diff --git a/package-lock.json b/package-lock.json
index acb55058..185b0e53 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -28,7 +28,7 @@
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-        "@vitest/runner": "1.6.0",
-        "@vitest/snapshot": "1.6.0",
-        "@vitest/spy": "1.6.0",
-        "@vitest/utils": "1.6.0",
-        "acorn-walk": "^8.3.2",
-        "chai": "^4.3.10",
-        "debug": "^4.3.4",
-        "execa": "^8.0.1",
-        "local-pkg": "^0.5.0",
-        "magic-string": "^0.30.5",
-        "pathe": "^1.1.1",
-        "picocolors": "^1.0.0",
-        "std-env": "^3.5.0",
-        "strip-literal": "^2.0.0",
-        "tinybench": "^2.5.1",
-        "tinypool": "^0.8.3",
+      "version": "2.1.8",
+      "resolved": "https://registry.npmjs.org/vitest/-/vitest-2.1.8.tgz",
+      "integrity": "sha512-1vBKTZskHw/aosXqQUlVWWlGUxSJR8YtiyZDJAFeW2kPAeX6S3Sool0mjspO+kXLuxVWlEDDowBAeqeAQefqLQ==",
+      "dev": true,
+      "license": "MIT",
+      "dependencies": {
+        "@vitest/expect": "2.1.8",
+        "@vitest/mocker": "2.1.8",
+        "@vitest/pretty-format": "^2.1.8",
+        "@vitest/runner": "2.1.8",
+        "@vitest/snapshot": "2.1.8",
+        "@vitest/spy": "2.1.8",
+        "@vitest/utils": "2.1.8",
+        "chai": "^5.1.2",
+        "debug": "^4.3.7",
+        "expect-type": "^1.1.0",
+        "magic-string": "^0.30.12",
+        "pathe": "^1.1.2",
+        "std-env": "^3.8.0",
+        "tinybench": "^2.9.0",
+        "tinyexec": "^0.3.1",
+        "tinypool": "^1.0.1",
+        "tinyrainbow": "^1.2.0",
         "vite": "^5.0.0",
-        "vite-node": "1.6.0",
-        "why-is-node-running": "^2.2.2"
+        "vite-node": "2.1.8",
+        "why-is-node-running": "^2.3.0"
       },
       "bin": {
         "vitest": "vitest.mjs"
@@ -15324,8 +15257,8 @@
       "peerDependencies": {
         "@edge-runtime/vm": "*",
         "@types/node": "^18.0.0 || >=20.0.0",
-        "@vitest/browser": "1.6.0",
-        "@vitest/ui": "1.6.0",
+        "@vitest/browser": "2.1.8",
+        "@vitest/ui": "2.1.8",
         "happy-dom": "*",
         "jsdom": "*"
       },
@@ -15369,150 +15302,6 @@
         }
       }
     },
-    "node_modules/vitest/node_modules/execa": {
-      "version": "8.0.1",
-      "resolved": "https://registry.npmjs.org/execa/-/execa-8.0.1.tgz",
-      "integrity": "sha512-VyhnebXciFV2DESc+p6B+y0LjSm0krU4OgJN44qFAhBY0TJ+1V61tYD2+wHusZ6F9n5K+vl8k0sTy7PEfV4qpg==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "cross-spawn": "^7.0.3",
-        "get-stream": "^8.0.1",
-        "human-signals": "^5.0.0",
-        "is-stream": "^3.0.0",
-        "merge-stream": "^2.0.0",
-        "npm-run-path": "^5.1.0",
-        "onetime": "^6.0.0",
-        "signal-exit": "^4.1.0",
-        "strip-final-newline": "^3.0.0"
-      },
-      "engines": {
-        "node": ">=16.17"
-      },
-      "funding": {
-        "url": "https://github.com/sindresorhus/execa?sponsor=1"
-      }
-    },
-    "node_modules/vitest/node_modules/get-stream": {
-      "version": "8.0.1",
-      "resolved": "https://registry.npmjs.org/get-stream/-/get-stream-8.0.1.tgz",
-      "integrity": "sha512-VaUJspBffn/LMCJVoMvSAdmscJyS1auj5Zulnn5UoYcY531UWmdwhRWkcGKnGU93m5HSXP9LP2usOryrBtQowA==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=16"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
-    "node_modules/vitest/node_modules/human-signals": {
-      "version": "5.0.0",
-      "resolved": "https://registry.npmjs.org/human-signals/-/human-signals-5.0.0.tgz",
-      "integrity": "sha512-AXcZb6vzzrFAUE61HnN4mpLqd/cSIwNQjtNWR0euPm6y0iqx3G4gOXaIDdtdDwZmhwe82LA6+zinmW4UBWVePQ==",
-      "dev": true,
-      "license": "Apache-2.0",
-      "engines": {
-        "node": ">=16.17.0"
-      }
-    },
-    "node_modules/vitest/node_modules/is-stream": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/is-stream/-/is-stream-3.0.0.tgz",
-      "integrity": "sha512-LnQR4bZ9IADDRSkvpqMGvt/tEJWclzklNgSw48V5EAaAeDd6qGvN8ei6k5p0tvxSR171VmGyHuTiAOfxAbr8kA==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
-    "node_modules/vitest/node_modules/mimic-fn": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/mimic-fn/-/mimic-fn-4.0.0.tgz",
-      "integrity": "sha512-vqiC06CuhBTUdZH+RYl8sFrL096vA45Ok5ISO6sE/Mr1jRbGH4Csnhi8f3wKVl7x8mO4Au7Ir9D3Oyv1VYMFJw==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
-    "node_modules/vitest/node_modules/npm-run-path": {
-      "version": "5.3.0",
-      "resolved": "https://registry.npmjs.org/npm-run-path/-/npm-run-path-5.3.0.tgz",
-      "integrity": "sha512-ppwTtiJZq0O/ai0z7yfudtBpWIoxM8yE6nHi1X47eFR2EWORqfbu6CnPlNsjeN683eT0qG6H/Pyf9fCcvjnnnQ==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "path-key": "^4.0.0"
-      },
-      "engines": {
-        "node": "^12.20.0 || ^14.13.1 || >=16.0.0"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
-    "node_modules/vitest/node_modules/onetime": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/onetime/-/onetime-6.0.0.tgz",
-      "integrity": "sha512-1FlR+gjXK7X+AsAHso35MnyN5KqGwJRi/31ft6x0M194ht7S+rWAvd7PHss9xSKMzE0asv1pyIHaJYq+BbacAQ==",
-      "dev": true,
-      "license": "MIT",
-      "dependencies": {
-        "mimic-fn": "^4.0.0"
-      },
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
-    "node_modules/vitest/node_modules/path-key": {
-      "version": "4.0.0",
-      "resolved": "https://registry.npmjs.org/path-key/-/path-key-4.0.0.tgz",
-      "integrity": "sha512-haREypq7xkM7ErfgIyA0z+Bj4AGKlMSdlQE2jvJo6huWD1EdkKYV+G/T4nq0YEF2vgTT8kqMFKo1uHn950r4SQ==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
-    "node_modules/vitest/node_modules/signal-exit": {
-      "version": "4.1.0",
-      "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-4.1.0.tgz",
-      "integrity": "sha512-bzyZ1e88w9O1iNJbKnOlvYTrWPDl46O1bG0D3XInv+9tkPrxrN8jUUTiFlDkkmKWgn1M6CfIA13SuGqOa9Korw==",
-      "dev": true,
-      "license": "ISC",
-      "engines": {
-        "node": ">=14"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/isaacs"
-      }
-    },
-    "node_modules/vitest/node_modules/strip-final-newline": {
-      "version": "3.0.0",
-      "resolved": "https://registry.npmjs.org/strip-final-newline/-/strip-final-newline-3.0.0.tgz",
-      "integrity": "sha512-dOESqjYr96iWYylGObzd39EuNTa5VJxyvVAEm5Jnh7KGo75V43Hk1odPQkNDyXNmUR6k+gEiDVXnjB8HJ3crXw==",
-      "dev": true,
-      "license": "MIT",
-      "engines": {
-        "node": ">=12"
-      },
-      "funding": {
-        "url": "https://github.com/sponsors/sindresorhus"
-      }
-    },
     "node_modules/void-elements": {
       "version": "3.1.0",
       "resolved": "https://registry.npmjs.org/void-elements/-/void-elements-3.1.0.tgz",
diff --git a/package.json b/package.json
index 1f4b0333..f6352cf2 100644
--- a/package.json
+++ b/package.json
@@ -71,7 +71,7 @@
     "@diplodoc/openapi-extension": "^2.6.0",
     "@diplodoc/prettier-config": "^2.0.0",
     "@diplodoc/search-extension": "^1.1.5",
-    "@diplodoc/transform": "^4.38.2",
+    "@diplodoc/transform": "^4.40.1",
     "@diplodoc/tsconfig": "^1.0.2",
     "@gravity-ui/page-constructor": "^5.29.1",
     "@octokit/core": "4.2.4",
@@ -86,7 +86,7 @@
     "@types/shelljs": "0.8.15",
     "@types/tar-stream": "^2.2.2",
     "@types/yargs": "17.0.24",
-    "@vitest/coverage-v8": "^1.2.1",
+    "@vitest/coverage-v8": "^2.1.8",
     "ajv": "^8.11.0",
     "async": "^3.2.4",
     "axios": "^1.6.7",
@@ -111,7 +111,7 @@
     "ts-dedent": "^2.2.0",
     "typescript": "^5.4.5",
     "vite-tsconfig-paths": "^4.2.3",
-    "vitest": "^1.1.3",
+    "vitest": "^2.1.8",
     "vitest-when": "^0.5.0",
     "walk-sync": "^3.0.0"
   },
diff --git a/src/commands/build/__tests__/index.ts b/src/commands/build/__tests__/index.ts
index de093631..c9ac1baf 100644
--- a/src/commands/build/__tests__/index.ts
+++ b/src/commands/build/__tests__/index.ts
@@ -1,10 +1,11 @@
-import type {Run} from '../run';
 import type {BuildConfig, BuildRawConfig} from '..';
+import type {Mock, MockInstance} from 'vitest';
 
 import {join} from 'node:path';
-import {Mock, describe, expect, it, vi} from 'vitest';
+import {describe, expect, it, vi} from 'vitest';
 import {when} from 'vitest-when';
 import {Build} from '..';
+import {Run} from '../run';
 import {handler as originalHandler} from '../handler';
 import {withConfigUtils} from '~/config';
 
@@ -14,6 +15,7 @@ export const handler = originalHandler as Mock;
 var resolveConfig: Mock;
 
 vi.mock('shelljs');
+vi.mock('../legacy-config');
 vi.mock('../handler');
 vi.mock('../run', async (importOriginal) => {
     return {
@@ -32,8 +34,58 @@ vi.mock('~/config', async (importOriginal) => {
     };
 });
 
