diff --git a/.vscode/extensions.json b/.vscode/extensions.json
index a0aac80..733b417 100644
--- a/.vscode/extensions.json
+++ b/.vscode/extensions.json
@@ -1,6 +1,7 @@
 {
     "recommendations": [
         "stylelint.vscode-stylelint",
-        "dbaeumer.vscode-eslint"
+        "dbaeumer.vscode-eslint",
+        "typescriptteam.native-preview"
     ]
 }
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
index 8c0111c..cd2c7b2 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -1,4 +1,9 @@
 {
     "files.eol": "\n",
     "postman.settings.dotenv-detection-notification-visibility": false,
+    // Use the native TypeScript compiler (tsgo, @typescript/native-preview) as the
+    // editor language server. Requires the "TypeScript (Native Preview)" extension.
+    // Every typecheck target now runs tsgo, so the whole workspace — incl. apps/backend
+    // (node16) — is tsgo-compatible.
+    "typescript.experimental.useTsgo": true,
 }
diff --git a/CLAUDE.md b/CLAUDE.md
index 1968407..b76e34b 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -78,7 +78,7 @@ Standard Nest module layout (`words`, `user`, `auth`, `supabase`, `config`, `com
 
 Env is validated at startup (`src/config/env.validation.ts`); missing vars exit the process with a readable message instead of failing on the first request. See `apps/backend/README.md`.
 
-Database types are generated, not hand-written: `generate-types` in `apps/backend` regenerates `database.types.ts` and copies it into `packages/api`. Do not edit those files, and note `lint` runs with `--fix` — the generated types are eslint-ignored so it cannot reformat them.
+Database types are generated, not hand-written: `generate-types` in `apps/backend` regenerates `database.types.ts` and copies it into `packages/api`. Do not edit those files (they are eslint-ignored, so `lint:fix` cannot reformat them). Backend `lint` is check-only; use `lint:fix` to autofix — same split as every other package.
 
 **The API contract is generated too.** Backend DTOs → Swagger → `packages/api/src/schemas/openapi.json` → `api.ts` → SDK → `apps/web`. After changing a DTO or a handler's return type, run `pnpm --filter app-backend generate:api-schemas` (needs a valid root `.env`) and commit the regenerated schemas, otherwise `apps/web` typechecks against a stale contract.
 
diff --git a/apps/backend/package.json b/apps/backend/package.json
index b9e0173..ab4a405 100644
--- a/apps/backend/package.json
+++ b/apps/backend/package.json
@@ -7,8 +7,9 @@
         "start": "nest start",
         "start:dev": "nest start --watch",
         "start:prod": "node dist/main.js",
-        "lint": "eslint \"{src,apps,libs,test}/**/*.ts\" --fix",
-        "typecheck": "tsc --noEmit",
+        "lint": "eslint \"{src,apps,libs,test}/**/*.ts\"",
+        "lint:fix": "npm run lint -- --fix",
+        "typecheck": "tsgo --noEmit",
         "generate:api-schemas": "ts-node --project tsconfig.json scripts/generate-api-schemas.ts",
         "generate-types": "ts-node ./scripts/generate-db-types.ts",
         "test:unit": "vitest",
diff --git a/apps/backend/test/nest-app.ts b/apps/backend/test/nest-app.ts
index 5f14953..1c3c005 100644
--- a/apps/backend/test/nest-app.ts
+++ b/apps/backend/test/nest-app.ts
@@ -46,8 +46,8 @@ export const supabaseStub = {
 export const createTestApp = async (
     supabase: unknown = supabaseStub,
 ): Promise<INestApplication> => {
-    const { AppModule } = await import("../src/app.module");
