diff --git a/config.inc.php b/config.inc.php
index 6fceae4..6361981 100644
--- a/config.inc.php
+++ b/config.inc.php
@@ -12,11 +12,13 @@ require_once(__DIR__ . '/msgpack.inc.php');
 class ConfigGlobals
 {
   public readonly array $base_dirs;
+  //NOTE: it's a string since is serialized
   public readonly ?string $worker_init_fn;
   public readonly int $workers_num;
   public readonly string $base_class;
   public readonly string $build_dir;
-  public readonly mixed $files_overrider; 
+  //NOTE: it's a string since is serialized
+  public readonly ?string $files_overrider; 
 
   function __construct(
     array $base_dirs, 
@@ -24,7 +26,7 @@ class ConfigGlobals
     ?string $worker_init_fn = null,
     int $workers_num = 1,
     string $base_class = '\ConfBase',
-    callable $files_overrider = null
+    ?string $files_overrider = null
   )
   {
     $this->base_dirs = array_map(fn($path) => normalize_path($path), $base_dirs);
@@ -65,10 +67,9 @@ class ConfigUpdateRequest
 {
   public ConfigUpdateMode $mode;
   public ?ConfigDirFiles $files;
-  public ?string $result_file;
   public ?\taskman\TaskmanFileChanges $file_changes;
   public bool $verbose = false;
-  public bool $return_entries = false;
+  public bool $return_affected = false;
 
   private function __construct() {}
 
@@ -83,7 +84,7 @@ class ConfigUpdateRequest
     return $req;
   }
 
-  static function detectChanged(string $result_file, \taskman\artefact\TaskmanDirFiles|ConfigDirFiles|null $files = null) : ConfigUpdateRequest
+  static function detectChanged(\taskman\artefact\TaskmanDirFiles|ConfigDirFiles|null $files = null) : ConfigUpdateRequest
   {
     if($files instanceof \taskman\artefact\TaskmanDirFiles)
       $files = ConfigDirFiles::makeFromArtefactFiles($files);
@@ -91,7 +92,6 @@ class ConfigUpdateRequest
     $req = new ConfigUpdateRequest();
     $req->mode = ConfigUpdateMode::DetectChanged;
     $req->files = $files;
-    $req->result_file = $result_file;
     return $req;
   }
 
@@ -110,7 +110,7 @@ class ConfigUpdateRequest
 
 class ConfigUpdateResult
 {
-  public ConfigUpdateMode $mode;
+  public ConfigUpdateRequest $request;
 
   public ConfigDirFiles $affected_files;
   public array $affected_entries = array();
@@ -125,8 +125,8 @@ class ConfigUpdateResult
 
   function isPatchPossible() : bool
   {
-    return ($this->mode == ConfigUpdateMode::Selected ||
-            $this->mode === ConfigUpdateMode::DetectChanged) && 
+    return ($this->request->mode == ConfigUpdateMode::Selected ||
+            $this->request->mode === ConfigUpdateMode::DetectChanged) && 
             count(array_filter($this->added_files, fn($f) => config_is_file($f))) == 0 &&
             count(array_filter($this->removed_files, fn($f) => config_is_file($f))) == 0;
   }
@@ -151,14 +151,8 @@ class ConfigManager
     return $this->globals;
   }
 
-  function getCache(ConfigGetMode $mode = ConfigGetMode::CacheOnly) : ConfigCache
+  function getCache() : ConfigCache
   {
-    if($mode != ConfigGetMode::CacheOnly)
-    {
-      foreach($this->getIterator($mode) as $ce) 
-      {}
-    }
-
     return $this->cache;
   }
 
@@ -181,40 +175,32 @@ class ConfigManager
     return $this->file_map;
   }
 
-  function getByPath(string $file, ConfigGetMode $mode = ConfigGetMode::Auto, bool $normalize_path = true) : ConfigCacheEntry
+  function fetchAll(bool $force = false) : \Generator
   {
-    if($normalize_path)
-      $file = normalize_path($file);
-
-    if($mode != ConfigGetMode::CacheOnly)
-    {
-      $cache_file = config_get_cache_path($this->globals, $file);
-
-      if($mode == ConfigGetMode::ForceUpdate || need_to_regen($cache_file, [$file]))
-      {
-        $base_dir = config_map_base_dir($this->globals->base_dirs, $file);
-        $parser_type = null;
-        $ce = _config_update_cache_entry($this->globals, $base_dir, $file, $cache_file, $parser_type);
-        $this->cache->update($ce);
-      }
-    }
-
-    return $this->cache->getOrLoadByPath($file);
+    $result = $this->updateAll($force);
+    return $this->iterateCache($result->request->files);
   }
 
-  function getIterator(ConfigGetMode $mode = ConfigGetMode::Auto, mixed $files = null, bool $normalize_path = false) : \Generator
+  function fetchByPath(string $path) : ConfigCacheEntry
   {
-    if($files === null)
-    {
-      $files = $this->scanFiles();
-      $normalize_path = false;
-    }
+    $path = realpath($path);
+    $dir_files = ConfigDirFiles::makeFor($this);
+    $dir_files->addFile($path);
+    $request = ConfigUpdateRequest::selected($dir_files);
+    $request->return_affected = true;
+    $result = $this->update($request);
+    return $result->affected_entries[0];
+  }
 
