diff --git a/.eslintrc.cjs.bak b/.eslintrc.cjs.bak
new file mode 100644
index 0000000..d589258
--- /dev/null
+++ b/.eslintrc.cjs.bak
@@ -0,0 +1,29 @@
+module.exports = {
+  root: true,
+  parser: '@typescript-eslint/parser',
+  parserOptions: {
+    ecmaVersion: 2022,
+    sourceType: 'module',
+  },
+  plugins: ['@typescript-eslint'],
+  extends: [
+    'eslint:recommended',
+    'plugin:@typescript-eslint/recommended',
+    'prettier',
+  ],
+  env: {
+    node: true,
+    es2022: true,
+  },
+  rules: {
+    '@typescript-eslint/no-unused-vars': ['error', { argsIgnorePattern: '^_' }],
+    '@typescript-eslint/no-explicit-any': 'warn',
+    'no-console': 'off',
+  },
+  ignorePatterns: [
+    'dist/',
+    'node_modules/',
+    'webapp/dist/',
+    'webapp/node_modules/',
+  ],
+};
diff --git a/coverage/coverage-summary.json b/coverage/coverage-summary.json
new file mode 100644
index 0000000..b5b7fe9
--- /dev/null
+++ b/coverage/coverage-summary.json
@@ -0,0 +1,22 @@
+{"total": {"lines":{"total":879,"covered":199,"skipped":0,"pct":22.63},"statements":{"total":967,"covered":226,"skipped":0,"pct":23.37},"functions":{"total":146,"covered":38,"skipped":0,"pct":26.02},"branches":{"total":497,"covered":100,"skipped":0,"pct":20.12},"branchesTrue":{"total":0,"covered":0,"skipped":0,"pct":100}}
+,"C:\\GitHub\\Mind-o-Mat\\src\\index.ts": {"lines":{"total":0,"covered":0,"skipped":0,"pct":100},"functions":{"total":0,"covered":0,"skipped":0,"pct":100},"statements":{"total":0,"covered":0,"skipped":0,"pct":100},"branches":{"total":0,"covered":0,"skipped":0,"pct":100}}
+,"C:\\GitHub\\Mind-o-Mat\\src\\ingest.ts": {"lines":{"total":58,"covered":58,"skipped":0,"pct":100},"functions":{"total":9,"covered":9,"skipped":0,"pct":100},"statements":{"total":66,"covered":65,"skipped":0,"pct":98.48},"branches":{"total":28,"covered":24,"skipped":0,"pct":85.71}}
+,"C:\\GitHub\\Mind-o-Mat\\src\\llm.ts": {"lines":{"total":24,"covered":0,"skipped":0,"pct":0},"functions":{"total":3,"covered":0,"skipped":0,"pct":0},"statements":{"total":24,"covered":0,"skipped":0,"pct":0},"branches":{"total":26,"covered":0,"skipped":0,"pct":0}}
+,"C:\\GitHub\\Mind-o-Mat\\src\\notes-api-server.ts": {"lines":{"total":52,"covered":42,"skipped":0,"pct":80.76},"functions":{"total":14,"covered":9,"skipped":0,"pct":64.28},"statements":{"total":62,"covered":48,"skipped":0,"pct":77.41},"branches":{"total":39,"covered":30,"skipped":0,"pct":76.92}}
+,"C:\\GitHub\\Mind-o-Mat\\src\\vault-path.ts": {"lines":{"total":25,"covered":24,"skipped":0,"pct":96},"functions":{"total":4,"covered":4,"skipped":0,"pct":100},"statements":{"total":26,"covered":25,"skipped":0,"pct":96.15},"branches":{"total":18,"covered":15,"skipped":0,"pct":83.33}}
+,"C:\\GitHub\\Mind-o-Mat\\src\\cli\\index-cmd.ts": {"lines":{"total":215,"covered":47,"skipped":0,"pct":21.86},"functions":{"total":23,"covered":6,"skipped":0,"pct":26.08},"statements":{"total":245,"covered":56,"skipped":0,"pct":22.85},"branches":{"total":106,"covered":21,"skipped":0,"pct":19.81}}
+,"C:\\GitHub\\Mind-o-Mat\\src\\cli\\index.ts": {"lines":{"total":29,"covered":0,"skipped":0,"pct":0},"functions":{"total":2,"covered":0,"skipped":0,"pct":0},"statements":{"total":29,"covered":0,"skipped":0,"pct":0},"branches":{"total":17,"covered":0,"skipped":0,"pct":0}}