-    const { SupabaseService } = await import("../src/supabase/supabase.service");
+    const { AppModule } = await import("../src/app.module.js");
+    const { SupabaseService } = await import("../src/supabase/supabase.service.js");
 
     const moduleRef = await Test.createTestingModule({ imports: [AppModule] })
         .overrideProvider(SupabaseService)
diff --git a/apps/backend/tsconfig.json b/apps/backend/tsconfig.json
index 9bcf7c2..90f0e99 100644
--- a/apps/backend/tsconfig.json
+++ b/apps/backend/tsconfig.json
@@ -1,7 +1,7 @@
 {
   "compilerOptions": {
-    "module": "commonjs",
-    "moduleResolution": "node",
+    "module": "node16",
+    "moduleResolution": "node16",
     "target": "ES2021",
     "lib": ["ES2021"],
     "declaration": true,
@@ -14,11 +14,10 @@
     "strictNullChecks": true,
     "noImplicitAny": true,
     "strictBindCallApply": true,
-    "forceConsistentCasingInFileNames": false,
+    "forceConsistentCasingInFileNames": true,
     "noFallthroughCasesInSwitch": false,
     "sourceMap": true,
     "outDir": "./dist",
-    "baseUrl": "./",
     "incremental": true,
     "resolveJsonModule": true,
     "types": ["node"],
diff --git a/apps/storybook/package.json b/apps/storybook/package.json
index 566c06a..cadce83 100644
--- a/apps/storybook/package.json
+++ b/apps/storybook/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "build": "storybook build -o dist-storybook",
     "storybook": "storybook dev --no-open -p 6006",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "dependencies": {
     "@heroui/system": "^2.4.23",
diff --git a/apps/storybook/tsconfig.json b/apps/storybook/tsconfig.json
index e2a5be8..c06251b 100644
--- a/apps/storybook/tsconfig.json
+++ b/apps/storybook/tsconfig.json
@@ -5,8 +5,6 @@
   "include": [
     ".",
     ".storybook/**/*",
-  ],
-  "compilerOptions": {
-    "baseUrl": ".",
-  }
+    "../../types/assets.d.ts",
+  ]
 }
\ No newline at end of file
diff --git a/apps/web/package.json b/apps/web/package.json
index 17fbc6f..89d14f3 100644
--- a/apps/web/package.json
+++ b/apps/web/package.json
@@ -24,7 +24,7 @@
     "start:prod": "cross-env NODE_ENV=production tsx src/server/main.ts",
     "stylelint": "stylelint \"**/*.{css,scss}\" --config ../../stylelint.config.mjs",
     "stylelint:fix": "pnpm run stylelint -- --fix",
-    "typecheck": "tsc --build ./tsconfig.json",
+    "typecheck": "tsgo --build ./tsconfig.json",
     "knip": "knip --config ./knip.config.ts"
   },
   "dependencies": {
diff --git a/apps/web/src/locales/tsconfig.json b/apps/web/src/locales/tsconfig.json
index dbd9355..36371a9 100644
--- a/apps/web/src/locales/tsconfig.json
+++ b/apps/web/src/locales/tsconfig.json
@@ -6,7 +6,6 @@
     "**/*.json"
   ],
   "compilerOptions": {
-    "baseUrl": ".",
     "resolveJsonModule": true,
   }
 }
\ No newline at end of file
diff --git a/apps/web/src/server/tsconfig.json b/apps/web/src/server/tsconfig.json
index b971625..98c7582 100644
--- a/apps/web/src/server/tsconfig.json
+++ b/apps/web/src/server/tsconfig.json
@@ -12,7 +12,6 @@
     }
   ],
   "compilerOptions": {
-    "baseUrl": ".",
     // TODO: Fix relative server paths
     //    "paths": {
     //      "@/*": ["./*"],
diff --git a/apps/web/src/shared/tsconfig.json b/apps/web/src/shared/tsconfig.json
index c08a3cb..45ca08a 100644
--- a/apps/web/src/shared/tsconfig.json
+++ b/apps/web/src/shared/tsconfig.json
@@ -4,8 +4,5 @@
   ],
   "include": [
     "."