+const Mocked = Symbol('Mocked');
+
+export type RunSpy = Run & {
+    glob: MockInstance<Run['glob']>;
+    copy: MockInstance<Run['copy']>;
+    read: MockInstance<Run['read']>;
+    write: MockInstance<Run['write']>;
+    [Mocked]: boolean;
+};
+
+export function setupRun(config: DeepPartial<BuildConfig>, run?: Run): RunSpy {
+    run =
+        run ||
+        new Run({
+            input: '/dev/null/input',
+            output: '/dev/null/output',
+            ...config,
+        } as BuildConfig);
+
+    const stringify = (arg: unknown) => {
+        if (typeof arg === 'object' && arg) {
+            return JSON.stringify(arg);
+        }
+
+        return String(arg);
+    };
+
+    const impl =
+        (method: string) =>
+        (...args: unknown[]) => {
+            throw new Error(
+                `Method ${method} with args\n${args.map(stringify).join('\n')} not implemented.`,
+            );
+        };
+
+    for (const method of ['glob', 'copy', 'read', 'write'] as string[]) {
+        // @ts-ignore
+        vi.spyOn(run, method).mockImplementation(impl(method));
+    }
+
+    for (const method of ['proc', 'info', 'warn', 'error'] as string[]) {
+        // @ts-ignore
+        vi.spyOn(run.logger, method).mockImplementation(() => {});
+    }
+
+    (run as RunSpy)[Mocked] = true;
+
+    return run as RunSpy;
+}
+
 type BuildState = {
-    globs?: Hash<string[]>;
+    globs?: Hash<NormalizedPath[]>;
     files?: Hash<string>;
 };
 export function setupBuild(state: BuildState = {}): Build & {run: Run} {
@@ -43,21 +95,17 @@ export function setupBuild(state: BuildState = {}): Build & {run: Run} {
     build.hooks.BeforeAnyRun.tap('Tests', (run) => {
         (build as Build & {run: Run}).run = run;
 
-        // @ts-ignore
-        run.glob = vi.fn(() => []);
-        run.copy = vi.fn();
-        run.write = vi.fn();
-        run.fs.writeFile = vi.fn();
-        // @ts-ignore
-        run.fs.readFile = vi.fn();
-        // @ts-ignore
-        run.logger.proc = vi.fn();
-        // @ts-ignore
-        run.logger.info = vi.fn();
-        // @ts-ignore
-        run.logger.warn = vi.fn();
-        // @ts-ignore
-        run.logger.error = vi.fn();
+        if (!(run as RunSpy)[Mocked]) {
+            setupRun({}, run);
+        }
+
+        when(run.copy).calledWith(expect.anything(), expect.anything()).thenResolve();
+        when(run.copy)
+            .calledWith(expect.anything(), expect.anything(), expect.anything())
+            .thenResolve();
+        when(run.write).calledWith(expect.anything(), expect.anything()).thenResolve();
+        when(run.glob).calledWith('**/toc.yaml', expect.anything()).thenResolve([]);
+        when(run.glob).calledWith('**/presets.yaml', expect.anything()).thenResolve([]);
 
         if (state.globs) {
             for (const [pattern, files] of Object.entries(state.globs)) {
@@ -67,9 +115,7 @@ export function setupBuild(state: BuildState = {}): Build & {run: Run} {
 
         if (state.files) {
             for (const [file, content] of Object.entries(state.files)) {
-                when(run.fs.readFile)
-                    .calledWith(join(run.input, file), expect.anything())
-                    .thenResolve(content);
+                when(run.read).calledWith(join(run.input, file)).thenResolve(content);
             }
         }
     });
diff --git a/src/commands/build/config.ts b/src/commands/build/config.ts
index 804bf9e5..690b28c0 100644
--- a/src/commands/build/config.ts
+++ b/src/commands/build/config.ts
@@ -109,9 +109,9 @@ const staticContent = option({
 });
 
 const ignoreStage = option({
-    flags: '--ignore-stage <value>',
-    defaultInfo: Stage.SKIP,
-    desc: 'Ignore tocs with stage.',
+    flags: '--ignore-stage <value...>',
+    defaultInfo: [Stage.SKIP],
+    desc: 'Ignore tocs with selected stages.',
 });
 
 const addSystemMeta = option({
diff --git a/src/commands/build/core/meta/index.ts b/src/commands/build/core/meta/index.ts
new file mode 100644
index 00000000..a38d53a4
--- /dev/null
+++ b/src/commands/build/core/meta/index.ts
@@ -0,0 +1 @@
+export {addSourcePath} from './utils';
diff --git a/src/commands/build/core/meta/utils.ts b/src/commands/build/core/meta/utils.ts
new file mode 100644
index 00000000..b0f19dc6
--- /dev/null
+++ b/src/commands/build/core/meta/utils.ts
@@ -0,0 +1,17 @@
+import {composeFrontMatter, extractFrontMatter} from '@diplodoc/transform/lib/frontmatter';
+
+export function addSourcePath(fileContent: string, sourcePath: string) {
+    const [frontMatter, strippedContent] = extractFrontMatter(fileContent, sourcePath);
+
+    if (frontMatter.sourcePath) {
+        return fileContent;
+    }
+
+    return composeFrontMatter(
+        {
+            ...frontMatter,
+            sourcePath,
+        },
+        strippedContent,
+    );
+}
diff --git a/src/commands/build/core/vars/VarsService.ts b/src/commands/build/core/vars/VarsService.ts
index 4fee897d..9678d7ee 100644
--- a/src/commands/build/core/vars/VarsService.ts
+++ b/src/commands/build/core/vars/VarsService.ts
@@ -5,12 +5,13 @@ import {merge} from 'lodash';
 import {dump, load} from 'js-yaml';
 
 import {Run} from '~/commands/build';
-import {freeze, own} from '~/utils';
+import {freeze, normalizePath, own} from '~/utils';
 import {AsyncParallelHook, AsyncSeriesWaterfallHook} from 'tapable';
 
 export type VarsServiceConfig = {
     varsPreset: string;
     vars: Hash;
+    ignore: string[];
 };
 
 type VarsServiceHooks = {
@@ -30,9 +31,11 @@ type VarsServiceHooks = {
 export class VarsService {
     hooks: VarsServiceHooks;
 
-    private run: Run;
+    get entries() {
+        return [...Object.entries(this.cache)];
+    }
 
-    private fs: Run['fs'];
+    private run: Run;
 
     private logger: Run['logger'];
 
@@ -42,7 +45,6 @@ export class VarsService {
 
     constructor(run: Run) {
         this.run = run;
-        this.fs = run.fs;
         this.logger = run.logger;
         this.config = run.config;
         this.hooks = {
@@ -51,7 +53,20 @@ export class VarsService {
         };
     }
 
+    async init() {
+        const presets = await this.run.glob('**/presets.yaml', {
+            cwd: this.run.input,
+            ignore: this.config.ignore,
+        });
+
+        for (const preset of presets) {
+            await this.load(preset);
+        }
+    }
+
     async load(path: RelativePath) {
+        path = normalizePath(path);
+
         const varsPreset = this.config.varsPreset || 'default';
         const file = join(dirname(path), 'presets.yaml');
 
@@ -59,7 +74,7 @@ export class VarsService {
             return this.cache[file];
         }
 
-        this.logger.proc(path);
+        this.logger.proc(file);
 
         const scopes = [];
 
@@ -69,7 +84,7 @@ export class VarsService {
 
         try {
             const presets = await this.hooks.PresetsLoaded.promise(
-                load(await this.fs.readFile(join(this.run.input, file), 'utf8')) as Presets,
+                load(await this.run.read(join(this.run.input, file))) as Presets,
                 file,
             );
 
@@ -98,8 +113,4 @@ export class VarsService {
             lineWidth: 120,
         });
     }
-
-    entries() {
-        return Object.entries(this.cache);
-    }
 }
diff --git a/src/commands/build/core/vars/index.spec.ts b/src/commands/build/core/vars/index.spec.ts
index c12a68c2..d36d3c0c 100644
--- a/src/commands/build/core/vars/index.spec.ts
+++ b/src/commands/build/core/vars/index.spec.ts
@@ -1,4 +1,3 @@
-import type {Run} from '~/commands/build';
 import type {VarsServiceConfig} from './VarsService';
 
 import {join} from 'node:path';
@@ -7,6 +6,8 @@ import {when} from 'vitest-when';
 import {dedent} from 'ts-dedent';
 import {YAMLException} from 'js-yaml';
 
+import {setupRun} from '~/commands/build/__tests__';
+
 import {VarsService} from './VarsService';
 
 const ENOENT = Object.assign(new Error('ENOENT: no such file or directory'), {
@@ -15,38 +16,23 @@ const ENOENT = Object.assign(new Error('ENOENT: no such file or directory'), {
 
 type Options = Partial<VarsServiceConfig>;
 
-function prepare(content: string | Hash<string> | Error, options: Options = {}) {
-    const input = '/dev/null/input' as AbsolutePath;
-    const output = '/dev/null/output' as AbsolutePath;
-    const run = {
-        input,
-        output,
-        config: {
-            varsPreset: options.varsPreset,
-            vars: options.vars || {},
-        },
-        logger: {
-            proc: vi.fn(),
-        },
-        fs: {
-            readFile: vi.fn(),
-        },
-    } as unknown as Run;
+function prepare(content: string | Error | Hash<string | Error>, options: Options = {}) {
+    const run = setupRun({
+        varsPreset: options.varsPreset,
+        vars: options.vars || {},
+    });
+
     const service = new VarsService(run);
 
-    if (content instanceof Error) {
-        when(run.fs.readFile)
-            .calledWith(join(input, './presets.yaml'), expect.anything())
-            .thenReject(content);
-    } else {
-        if (typeof content === 'string') {
-            content = {'./presets.yaml': content};
-        }
+    if (typeof content === 'string' || content instanceof Error) {
+        content = {'./presets.yaml': content};
+    }
 
-        for (const [file, data] of Object.entries(content)) {
-            when(run.fs.readFile)
-                .calledWith(join(input, file), expect.anything())
-                .thenResolve(data);
+    for (const [file, data] of Object.entries(content)) {
+        if (data instanceof Error) {
+            when(run.read).calledWith(join(run.input, file)).thenReject(data);
+        } else {
+            when(run.read).calledWith(join(run.input, file)).thenResolve(data);
         }
     }
 
@@ -55,7 +41,7 @@ function prepare(content: string | Hash<string> | Error, options: Options = {})
 
 async function call(content: string | Error, options: Options = {}) {
     const service = prepare(content, options);
-    const result = await service.load('./presets.yaml' as RelativePath);
+    const result = await service.load('presets.yaml' as NormalizedPath);
 
     expect(service.dump(result)).toMatchSnapshot();
 }
@@ -134,44 +120,45 @@ describe('vars', () => {
                 const service = prepare(
                     {
                         './presets.yaml': dedent`
-                        default:
-                          field1: value1
-                          override1: value2
-                          override2: value2
-                          override3: value2
-                          override4: value2
-                        internal:
-                          field2: value1
-                          override1: value1
-                    `,
+                            default:
+                              field1: value1
+                              override1: value2
+                              override2: value2
+                              override3: value2
+                              override4: value2
+                            internal:
+                              field2: value1
+                              override1: value1
+                        `,
                         './subfolder/presets.yaml': dedent`
-                        default:
-                          sub1: value1
-                          sub2: value2
-                          override2: value1
-                          override5: value2
-                        internal:
-                          sub2: value1
-                          override3: value1
-                          override6: value2
-                    `,
+                            default:
+                              sub1: value1
+                              sub2: value2
+                              override2: value1
+                              override5: value2
+                            internal:
+                              sub2: value1
+                              override3: value1
+                              override6: value2
+                        `,
+                        './subfolder/subfolder/presets.yaml': ENOENT,
                         './subfolder/subfolder/subfolder/presets.yaml': dedent`
-                        default:
-                          subsub1: value2
-                          override4: value2
-                          override5: value1
-                        internal:
-                          subsub1: value1
-                          subsub2: value1
-                          override4: value1
-                          override6: value1
-                    `,
+                            default:
+                              subsub1: value2
+                              override4: value2
+                              override5: value1
+                            internal:
+                              subsub1: value1
+                              subsub2: value1
+                              override4: value1
+                              override6: value1
+                        `,
                     },
                     {varsPreset: 'internal'},
                 );
 
                 const result = await service.load(
-                    './subfolder/subfolder/subfolder/presets.yaml' as RelativePath,
+                    'subfolder/subfolder/subfolder/presets.yaml' as NormalizedPath,
                 );
 
                 expect(service.dump(result)).toMatchSnapshot();
@@ -187,7 +174,7 @@ describe('vars', () => {
 
                 service.hooks.PresetsLoaded.tap('Test', spy);
 