+,"C:\\GitHub\\Mind-o-Mat\\src\\cli\\ingest.ts": {"lines":{"total":127,"covered":0,"skipped":0,"pct":0},"functions":{"total":16,"covered":0,"skipped":0,"pct":0},"statements":{"total":139,"covered":0,"skipped":0,"pct":0},"branches":{"total":84,"covered":0,"skipped":0,"pct":0}}
+,"C:\\GitHub\\Mind-o-Mat\\src\\cli\\init-vault.ts": {"lines":{"total":78,"covered":0,"skipped":0,"pct":0},"functions":{"total":2,"covered":0,"skipped":0,"pct":0},"statements":{"total":83,"covered":0,"skipped":0,"pct":0},"branches":{"total":29,"covered":0,"skipped":0,"pct":0}}
+,"C:\\GitHub\\Mind-o-Mat\\src\\cli\\sync.ts": {"lines":{"total":57,"covered":0,"skipped":0,"pct":0},"functions":{"total":4,"covered":0,"skipped":0,"pct":0},"statements":{"total":60,"covered":0,"skipped":0,"pct":0},"branches":{"total":20,"covered":0,"skipped":0,"pct":0}}
+,"C:\\GitHub\\Mind-o-Mat\\webapp\\src\\App.tsx": {"lines":{"total":46,"covered":0,"skipped":0,"pct":0},"functions":{"total":19,"covered":0,"skipped":0,"pct":0},"statements":{"total":51,"covered":0,"skipped":0,"pct":0},"branches":{"total":51,"covered":0,"skipped":0,"pct":0}}
+,"C:\\GitHub\\Mind-o-Mat\\webapp\\src\\ClusterMap.tsx": {"lines":{"total":19,"covered":0,"skipped":0,"pct":0},"functions":{"total":7,"covered":0,"skipped":0,"pct":0},"statements":{"total":19,"covered":0,"skipped":0,"pct":0},"branches":{"total":12,"covered":0,"skipped":0,"pct":0}}
+,"C:\\GitHub\\Mind-o-Mat\\webapp\\src\\Editor.tsx": {"lines":{"total":24,"covered":0,"skipped":0,"pct":0},"functions":{"total":6,"covered":0,"skipped":0,"pct":0},"statements":{"total":26,"covered":0,"skipped":0,"pct":0},"branches":{"total":16,"covered":0,"skipped":0,"pct":0}}
+,"C:\\GitHub\\Mind-o-Mat\\webapp\\src\\EditorWithLoad.tsx": {"lines":{"total":61,"covered":0,"skipped":0,"pct":0},"functions":{"total":15,"covered":0,"skipped":0,"pct":0},"statements":{"total":66,"covered":0,"skipped":0,"pct":0},"branches":{"total":16,"covered":0,"skipped":0,"pct":0}}
+,"C:\\GitHub\\Mind-o-Mat\\webapp\\src\\RadialView.tsx": {"lines":{"total":25,"covered":0,"skipped":0,"pct":0},"functions":{"total":10,"covered":0,"skipped":0,"pct":0},"statements":{"total":27,"covered":0,"skipped":0,"pct":0},"branches":{"total":18,"covered":0,"skipped":0,"pct":0}}
+,"C:\\GitHub\\Mind-o-Mat\\webapp\\src\\landkarte.ts": {"lines":{"total":4,"covered":0,"skipped":0,"pct":0},"functions":{"total":1,"covered":0,"skipped":0,"pct":0},"statements":{"total":4,"covered":0,"skipped":0,"pct":0},"branches":{"total":3,"covered":0,"skipped":0,"pct":0}}
+,"C:\\GitHub\\Mind-o-Mat\\webapp\\src\\main.tsx": {"lines":{"total":1,"covered":0,"skipped":0,"pct":0},"functions":{"total":0,"covered":0,"skipped":0,"pct":100},"statements":{"total":1,"covered":0,"skipped":0,"pct":0},"branches":{"total":0,"covered":0,"skipped":0,"pct":100}}
+,"C:\\GitHub\\Mind-o-Mat\\webapp\\src\\note-loader.ts": {"lines":{"total":5,"covered":0,"skipped":0,"pct":0},"functions":{"total":1,"covered":0,"skipped":0,"pct":0},"statements":{"total":5,"covered":0,"skipped":0,"pct":0},"branches":{"total":2,"covered":0,"skipped":0,"pct":0}}
+,"C:\\GitHub\\Mind-o-Mat\\webapp\\src\\notes-api.ts": {"lines":{"total":15,"covered":15,"skipped":0,"pct":100},"functions":{"total":4,"covered":4,"skipped":0,"pct":100},"statements":{"total":19,"covered":18,"skipped":0,"pct":94.73},"branches":{"total":10,"covered":9,"skipped":0,"pct":90}}
