diff --git a/packages/adapter-javascript/docs/README.md b/packages/adapter-javascript/docs/README.md
index 8821e573..622ddedf 100644
--- a/packages/adapter-javascript/docs/README.md
+++ b/packages/adapter-javascript/docs/README.md
@@ -86,7 +86,7 @@ Expected outputs
 - vendor/js-debug/watchdog.js (optional sidecar — copied if present)
 - vendor/js-debug/package.json (forces `type: 'commonjs'`)
 - vendor/js-debug/vsDebugServer.js.sha256
-- vendor/js-debug/manifest.json (metadata: source, repo, version, asset, sha256, fetchedAt)
+- vendor/js-debug/manifest.json (metadata: source, repo, version, asset, sha256)
 - vendor/ subdirectory (contains the js-debug vendored files)
 
 Determinism and safety
diff --git a/packages/adapter-javascript/scripts/build-js-debug.js b/packages/adapter-javascript/scripts/build-js-debug.js
index 85373321..c83e47b4 100644
--- a/packages/adapter-javascript/scripts/build-js-debug.js
+++ b/packages/adapter-javascript/scripts/build-js-debug.js
@@ -350,8 +350,7 @@ async function writeManifest({ source, repo, version, asset, sha256, original })
     version,
     asset,
     sha256,
-    ...(original ? { original } : {}),
-    fetchedAt: new Date().toISOString()
+    ...(original ? { original } : {})
   };
   await fsp.writeFile(MANIFEST_FILE, JSON.stringify(manifest, null, 2) + '\n', 'utf8');
 }
diff --git a/packages/codelldb-common/scripts/vendor-codelldb.js b/packages/codelldb-common/scripts/vendor-codelldb.js
index d08c33e1..cf4354c5 100644
--- a/packages/codelldb-common/scripts/vendor-codelldb.js
+++ b/packages/codelldb-common/scripts/vendor-codelldb.js
@@ -533,8 +533,7 @@ async function extractAndCopyFiles(vsixPath, platform, platformInfo, vsixName) {
     const versionFile = path.join(VENDOR_DIR, platformInfo.targetDir, 'version.json');
     await fs.writeFile(versionFile, JSON.stringify({
       version: CODELLDB_VERSION,
-      platform: platform,
-      downloadedAt: new Date().toISOString()
+      platform: platform
     }, null, 2));
     
     log(`Success: ${platform} vendored successfully`);