-                await service.load('./presets.yaml' as RelativePath);
+                await service.load('presets.yaml' as NormalizedPath);
 
                 expect(spy).toHaveBeenCalledWith({default: {field1: 'value1'}}, 'presets.yaml');
             });
@@ -202,7 +189,7 @@ describe('vars', () => {
 
                 service.hooks.Resolved.tap('Test', spy);
 
-                await service.load('./presets.yaml' as RelativePath);
+                await service.load('presets.yaml' as NormalizedPath);
 
                 expect(spy).toHaveBeenCalledWith({field1: 'value1'}, 'presets.yaml');
             });
@@ -219,7 +206,7 @@ describe('vars', () => {
                     return presets;
                 });
 
-                const result = await service.load('./presets.yaml' as RelativePath);
+                const result = await service.load('presets.yaml' as NormalizedPath);
 
                 expect(service.dump(result)).toMatchSnapshot();
             });
@@ -236,7 +223,7 @@ describe('vars', () => {
                     return presets;
                 });
 
-                const result = await service.load('./presets.yaml' as RelativePath);
+                const result = await service.load('presets.yaml' as NormalizedPath);
 
                 expect(service.dump(result)).toMatchSnapshot();
             });
@@ -252,7 +239,7 @@ describe('vars', () => {
                 });
 
                 await expect(() =>
-                    service.load('./presets.yaml' as RelativePath),
+                    service.load('presets.yaml' as NormalizedPath),
                 ).rejects.toThrow();
             });
 
@@ -267,7 +254,7 @@ describe('vars', () => {
                 });
 
                 await expect(() =>
-                    service.load('./presets.yaml' as RelativePath),
+                    service.load('presets.yaml' as NormalizedPath),
                 ).rejects.toThrow();
             });
 
@@ -283,8 +270,8 @@ describe('vars', () => {
                 service.hooks.PresetsLoaded.tap('Test', spy1);
                 service.hooks.Resolved.tap('Test', spy2);
 
-                await service.load('./presets.yaml' as RelativePath);
-                await service.load('./presets.yaml' as RelativePath);
+                await service.load('presets.yaml' as NormalizedPath);
+                await service.load('presets.yaml' as NormalizedPath);
 
                 expect(spy1).toHaveBeenCalledOnce();
                 expect(spy2).toHaveBeenCalledOnce();
diff --git a/src/commands/build/errors/InsecureAccessError.ts b/src/commands/build/errors/InsecureAccessError.ts
new file mode 100644
index 00000000..921fec89
--- /dev/null
+++ b/src/commands/build/errors/InsecureAccessError.ts
@@ -0,0 +1,19 @@
+export class InsecureAccessError extends Error {
+    readonly realpath: AbsolutePath;
+
+    readonly realstack: AbsolutePath[];
+
+    constructor(file: AbsolutePath, stack?: AbsolutePath[]) {
+        const message = [
+            `Requested file '${file}' is out of project scope.`,
+            stack && 'File resolution stack:\n\t' + stack.join('\n\t'),
+        ]
+            .filter(Boolean)
+            .join('\n');
+
+        super(message);
+
+        this.realpath = file;
+        this.realstack = stack || [];
+    }
+}
diff --git a/src/commands/build/errors/index.ts b/src/commands/build/errors/index.ts
new file mode 100644
index 00000000..ca6b1c2e
--- /dev/null
+++ b/src/commands/build/errors/index.ts
@@ -0,0 +1 @@
+export {InsecureAccessError} from './InsecureAccessError';
diff --git a/src/commands/build/features/linter/index.ts b/src/commands/build/features/linter/index.ts
index 6cb3a405..dc398bb3 100644
--- a/src/commands/build/features/linter/index.ts
+++ b/src/commands/build/features/linter/index.ts
@@ -1,7 +1,7 @@
 import type {Build} from '../..';
 import type {Command} from '~/config';
 
-import {resolve} from 'path';
+import {resolve} from 'node:path';
 import shell from 'shelljs';
 import {LogLevels} from '@diplodoc/transform/lib/log';
 
diff --git a/src/commands/build/features/templating/index.spec.ts b/src/commands/build/features/templating/index.spec.ts
index ff220f81..a1c3edfc 100644
--- a/src/commands/build/features/templating/index.spec.ts
+++ b/src/commands/build/features/templating/index.spec.ts
@@ -217,7 +217,7 @@ describe('Build template feature', () => {
         it('should not save presets.yaml for html build', async () => {
             const build = setupBuild({
                 globs: {
-                    '**/presets.yaml': ['./presets.yaml'],
+                    '**/presets.yaml': ['presets.yaml'] as NormalizedPath[],
                 },
                 files: {
                     './presets.yaml': dedent`
@@ -238,7 +238,7 @@ describe('Build template feature', () => {
         it('should save presets.yaml for md build with disabled templating', async () => {
             const build = setupBuild({
                 globs: {
-                    '**/presets.yaml': ['./presets.yaml'],
+                    '**/presets.yaml': ['presets.yaml'] as NormalizedPath[],
                 },
                 files: {
                     './presets.yaml': dedent`
@@ -259,7 +259,7 @@ describe('Build template feature', () => {
         it('should filter presets.yaml for md build with disabled templating', async () => {
             const build = setupBuild({
                 globs: {
-                    '**/presets.yaml': ['./presets.yaml'],
+                    '**/presets.yaml': ['presets.yaml'] as NormalizedPath[],
                 },
                 files: {
                     './presets.yaml': dedent`
diff --git a/src/commands/build/handler.ts b/src/commands/build/handler.ts
index abe17161..90dfe68a 100644
--- a/src/commands/build/handler.ts
+++ b/src/commands/build/handler.ts
@@ -28,15 +28,13 @@ export async function handler(run: Run) {
         const {lintDisabled, buildDisabled, addMapFile} = ArgvService.getConfig();
 
         PresetService.init(run.vars);
-        await preparingTocFiles(run);
+        await preparingTocFiles();
         processExcludedFiles();
 
         if (addMapFile) {
             prepareMapFile();
         }
 
-        const outputBundlePath = run.bundlePath;
-
         if (!lintDisabled) {
             /* Initialize workers in advance to avoid a timeout failure due to not receiving a message from them */
             await initLinterWorkers();
@@ -44,7 +42,7 @@ export async function handler(run: Run) {
 
         const processes = [
             !lintDisabled && processLinter(),
-            !buildDisabled && processPages(outputBundlePath),
+            !buildDisabled && processPages(run),
         ].filter(Boolean) as Promise<void>[];
 
         await Promise.all(processes);
diff --git a/src/commands/build/index.spec.ts b/src/commands/build/index.spec.ts
index 45b90235..622595dc 100644
--- a/src/commands/build/index.spec.ts
+++ b/src/commands/build/index.spec.ts
@@ -194,22 +194,33 @@ describe('Build command', () => {
 
         describe('ignoreStage', () => {
             test('should handle default', '', {
-                ignoreStage: 'skip',
+                ignoreStage: ['skip'],
             });
 
             test('should handle arg', '--ignore-stage preview', {
-                ignoreStage: 'preview',
+                ignoreStage: ['preview'],
             });
 
             test(
                 'should handle config',
                 '',
                 {
-                    ignoreStage: 'preview',
+                    ignoreStage: ['preview'],
                 },
+                {
+                    ignoreStage: ['preview'],
+                },
+            );
+
+            test(
+                'should handle simplified config',
+                '',
                 {
                     ignoreStage: 'preview',
                 },
+                {
+                    ignoreStage: ['preview'],
+                },
             );
         });
 
diff --git a/src/commands/build/index.ts b/src/commands/build/index.ts
index acfe3472..dec4df1d 100644
--- a/src/commands/build/index.ts
+++ b/src/commands/build/index.ts
@@ -26,6 +26,9 @@ import {Changelogs, ChangelogsArgs, ChangelogsConfig} from './features/changelog
 import {Search, SearchArgs, SearchConfig, SearchRawConfig} from './features/search';
 import {Legacy, LegacyArgs, LegacyConfig, LegacyRawConfig} from './features/legacy';
 import shell from 'shelljs';
+import {intercept} from '~/utils';
+
+export type * from './types';
 
 export enum ResourceType {
     style = 'style',
@@ -49,8 +52,7 @@ type BaseConfig = {
     vars: Hash;
     allowHtml: boolean;
     sanitizeHtml: boolean;
-    // TODO(minor): string[]
-    ignoreStage: string;
+    ignoreStage: string[];
     ignore: string[];
     addSystemMeta: boolean;
     // TODO(minor): we can generate this file all time
@@ -72,39 +74,40 @@ export type {Run};
 
 const command = 'Build';
 
-const hooks = () => ({
-    /**
-     * Async series hook which runs before start of any Run type.<br/><br/>
-     * Args:
-     * - run - [Build.Run](./Run.ts) constructed context.<br/>
-     * Best place to subscribe on Run hooks.
-     */
-    BeforeAnyRun: new AsyncSeriesHook<Run>(['run'], `${command}.BeforeAnyRun`),
-    /**
-     * Async series hook map which runs before start of target Run type.<br/><br/>
-     * Args:
-     * - run - [Build.Run](./Run.ts) constructed context.<br/>
-     * Best place to subscribe on target Run hooks.
-     */
-    BeforeRun: new HookMap(
-        (format: `${OutputFormat}`) =>
-            new AsyncSeriesHook<Run>(['run'], `${command}.${format}.BeforeRun`),
-    ),
-    /**
-     * Async parallel hook which runs on start of any Run type.<br/><br/>
-     * Args:
-     * - run - [Build.Run](./Run.ts) constructed context.<br/>
-     * Best place to do something in parallel with main build process.
-     */
-    Run: new AsyncParallelHook<Run>(['run'], `${command}.Run`),
-    // TODO: decompose handler and describe this hook
-    AfterRun: new HookMap(
-        (format: `${OutputFormat}`) =>
-            new AsyncSeriesHook<Run>(['run'], `${command}.${format}.AfterRun`),
-    ),
-    // TODO: decompose handler and describe this hook
-    AfterAnyRun: new AsyncSeriesHook<Run>(['run'], `${command}.AfterAnyRun`),
-});
+const hooks = () =>
+    intercept(command, {
+        /**
+         * Async series hook which runs before start of any Run type.<br/><br/>
+         * Args:
+         * - run - [Build.Run](./Run.ts) constructed context.<br/>
+         * Best place to subscribe on Run hooks.
+         */
+        BeforeAnyRun: new AsyncSeriesHook<Run>(['run'], `${command}.BeforeAnyRun`),
+        /**
+         * Async series hook map which runs before start of target Run type.<br/><br/>
+         * Args:
+         * - run - [Build.Run](./Run.ts) constructed context.<br/>
+         * Best place to subscribe on target Run hooks.
+         */
+        BeforeRun: new HookMap(
+            (format: `${OutputFormat}`) =>
+                new AsyncSeriesHook<Run>(['run'], `${command}.${format}.BeforeRun`),
+        ),
+        /**
+         * Async parallel hook which runs on start of any Run type.<br/><br/>
+         * Args:
+         * - run - [Build.Run](./Run.ts) constructed context.<br/>
+         * Best place to do something in parallel with main build process.
+         */
+        Run: new AsyncParallelHook<Run>(['run'], `${command}.Run`),
+        // TODO: decompose handler and describe this hook
+        AfterRun: new HookMap(
+            (format: `${OutputFormat}`) =>
+                new AsyncSeriesHook<Run>(['run'], `${command}.${format}.AfterRun`),
+        ),
+        // TODO: decompose handler and describe this hook
+        AfterAnyRun: new AsyncSeriesHook<Run>(['run'], `${command}.AfterAnyRun`),
+    });
 
 export type BuildArgs = ProgramArgs &
     BaseArgs &
@@ -164,7 +167,7 @@ export class Build
                     resources: [],
                     allowCustomResources: false,
                     staticContent: false,
-                    ignoreStage: Stage.SKIP,
+                    ignoreStage: [Stage.SKIP],
                     addSystemMeta: false,
                     buildDisabled: false,
                     lint: {enabled: true, config: {'log-levels': {}}},
@@ -219,6 +222,7 @@ export class Build
 
     apply(program?: IProgram) {
         this.hooks.Config.tap('Build', (config, args) => {
+            const ignoreStage = defined('ignoreStage', args, config) || [];
             const langs = defined('langs', args, config) || [];
             const lang = defined('lang', config);
 