+,"C:\\GitHub\\Mind-o-Mat\\webapp\\src\\sync-queue.ts": {"lines":{"total":14,"covered":13,"skipped":0,"pct":92.85},"functions":{"total":6,"covered":6,"skipped":0,"pct":100},"statements":{"total":15,"covered":14,"skipped":0,"pct":93.33},"branches":{"total":2,"covered":1,"skipped":0,"pct":50}}
+}
diff --git a/eslint-flat.log.err b/eslint-flat.log.err
new file mode 100644
index 0000000..e69de29
diff --git a/package-lock.json b/package-lock.json
index 60e346d..d9ccb93 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -19,6 +19,7 @@
         "@types/node": "^22.0.0",
         "@typescript-eslint/eslint-plugin": "^8.69.0",
         "@typescript-eslint/parser": "^8.69.0",
+        "@vitest/coverage-v8": "^5.0.0",
         "chokidar": "^5.0.0",
         "eslint": "^9.39.5",
         "eslint-config-prettier": "^10.1.8",
@@ -80,17 +81,42 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@babel/helper-string-parser": {
+      "version": "7.29.7",
+      "resolved": "https://registry.npmjs.org/@babel/helper-string-parser/-/helper-string-parser-7.29.7.tgz",
+      "integrity": "sha512-Pb5ijPrZ89GDH8223L4UP8i6QApWxs04RbPQJTeWDV0/keR2E36MeKnyr6LYmUUvqRRI+Iv87SuF1W6ErINzYw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
     "node_modules/@babel/helper-validator-identifier": {
       "version": "7.29.7",
       "resolved": "https://registry.npmjs.org/@babel/helper-validator-identifier/-/helper-validator-identifier-7.29.7.tgz",
       "integrity": "sha512-qehxGkRj55h/ff8EMaJ+cYhyaKlHIxqYDn682wQD7RNp9UujOQsHog2uS0r2vzr4pW+sXf90NeeayjcNaX3fFg==",
       "dev": true,
       "license": "MIT",
-      "peer": true,
       "engines": {
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@babel/parser": {
+      "version": "7.29.8",
+      "resolved": "https://registry.npmjs.org/@babel/parser/-/parser-7.29.8.tgz",
+      "integrity": "sha512-E8lTAYNB1KW+FH+VGJuZM1ioAx2E6oVlvQFRrf5P8ZZmsiJXYAD9vTFV7yyEURNzgh1dFqMZuO6tUwcARbqFCA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/types": "^7.29.8"
+      },
+      "bin": {
+        "parser": "bin/babel-parser.js"
+      },
+      "engines": {
+        "node": ">=6.0.0"
+      }
+    },
     "node_modules/@babel/runtime": {
       "version": "7.29.7",
       "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.29.7.tgz",
@@ -101,6 +127,30 @@
         "node": ">=6.9.0"
       }
     },
+    "node_modules/@babel/types": {
+      "version": "7.29.8",
+      "resolved": "https://registry.npmjs.org/@babel/types/-/types-7.29.8.tgz",
+      "integrity": "sha512-Vj1jF3cPfxg7OAfoI7QnVKLoILlm2JF9pnVHrX8qx7AHMiYWT+NDAA7jChlNgRS4WTLc/fD1lXLmPixluj+3Gg==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/helper-string-parser": "^7.29.7",
+        "@babel/helper-validator-identifier": "^7.29.7"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@bcoe/v8-coverage": {
+      "version": "1.0.2",
+      "resolved": "https://registry.npmjs.org/@bcoe/v8-coverage/-/v8-coverage-1.0.2.tgz",
+      "integrity": "sha512-6zABk/ECA/QYSCQ1NGiVwwbQerUCZ+TQbp64Q3AgmfNvurHH0j8TtXa1qbShXA6qqkpAj4V5W8pP6mLe1mcMqA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=18"
+      }
+    },
     "node_modules/@bramus/specificity": {
       "version": "2.4.2",
       "resolved": "https://registry.npmjs.org/@bramus/specificity/-/specificity-2.4.2.tgz",
@@ -1238,6 +1288,58 @@
         "url": "https://opencollective.com/eslint"
       }
