feat(unstable): add resumeSession support

.github/workflows/publish.yml

@@ -29,6 +29,8 @@ jobs:
         with:
           token: ${{ steps.generate-token.outputs.token }}
           release-type: node
+          config-file: release-please-config.json
+          manifest-file: .release-please-manifest.json
     outputs:
       release_created: ${{ steps.release.outputs.release_created }}
   publish:

src/acp.ts

@@ -71,6 +71,13 @@ export class AgentSideConnection {
           const validatedParams = validate.zForkSessionRequest.parse(params);
           return agent.forkSession(validatedParams);
         }
+        case schema.AGENT_METHODS.session_resume: {
+          if (!agent.resumeSession) {
+            throw RequestError.methodNotFound(method);
+          }
+          const validatedParams = validate.zResumeSessionRequest.parse(params);
+          return agent.resumeSession(validatedParams);
+        }
         case schema.AGENT_METHODS.session_set_mode: {
           if (!agent.setSessionMode) {
             throw RequestError.methodNotFound(method);
@@ -631,6 +638,27 @@ export class ClientSideConnection implements Agent {
     );
   }
 
+  /**
+   * **UNSTABLE**
+   *
+   * This capability is not part of the spec yet, and may be removed or changed at any point.
+   *
+   * Resumes an existing session without returning previous messages.
+   *
+   * This method is only available if the agent advertises the `session.resume` capability.
+   *
+   * The agent should resume the session context, allowing the conversation to continue
+   * without replaying the message history (unlike `session/load`).
+   */
+  async resumeSession(
+    params: schema.ResumeSessionRequest,
+  ): Promise<schema.ResumeSessionResponse> {
+    return await this.#connection.sendRequest(
+      schema.AGENT_METHODS.session_resume,
+      params,
+    );
+  }
+
   /**
    * Sets the operational mode for a session.
    *
@@ -1416,6 +1444,21 @@ export interface Agent {
   forkSession?(
     params: schema.ForkSessionRequest,
   ): Promise<schema.ForkSessionResponse>;
+  /**
+   * **UNSTABLE**
+   *
+   * This capability is not part of the spec yet, and may be removed or changed at any point.
+   *
+   * Resumes an existing session without returning previous messages.
+   *
+   * This method is only available if the agent advertises the `session.resume` capability.
+   *
+   * The agent should resume the session context, allowing the conversation to continue
+   * without replaying the message history (unlike `session/load`).
+   */
+  resumeSession?(
+    params: schema.ResumeSessionRequest,
+  ): Promise<schema.ResumeSessionResponse>;
   /**
    * Sets the operational mode for a session.
    *