@@ -243,6 +247,7 @@ export class Build
 
             Object.assign(config, pick(args, options));
 
+            config.ignoreStage = [].concat(ignoreStage);
             config.langs = langs;
             config.lang = lang || langs[0];
 
@@ -268,7 +273,7 @@ export class Build
     }
 
     async action() {
-        if (typeof VERSION !== 'undefined') {
+        if (typeof VERSION !== 'undefined' && process.env.NODE_ENV !== 'test') {
             console.log(`Using v${VERSION} version`);
         }
 
@@ -285,13 +290,7 @@ export class Build
 
         await run.copy(run.originalInput, run.input, ['node_modules/**', '*/node_modules/**']);
 
-        const presets = (await run.glob('**/presets.yaml', {
-            cwd: run.input,
-            ignore: run.config.ignore,
-        })) as RelativePath[];
-        for (const preset of presets) {
-            await run.vars.load(preset);
-        }
+        await run.vars.init();
 
         await Promise.all([handler(run), this.hooks.Run.promise(run)]);
 
diff --git a/src/commands/build/legacy-config.ts b/src/commands/build/legacy-config.ts
new file mode 100644
index 00000000..7a9e0087
--- /dev/null
+++ b/src/commands/build/legacy-config.ts
@@ -0,0 +1,54 @@
+import type {Run} from '.';
+import type {YfmArgv} from '~/models';
+
+export function legacyConfig(run: Run): YfmArgv {
+    const {config} = run;
+
+    return {
+        rootInput: run.originalInput,
+        input: run.input,
+        output: run.output,
+        quiet: config.quiet,
+        addSystemMeta: config.addSystemMeta,
+        addMapFile: config.addMapFile,
+        staticContent: config.staticContent,
+        strict: config.strict,
+        langs: config.langs,
+        lang: config.lang,
+        ignoreStage: config.ignoreStage[0],
+        singlePage: config.singlePage,
+        removeHiddenTocItems: config.removeHiddenTocItems,
+        allowCustomResources: config.allowCustomResources,
+        resources: config.resources,
+        analytics: config.analytics,
+        varsPreset: config.varsPreset,
+        vars: config.vars,
+        outputFormat: config.outputFormat,
+        allowHTML: config.allowHtml,
+        needToSanitizeHtml: config.sanitizeHtml,
+        useLegacyConditions: config.useLegacyConditions,
+
+        ignore: config.ignore,
+
+        applyPresets: config.template.features.substitutions,
+        resolveConditions: config.template.features.conditions,
+        conditionsInCode: config.template.scopes.code,
+        disableLiquid: !config.template.enabled,
+
+        buildDisabled: config.buildDisabled,
+
+        lintDisabled: !config.lint.enabled,
+        // @ts-ignore
+        lintConfig: config.lint.config,
+
+        vcs: config.vcs,
+        connector: config.vcs.connector,
+        contributors: config.contributors,
+        ignoreAuthorPatterns: config.ignoreAuthorPatterns,
+
+        changelogs: config.changelogs,
+        search: config.search,
+
+        included: config.mergeIncludes,
+    };
+}
diff --git a/src/commands/build/run.ts b/src/commands/build/run.ts
index f563df66..25d1be57 100644
--- a/src/commands/build/run.ts
+++ b/src/commands/build/run.ts
@@ -1,11 +1,12 @@
 import type {YfmArgv} from '~/models';
-import type {GlobOptions} from 'glob';
+import type {BuildConfig} from '.';
 
-// import {ok} from 'node:assert';
-import {dirname, join, resolve} from 'node:path';
-import {access, link, mkdir, readFile, stat, unlink, writeFile} from 'node:fs/promises';
+import {ok} from 'node:assert';
+import {dirname, join, relative, resolve} from 'node:path';
+import {access, link, mkdir, readFile, realpath, stat, unlink, writeFile} from 'node:fs/promises';
 import {glob} from 'glob';
 
+import {bounded, normalizePath} from '~/utils';
 import {configPath} from '~/config';
 import {
     BUNDLE_FOLDER,
@@ -15,13 +16,15 @@ import {
     YFM_CONFIG_FILENAME,
 } from '~/constants';
 import {LogLevel, Logger} from '~/logger';
-import {BuildConfig} from '.';
-// import {InsecureAccessError} from './errors';
+import {legacyConfig} from './legacy-config';
+import {InsecureAccessError} from './errors';
 import {VarsService} from './core/vars';
+import {addSourcePath} from './core/meta';
 
 type FileSystem = {
     access: typeof access;
     stat: typeof stat;
+    realpath: typeof realpath;
     link: typeof link;
     unlink: typeof unlink;
     mkdir: typeof mkdir;
@@ -29,8 +32,19 @@ type FileSystem = {
     writeFile: typeof writeFile;
 };
 
+type GlobOptions = {
+    cwd?: AbsolutePath;
+    ignore?: string[];
+};
+
+type CopyOptions = {
+    ignore?: string[];
+    sourcePath?: (path: string) => boolean;
+};
+
 class RunLogger extends Logger {
     proc = this.topic(LogLevel.INFO, 'PROC');
+    copy = this.topic(LogLevel.INFO, 'COPY');
 }
 
 /**
@@ -52,7 +66,7 @@ export class Run {
 
     readonly config: BuildConfig;
 
-    readonly fs: FileSystem = {access, stat, link, unlink, mkdir, readFile, writeFile};
+    readonly fs: FileSystem = {access, stat, realpath, link, unlink, mkdir, readFile, writeFile};
 
     readonly vars: VarsService;
 
@@ -85,71 +99,77 @@ export class Run {
         ]);
 
         this.vars = new VarsService(this);
-        this.legacyConfig = {
-            rootInput: this.originalInput,
-            input: this.input,
-            output: this.output,
-            quiet: config.quiet,
-            addSystemMeta: config.addSystemMeta,
-            addMapFile: config.addMapFile,
-            staticContent: config.staticContent,
-            strict: config.strict,
-            langs: config.langs,
-            lang: config.lang,
-            ignoreStage: config.ignoreStage,
-            singlePage: config.singlePage,
-            removeHiddenTocItems: config.removeHiddenTocItems,
-            allowCustomResources: config.allowCustomResources,
-            resources: config.resources,
-            analytics: config.analytics,
-            varsPreset: config.varsPreset,
-            vars: config.vars,
-            outputFormat: config.outputFormat,
-            allowHTML: config.allowHtml,
-            needToSanitizeHtml: config.sanitizeHtml,
-            useLegacyConditions: config.useLegacyConditions,
-
-            ignore: config.ignore,
-
-            applyPresets: config.template.features.substitutions,
-            resolveConditions: config.template.features.conditions,
-            conditionsInCode: config.template.scopes.code,
-            disableLiquid: !config.template.enabled,
-
-            buildDisabled: config.buildDisabled,
-
-            lintDisabled: !config.lint.enabled,
-            // @ts-ignore
-            lintConfig: config.lint.config,
-
-            vcs: config.vcs,
-            connector: config.vcs.connector,
-            contributors: config.contributors,
-            ignoreAuthorPatterns: config.ignoreAuthorPatterns,
-
-            changelogs: config.changelogs,
-            search: config.search,
-
-            included: config.mergeIncludes,
-        };
+        this.legacyConfig = legacyConfig(this);
     }
 
-    write = async (path: AbsolutePath, content: string | Buffer) => {
+    /**
+     * Run.input bounded read helper
+     *
+     * Asserts file path is in project scope.
+     *
+     * @throws {InsecureAccessError}
+     * @param {AbsolutePath} path - unixlike absolute path to file
+     *
+     * @returns {Promise<string>}
+     */
+    @bounded async read(path: AbsolutePath) {
+        this.assertProjectScope(path);
+
+        return this.fs.readFile(path, 'utf8');
+    }
+
+    /**
+     * Run.input bounded write helper.
+     *
+     * Asserts file path is in project scope.
+     * Drops hardlinks (unlink before write).
+     * Creates directory for file.
+     *
+     * @param {AbsolutePath} path - unixlike absolute path to file
+     * @param {string} content - file content
+     *
+     * @returns {Promise<void>}
+     */
+    @bounded async write(path: AbsolutePath, content: string) {
+        this.assertProjectScope(path);
+
         await this.fs.mkdir(dirname(path), {recursive: true});
         await this.fs.unlink(path).catch(() => {});
         await this.fs.writeFile(path, content, 'utf8');
-    };
+    }
 
-    glob = async (pattern: string | string[], options: GlobOptions) => {
-        return glob(pattern, {
+    /**
+     * Glob wrapper with some default settings
+     *
+     * @param {string | string[]} pattern
+     * @param {GlobOptions} options
+     *
+     * @returns {NormalizedPath[]}
+     */
+    @bounded async glob(
+        pattern: string | string[],
+        options: GlobOptions,
+    ): Promise<NormalizedPath[]> {
+        const paths = await glob(pattern, {
             dot: true,
             nodir: true,
             follow: true,
             ...options,
         });
-    };
 
-    copy = async (from: AbsolutePath, to: AbsolutePath, ignore?: string[]) => {
+        return paths.map(normalizePath);
+    }
+
+    @bounded async copy(
+        from: AbsolutePath,
+        to: AbsolutePath,
+        options: CopyOptions | CopyOptions['ignore'] = {},
+    ) {
+        if (Array.isArray(options)) {
+            options = {ignore: options};
+        }
+
+        const {ignore, sourcePath} = options;
         const isFile = (await this.fs.stat(from)).isFile();
         const hardlink = async (from: AbsolutePath, to: AbsolutePath) => {
             // const realpath = this.realpath(from);
@@ -184,17 +204,48 @@ export class Run {
                 dirs.add(dir);
             }
 
-            await hardlink(join(from, file), join(to, file));
+            this.logger.copy(join(from, file), join(to, file));
+
+            if (sourcePath) {
+                const content = await this.read(join(from, file));
+                this.write(
+                    join(to, file),
+                    addSourcePath(content, relative(this.input, join(from, file))),
+                );
+            } else {
+                await hardlink(join(from, file), join(to, file));
+            }
         }
-    };
+    }
 