     },
+    "node_modules/@vitest/coverage-v8": {
+      "version": "5.0.0",
+      "resolved": "https://registry.npmjs.org/@vitest/coverage-v8/-/coverage-v8-5.0.0.tgz",
+      "integrity": "sha512-toMg6PZGCIa/lQNCDoASrfb1ly4hsUKXFtFYC9kD4t78o5Y6LyNJU7AENt8eHPr3quYdxaxK7hj2mnbFfUk9NA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@bcoe/v8-coverage": "^1.0.2",
+        "@vitest/istanbul-lib-coverage": "^1.0.0",
+        "@vitest/istanbul-lib-report": "^1.0.0",
+        "ast-v8-to-istanbul": "^1.0.5",
+        "magicast": "^0.5.4",
+        "obug": "^2.1.4",
+        "std-env": "^4.2.0",
+        "tinyrainbow": "^3.1.1"
+      },
+      "funding": {
+        "url": "https://opencollective.com/vitest"
+      },
+      "peerDependencies": {
+        "@vitest/browser": "5.0.0",
+        "vitest": "5.0.0"
+      },
+      "peerDependenciesMeta": {
+        "@vitest/browser": {
+          "optional": true
+        }
+      }
+    },
+    "node_modules/@vitest/istanbul-lib-coverage": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@vitest/istanbul-lib-coverage/-/istanbul-lib-coverage-1.0.1.tgz",
+      "integrity": "sha512-k3DJZ8LhMBK9NS4SclF1ASD3OgXEWDorbIcPTRDK0/Zae6fRvu+fJRxtFdLfHsa9Y24beCdPnoNZ4LviTNstfA==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=22"
+      }
+    },
+    "node_modules/@vitest/istanbul-lib-report": {
+      "version": "1.0.1",
+      "resolved": "https://registry.npmjs.org/@vitest/istanbul-lib-report/-/istanbul-lib-report-1.0.1.tgz",
+      "integrity": "sha512-1EOLRfsTMnyAr3+kEAsP4o9dhaDlGPpD7H5iLBBeq//YpNB1VIahkPhB+eRp9N2Dkfw8oySROjE3yf9XDeaIkQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/istanbul-lib-coverage": "1.0.1"
+      },
+      "engines": {
+        "node": ">=22"
+      }
+    },
     "node_modules/@vitest/mocker": {
       "version": "5.0.0",
       "resolved": "https://registry.npmjs.org/@vitest/mocker/-/mocker-5.0.0.tgz",
@@ -1373,6 +1475,25 @@
         "node": ">=12"
       }
     },
+    "node_modules/ast-v8-to-istanbul": {
+      "version": "1.0.5",
+      "resolved": "https://registry.npmjs.org/ast-v8-to-istanbul/-/ast-v8-to-istanbul-1.0.5.tgz",
+      "integrity": "sha512-UPAgKJFSEGMWSDr3LX4tqnAb4f7KGT8O40Tyx8wbYmmZ/yn58lNCm8h3svs3eXgiGd5AXxz8NDOvXWvicq+rJA==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@jridgewell/trace-mapping": "^0.3.31",
+        "estree-walker": "^3.0.3",
+        "js-tokens": "^10.0.0"
+      }
+    },
+    "node_modules/ast-v8-to-istanbul/node_modules/js-tokens": {
+      "version": "10.0.0",
+      "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-10.0.0.tgz",
+      "integrity": "sha512-lM/UBzQmfJRo9ABXbPWemivdCW8V2G8FHaHdypQaIy523snUjog0W71ayWXTjiR+ixeMyVHN2XcpnTd/liPg/Q==",
+      "dev": true,
+      "license": "MIT"
+    },
     "node_modules/balanced-match": {
       "version": "4.0.4",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-4.0.4.tgz",
@@ -2630,6 +2751,18 @@
         "@jridgewell/sourcemap-codec": "^1.5.5"
       }
     },
+    "node_modules/magicast": {
+      "version": "0.5.4",
+      "resolved": "https://registry.npmjs.org/magicast/-/magicast-0.5.4.tgz",
+      "integrity": "sha512-llBEhWm1SacoRwgHUoQJYtwp4PBLF4faQi5TCpIGyGs9n4y5+juI0tDgyKIfpqxckRHaHzouUEph3THklWh03w==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@babel/parser": "^7.29.7",
