterxml.jackson.annotation.JsonValue
-            public String getValue() { return value; }
-            @com.fasterxml.jackson.annotation.JsonCreator
-            public static SessionModelChangeEventDataContextTier fromValue(String value) {
-                for (SessionModelChangeEventDataContextTier v : values()) {
-                    if (v.value.equals(value)) return v;
-                }
-                throw new IllegalArgumentException("Unknown SessionModelChangeEventDataContextTier value: " + value);
-            }
-        }
     }
 }

java/src/generated/java/com/github/copilot/generated/SessionModelChangeEvent.java

@@ -46,6 +46,8 @@ public record SessionResumeEventData(
         @JsonProperty("reasoningEffort") String reasoningEffort,
         /** Reasoning summary mode used for model calls, if applicable (e.g. "none", "concise", "detailed") */
         @JsonProperty("reasoningSummary") ReasoningSummary reasoningSummary,
+        /** Context tier currently selected at resume time; null when no tier is active */
+        @JsonProperty("contextTier") ContextTier contextTier,
         /** Updated working directory and git context at resume time */
         @JsonProperty("context") WorkingDirectoryContext context,
         /** Whether the session was already in use by another client at resume time */

java/src/generated/java/com/github/copilot/generated/SessionResumeEvent.java

@@ -52,6 +52,8 @@ public record SessionStartEventData(
         @JsonProperty("reasoningEffort") String reasoningEffort,
         /** Reasoning summary mode used for model calls, if applicable (e.g. "none", "concise", "detailed") */
         @JsonProperty("reasoningSummary") ReasoningSummary reasoningSummary,
+        /** Context tier selected at session creation time for models with tiered context pricing; null when no tier is selected (e.g., non-tiered model) */
+        @JsonProperty("contextTier") ContextTier contextTier,
         /** Working directory and git context at session start */
         @JsonProperty("context") WorkingDirectoryContext context,
         /** Whether the session was already in use by another client at start time */

java/src/generated/java/com/github/copilot/generated/SessionStartEvent.java

@@ -41,6 +41,8 @@ public record ToolExecutionStartEventData(
         @JsonProperty("toolName") String toolName,
         /** Arguments passed to the tool */
         @JsonProperty("arguments") Object arguments,
+        /** Model identifier that generated this tool call */
+        @JsonProperty("model") String model,
         /** Name of the MCP server hosting this tool, when the tool is an MCP tool */
         @JsonProperty("mcpServerName") String mcpServerName,
         /** Original tool name on the MCP server, when the tool is an MCP tool */

java/src/generated/java/com/github/copilot/generated/ToolExecutionStartEvent.java

@@ -0,0 +1,41 @@
+/*---------------------------------------------------------------------------------------------
+ *  Copyright (c) Microsoft Corporation. All rights reserved.
+ *--------------------------------------------------------------------------------------------*/
+
+// AUTO-GENERATED FILE - DO NOT EDIT
+// Generated from: api.schema.json
+
+package com.github.copilot.generated.rpc;
+
+import com.fasterxml.jackson.annotation.JsonIgnoreProperties;
+import com.fasterxml.jackson.annotation.JsonInclude;
+import com.fasterxml.jackson.annotation.JsonProperty;
+import javax.annotation.processing.Generated;
+
+/**
+ * Canvas action invocation parameters sent to the provider.
+ *
+ * @since 1.0.0
+ */
+@javax.annotation.processing.Generated("copilot-sdk-codegen")
+@JsonInclude(JsonInclude.Include.NON_NULL)
+@JsonIgnoreProperties(ignoreUnknown = true)
+public record CanvasActionInvokeParams(
+    /** Target session identifier */
+    @JsonProperty("sessionId") String sessionId,
+    /** Owning provider identifier */
+    @JsonProperty("extensionId") String extensionId,
+    /** Provider-local canvas identifier */
+    @JsonProperty("canvasId") String canvasId,
+    /** Canvas instance identifier */
+    @JsonProperty("instanceId") String instanceId,
+    /** Action name to invoke */
+    @JsonProperty("actionName") String actionName,
+    /** Action input */
+    @JsonProperty("input") Object input,
+    /** Host context supplied by the runtime. */
+    @JsonProperty("host") CanvasHostContext host,
+    /** Session context supplied by the runtime. */
+    @JsonProperty("session") CanvasSessionContext session
+) {
+}