-  ],
-  "compilerOptions": {
-    "baseUrl": ".",
-  }
+  ]
 }
\ No newline at end of file
diff --git a/apps/web/src/ui/tsconfig.json b/apps/web/src/ui/tsconfig.json
index d93a2ea..f0cece1 100644
--- a/apps/web/src/ui/tsconfig.json
+++ b/apps/web/src/ui/tsconfig.json
@@ -4,11 +4,10 @@
   ],
   "include": [
     ".",
-    "typings.d.ts",
+    "../../../../types/assets.d.ts",
     "../vite-env.d.ts"
   ],
   "exclude": [
-    "**/*.test.*",
     "**/*.test.*",
     "**/*.stories.*",
     "**/__stories__",
@@ -23,7 +22,6 @@
     }
   ],
   "compilerOptions": {
-    "baseUrl": ".",
     "paths": {
       "@/*": [
         "./*"
diff --git a/apps/web/src/ui/typings.d.ts b/apps/web/src/ui/typings.d.ts
deleted file mode 100644
index e0ceb0e..0000000
--- a/apps/web/src/ui/typings.d.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-declare module "*.scss" {
-    const content: Record<string, string>;
-    export default content;
-}
diff --git a/apps/web/tsconfig.json b/apps/web/tsconfig.json
index ce63b02..1e7677c 100644
--- a/apps/web/tsconfig.json
+++ b/apps/web/tsconfig.json
@@ -5,6 +5,7 @@
   "compilerOptions": {
     "rootDir": ".",
     "outDir": "./.typecheck",
+    "noEmit": true,
   },
   "include": [
     "*.config.ts",
diff --git a/docs/tsgo-benchmark.md b/docs/tsgo-benchmark.md
new file mode 100644
index 0000000..b5477b9
--- /dev/null
+++ b/docs/tsgo-benchmark.md
@@ -0,0 +1,74 @@
+# Typecheck: `tsc` → `tsgo` migration (`@typescript/native-preview`)
+
+Type checking was moved from classic `tsc` to the native `tsgo` compiler
+(`@typescript/native-preview`, TypeScript 7 preview). Speedup measurements below.
+
+## Results (hyperfine / Measure-Command, Windows 11, warm FS cache)
+
+| Target | tsc | tsgo | Speedup |
+|---|---|---|---|
+| `apps/web` (`--build`, project references) | 4.13 s | 0.86 s | **4.77×** |
+| `packages/uikit` (`--noEmit`) | 2.37 s | 0.39 s | **6.07×** |
+| `packages/class-names` (`--noEmit`, small) | 0.83 s | 0.21 s | **3.86×** |
+| **All 19 migrated targets** (sum, without nx) | **22.35 s** | **5.06 s** | **4.42×** |
+
+A full type-check pass over the migrated packages dropped from ~22 s to ~5 s
+(~17 s saved). Smaller packages gain less — there the fixed process-startup cost
+dominates.
+
+Methodology: `hyperfine -w 1 -r 5` for single targets (for `apps/web` — `-r 3`,
+clearing `.typecheck` before each run); the aggregate is the sum of pure compiler
+time across all 19 targets, averaged over 2 runs after warmup, without the nx
+wrapper. Both compilers run against the same tsconfigs.
+
+## What changed
+
+- **All 20** typecheck scripts switched to `tsgo` (`tsc --noEmit` → `tsgo --noEmit`;
+  `apps/web`: `tsc --build` → `tsgo --build`).
+- `@typescript/native-preview` added to the root devDependencies. `typescript`/`tsc`
+  is kept — it remains the runtime compiler for `tsx`, `nest build`, `vitest`,
+  `ts-node`, `vite`.
+- **IDE:** the native tsgo language server is enabled — `.vscode/settings.json` →
+  `typescript.experimental.useTsgo: true`, and the `typescriptteam.native-preview`
+  extension is added to the recommendations (`.vscode/extensions.json`). Works in
+  both VS Code and Cursor.
+
+### Config changes required by TypeScript 7
+
+tsgo is TS7, which removed a few options that the project actually used:
+
+- **`baseUrl` removed.** Dropped from every tsgo target (it was redundant: `paths`
+  work without it and resolve relative to the tsconfig directory). Verified green on
+  `tsc 5.7`.
+- **Style side-effect imports** (`import "./x.scss"`) now require an ambient module
+  declaration (error TS2882), which `tsc` silently tolerated. Added a shared
+  `types/assets.d.ts` (`declare module "*.scss" | "*.css"`), wired via `include` into
+  the packages whose programs compile UI sources directly or transitively through
+  `@languages-learner/uikit` (`uikit`, `data-source`, `storybook`, `apps/web/src/ui`).
