fix(start-work): keep native command agents on config keys

src/plugin-interface.test.ts

@@ -165,7 +165,7 @@ describe("createPluginInterface - command.execute.before", () => {
     )
 
     // then
-    expect(output.message.agent).toBe("Atlas - Plan Executor")
+    expect(output.message.agent).toBe("atlas")
     expect(getSessionAgent("ses-command-atlas")).toBe("atlas")
     expect(readBoulderState(testDir)?.agent).toBe("atlas")
   })