+        "@babel/types": "^7.29.7",
+        "source-map-js": "^1.2.1"
+      }
+    },
     "node_modules/mdn-data": {
       "version": "2.27.1",
       "resolved": "https://registry.npmjs.org/mdn-data/-/mdn-data-2.27.1.tgz",
@@ -3202,6 +3335,16 @@
         "url": "https://github.com/sponsors/SuperchupuDev"
       }
     },
+    "node_modules/tinyrainbow": {
+      "version": "3.1.1",
+      "resolved": "https://registry.npmjs.org/tinyrainbow/-/tinyrainbow-3.1.1.tgz",
+      "integrity": "sha512-yau8yJdTt989Mm0Bd/236QnzEiPf2xLLTqUZRUJOo/3CB078LSwzei343DgtJVmfJKJE3TMINY1u42SQsP6mXw==",
+      "dev": true,
+      "license": "MIT",
+      "engines": {
+        "node": ">=14.0.0"
+      }
+    },
     "node_modules/tldts": {
       "version": "7.4.11",
       "resolved": "https://registry.npmjs.org/tldts/-/tldts-7.4.11.tgz",
diff --git a/package.json b/package.json
index 45e7ff9..1733062 100644
--- a/package.json
+++ b/package.json
@@ -51,6 +51,7 @@
     "@types/node": "^22.0.0",
     "@typescript-eslint/eslint-plugin": "^8.69.0",
     "@typescript-eslint/parser": "^8.69.0",
+    "@vitest/coverage-v8": "^5.0.0",
     "chokidar": "^5.0.0",
     "eslint": "^9.39.5",
     "eslint-config-prettier": "^10.1.8",
diff --git a/perf-test.log.err b/perf-test.log.err
new file mode 100644
index 0000000..e69de29
diff --git a/tests/find-similar-groups.test.ts b/tests/find-similar-groups.test.ts
new file mode 100644
index 0000000..7b5c1ea
--- /dev/null
+++ b/tests/find-similar-groups.test.ts
@@ -0,0 +1,135 @@
+// Direkter Unit-Test fuer findSimilarGroups (v0.5)
+import { describe, it, expect, beforeEach, afterEach } from 'vitest';
+import { mkdtempSync, mkdirSync, writeFileSync, rmSync } from 'node:fs';
+import { tmpdir } from 'node:os';
+import { join } from 'node:path';
+import { findSimilarGroups } from '../src/cli/index-cmd.js';
+import type { VaultNode } from '../src/cli/index-cmd.js';
+
+const vaults: string[] = [];
+afterEach(() => {
+  for (const v of vaults) rmSync(v, { recursive: true, force: true });
+});
+
+function setupVault(files: Record<string, string>): string {
+  const vault = mkdtempSync(join(tmpdir(), 'mindomat-similar-direct-'));
+  for (const d of [
+    '00_Inbox', '10_Wiki/Seiten', '01_Daily', '20_Projekte',
+    '99_System', '99_System/Skripte', '99_System/Logs', '99_System/Cache',
+  ]) {
+    mkdirSync(join(vault, d), { recursive: true });
+  }
+  for (const [rel, content] of Object.entries(files)) {
+    const full = join(vault, rel);
+    mkdirSync(join(full, '..'), { recursive: true });
+    writeFileSync(full, content);
+  }
+  return vault;
+}
+
+function node(id: string, cluster = null): VaultNode {
+  return {
+    id,
+    title: id,
+    type: 'inbox',
+    cluster,
+    status: null,
+    created: null,
+    aktualisiert: null,
+    tags: [],
+    size: 0,
+    veraltet: false,
+    contentHash: 'h',
+  };
+}
+
+describe('findSimilarGroups direkt', () => {
+  it('leere Liste: keine Gruppen', () => {
+    const vault = setupVault({});
+    vaults.push(vault);
+    const groups = findSimilarGroups(vault, [], 0.15);
+    expect(groups).toEqual([]);
+  });
+
+  it('Notiz mit zu kurzem Body wird uebersprungen', () => {
+    const vault = setupVault({
+      '01_Daily/2026-01-01_Kurz.md': '# K',
+    });
+    vaults.push(vault);
+    const n = node('01_Daily/2026-01-01_Kurz.md');