+
+### `apps/backend` modernized for TS7
+
+`apps/backend` used `moduleResolution: "node"`, which was removed in TS7. It was
+switched to `module: node16` + `moduleResolution: node16`. The only source change:
+dynamic `import()` calls in `test/nest-app.ts` require the `.js` extension (ESM
+resolution): `import("../src/app.module")` → `import("../src/app.module.js")`.
+Verified nothing broke:
+
+- `tsgo --noEmit` and `tsc --noEmit` — green;
+- 64 unit/e2e tests (`vitest`/`swc`) pass — the runtime resolves `.js` → `.ts`;
+- `nest build` still emits CommonJS (`module: node16` for a CJS package without
+  `"type": "module"` yields `require`/`exports`).
+
+### Incidental cleanups
+
+- `apps/web/tsconfig.json`: added `noEmit: true` — the solution project no longer
+  emits config-file JS into `.typecheck/`.
+- `apps/web/src/ui/tsconfig.json`: removed the duplicated `"**/*.test.*"` in `exclude`.
+- `apps/backend/tsconfig.json`: `forceConsistentCasingInFileNames` aligned to `true`
+  (consistent with the base config).
+
+## Next (out of scope for this migration)
+
+- **Nx cache for `typecheck`** (`targetDefaults` in `nx.json`) — not configured yet,
+  so type checking is recomputed for every project on each run. Orthogonal to tsgo;
+  would let unchanged projects be skipped. Planned as a separate phase.
diff --git a/nx.json b/nx.json
index 086b82f..bb3cafe 100644
--- a/nx.json
+++ b/nx.json
@@ -1,3 +1,49 @@
 {
-  "$schema": "./node_modules/nx/schemas/nx-schema.json"
-}
\ No newline at end of file
+  "$schema": "./node_modules/nx/schemas/nx-schema.json",
+  "namedInputs": {
+    "default": ["{projectRoot}/**/*", "sharedGlobals"],
+    "sharedGlobals": [
+      "{workspaceRoot}/pnpm-lock.yaml",
+      "{workspaceRoot}/tsconfig.base.json",
+      "{workspaceRoot}/tsconfig.base.composite.json",
+      "{workspaceRoot}/types/**/*"
+    ]
+  },
+  "targetDefaults": {
+    "typecheck": {
+      "cache": true,
+      "inputs": ["default", "^default"],
+      "outputs": []
+    },
+    "lint": {
+      "cache": true,
+      "inputs": [
+        "default",
+        "^default",
+        "{workspaceRoot}/eslint.config.mjs",
+        "{workspaceRoot}/prettier.config.mjs"
+      ],
+      "outputs": []
+    },
+    "test:unit:ci": {
+      "cache": true,
+      "inputs": [
+        "default",
+        "^default",
+        "{workspaceRoot}/vitest.config.ts",
+        "{workspaceRoot}/vitest.shims.d.ts"
+      ],
+      "outputs": []
+    },
+    "stylelint": {
+      "cache": true,
+      "inputs": ["default", "{workspaceRoot}/stylelint.config.mjs"],
+      "outputs": []
+    },
+    "circular-deps": {
+      "cache": true,
+      "inputs": ["default"],
+      "outputs": []
+    }
+  }
+}
diff --git a/package.json b/package.json
index 6f4c9e4..f47d501 100644
--- a/package.json
+++ b/package.json
@@ -37,10 +37,12 @@
   "devDependencies": {
     "@formatjs/cli": "^6.7.1",
     "@languages-learner/har-sanitizer": "workspace:*",
+    "@playwright/experimental-ct-react": "1.52.0",
     "@tanstack/eslint-config": "^0.3.3",
     "@types/node": "^22.15.29",
     "@types/react": "^19.0.10",
     "@types/react-dom": "^19.2.3",
+    "@typescript/native-preview": "7.0.0-dev.20260707.2",
     "@vitest/browser": "^3.1.4",
     "cross-env": "^7.0.3",
     "eslint": "^9.39.1",
@@ -68,8 +70,7 @@
     "ts-node": "11.0.0-beta.1",
     "typescript": "~5.7.2",
     "typescript-eslint": "^8.26.1",
-    "vitest": "^3.1.4",
-    "@playwright/experimental-ct-react": "1.52.0"
+    "vitest": "^3.1.4"
   },
   "pnpm": {
     "overrides": {
diff --git a/packages/api/package.json b/packages/api/package.json
index a5fdf32..111e930 100644
