diff --git a/src/automats/articleSearchAutomat.js b/src/automats/articleSearchAutomat.js
index 7506fe7..f78ea25 100644
--- a/src/automats/articleSearchAutomat.js
+++ b/src/automats/articleSearchAutomat.js
@@ -16,6 +16,9 @@ import articleIndexAutomat from './articleIndexAutomat';
 import categoryAutomat from './categoryAutomat';
 import { parseFilter } from '../components/article/searchFormat';
 
+// #region Types & Initial State
+// MARK: typedefs, initial state, and FlexSearch instance variables
+
 /**
  * @typedef {Object} ArticleSearchResult
  * @property {Record<string,object>} categoryFacets Facet counts per category id.
@@ -67,7 +70,12 @@ const { Document, Charset } = FlexSearch;
 let flexDocument = null;
 let lastIndexedArticles = null;
 let articleByInternalId = new Map();
+// #endregion
 
+// #region Helpers
+
+// #region getOrCreateFlexIndex
+// MARK: constructs or retrieves FlexSearch document index
 /**
  * Lazily constructs and maintains the FlexSearch Document index for the given articles array.
  *
@@ -120,7 +128,10 @@ function getOrCreateFlexIndex(articles) {
   articleByInternalId = byId;
   return { doc, byId };
 }
+// #endregion
 
+// #region queryFlexSearch
+// MARK: queries FlexSearch document index
 /**
  * Searches the FlexSearch index with the query string.
  *
@@ -158,7 +169,10 @@ function queryFlexSearch(query, articles) {
   }
   return matchesList;
 }
+// #endregion
 
+// #region getArticleRelevanceScore
+// MARK: calculates search relevance score for an article
 /**
  * Calculates a search relevance score for an article record against a query.
  *
@@ -200,7 +214,10 @@ export function getArticleRelevanceScore(article, query) {
 
   return 10;
 }
+// #endregion
 
+// #region sortArticlesByRelevance
+// MARK: sorts articles by relevance score, name, and sku
 /**
  * Sorts articles by relevance to the query, breaking ties alphabetically by name and SKU.
  *
@@ -225,7 +242,10 @@ export function sortArticlesByRelevance(articles, query) {
     return String(a.sku ?? '').localeCompare(String(b.sku ?? ''), 'de');
   });
 }
+// #endregion
 
+// #region searchArticlesIndex
+// MARK: calls articleIndexAutomat.actions.ensureLoaded
 /**
  * Synchronously searches the article index using the search automat token matching and relevance order.
  *
@@ -308,7 +328,10 @@ export function searchArticlesIndex(query, options = {}) {
 
   return recordset;
 }
+// #endregion
 
+// #region isRootCategory
+// MARK: checks if category id or name represents the root category
 /**
  * Determines whether a category ID or name represents the root category.
  *
@@ -326,7 +349,10 @@ function isRootCategory(id, rootCategoryId, metaName) {
   }
   return false;
 }
+// #endregion
 
+// #region getCategoryAndDescendantIds
+// MARK: recursively collects category id and descendant category ids
 /**
  * Recursively collects categoryId and all its descendant category IDs.
  *
@@ -404,7 +430,10 @@ export function getCategoryAndDescendantIds(selectedCategories, categoriesMap, f
 
   return allIds;
 }
+// #endregion
 
+// #region matchesCategory
+// MARK: checks whether article matches expanded category ids
 /**
  * Checks whether an article belongs to at least one of the target categories.
  *
@@ -418,7 +447,10 @@ function matchesCategory(row, expandedCategoryIds) {
   const rowCats = String(row.categories).split(',').map((s) => s.trim());
   return rowCats.some((catId) => expandedCategoryIds.has(String(catId)));
 }
+// #endregion
 
+// #region buildCategoryFacets
+// MARK: computes category facet counts from matched articles
 /**
  * Computes facet counts for each category represented in matched articles.
  *
@@ -463,8 +495,14 @@ function buildCategoryFacets(matchedArticles) {
 
   return facets;
 }
+// #endregion
 
+// #endregion
+
+// #region Actions
 const actions = {
+  // #region runSearch
+  // MARK: runs in-memory search and derivation synchronously
   /**
    * Executes in-memory search and derivation synchronously.
    *
@@ -537,7 +575,10 @@ const actions = {
 
     return result;
   },
+  // #endregion
 
+  // #region search
+  // MARK: calls articleIndexAutomat.actions.ensureLoaded
   /**
    * Runs a client-side search over the article index with pagination.
    *
@@ -562,7 +603,10 @@ const actions = {
 
     return actions.runSearch(params);
   },
+  // #endregion
 
+  // #region setPageSize
+  // MARK: updates page size and re-derives result set
   /**
    * Updates the page size and re-derives the result set.
    *
@@ -572,7 +616,10 @@ const actions = {
   setPageSize(pageSize) {
     return actions.runSearch({ pageSize });
   },
+  // #endregion
 
+  // #region setPage
+  // MARK: sets 1-based page number and re-derives result set
   /**
    * Sets page number (1-based) and re-derives the result set.
    *
@@ -584,7 +631,10 @@ const actions = {
     const offset = Math.max(0, (page - 1) * safeSize);
     return actions.runSearch({ offset });
   },
+  // #endregion
 
+  // #region setOffset
+  // MARK: sets 0-based offset and re-derives result set
   /**
    * Sets 0-based offset and re-derives the result set.
    *
@@ -594,7 +644,10 @@ const actions = {
   setOffset(offset) {
     return actions.runSearch({ offset });
   },
+  // #endregion
 
+  // #region reset
+  // MARK: resets search state and clears FlexSearch index
   /** Reset the search state and clear FlexSearch index. */
   reset() {
     flexDocument = null;
@@ -602,7 +655,12 @@ const actions = {
     articleByInternalId = new Map();
     articleSearchAutomat.setState(initialState);
   },
+  // #endregion
 };
+// #endregion
+
+// #region Automat Instance & Subscriptions
+// MARK: initializes Automat instance and subscribes to articleIndexAutomat & categoryAutomat
 
 /**
  * Article search and pagination state for the `/artikel` overview page.
@@ -625,6 +683,10 @@ categoryAutomat.subscribe((catState) => {
     actions.runSearch();
   }
 });
+// #endregion
+
+// #region Selectors & Exports
+// MARK: selectSearchResult selector and default export
 
 /**
  * Selects the latest search result.
@@ -637,3 +699,4 @@ export function selectSearchResult(state) {
 }
 
 export default articleSearchAutomat;
+// #endregion