-    realpath = (path: AbsolutePath): AbsolutePath[] => {
+    realpath(path: AbsolutePath): Promise<AbsolutePath[]>;
+    realpath(path: AbsolutePath, withStack: true): Promise<AbsolutePath[]>;
+    realpath(path: AbsolutePath, withStack: false): Promise<AbsolutePath>;
+    @bounded async realpath(path: AbsolutePath, withStack = true) {
         const stack = [path];
         while (this._copyMap[path]) {
             path = this._copyMap[path];
             stack.unshift(path);
         }
 
-        return stack;
-    };
+        try {
+            const realpath = await this.fs.realpath(stack[0]);
+
+            if (realpath !== stack[0]) {
+                stack.unshift(realpath);
+            }
+        } catch {}
+
+        return withStack ? stack : stack[0];
+    }
+
+    private async assertProjectScope(path: AbsolutePath) {
+        const realpath = await this.realpath(path);
+        const isInScope =
+            realpath[0].startsWith(this.originalInput) ||
+            realpath[0].startsWith(this.originalOutput) ||
+            realpath[0].startsWith(this.input) ||
+            realpath[0].startsWith(this.output);
+        ok(isInScope, new InsecureAccessError(path, realpath));
+    }
 }
diff --git a/src/commands/build/types.ts b/src/commands/build/types.ts
new file mode 100644
index 00000000..cd567f4a
--- /dev/null
+++ b/src/commands/build/types.ts
@@ -0,0 +1 @@
+export type * from './core/vars';
diff --git a/src/globals.d.ts b/src/globals.d.ts
index 474aaea4..3ea9d4c7 100644
--- a/src/globals.d.ts
+++ b/src/globals.d.ts
@@ -8,24 +8,44 @@ type DeepPartial<T> = {
 };
 
 type UnresolvedPath = string & {
-    __type: 'unresolved';
-};
-
-type AbsolutePath = string & {
-    __type: 'absolute';
-};
-
-type RelativePath = string & {
-    __type: 'relative';
+    __type: 'path';
+    __mode: 'unresolved';
 };
 
+type AbsolutePath = string &
+    (
+        | {
+              __type: 'path';
+              __mode: 'absolute';
+          }
+        | `/${string}`
+    );
+
+type RelativePath = string &
+    (
+        | {
+              __type: 'path';
+              __mode: 'relative';
+          }
+        | `./${string}`
+    );
+
+/**
+ * This is unix-like relative path with truncated heading ./
+ */
 type NormalizedPath = string & {
-    __type: 'normalized';
+    __type: 'path';
+    __mode: 'relative' & 'normalized';
 };
 
 type AnyPath = string | UnresolvedPath | AbsolutePath | RelativePath | NormalizedPath;
 
-declare module 'path' {
+type URIString = string & {
+    __type: 'uri';
+    __mode: 'normalized';
+};
+
+declare module 'node:path' {
     namespace path {
         interface PlatformPath extends PlatformPath {
             normalize<T extends AnyPath>(path: T): T;
@@ -43,9 +63,25 @@ declare module 'path' {
             basename(path: AnyPath, suffix?: string): RelativePath;
 
             extname(path: AnyPath): string;
+
+            sep: string;
         }
     }
 
     const path: path.PlatformPath;
     export = path;
 }
+
+declare module 'node:fs/promises' {
+    import {BufferEncoding, ObjectEncodingOptions} from 'node:fs';
+
+    export function readFile(
+        path: AbsolutePath,
+        options: ObjectEncodingOptions | BufferEncoding,
+    ): Promise<string>;
+
+    export function realpath(
+        path: AbsolutePath,
+        options?: ObjectEncodingOptions | BufferEncoding | null,
+    ): Promise<AbsolutePath>;
+}
diff --git a/src/index.ts b/src/index.ts
index 12fed307..b6bd580d 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,3 +1,5 @@
+import type {HookMeta} from './utils';
+
 import {MAIN_TIMER_ID} from '~/constants';
 
 export type {ICallable, IProgram, ProgramConfig, ProgramArgs} from './program';
@@ -7,6 +9,7 @@ export type {Config, OptionInfo} from './config';
 export {Command, option} from './config';
 
 import {Program} from './program';
+import {own} from './utils';
 
 if (require.main === module) {
     (async () => {
@@ -21,16 +24,25 @@ if (require.main === module) {
         } catch (error: any) {
             exitCode = 1;
 
-            const message = error?.message || error;
+            if (own<HookMeta>(error, 'hook')) {
+                const {service, hook, name} = error.hook;
+                // eslint-disable-next-line no-console
+                console.error(
+                    `Intercept error for ${service}.${hook} hook from ${name} extension.`,
+                );
+            }
 
+            const message = error?.message || error;
             if (message) {
                 // eslint-disable-next-line no-console
                 console.error(error.message || error);
             }
         }
 
-        // eslint-disable-next-line no-console
-        console.timeEnd(MAIN_TIMER_ID);
+        if (process.env.NODE_ENV !== 'test') {
+            // eslint-disable-next-line no-console
+            console.timeEnd(MAIN_TIMER_ID);
+        }
 
         process.exit(exitCode);
     })();
diff --git a/src/logger/index.ts b/src/logger/index.ts
index 43fa6e77..79837ae2 100644
--- a/src/logger/index.ts
+++ b/src/logger/index.ts
@@ -30,11 +30,6 @@ type LoggerOptions = Readonly<{
     quiet: boolean;
 }>;
 
-type MessageInfo = {
-    level: LogLevels;
-    message: string;
-};
-
 type Color = typeof red;
 
 const Write = Symbol('write');
@@ -95,8 +90,6 @@ export class Logger implements LogConsumer {
 
     private consumer: LogConsumer | null = null;
 
-    private buffer: MessageInfo[] = [];
-
     private filters: ((level: LogLevels, message: string) => string)[];
 
     constructor(
@@ -120,6 +113,9 @@ export class Logger implements LogConsumer {
      * So if child and parent has the same topic with name 'proc',
      * only local topic will be applied to message.
      * Message will be decorated by local topic and will be passed to parent as raw string.
+     *
+     * @param {LogConsumer} consumer - parent logger
+     * @returns {Logger}
      */
     pipe(consumer: LogConsumer) {
         if (this.consumer && this.consumer !== consumer) {
@@ -128,18 +124,17 @@ export class Logger implements LogConsumer {
 
         this.consumer = consumer;
 
-        for (const {level, message} of this.buffer) {
-            this.consumer[Symbol.for(level) as keyof LogConsumer](message);
-        }
-
-        this.buffer.length = 0;
-
         return this;
     }
 
     /**
      * Defines new write decorator to one of defined log channeld.
      * Each decorator adds colored prefix to messages and apply preconfigured filters.
+     *
+     * @param {LogLevels} level
+     * @param {string} prefix - any bounded text prefix, which will be colored
+     * @param {Color} [color] - prefix color
+     * @returns new topic
      */
     topic(level: LogLevels, prefix: string, color?: Color) {
         const channel = Symbol.for(level) as keyof LogConsumer;
@@ -177,14 +172,7 @@ export class Logger implements LogConsumer {
         return this;
     }
 
-    clear() {
-        this.buffer.length = 0;
-
-        return this;
-    }
-
     reset() {
-        this.clear();
         for (const level of Object.values(LogLevel)) {
             this[level].count = 0;
         }
@@ -200,6 +188,7 @@ export class Logger implements LogConsumer {
         if (this.consumer) {
             this.consumer[Symbol.for(level) as keyof LogConsumer](message);
         } else {
+            // eslint-disable-next-line no-console
             console[level](message);
         }
     }
diff --git a/src/models.ts b/src/models.ts
index 16680fd5..cf35ab10 100644
--- a/src/models.ts
+++ b/src/models.ts
@@ -108,8 +108,6 @@ export interface YfmArgv extends YfmConfig {
 export type DocPreset = {
     default: YfmPreset;
     [varsPreset: string]: YfmPreset;
-} & {
-    __metadata: Record<string, string>[];
 };
 
 export interface YfmTocLabel extends Filter {
@@ -124,14 +122,12 @@ export interface YfmToc extends Filter {
     items: YfmToc[];
     stage?: Stage;
     base?: string;
-    deepBase?: number;
     title?: TextItems;
     include?: YfmTocInclude;
     id?: string;
     singlePage?: boolean;
     hidden?: boolean;
     label?: YfmTocLabel[] | YfmTocLabel;
-    root?: YfmToc;
 }
 
 export interface YfmTocInclude {
@@ -268,12 +264,12 @@ export interface ResolverOptions {
 
 export interface PathData {
     pathToFile: string;
-    resolvedPathToFile: string;
+    resolvedPathToFile: AbsolutePath;
     filename: string;
     fileBaseName: string;
     fileExtension: string;
-    outputDir: string;
-    outputPath: string;
+    outputDir: AbsolutePath;
+    outputPath: AbsolutePath;
     outputFormat: string;
     outputBundlePath: string;
     outputTocDir: string;
diff --git a/src/pages/redirect.ts b/src/pages/redirect.ts
index 21e8f63d..fefc252c 100644
--- a/src/pages/redirect.ts
+++ b/src/pages/redirect.ts
@@ -1,10 +1,10 @@
 import {join} from 'path';
-import {BUNDLE_FOLDER, Lang, RTL_LANGS} from '../constants';
+import {BUNDLE_FOLDER, RTL_LANGS} from '../constants';
 import {PluginService} from '../services';
 
 import manifest from '@diplodoc/client/manifest';
 
-export function generateStaticRedirect(lang: Lang, link: string): string {
+export function generateStaticRedirect(lang: string, link: string): string {
     const isRTL = RTL_LANGS.includes(lang);
 
     return `
diff --git a/src/services/metadata/addSourcePath.ts b/src/services/metadata/addSourcePath.ts
deleted file mode 100644
index 2bad3a82..00000000
--- a/src/services/metadata/addSourcePath.ts
+++ /dev/null
@@ -1,19 +0,0 @@
-import {
-    emplaceFrontMatter,
-    separateAndExtractFrontMatter,
-} from '@diplodoc/transform/lib/frontmatter';
-import {normalizeLineEndings} from './utils';
-
-export const addSourcePath = (fileContent: string, sourcePath: string) => {
-    const {frontMatter, frontMatterStrippedContent} = separateAndExtractFrontMatter(
-        fileContent,
-        sourcePath,
-    );
-
-    return normalizeLineEndings(
-        emplaceFrontMatter(frontMatterStrippedContent, {
-            ...frontMatter,
-            sourcePath,
-        }),
-    );
-};
diff --git a/src/services/metadata/enrich.ts b/src/services/metadata/enrich.ts
index 44aefa44..30b5c94d 100644
--- a/src/services/metadata/enrich.ts
+++ b/src/services/metadata/enrich.ts
@@ -1,12 +1,9 @@
+import type {FrontMatter} from '@diplodoc/transform/lib/frontmatter';
+
 import {MetaDataOptions, VarsMetadata} from '../../models';
 import {mergeFrontMatter} from './mergeMetadata';
-import {FrontMatter} from '@diplodoc/transform/lib/frontmatter/common';
 import {resolveVCSFrontMatter} from './vcsMetadata';
-import {
-    emplaceFrontMatter,
-    separateAndExtractFrontMatter,
-} from '@diplodoc/transform/lib/frontmatter';
-import {normalizeLineEndings} from './utils';
+import {composeFrontMatter, extractFrontMatter} from '@diplodoc/transform/lib/frontmatter';
 
 type FrontMatterVars = {
     metadataVars?: VarsMetadata;
@@ -35,10 +32,7 @@ export const enrichWithFrontMatter = async ({
     const {systemVars, metadataVars} = resolvedFrontMatterVars;
     const {resources, addSystemMeta, shouldAlwaysAddVCSPath, pathData} = metadataOptions;
 