--- a/packages/api/package.json
+++ b/packages/api/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "lint": "eslint --concurrency=auto .",
     "lint:fix": "npm run lint -- --fix",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "dependencies": {
     "@supabase/supabase-js": "2.49.4"
diff --git a/packages/api/tsconfig.json b/packages/api/tsconfig.json
index ab56f64..8b40cc0 100644
--- a/packages/api/tsconfig.json
+++ b/packages/api/tsconfig.json
@@ -4,8 +4,5 @@
   ],
   "include": [
     "./src",
-  ],
-  "compilerOptions": {
-    "baseUrl": ".",
-  }
+  ]
 }
diff --git a/packages/app-core-tests-utils/package.json b/packages/app-core-tests-utils/package.json
index d4e7802..c6bef20 100644
--- a/packages/app-core-tests-utils/package.json
+++ b/packages/app-core-tests-utils/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "lint": "eslint --concurrency=auto .",
     "lint:fix": "npm run lint -- --fix",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "devDependencies": {
     "@playwright/test": "1.52.0",
diff --git a/packages/app-integration-tests-utils/package.json b/packages/app-integration-tests-utils/package.json
index fd36396..22021a9 100644
--- a/packages/app-integration-tests-utils/package.json
+++ b/packages/app-integration-tests-utils/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "lint": "eslint --concurrency=auto .",
     "lint:fix": "npm run lint -- --fix",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "devDependencies": {
     "@languages-learner/playwright-utils": "workspace:*",
diff --git a/packages/class-names/package.json b/packages/class-names/package.json
index bdc8b21..3e88e65 100644
--- a/packages/class-names/package.json
+++ b/packages/class-names/package.json
@@ -9,7 +9,7 @@
     "lint:fix": "npm run lint -- --fix",
     "test:unit": "vitest",
     "test:unit:ci": "vitest --run",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "devDependencies": {
     "@bem-react/classname": "^1.7.0",
diff --git a/packages/class-names/tsconfig.json b/packages/class-names/tsconfig.json
index eb751bd..562939f 100644
--- a/packages/class-names/tsconfig.json
+++ b/packages/class-names/tsconfig.json
@@ -4,8 +4,5 @@
   ],
   "include": [
     ".",
-  ],
-  "compilerOptions": {
-    "baseUrl": ".",
-  }
+  ]
 }
\ No newline at end of file
diff --git a/packages/component-core-tests-utils/package.json b/packages/component-core-tests-utils/package.json
index 21cd136..6cebb49 100644
--- a/packages/component-core-tests-utils/package.json
+++ b/packages/component-core-tests-utils/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "lint": "eslint --concurrency=auto .",
     "lint:fix": "npm run lint -- --fix",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "dependencies": {
     "@playwright/experimental-ct-react": "1.52.0",
diff --git a/packages/data-source/package.json b/packages/data-source/package.json
index 418196d..1b69155 100644
--- a/packages/data-source/package.json
+++ b/packages/data-source/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "lint": "eslint --concurrency=auto .",
     "lint:fix": "npm run lint -- --fix",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "dependencies": {
     "@gravity-ui/data-source": "^0.6.1",
diff --git a/packages/data-source/tsconfig.json b/packages/data-source/tsconfig.json
index eb751bd..ed60bfc 100644
--- a/packages/data-source/tsconfig.json
+++ b/packages/data-source/tsconfig.json
@@ -4,8 +4,6 @@
   ],
   "include": [
     ".",
-  ],
-  "compilerOptions": {
-    "baseUrl": ".",
-  }
+    "../../types/assets.d.ts",
+  ]
 }
\ No newline at end of file
diff --git a/packages/error-utils/package.json b/packages/error-utils/package.json
