diff --git a/README.md b/README.md
index 49fbe94..f9a745a 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 Monitor changes to responses from various Arknights Endfield APIs and record them in this repository.
 
-Updates are checked hourly and automatically pushed via GitHub Actions.  
+Updates are checked about every 30 minutes and automatically pushed to GitHub Actions.  
 API outputs are stored in the [`output`](/output/) directory.
 
 The APIs currently being monitored are as follows:
diff --git a/src/cmds/test.ts b/src/cmds/test.ts
index 5295727..b735656 100644
--- a/src/cmds/test.ts
+++ b/src/cmds/test.ts
@@ -7,24 +7,76 @@ import appConfig from '../utils/config.js';
 import logger from '../utils/logger.js';
 import mathUtils from '../utils/math.js';
 
+function getObjectDiff(obj1: any, obj2: any) {
+  const diff: any = {};
+  const keys = new Set([...Object.keys(obj1 || {}), ...Object.keys(obj2 || {})]);
+  for (const key of keys) {
+    const val1 = obj1?.[key];
+    const val2 = obj2?.[key];
+    if (JSON.stringify(val1) !== JSON.stringify(val2)) {
+      if (typeof val1 === 'object' && val1 !== null && typeof val2 === 'object' && val2 !== null) {
+        const nestedDiff = getObjectDiff(val1, val2);
+        if (Object.keys(nestedDiff).length > 0) {
+          diff[key] = nestedDiff;
+        }
+      } else {
+        diff[key] = { old: val1, new: val2 };
+      }
+    }
+  }
+  return diff;
+}
+
+async function saveResult(
+  subPaths: string[],
+  version: string,
+  data: { req: any; rsp: any },
+  saveLatest: boolean = true,
+) {
+  const outputDir = argvUtils.getArgv()['outputDir'];
+  const filePathBase = path.join(outputDir, ...subPaths);
+
+  const filesToCheck = [path.join(filePathBase, `v${version}.json`)];
+  if (saveLatest) {
+    filesToCheck.push(path.join(filePathBase, 'latest.json'));
+  }
+
+  const dataStr = JSON.stringify(data, null, 2);
+  const dataMinified = JSON.stringify(data);
+
+  for (const filePath of filesToCheck) {
+    const file = Bun.file(filePath);
+    const exists = await file.exists();
+    let currentData: any = null;
+    if (exists) {
+      currentData = await file.json();
+    }
+    if (!exists || JSON.stringify(currentData) !== dataMinified) {
+      if (exists) {
+        logger.trace(`Diff detected in ${filePath}:`, JSON.stringify(getObjectDiff(currentData, data), null, 2));
+      }
+      await Bun.write(filePath, dataStr);
+    }
+  }
+
+  const allFilePath = path.join(filePathBase, 'all.json');
+  const allFile = Bun.file(allFilePath);
+  let allData: any[] = [];
+  if (await allFile.exists()) {
+    allData = await allFile.json();
+  }
+
+  const exists = allData.some((e: any) => JSON.stringify({ req: e.req, rsp: e.rsp }) === dataMinified);
+
+  if (!exists) {
+    allData.push({ updatedAt: DateTime.now().toISO(), ...data });
+    await Bun.write(allFilePath, JSON.stringify(allData, null, 2));
+  }
+}
+
 async function mainCmdHandler() {
   const cfg = appConfig.network.api.akEndfield;
-
-  // await (async () => {
-  //   const channel = appConfig.network.api.akEndfield.channel.osWinRel;
-  //   logger.debug('apiAkEndfield.launcher.web fetching ...');
-  //   for (const fn of [
-  //     apiUtils.apiAkEndfield.launcher.web.sidebar,
-  //     apiUtils.apiAkEndfield.launcher.web.singleEnt,
-  //     apiUtils.apiAkEndfield.launcher.web.mainBgImage,
-  //     apiUtils.apiAkEndfield.launcher.web.banner,
-  //     apiUtils.apiAkEndfield.launcher.web.announcement,
-  //   ]) {
-  //     console.dir(await fn(appConfig.network.api.akEndfield.appCode.osWinRel, channel, channel, 'ja-jp'), {
-  //       depth: null,
-  //     });
-  //   }
-  // })();
+  const channelStr = String(cfg.channel.osWinRel);
 
   await (async () => {
     logger.debug('Fetching latestGame ...');
@@ -59,54 +111,31 @@ async function mainCmdHandler() {
       },
       rsp,
     };
-    const filePathBase = path.join(
-      argvUtils.getArgv()['outputDir'],
-      'akEndfield',
-      'launcher',
-      'game',
-      String(cfg.channel.osWinRel),
-    );
-    for (const filePath of [path.join(filePathBase, 'latest.json'), path.join(filePathBase, `v${rsp.version}.json`)]) {
-      if (
-        (await Bun.file(filePath).exists()) === false ||
-        JSON.stringify(await Bun.file(filePath).json()) !== JSON.stringify(prettyRsp)
-      ) {
-        await Bun.write(filePath, JSON.stringify(prettyRsp, null, 2));
-      }
-    }
-    await (async () => {
-      let needWrite: boolean = true;
-      const tmp: ({ updatedAt: string } & typeof prettyRsp)[] = await Bun.file(
-        path.join(filePathBase, 'all.json'),
-      ).json();
-      for (const dataStr of tmp.map((e) => JSON.stringify({ req: e.req, rsp: e.rsp }))) {
-        if (dataStr === JSON.stringify(prettyRsp)) {
-          needWrite = false;
-        }
-      }
-      if (needWrite) {
-        tmp.push({ updatedAt: DateTime.now().toISO(), ...prettyRsp });
-        await Bun.write(path.join(filePathBase, 'all.json'), JSON.stringify(tmp, null, 2));
-      }
-    })();
+
+    await saveResult(['akEndfield', 'launcher', 'game', channelStr], rsp.version, prettyRsp);
   })();
 
   await (async () => {
     logger.debug('Fetching latestGameRes ...');
 