-    const {frontMatter, frontMatterStrippedContent} = separateAndExtractFrontMatter(
-        fileContent,
-        pathData.pathToFile,
-    );
+    const [frontMatter, strippedContent] = extractFrontMatter(fileContent, pathData.pathToFile);
 
     const vcsFrontMatter = metadataOptions.isContributorsEnabled
         ? await resolveVCSFrontMatter(frontMatter, metadataOptions, fileContent)
@@ -59,5 +53,5 @@ export const enrichWithFrontMatter = async ({
         },
     });
 
-    return normalizeLineEndings(emplaceFrontMatter(frontMatterStrippedContent, mergedFrontMatter));
+    return composeFrontMatter(mergedFrontMatter, strippedContent);
 };
diff --git a/src/services/metadata/index.ts b/src/services/metadata/index.ts
index 18d4b6b6..c5a27adb 100644
--- a/src/services/metadata/index.ts
+++ b/src/services/metadata/index.ts
@@ -1,3 +1,2 @@
-export * from './addSourcePath';
 export * from './enrich';
 export * from './vcsMetadata';
diff --git a/src/services/metadata/mergeMetadata.ts b/src/services/metadata/mergeMetadata.ts
index d7226bbc..5a68ebd0 100644
--- a/src/services/metadata/mergeMetadata.ts
+++ b/src/services/metadata/mergeMetadata.ts
@@ -1,6 +1,6 @@
 import {Resources, VarsMetadata} from '../../models';
 import {isObject} from '../utils';
-import {FrontMatter} from '@diplodoc/transform/lib/frontmatter/common';
+import {FrontMatter} from '@diplodoc/transform/lib/frontmatter';
 
 export const mergeFrontMatter = ({
     existingMetadata,
diff --git a/src/services/metadata/utils.ts b/src/services/metadata/utils.ts
deleted file mode 100644
index 174862cb..00000000
--- a/src/services/metadata/utils.ts
+++ /dev/null
@@ -1,6 +0,0 @@
-import {CARRIAGE_RETURN} from '../../constants';
-
-// IMO, we should just always apply this at the end of the whole processing pipeline,
-// not when dumping meta/front matter
-export const normalizeLineEndings = (input: string): string =>
-    input.replace(/\r?\n/g, CARRIAGE_RETURN);
diff --git a/src/services/metadata/vcsMetadata.ts b/src/services/metadata/vcsMetadata.ts
index 18fbbac6..044f9139 100644
--- a/src/services/metadata/vcsMetadata.ts
+++ b/src/services/metadata/vcsMetadata.ts
@@ -1,4 +1,6 @@
 import {TocService} from '..';
+import type {FrontMatter} from '@diplodoc/transform/lib/frontmatter';
+
 import {Contributor, MetaDataOptions, Metadata, PathData} from '../../models';
 import {VCSConnector} from '../../vcs-connector/connector-models';
 import {
@@ -8,7 +10,6 @@ import {
 } from '../authors';
 import {ContributorsServiceFileData, getFileContributors, getFileIncludes} from '../contributors';
 import {isObject} from '../utils';
-import {FrontMatter} from '@diplodoc/transform/lib/frontmatter/common';
 
 const getFileDataForContributorsService = (
     pathData: PathData,
diff --git a/src/services/preset.ts b/src/services/preset.ts
index 13694c85..b67f31d3 100644
--- a/src/services/preset.ts
+++ b/src/services/preset.ts
@@ -8,7 +8,7 @@ export type PresetStorage = Map<string, YfmPreset>;
 let presetStorage: PresetStorage = new Map();
 
 function init(vars: VarsService) {
-    for (const [path, values] of vars.entries()) {
+    for (const [path, values] of vars.entries) {
         presetStorage.set(dirname(path), values);
     }
 }
diff --git a/src/services/tocs.ts b/src/services/tocs.ts
index c8da036f..23cd2807 100644
--- a/src/services/tocs.ts
+++ b/src/services/tocs.ts
@@ -13,7 +13,7 @@ import {IncludeMode, Stage} from '../constants';
 import {isExternalHref, logger} from '../utils';
 import {filterFiles, firstFilterItem, firstFilterTextItems, liquidField} from './utils';
 import {IncludersError, applyIncluders} from './includers';
-import {addSourcePath} from './metadata';
+import {addSourcePath} from '../commands/build/core/meta';
 
 export interface TocServiceData {
     storage: Map<string, YfmToc>;
diff --git a/src/steps/processMapFile.ts b/src/steps/processMapFile.ts
index 5dc9c7d6..c3ccc1aa 100644
--- a/src/steps/processMapFile.ts
+++ b/src/steps/processMapFile.ts
@@ -24,7 +24,7 @@ export function prepareMapFile(): void {
 
         return preparedPath;
     });
-    const navigationPaths = {files: [...new Set(navigationPathsWithoutExtensions)]};
+    const navigationPaths = {files: [...new Set(navigationPathsWithoutExtensions)].sort()};
     const filesMapBuffer = Buffer.from(JSON.stringify(navigationPaths, null, '\t'), 'utf8');
     const mapFile = join(outputFolderPath, 'files.json');
 
diff --git a/src/steps/processPages.ts b/src/steps/processPages.ts
index 9ce664b6..9165b91b 100644
--- a/src/steps/processPages.ts
+++ b/src/steps/processPages.ts
@@ -1,5 +1,6 @@
 import type {DocInnerProps} from '@diplodoc/client';
-import {basename, dirname, extname, join, resolve} from 'path';
+import type {Run} from '~/commands/build';
+import {basename, dirname, extname, join, resolve} from 'node:path';
 import {existsSync, mkdirSync, readFileSync, writeFileSync} from 'fs';
 import log from '@diplodoc/transform/lib/log';
 import {asyncify, mapLimit} from 'async';
@@ -27,13 +28,7 @@ import {resolveMd2HTML, resolveMd2Md} from '../resolvers';
 import {ArgvService, LeadingService, PluginService, SearchService, TocService} from '../services';
 import {generateStaticMarkup} from '~/pages/document';
 import {generateStaticRedirect} from '~/pages/redirect';
-import {
-    getDepth,
-    joinSinglePageResults,
-    logger,
-    transformToc,
-    transformTocForSinglePage,
-} from '../utils';
+import {getDepth, joinSinglePageResults, transformToc, transformTocForSinglePage} from '../utils';
 import {getVCSConnector} from '../vcs-connector';
 import {VCSConnector} from '../vcs-connector/connector-models';
 
@@ -41,7 +36,7 @@ const singlePageResults: Record<string, SinglePageResult[]> = {};
 const singlePagePaths: Record<string, Set<string>> = {};
 
 // Processes files of documentation (like index.yaml, *.md)
-export async function processPages(outputBundlePath: string): Promise<void> {
+export async function processPages(run: Run): Promise<void> {
     const {
         input: inputFolderPath,
         output: outputFolderPath,
@@ -65,10 +60,10 @@ export async function processPages(outputBundlePath: string): Promise<void> {
                 inputFolderPath,
                 outputFolderPath,
                 outputFormat,
-                outputBundlePath,
+                run.bundlePath,
             );
 
-            logger.proc(pathToFile);
+            run.logger.proc(pathToFile);
 
             const metaDataOptions = getMetaDataOptions(pathData, vcsConnector);
 
@@ -82,11 +77,10 @@ export async function processPages(outputBundlePath: string): Promise<void> {
     );
 
     if (singlePage) {
-        await saveSinglePages();
-
         if (outputFormat === 'html') {
             await saveTocData(transformTocForSinglePage, 'single-page-toc');
         }
+        await saveSinglePages(run);
     }
 
     if (outputFormat === 'html') {
@@ -147,14 +141,7 @@ async function saveTocData(transform: (toc: YfmToc, tocDir: string) => YfmToc, f
     }
 }
 
-async function saveSinglePages() {
-    const {
-        input: inputFolderPath,
-        lang: configLang,
-        langs: configLangs,
-        resources,
-    } = ArgvService.getConfig();
-
+async function saveSinglePages(run: Run) {
     try {
         await Promise.all(
             Object.keys(singlePageResults).map(async (tocDir) => {
@@ -163,25 +150,24 @@ async function saveSinglePages() {
                 }
 
                 const relativeTocDir = tocDir
-                    .replace(inputFolderPath, '')
+                    .replace(run.input, '')
                     .replace(/\\/g, '/')
                     .replace(/^\/?/, '');
                 const singlePageBody = joinSinglePageResults(
                     singlePageResults[tocDir],
-                    inputFolderPath,
                     relativeTocDir,
                 );
 
                 const toc = TocService.getForPath(join(relativeTocDir, 'toc.yaml'))[1] as YfmToc;
-                const lang = configLang ?? Lang.RU;
-                const langs = configLangs?.length ? configLangs : [lang];
+                const lang = run.config.lang ?? Lang.RU;
+                const langs = run.config.langs.length ? run.config.langs : [lang];
 
                 const pageData = {
                     data: {
                         leading: false as const,
                         html: singlePageBody,
                         headings: [],
-                        meta: resources || {},
+                        meta: run.config.resources,
                         title: toc.title || '',
                     },
                     router: {
diff --git a/src/utils/common.ts b/src/utils/common.ts
index bae1fff7..79310dc8 100644
--- a/src/utils/common.ts
+++ b/src/utils/common.ts
@@ -1,3 +1,4 @@
+import type {Hook, HookMap} from 'tapable';
 import {cloneDeepWith, flatMapDeep, isArray, isObject, isString} from 'lodash';
 import {isFileExists, resolveRelativePath} from '@diplodoc/transform/lib/utilsFS';
 
@@ -24,7 +25,7 @@ export function modifyValuesByKeys(
     modifyFn: (value: string) => string,
 ) {
     // Clone the object deeply with a customizer function that modifies matching keys
-    return cloneDeepWith(originalObj, function (value: unknown, key) {
+    return cloneDeepWith(originalObj, (value: unknown, key) => {
         if (keysToFind.includes(key as string) && isString(value)) {
             return modifyFn(value);
         }
@@ -51,7 +52,10 @@ export function checkPathExists(path: string, parentFilePath: string) {
     return isFileExists(includePath);
 }
 