+    const groups = findSimilarGroups(vault, [n], 0.15);
+    expect(groups).toEqual([]);
+  });
+
+  it('nicht-existierende Datei wird uebersprungen', () => {
+    const vault = setupVault({});
+    vaults.push(vault);
+    const n = node('00_Inbox/2026-01-01_NichtDa.md');
+    const groups = findSimilarGroups(vault, [n], 0.15);
+    expect(groups).toEqual([]);
+  });
+
+  it('aehnliche Notizen werden gefunden (Threshold)', () => {
+    const vault = setupVault({
+      '01_Daily/2026-09-05_A.md': `---
+title: Kaffee
+---
+
+# Kaffee
+
+Jeden Morgen trinke ich Kaffee mit Milch. Stille vor dem Tag.`,
+      '01_Daily/2026-09-05_B.md': `---
+title: Kaffee Abends
+---
+
+# Kaffee
+
+Abends trinke ich Kaffee mit Hafermilch. Andere Stille.`,
+      '01_Daily/2026-09-05_Sport.md': `---
+title: Sport
+---
+
+# Sport
+
+Ich gehe joggen im Park.`,
+    });
+    vaults.push(vault);
+    const nodes = [
+      node('01_Daily/2026-09-05_A.md'),
+      node('01_Daily/2026-09-05_B.md'),
+      node('01_Daily/2026-09-05_Sport.md'),
+    ];
+    const groups = findSimilarGroups(vault, nodes, 0.15);
+    // Es sollte mindestens eine Gruppe geben (A und B sind aehnlich)
+    expect(groups.length).toBeGreaterThanOrEqual(1);
+    // Die aehnlichste Gruppe sollte A+B sein
+    const abGroup = groups.find((g) =>
+      g.nodes.some((n) => n.id.includes('_A.md')) &&
+      g.nodes.some((n) => n.id.includes('_B.md')),
+    );
+    expect(abGroup).toBeDefined();
+  });
+
+  it('Threshold filtert: hoeher = weniger Gruppen', () => {
+    const vault = setupVault({
+      '01_Daily/2026-09-05_A.md': `---
+title: Test
+---
+
+Kaffee Tee Milch Zucker`,
+      '01_Daily/2026-09-05_B.md': `---
+title: Test
+---
+
+Kaffee Tee Brot Butter`,
+    });
+    vaults.push(vault);
+    const nodes = [
+      node('01_Daily/2026-09-05_A.md'),
+      node('01_Daily/2026-09-05_B.md'),
+    ];
+    const low = findSimilarGroups(vault, nodes, 0.1);
+    const high = findSimilarGroups(vault, nodes, 0.99);
+    expect(low.length).toBeGreaterThanOrEqual(high.length);
+  });
+});
diff --git a/vitest-cov.log.err b/vitest-cov.log.err
new file mode 100644
index 0000000..c853f85
--- /dev/null
+++ b/vitest-cov.log.err
@@ -0,0 +1,4 @@
+ERROR: Coverage for lines (22.63%) does not meet global threshold (50%)
+ERROR: Coverage for functions (26.02%) does not meet global threshold (50%)
+ERROR: Coverage for statements (23.37%) does not meet global threshold (50%)
+ERROR: Coverage for branches (20.12%) does not meet global threshold (50%)
diff --git a/vitest.config.mjs b/vitest.config.mjs
index e812b4c..6139b11 100644
--- a/vitest.config.mjs
+++ b/vitest.config.mjs
@@ -1,5 +1,5 @@
 // Vitest Config
-// Phase 1.1 + 4.1 (jsdom fuer PWA-Editor-Tests)
+// Phase 1.1 + 4.1 (jsdom fuer PWA-Editor-Tests) + Bonus (Coverage)
 
 import { defineConfig } from 'vitest/config';
 
@@ -13,5 +13,17 @@ export default defineConfig({
       ['tests/**/sync-queue.test.ts', 'jsdom'],
     ],
     globals: false,
+    coverage: {
+      provider: 'v8',
+      reporter: ['text', 'json-summary'],
+      include: ['src/**/*.ts', 'webapp/src/**/*.ts', 'webapp/src/**/*.tsx'],
+      exclude: ['src/templates/**', '**/*.test.ts', '**/*.d.ts'],
+      thresholds: {
+        lines: 50,
+        functions: 50,
+        branches: 50,
+        statements: 50,
+      },
+    },
   },
 });