index fb5d2b8..158802f 100644
--- a/packages/error-utils/package.json
+++ b/packages/error-utils/package.json
@@ -9,7 +9,7 @@
     "lint:fix": "npm run lint -- --fix",
     "test:unit": "vitest",
     "test:unit:ci": "vitest --run",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "devDependencies": {
     "vitest": "^3.1.4"
diff --git a/packages/error-utils/tsconfig.json b/packages/error-utils/tsconfig.json
index eb751bd..562939f 100644
--- a/packages/error-utils/tsconfig.json
+++ b/packages/error-utils/tsconfig.json
@@ -4,8 +4,5 @@
   ],
   "include": [
     ".",
-  ],
-  "compilerOptions": {
-    "baseUrl": ".",
-  }
+  ]
 }
\ No newline at end of file
diff --git a/packages/form-components/package.json b/packages/form-components/package.json
index eebd1ec..5c54f49 100644
--- a/packages/form-components/package.json
+++ b/packages/form-components/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "lint": "eslint --concurrency=auto .",
     "lint:fix": "npm run lint -- --fix",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "dependencies": {
     "@heroui/input": "^2.4.28",
diff --git a/packages/har-sanitizer/package.json b/packages/har-sanitizer/package.json
index 5e97270..3f6dd8f 100644
--- a/packages/har-sanitizer/package.json
+++ b/packages/har-sanitizer/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "lint": "eslint --concurrency=auto .",
     "lint:fix": "npm run lint -- --fix",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "dependencies": {
     "@types/har-format": "^1.2.16"
diff --git a/packages/har-sanitizer/tsconfig.json b/packages/har-sanitizer/tsconfig.json
index eb751bd..562939f 100644
--- a/packages/har-sanitizer/tsconfig.json
+++ b/packages/har-sanitizer/tsconfig.json
@@ -4,8 +4,5 @@
   ],
   "include": [
     ".",
-  ],
-  "compilerOptions": {
-    "baseUrl": ".",
-  }
+  ]
 }
\ No newline at end of file
diff --git a/packages/i18n-core/package.json b/packages/i18n-core/package.json
index c0d036c..6c7c713 100644
--- a/packages/i18n-core/package.json
+++ b/packages/i18n-core/package.json
@@ -7,6 +7,6 @@
   "scripts": {
     "lint": "eslint --concurrency=auto .",
     "lint:fix": "npm run lint -- --fix",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   }
 }
diff --git a/packages/i18n-core/tsconfig.json b/packages/i18n-core/tsconfig.json
index eb751bd..562939f 100644
--- a/packages/i18n-core/tsconfig.json
+++ b/packages/i18n-core/tsconfig.json
@@ -4,8 +4,5 @@
   ],
   "include": [
     ".",
-  ],
-  "compilerOptions": {
-    "baseUrl": ".",
-  }
+  ]
 }
\ No newline at end of file
diff --git a/packages/locale/package.json b/packages/locale/package.json
index 3df87a4..dda1655 100644
--- a/packages/locale/package.json
+++ b/packages/locale/package.json
@@ -7,6 +7,6 @@
   "scripts": {
     "lint": "eslint --concurrency=auto .",
     "lint:fix": "npm run lint -- --fix",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   }
 }
diff --git a/packages/locale/tsconfig.json b/packages/locale/tsconfig.json
index eb751bd..562939f 100644
--- a/packages/locale/tsconfig.json
+++ b/packages/locale/tsconfig.json
@@ -4,8 +4,5 @@
   ],
   "include": [
     ".",
-  ],
-  "compilerOptions": {
-    "baseUrl": ".",
-  }
+  ]
 }
\ No newline at end of file
diff --git a/packages/playwright-utils/package.json b/packages/playwright-utils/package.json
index 8cf9b31..c2fef61 100644
--- a/packages/playwright-utils/package.json
+++ b/packages/playwright-utils/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "lint": "eslint --concurrency=auto .",
     "lint:fix": "npm run lint -- --fix",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "devDependencies": {