-export function own<T extends string>(box: unknown, field: T): box is {[p in T]: unknown} {
+export function own<V = unknown, T extends string = string>(
+    box: unknown,
+    field: T,
+): box is {[p in T]: V} {
     return (
         Boolean(box && typeof box === 'object') && Object.prototype.hasOwnProperty.call(box, field)
     );
@@ -75,3 +79,57 @@ export function freeze<T>(target: T, visited = new Set()): T {
 
     return target;
 }
+
+export type HookMeta = {
+    service: string;
+    hook: string;
+    name: string;
+    type: string;
+};
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export function intercept<T extends Hash<Hook<any, any> | HookMap<any>>>(
+    service: string,
+    hooks: T,
+): T {
+    for (const [hook, handler] of Object.entries(hooks)) {
+        handler.intercept({
+            register: (info) => {
+                const {type, name, fn} = info;
+                const meta = {service, hook, name, type};
+
+                if (type === 'promise') {
+                    info.fn = async (...args: unknown[]) => {
+                        try {
+                            return await fn(...args);
+                        } catch (error) {
+                            if (error instanceof Error) {
+                                Object.assign(error, {hook: meta});
+                            }
+
+                            throw error;
+                        }
+                    };
+                } else if (type === 'sync') {
+                    info.fn = (...args: unknown[]) => {
+                        try {
+                            return fn(...args);
+                        } catch (error) {
+                            if (error instanceof Error) {
+                                Object.assign(error, {hook: meta});
+                            }
+
+                            throw error;
+                        }
+                    };
+                } else {
+                    throw new TypeError('Unexpected hook tap type - ' + type);
+                }
+
+                return info;
+            },
+        });
+    }
+
+    return hooks;
+}
diff --git a/src/utils/decorators.ts b/src/utils/decorators.ts
new file mode 100644
index 00000000..dea73f1c
--- /dev/null
+++ b/src/utils/decorators.ts
@@ -0,0 +1,12 @@
+export function bounded(_originalMethod: unknown, context: ClassMethodDecoratorContext) {
+    const methodName = context.name;
+
+    if (context.private) {
+        throw new Error(`'bound' cannot decorate private properties like ${methodName as string}.`);
+    }
+
+    // eslint-disable-next-line @typescript-eslint/no-explicit-any
+    context.addInitializer(function (this: any) {
+        this[methodName] = this[methodName].bind(this);
+    });
+}
diff --git a/src/utils/index.ts b/src/utils/index.ts
index a495e0b1..87876f31 100644
--- a/src/utils/index.ts
+++ b/src/utils/index.ts
@@ -6,3 +6,4 @@ export * from './path';
 export * from './toc';
 export * from './presets';
 export * from './file';
+export * from './decorators';
diff --git a/src/utils/path.ts b/src/utils/path.ts
index 0aea9815..e01b6c22 100644
--- a/src/utils/path.ts
+++ b/src/utils/path.ts
@@ -1,6 +1,10 @@
-import {sep} from 'path';
+import {normalize, sep} from 'node:path';
 import {Platforms} from '../constants';
 
+export function normalizePath(path: string): NormalizedPath {
+    return normalize(path).replace(/\\/g, '/') as NormalizedPath;
+}
+
 export function addSlashPrefix(path: string): string {
     const slashPrefix = path.startsWith(sep) ? '' : sep;
 
diff --git a/src/utils/singlePage.ts b/src/utils/singlePage.ts
index c9794b1a..b9e83289 100644
--- a/src/utils/singlePage.ts
+++ b/src/utils/singlePage.ts
@@ -143,7 +143,6 @@ export function getSinglePageUrl(tocDir: string, path: string) {
 
 export function joinSinglePageResults(
     singlePageResults: SinglePageResult[],
-    root: string,
     tocDir: string,
 ): string {
     const delimeter = `<hr class="yfm-page__delimeter">`;
diff --git a/tests/e2e/__snapshots__/generate-map.spec.ts.snap b/tests/e2e/__snapshots__/generate-map.spec.ts.snap
index 4e5d6637..20eb9829 100644
--- a/tests/e2e/__snapshots__/generate-map.spec.ts.snap
+++ b/tests/e2e/__snapshots__/generate-map.spec.ts.snap
@@ -3,12 +3,12 @@
 exports[`Generate map for project with external links in toc 1`] = `
 "{
 	"files": [
-		"ru/folder1/folder2/a1",
-		"ru/folder1/a1",
 		"ru/",
-		"ru/settings",
+		"ru/folder1/a1",
+		"ru/folder1/folder2/a1",
 		"ru/plugins/",
-		"ru/project/"
+		"ru/project/",
+		"ru/settings"
 	]
 }"
 `;
@@ -17,17 +17,17 @@ exports[`Generate map for project with multiple language 1`] = `
 "{
 	"files": [
 		"en/",
-		"en/settings",
 		"en/plugins/",
 		"en/plugins/import",
 		"en/project/",
 		"en/project/config",
+		"en/settings",
 		"ru/",
-		"ru/settings",
 		"ru/plugins/",
 		"ru/plugins/import",
 		"ru/project/",
-		"ru/project/config"
+		"ru/project/config",
+		"ru/settings"
 	]
 }"
 `;
@@ -35,14 +35,14 @@ exports[`Generate map for project with multiple language 1`] = `
 exports[`Generate map for project with single language and toc include - only md2html 1`] = `
 "{
 	"files": [
-		"ru/folder1/folder2/a1",
-		"ru/folder1/a1",
 		"ru/",
-		"ru/settings",
+		"ru/folder1/a1",
+		"ru/folder1/folder2/a1",
 		"ru/plugins/",
 		"ru/plugins/import",
 		"ru/project/",
-		"ru/project/config"
+		"ru/project/config",
+		"ru/settings"
 	]
 }"
 `;
@@ -50,14 +50,14 @@ exports[`Generate map for project with single language and toc include - only md
 exports[`Generate map for project with single language and toc include 1`] = `
 "{
 	"files": [
-		"ru/folder1/folder2/a1",
-		"ru/folder1/a1",
 		"ru/",
-		"ru/settings",
+		"ru/folder1/a1",
+		"ru/folder1/folder2/a1",
 		"ru/plugins/",
 		"ru/plugins/import",
 		"ru/project/",
-		"ru/project/config"
+		"ru/project/config",
+		"ru/settings"
 	]
 }"
 `;
diff --git a/tests/integrations/services/liquidInFrontMatter.test.ts b/tests/integrations/services/liquidInFrontMatter.test.ts
index 150cdf53..04e29f09 100644
--- a/tests/integrations/services/liquidInFrontMatter.test.ts
+++ b/tests/integrations/services/liquidInFrontMatter.test.ts
@@ -1,24 +1,16 @@
-import {
-    emplaceFrontMatter,
-    separateAndExtractFrontMatter,
-} from '@diplodoc/transform/lib/frontmatter';
+import {composeFrontMatter, extractFrontMatter} from '@diplodoc/transform/lib/frontmatter';
 import liquid from '@diplodoc/transform/lib/liquid';
 import {readFile} from 'fs/promises';
-import {normalizeLineEndings} from '../../../src/services/metadata/utils';
 
 const propValuesMockPath = 'mocks/fileContent/metadata/substitutionsInMetadataPropertyValues.md';
-const propKeysMockPath = 'mocks/fileContent/metadata/substitutionsInMetadataPropertyKeys.md';
 const emptyStringMockPath = 'mocks/fileContent/metadata/substitutionsWithEmptyString.md';
 
 describe('Front matter (metadata) transformations', () => {
     it('do not break when a property value contains Liquid-style variable substitutions', async () => {
         const fileContent = await readFile(propValuesMockPath, {encoding: 'utf-8'});
 
-        const {frontMatter, frontMatterStrippedContent} =
-            separateAndExtractFrontMatter(fileContent);
-        const processedContent = normalizeLineEndings(
-            emplaceFrontMatter(frontMatterStrippedContent, frontMatter),
-        );
+        const [frontMatter, strippedContent] = extractFrontMatter(fileContent);
+        const processedContent = composeFrontMatter(frontMatter, strippedContent);
 
         expect(frontMatter).toMatchSnapshot();
         expect(processedContent).toMatchSnapshot();
@@ -27,11 +19,8 @@ describe('Front matter (metadata) transformations', () => {
     it('emit valid metadata when a variable is substituted with an ampty string', async () => {
         const fileContent = await readFile(emptyStringMockPath, {encoding: 'utf-8'});
 
-        const {frontMatter, frontMatterStrippedContent} =
-            separateAndExtractFrontMatter(fileContent);
-        const processedContent = normalizeLineEndings(
-            emplaceFrontMatter(frontMatterStrippedContent, frontMatter),
-        );
+        const [frontMatter, frontMatterStrippedContent] = extractFrontMatter(fileContent);
+        const processedContent = composeFrontMatter(frontMatter, frontMatterStrippedContent);
 
         const liquidProcessedInput = liquid(processedContent, {var: ''});
 
diff --git a/tests/integrations/services/metadataAuthors.test.ts b/tests/integrations/services/metadataAuthors.test.ts
index a0a7f3ac..dc1fbe1a 100644
--- a/tests/integrations/services/metadataAuthors.test.ts
+++ b/tests/integrations/services/metadataAuthors.test.ts
@@ -1,4 +1,4 @@
-import {separateAndExtractFrontMatter} from '@diplodoc/transform/lib/frontmatter';
+import {extractFrontMatter} from '@diplodoc/transform/lib/frontmatter';
 import {readFileSync} from 'fs';
 import {MetaDataOptions} from 'models';
 import {enrichWithFrontMatter} from 'services/metadata';
@@ -37,12 +37,12 @@ describe('getContentWithUpdatedMetadata (Authors)', () => {
             metadataOptions = {
                 pathData: {
                     pathToFile: '',
-                    resolvedPathToFile: '',
+                    resolvedPathToFile: '' as AbsolutePath,
                     filename: '',
                     fileBaseName: '',
                     fileExtension: '',
-                    outputDir: '',
-                    outputPath: '',
+                    outputDir: '' as AbsolutePath,
+                    outputPath: '' as AbsolutePath,
                     outputFormat: '',
                     outputBundlePath: '',
                     outputTocDir: '',
@@ -63,8 +63,8 @@ describe('getContentWithUpdatedMetadata (Authors)', () => {
                 resolvedFrontMatterVars: {},
             });
 
-            const {frontMatter: originalMeta} = separateAndExtractFrontMatter(fileContent);
-            const {frontMatter: updatedMeta} = separateAndExtractFrontMatter(updatedFileContent);
+            const [originalMeta] = extractFrontMatter(fileContent);
+            const [updatedMeta] = extractFrontMatter(updatedFileContent);
 
             const expectedMeta = {
                 ...originalMeta,
@@ -83,8 +83,8 @@ describe('getContentWithUpdatedMetadata (Authors)', () => {
                 resolvedFrontMatterVars: {},
             });
 
-            const {frontMatter: originalMeta} = separateAndExtractFrontMatter(fileContent);
-            const {frontMatter: updatedMeta} = separateAndExtractFrontMatter(updatedFileContent);
+            const [originalMeta] = extractFrontMatter(fileContent);
+            const [updatedMeta] = extractFrontMatter(updatedFileContent);
 
             expect(updatedMeta).toEqual(originalMeta);
         });
@@ -94,12 +94,12 @@ describe('getContentWithUpdatedMetadata (Authors)', () => {
         const metadataOptions: MetaDataOptions = {
             pathData: {
                 pathToFile: '',
-                resolvedPathToFile: '',
+                resolvedPathToFile: '' as AbsolutePath,
                 filename: '',
                 fileBaseName: '',
                 fileExtension: '',
-                outputDir: '',
-                outputPath: '',
+                outputDir: '' as AbsolutePath,
+                outputPath: '' as AbsolutePath,
                 outputFormat: '',
                 outputBundlePath: '',
                 outputTocDir: '',
@@ -119,10 +119,8 @@ describe('getContentWithUpdatedMetadata (Authors)', () => {
                 resolvedFrontMatterVars: {},
             });
 
-            const {frontMatter: metadataBeforeEnrichment} =
-                separateAndExtractFrontMatter(fileContent);
-            const {frontMatter: metadataAfterEnrichment} =
-                separateAndExtractFrontMatter(updatedFileContent);
+            const [metadataBeforeEnrichment] = extractFrontMatter(fileContent);
+            const [metadataAfterEnrichment] = extractFrontMatter(updatedFileContent);
 
             expect(metadataAfterEnrichment).toEqual(metadataBeforeEnrichment);
         });
@@ -141,10 +139,8 @@ describe('getContentWithUpdatedMetadata (Authors)', () => {
                     resolvedFrontMatterVars: {},
                 });
 
