diff --git a/messages/agent.test.start.md b/messages/agent.test.start.md
new file mode 100644
index 0000000..4b73b25
--- /dev/null
+++ b/messages/agent.test.start.md
@@ -0,0 +1,33 @@
+# summary
+
+Start a test for an Agent.
+
+# description
+
+Start a test for an Agent, providing the AiEvalDefinitionVersion ID. Returns the job ID.
+
+# flags.id.summary
+
+The AiEvalDefinitionVersion ID.
+
+# flags.id.description
+
+The AiEvalDefinitionVersion ID.
+
+# flags.wait.summary
+
+Number of minutes to wait for the command to complete and display results to the terminal window.
+
+# flags.wait.description
+
+If the command continues to run after the wait period, the CLI returns control of the terminal window to you.
+
+# flags.output-dir.summary
+
+Directory in which to store test run files.
+
+# examples
+
+- Start a test for an Agent:
+
+  <%= config.bin %> <%= command.id %> --id AiEvalDefVerId
diff --git a/messages/hello.world.md b/messages/hello.world.md
deleted file mode 100644
index 804f848..0000000
--- a/messages/hello.world.md
+++ /dev/null
@@ -1,29 +0,0 @@
-# summary
-
-Say hello.
-
-# description
-
-Say hello either to the world or someone you know.
-
-# flags.name.summary
-
-The name of the person you'd like to say hello to.
-
-# flags.name.description
-
-This person can be anyone in the world!
-
-# examples
-
-- Say hello to the world:
-
-  <%= config.bin %> <%= command.id %>
-
-- Say hello to someone you know:
-
-  <%= config.bin %> <%= command.id %> --name Astro
-
-# info.hello
-
-Hello %s at %s.
diff --git a/src/commands/agent/run/test.ts b/src/commands/agent/run/test.ts
new file mode 100644
index 0000000..ee5c1af
--- /dev/null
+++ b/src/commands/agent/run/test.ts
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2024, salesforce.com, inc.
+ * All rights reserved.
+ * Licensed under the BSD 3-Clause license.
+ * For full license text, see LICENSE.txt file in the repo root or https://opensource.org/licenses/BSD-3-Clause
+ */
+
+import { SfCommand, Flags } from '@salesforce/sf-plugins-core';
+import { Messages } from '@salesforce/core';
+
+Messages.importMessagesDirectoryFromMetaUrl(import.meta.url);
+const messages = Messages.loadMessages('@salesforce/plugin-agent', 'agent.test.start');
+
+export type AgentRunTestResult = {
+  buildVersion: number;
+  jobId: string;
+  errorRepresentation?: string;
+};
+
+export default class AgentRunTest extends SfCommand<AgentRunTestResult> {
+  public static readonly summary = messages.getMessage('summary');
+  public static readonly description = messages.getMessage('description');
+  public static readonly examples = messages.getMessages('examples');
+
+  public static readonly flags = {
+    'target-org': Flags.requiredOrg(),
+    // AiEvalDefinitionVersion.Id -- This should really be "test-name"
+    id: Flags.string({
+      char: 'i',
+      required: true,
+      summary: messages.getMessage('flags.id.summary'),
+      description: messages.getMessage('flags.id.description'),
+    }),
+    wait: Flags.duration({
+      char: 'w',
+      unit: 'minutes',
+      min: 1,
+      summary: messages.getMessage('flags.wait.summary'),
+      description: messages.getMessage('flags.wait.description'),
+    }),
+    'output-dir': Flags.directory({
+      char: 'd',
+      summary: messages.getMessage('flags.output-dir.summary'),
+    }),
+    //
+    // Future flags:
+    //   result-format [csv, json, table, junit, TAP]
+    //   suites [array of suite names]
+    //   verbose [boolean]
+    //   ??? api-version or build-version ???
+  };
+
+  public async run(): Promise<AgentRunTestResult> {
+    const { flags } = await this.parse(AgentRunTest);
+
+    this.log(`Starting tests for AiEvalDefinitionVersion: ${flags.id}`);
+
+    // Call SF Eval Connect API passing AiEvalDefinitionVersion.Id
+
+    return {
+      buildVersion: 62.0, // looks like API version
+      jobId: '4KBSM000000003F4AQ', // evaluationJobId; needed for getting status and stopping
+    };
+  }
+}
diff --git a/src/commands/hello/world.ts b/src/commands/hello/world.ts
deleted file mode 100644
index 5b46ef5..0000000
--- a/src/commands/hello/world.ts
+++ /dev/null
@@ -1,42 +0,0 @@
-/*
- * Copyright (c) 2021, salesforce.com, inc.
- * All rights reserved.
- * Licensed under the BSD 3-Clause license.
- * For full license text, see LICENSE.txt file in the repo root or https://opensource.org/licenses/BSD-3-Clause
- */
-
-import { SfCommand, Flags } from '@salesforce/sf-plugins-core';
-import { Messages } from '@salesforce/core';
-
-Messages.importMessagesDirectoryFromMetaUrl(import.meta.url);
-const messages = Messages.loadMessages('@salesforce/plugin-agent', 'hello.world');
-
-export type HelloWorldResult = {
-  name: string;
-  time: string;
-};
-
-export default class World extends SfCommand<HelloWorldResult> {
-  public static readonly summary = messages.getMessage('summary');
-  public static readonly description = messages.getMessage('description');
-  public static readonly examples = messages.getMessages('examples');
-
-  public static readonly flags = {
-    name: Flags.string({
-      char: 'n',
-      summary: messages.getMessage('flags.name.summary'),
-      description: messages.getMessage('flags.name.description'),
-      default: 'World',
-    }),
-  };
-
-  public async run(): Promise<HelloWorldResult> {
-    const { flags } = await this.parse(World);
-    const time = new Date().toDateString();
-    this.log(messages.getMessage('info.hello', [flags.name, time]));
-    return {
-      name: flags.name,
-      time,
-    };
-  }
-}