+    const gameAllJsonPath = path.join(
+      argvUtils.getArgv()['outputDir'],
+      'akEndfield',
+      'launcher',
+      'game',
+      channelStr,
+      'all.json',
+    );
+
+    if (!(await Bun.file(gameAllJsonPath).exists())) {
+      logger.warn('Skipping latestGameRes: game/all.json not found');
+      return;
+    }
+
     const versionInfoList = (
-      (
-        await Bun.file(
-          path.join(
-            argvUtils.getArgv()['outputDir'],
-            'akEndfield',
-            'launcher',
-            'game',
-            String(cfg.channel.osWinRel),
-            'all.json',
-          ),
-        ).json()
-      ).map((e: any) => e.rsp) as Awaited<ReturnType<typeof apiUtils.apiAkEndfield.launcher.latestGame>>[]
+      (await Bun.file(gameAllJsonPath).json()).map((e: any) => e.rsp) as Awaited<
+        ReturnType<typeof apiUtils.apiAkEndfield.launcher.latestGame>
+      >[]
     )
       .map((e) => ({
         version: e.version,
@@ -114,13 +143,6 @@ async function mainCmdHandler() {
         randStr: /_([^/]+)\/.+?$/.exec(e.pkg.file_path)![1],
       }))
       .sort((a, b) => semver.compare(b.version, a.version));
-    const filePathBase = path.join(
-      argvUtils.getArgv()['outputDir'],
-      'akEndfield',
-      'launcher',
-      'game_resources',
-      String(cfg.channel.osWinRel),
-    );
     let isLatestWrote: boolean = false;
     for (const versionInfoEntry of versionInfoList) {
       if (!versionInfoEntry.randStr) throw new Error('version rand_str not found');
@@ -140,36 +162,14 @@ async function mainCmdHandler() {
         },
         rsp,
       };
-      if (isLatestWrote === false) {
-        if (
-          (await Bun.file(path.join(filePathBase, 'latest.json')).exists()) === false ||
-          JSON.stringify(await Bun.file(path.join(filePathBase, 'latest.json')).json()) !== JSON.stringify(prettyRsp)
-        ) {
-          await Bun.write(path.join(filePathBase, 'latest.json'), JSON.stringify(prettyRsp, null, 2));
-        }
-        isLatestWrote = true;
-      }
-      for (const filePath of [path.join(filePathBase, `v${versionInfoEntry.version}.json`)]) {
-        if (
-          (await Bun.file(filePath).exists()) === false ||
-          JSON.stringify(await Bun.file(filePath).json()) !== JSON.stringify(prettyRsp)
-        ) {
-          await Bun.write(filePath, JSON.stringify(prettyRsp, null, 2));
-        }
-      }
-      await (async () => {
-        let needWrite: boolean = true;
-        const tmp: ({ updatedAt: string } & typeof prettyRsp)[] = await Bun.file(
-          path.join(filePathBase, 'all.json'),
-        ).json();
-        for (const dataStr of tmp.map((e) => JSON.stringify({ req: e.req, rsp: e.rsp }))) {
-          if (dataStr === JSON.stringify(prettyRsp)) needWrite = false;
-        }
-        if (needWrite) {
-          tmp.push({ updatedAt: DateTime.now().toISO(), ...prettyRsp });
-          await Bun.write(path.join(filePathBase, 'all.json'), JSON.stringify(tmp, null, 2));
-        }
-      })();
+
+      await saveResult(
+        ['akEndfield', 'launcher', 'game_resources', channelStr],
+        versionInfoEntry.version,
+        prettyRsp,
+        !isLatestWrote,
+      );
+      isLatestWrote = true;
     }
   })();
 
@@ -194,40 +194,12 @@ async function mainCmdHandler() {
         },
         rsp,
       };
-      const filePathBase = path.join(
-        argvUtils.getArgv()['outputDir'],
-        'akEndfield',
-        'launcher',
-        'launcher',
-        launcherTargetAppEntry,
-        String(cfg.channel.osWinRel),
+
+      await saveResult(
+        ['akEndfield', 'launcher', 'launcher', launcherTargetAppEntry, channelStr],
+        rsp.version,
+        prettyRsp,
       );
-      for (const filePath of [
-        path.join(filePathBase, 'latest.json'),
-        path.join(filePathBase, `v${rsp.version}.json`),
-      ]) {
-        if (
-          (await Bun.file(filePath).exists()) === false ||
-          JSON.stringify(await Bun.file(filePath).json()) !== JSON.stringify(prettyRsp)
-        ) {
-          await Bun.write(filePath, JSON.stringify(prettyRsp, null, 2));
-        }
-      }
-      await (async () => {
-        let needWrite: boolean = true;
-        const tmp: ({ updatedAt: string } & typeof prettyRsp)[] = await Bun.file(
-          path.join(filePathBase, 'all.json'),
-        ).json();
-        for (const dataStr of tmp.map((e) => JSON.stringify({ req: e.req, rsp: e.rsp }))) {
-          if (dataStr === JSON.stringify(prettyRsp)) {
-            needWrite = false;
-          }
-        }
-        if (needWrite) {
-          tmp.push({ updatedAt: DateTime.now().toISO(), ...prettyRsp });
-          await Bun.write(path.join(filePathBase, 'all.json'), JSON.stringify(tmp, null, 2));
-        }
-      })();
     }
   })();
 }