-    $cache_entries = [];
+  function iterateCache(iterable $files) : \Generator
+  {
     foreach($files as $file)
     {
-      $ce = $this->getByPath($file, $mode, normalize_path: $normalize_path);
-      yield $ce;
+      if(config_is_file($file))
+      {
+        $ce = $this->cache->getOrLoadByPath($file);
+        yield $ce;
+      }
     }
   }
 
@@ -237,7 +223,7 @@ class ConfigManager
     config_log("Affected files: {$affected_files->count()}");
 
     $update_result = new ConfigUpdateResult();
-    $update_result->mode = $req->mode;
+    $update_result->request = $req;
     $update_result->affected_files = $affected_files;
     $update_result->added_files = $added_files;
     $update_result->removed_files = $removed_files;
@@ -254,7 +240,7 @@ class ConfigManager
 
     $this->_updateFileMap($req, $affected_files, $added_files, $removed_files);
 
-    if($req->return_entries)
+    if($req->return_affected)
     {
       foreach($affected_files as $file)
       {
@@ -263,9 +249,26 @@ class ConfigManager
       }
     }
 
+    touch($this->_getLastUpdateFile());
+
     return $update_result;
   }
 
+  function updateAll(bool $force = false) : ConfigUpdateResult
+  {
+    $files = $this->scanFiles(extension: '.js');
+    $result = $this->update($force ? 
+      ConfigUpdateRequest::force($files) : 
+      ConfigUpdateRequest::detectChanged($files)
+    );
+    return $result;
+  }
+
+  function _getLastUpdateFile() : string
+  {
+    return $this->globals->build_dir . '/update.last';
+  }
+
   private function _updateCache(ConfigUpdateResult $result, ConfigCacheUpdateParams $params)
   {
     if($params->affected_files->isEmpty())
@@ -357,11 +360,13 @@ class ConfigManager
     {
       $affected_files = ConfigDirFiles::makeFor($this);
 
+      $last_run_file = $this->_getLastUpdateFile();
+
       foreach($req->files->getMap() as $base_dir => $files)
       {
         foreach($files as $file)
         {
-          if(need_to_regen($req->result_file, [$file]))
+          if(need_to_regen($last_run_file, [$file]))
           {
             $affected_files->add($base_dir, $file);
 
diff --git a/pack.inc.php b/pack.inc.php
index fb924a7..0344a25 100644
--- a/pack.inc.php
+++ b/pack.inc.php
@@ -42,10 +42,12 @@ function config_pack_bundle(ConfigPackParams $params) : string
 
   $packed_data = null;
 
+   $cache_entries = iterator_to_array($params->cache_entries);
+
   if($params->binary_format == 1)
   {
     $packed_data = _config_pack_bundle_fmt1(
-      $params->cache_entries, 
+      $cache_entries, 
       $params->use_lz4,
       $params->use_config_refs,
       $params->version
@@ -54,7 +56,7 @@ function config_pack_bundle(ConfigPackParams $params) : string
   else if($params->binary_format == 2)
   {
     $packed_data = _config_pack_bundle_fmt2(
-      $params->cache_entries, 
+      $cache_entries, 
       $params->use_lz4,
       $params->use_config_refs,
       $params->version,
@@ -63,7 +65,7 @@ function config_pack_bundle(ConfigPackParams $params) : string
   else if($params->binary_format == 3)
   {
     $packed_data = _config_pack_bundle_fmt3(
-      $params->cache_entries, 
+      $cache_entries, 
       $params->use_lz4,
       $params->use_config_refs,
       $params->version,
@@ -75,7 +77,7 @@ function config_pack_bundle(ConfigPackParams $params) : string
     throw new Exception("Unknown binary format: {$params->binary_format}");
 
   if($params->debug)
-    config_log("Packed entries: " . sizeof($params->cache_entries) . ", total: " . 
+    config_log("Packed entries: " . count($cache_entries) . ", total: " . 
       kb($packed_data) . ", format: {$params->binary_format}, lz4: " . 
       var_export($params->use_lz4, true) . ", refs: " . var_export($params->use_config_refs, true) . 
       ", CRC: " . crc32($packed_data) . 
@@ -115,7 +117,7 @@ function config_patch_bundle(ConfigPackParams $params, string $packed_data) : st
 
 //NOTE: strids are stored as CRCs, potential collision may happen (error will be raised during build) 
 function _config_pack_bundle_fmt1(
-  iterable $cache_entries, 
+  array $cache_entries, 
   bool $use_lz4, 
   bool $use_config_refs, 
   int $version) : string
@@ -173,7 +175,7 @@ function _config_pack_bundle_fmt1(
 //NOTE: strids are stored as lookup strings, and actually an array of lookup string indices
 //      (each path item separated by '/' is stored as an array item)
 function _config_pack_bundle_fmt2(
-  iterable $cache_entries, 
+  array $cache_entries, 
   bool $use_lz4, 
   bool $use_config_refs, 
   int $version,
@@ -287,7 +289,7 @@ function _config_pack_bundle_fmt3(
 
     $payloads_offset += $payload_size;
     
-    if($payloads_offset >= $chunk_size || $idx == ($count_entries - 1))  
+    if($payloads_offset >= $chunk_size || $idx == ($count_entries - 1))
     {
       if($payloads_offset > $max_chunk_size)
         $max_chunk_size = $payloads_offset;