-                const {frontMatter: metadataBeforeEnrichment} =
-                    separateAndExtractFrontMatter(fileContent);
-                const {frontMatter: metadataAfterEnrichment} =
-                    separateAndExtractFrontMatter(updatedFileContent);
+                const [metadataBeforeEnrichment] = extractFrontMatter(fileContent);
+                const [metadataAfterEnrichment] = extractFrontMatter(updatedFileContent);
 
                 expect(metadataAfterEnrichment).toEqual(metadataBeforeEnrichment);
             },
@@ -168,10 +164,8 @@ describe('getContentWithUpdatedMetadata (Authors)', () => {
                     resolvedFrontMatterVars: {},
                 });
 
-                const {frontMatter: metadataBeforeEnrichment} =
-                    separateAndExtractFrontMatter(fileContent);
-                const {frontMatter: metadataAfterEnrichment} =
-                    separateAndExtractFrontMatter(updatedFileContent);
+                const [metadataBeforeEnrichment] = extractFrontMatter(fileContent);
+                const [metadataAfterEnrichment] = extractFrontMatter(updatedFileContent);
 
                 expect(metadataAfterEnrichment).toEqual(metadataBeforeEnrichment);
             },
@@ -188,8 +182,8 @@ describe('getContentWithUpdatedMetadata (Authors)', () => {
                 resolvedFrontMatterVars: {},
             });
 
-            const {frontMatter: originalMeta} = separateAndExtractFrontMatter(fileContent);
-            const {frontMatter: updatedMeta} = separateAndExtractFrontMatter(updatedFileContent);
+            const [originalMeta] = extractFrontMatter(fileContent);
+            const [updatedMeta] = extractFrontMatter(updatedFileContent);
 
             const expectedMeta = {
                 ...originalMeta,
diff --git a/tests/integrations/services/metadataContributors.test.ts b/tests/integrations/services/metadataContributors.test.ts
index d9c67942..6a239b0f 100644
--- a/tests/integrations/services/metadataContributors.test.ts
+++ b/tests/integrations/services/metadataContributors.test.ts
@@ -3,7 +3,7 @@ import {normalize} from 'path';
 import {Contributor, Contributors, MetaDataOptions} from 'models';
 import {enrichWithFrontMatter} from 'services/metadata';
 import {VCSConnector} from 'vcs-connector/connector-models';
-import {separateAndExtractFrontMatter} from '@diplodoc/transform/lib/frontmatter';
+import {extractFrontMatter} from '@diplodoc/transform/lib/frontmatter';
 
 const simpleMetadataFilePath = 'mocks/fileContent/metadata/simpleMetadata.md';
 const withoutMetadataFilePath = 'mocks/fileContent/metadata/withoutMetadata.md';
@@ -15,12 +15,12 @@ describe('getContentWithUpdatedMetadata (Contributors)', () => {
     const metadataOptions: MetaDataOptions = {
         pathData: {
             pathToFile: '',
-            resolvedPathToFile: '',
+            resolvedPathToFile: '' as AbsolutePath,
             filename: '',
             fileBaseName: '',
             fileExtension: '',
-            outputDir: '',
-            outputPath: '',
+            outputDir: '' as AbsolutePath,
+            outputPath: '' as AbsolutePath,
             outputFormat: '',
             outputBundlePath: '',
             outputTocDir: '',
@@ -60,9 +60,8 @@ describe('getContentWithUpdatedMetadata (Contributors)', () => {
                     resolvedFrontMatterVars: {},
                 });
 
-                const {frontMatter: originalMeta} = separateAndExtractFrontMatter(fileContent);
-                const {frontMatter: updatedMeta} =
-                    separateAndExtractFrontMatter(updatedFileContent);
+                const [originalMeta] = extractFrontMatter(fileContent);
+                const [updatedMeta] = extractFrontMatter(updatedFileContent);
 
                 expect(updatedMeta).toEqual(originalMeta);
             });
@@ -84,9 +83,8 @@ describe('getContentWithUpdatedMetadata (Contributors)', () => {
                         resolvedFrontMatterVars: {},
                     });
 
-                    const {frontMatter: originalMeta} = separateAndExtractFrontMatter(fileContent);
-                    const {frontMatter: updatedMeta} =
-                        separateAndExtractFrontMatter(updatedFileContent);
+                    const [originalMeta] = extractFrontMatter(fileContent);
+                    const [updatedMeta] = extractFrontMatter(updatedFileContent);
 
                     expect(updatedMeta).toEqual(originalMeta);
                 },
@@ -127,9 +125,8 @@ describe('getContentWithUpdatedMetadata (Contributors)', () => {
                     resolvedFrontMatterVars: {},
                 });
 
-                const {frontMatter: originalMeta} = separateAndExtractFrontMatter(fileContent);
-                const {frontMatter: updatedMeta} =
-                    separateAndExtractFrontMatter(updatedFileContent);
+                const [originalMeta] = extractFrontMatter(fileContent);
+                const [updatedMeta] = extractFrontMatter(updatedFileContent);
 
                 const expectedMeta = {
                     ...originalMeta,
@@ -169,9 +166,8 @@ describe('getContentWithUpdatedMetadata (Contributors)', () => {
                         resolvedFrontMatterVars: {},
                     });
 
-                    const {frontMatter: originalMeta} = separateAndExtractFrontMatter(fileContent);
-                    const {frontMatter: updatedMeta} =
-                        separateAndExtractFrontMatter(updatedFileContent);
+                    const [originalMeta] = extractFrontMatter(fileContent);
+                    const [updatedMeta] = extractFrontMatter(updatedFileContent);
 
                     const expectedMeta = {
                         ...originalMeta,
@@ -248,7 +244,7 @@ describe('getContentWithUpdatedMetadata (Contributors)', () => {
                                 contributors: getFileContributors(path),
                                 hasIncludes: item.getHasIncludes(path),
                             });
-                        metadataOptions.pathData.resolvedPathToFile = withIncludesFilePath;
+                        metadataOptions.pathData.resolvedPathToFile = withIncludesFilePath as AbsolutePath;
                         const fileContent = readFileSync(withIncludesFilePath, 'utf8');
 
                         const updatedFileContent = await enrichWithFrontMatter({
@@ -257,10 +253,8 @@ describe('getContentWithUpdatedMetadata (Contributors)', () => {
                             resolvedFrontMatterVars: {},
                         });
 
-                        const {frontMatter: originalMeta} =
-                            separateAndExtractFrontMatter(fileContent);
-                        const {frontMatter: updatedMeta} =
-                            separateAndExtractFrontMatter(updatedFileContent);
+                        const [originalMeta] = extractFrontMatter(fileContent);
+                        const [updatedMeta] = extractFrontMatter(updatedFileContent);
 
                         const expectedMeta = {
                             ...originalMeta,
@@ -286,10 +280,8 @@ describe('getContentWithUpdatedMetadata (Contributors)', () => {
                 resolvedFrontMatterVars: {},
             });
 
-            const {frontMatter: metadataBeforeEnrichment} =
-                separateAndExtractFrontMatter(fileContent);
-            const {frontMatter: metadataAfterEnrichment} =
-                separateAndExtractFrontMatter(updatedFileContent);
+            const [metadataBeforeEnrichment] = extractFrontMatter(fileContent);
+            const [metadataAfterEnrichment] = extractFrontMatter(updatedFileContent);
 
             expect(metadataAfterEnrichment).toEqual(metadataBeforeEnrichment);
         });
@@ -308,10 +300,8 @@ describe('getContentWithUpdatedMetadata (Contributors)', () => {
                     resolvedFrontMatterVars: {},
                 });
 
-                const {frontMatter: metadataBeforeEnrichment} =
-                    separateAndExtractFrontMatter(fileContent);
-                const {frontMatter: metadataAfterEnrichment} =
-                    separateAndExtractFrontMatter(updatedFileContent);
+                const [metadataBeforeEnrichment] = extractFrontMatter(fileContent);
+                const [metadataAfterEnrichment] = extractFrontMatter(updatedFileContent);
 
                 expect(metadataAfterEnrichment).toEqual(metadataBeforeEnrichment);
             },
diff --git a/tests/jest.config.js b/tests/jest.config.js
index 8c356442..2cd11613 100644
--- a/tests/jest.config.js
+++ b/tests/jest.config.js
@@ -2,14 +2,14 @@ const path = require('path');
 
 module.exports = {
   transform: {
-    '^.+\\.(j|t)s?$': ['ts-jest', {tsconfig: '<rootDir>/tsconfig.json'}],
+    '^.+\\.ts?$': ['ts-jest', {tsconfig: '<rootDir>/tsconfig.json'}],
   },
   verbose: true,
   preset: 'ts-jest',
   testMatch: ['<rootDir>/**/*.@(test|spec).ts'],
   testEnvironment: 'node',
   roots: ['<rootDir>/..', '../src', '../tests'],
-  collectCoverageFrom: ['../src/**/*.ts', '!../src/app/**', '!../src/**/*.d.ts'],
+  collectCoverageFrom: ['../src/**/*.ts', '!../src/**/*.d.ts'],
   coverageProvider: 'v8',
   coverageDirectory: '<rootDir>/coverage',
   moduleDirectories: ['node_modules', path.join(__dirname, '../src'), path.join(__dirname, '../tests')],
diff --git a/tests/tsconfig.json b/tests/tsconfig.json
index 40e1635e..09d1f5a0 100644
--- a/tests/tsconfig.json
+++ b/tests/tsconfig.json
@@ -9,5 +9,12 @@
       "~/*": ["../src/*"]
     },
     "types": ["node", "jest"]
-  }
+  },
+  "include": [
+    "../src",
+    "."
+  ],
+  "exclude": [
+    "node_modules"
+  ]
 }
diff --git a/tests/units/services/metadata.test.ts b/tests/units/services/metadata.test.ts
index a68f6e66..dda159c1 100644
--- a/tests/units/services/metadata.test.ts
+++ b/tests/units/services/metadata.test.ts
@@ -48,12 +48,12 @@ describe('getUpdatedMetadata', () => {
         metaDataOptions = {
             pathData: {
                 pathToFile: '',
-                resolvedPathToFile: '',
+                resolvedPathToFile: '' as AbsolutePath,
                 filename: '',
                 fileBaseName: '',
                 fileExtension: '',
-                outputDir: '',
-                outputPath: '',
+                outputDir: '' as AbsolutePath,
+                outputPath: '' as AbsolutePath,
                 outputFormat: '',
                 outputBundlePath: '',
                 outputTocDir: '',
diff --git a/tests/utils.ts b/tests/utils.ts
index 4ef01437..66552301 100644
--- a/tests/utils.ts
+++ b/tests/utils.ts
@@ -39,7 +39,7 @@ export function compareDirectories(outputPath: string) {
     const filesFromOutput = walkSync(outputPath, {
         directories: false,
         includeBasePath: false,
-    });
+    }).sort();
 
     expect(bundleless(JSON.stringify(filesFromOutput, null, 2))).toMatchSnapshot('filelist');
 
diff --git a/tsconfig.json b/tsconfig.json
index 3bc49dd1..7a503038 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -6,6 +6,7 @@
     "outDir": "build",
     "module": "es2022",
     "moduleResolution": "bundler",
+    "experimentalDecorators": false,
     "paths": {
       "~/*": ["./src/*"]
     }