     "@languages-learner/har-sanitizer": "workspace:*",
diff --git a/packages/react-router-utils/package.json b/packages/react-router-utils/package.json
index 5f6d140..6dd685e 100644
--- a/packages/react-router-utils/package.json
+++ b/packages/react-router-utils/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "lint": "eslint --concurrency=auto .",
     "lint:fix": "npm run lint -- --fix",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "dependencies": {
     "react": "^19.2.0",
diff --git a/packages/react-router-utils/tsconfig.json b/packages/react-router-utils/tsconfig.json
index eb751bd..562939f 100644
--- a/packages/react-router-utils/tsconfig.json
+++ b/packages/react-router-utils/tsconfig.json
@@ -4,8 +4,5 @@
   ],
   "include": [
     ".",
-  ],
-  "compilerOptions": {
-    "baseUrl": ".",
-  }
+  ]
 }
\ No newline at end of file
diff --git a/packages/react-utils/package.json b/packages/react-utils/package.json
index e01a874..aa5162c 100644
--- a/packages/react-utils/package.json
+++ b/packages/react-utils/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "lint": "eslint --concurrency=auto .",
     "lint:fix": "npm run lint -- --fix",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "dependencies": {
     "react": "^19.2.0"
diff --git a/packages/react-utils/tsconfig.json b/packages/react-utils/tsconfig.json
index eb751bd..562939f 100644
--- a/packages/react-utils/tsconfig.json
+++ b/packages/react-utils/tsconfig.json
@@ -4,8 +4,5 @@
   ],
   "include": [
     ".",
-  ],
-  "compilerOptions": {
-    "baseUrl": ".",
-  }
+  ]
 }
\ No newline at end of file
diff --git a/packages/tailwind/package.json b/packages/tailwind/package.json
index f87c43a..11724e2 100644
--- a/packages/tailwind/package.json
+++ b/packages/tailwind/package.json
@@ -8,7 +8,7 @@
   "scripts": {
     "lint": "eslint --concurrency=auto .",
     "lint:fix": "npm run lint -- --fix",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "devDependencies": {
     "@heroui/theme": "^2.4.23",
diff --git a/packages/tailwind/tsconfig.json b/packages/tailwind/tsconfig.json
index ec70878..d093ce8 100644
--- a/packages/tailwind/tsconfig.json
+++ b/packages/tailwind/tsconfig.json
@@ -8,6 +8,5 @@
   ],
   "compilerOptions": {
     "allowJs": true,
-    "baseUrl": ".",
   }
 }
\ No newline at end of file
diff --git a/packages/uikit/package.json b/packages/uikit/package.json
index cf91afe..a270002 100644
--- a/packages/uikit/package.json
+++ b/packages/uikit/package.json
@@ -11,7 +11,7 @@
     "test:component:docker": "pnpm -w run component-tests:test uikit test:component",
     "test:component:update": "npm run test:component -- -update",
     "test:component:update:docker": "pnpm -w run component-tests:test uikit test:component:update",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "dependencies": {
     "@heroui/button": "^2.2.27",
diff --git a/packages/uikit/tsconfig.json b/packages/uikit/tsconfig.json
index acaaa99..60d2c2f 100644
--- a/packages/uikit/tsconfig.json
+++ b/packages/uikit/tsconfig.json
@@ -4,6 +4,7 @@
   ],
   "include": [
     ".",
-    "../playwright-utils/src/types/goToWithLocaleFixture.d.ts"
+    "../playwright-utils/src/types/goToWithLocaleFixture.d.ts",
+    "../../types/assets.d.ts"
   ]
 }
\ No newline at end of file
diff --git a/packages/zod/package.json b/packages/zod/package.json
index 3183e87..042d728 100644
--- a/packages/zod/package.json
+++ b/packages/zod/package.json
@@ -7,7 +7,7 @@
   "scripts": {
     "lint": "eslint --concurrency=auto .",
     "lint:fix": "npm run lint -- --fix",
-    "typecheck": "tsc --noEmit"
+    "typecheck": "tsgo --noEmit"
   },
   "dependencies": {
     "lodash": "^4.17.21"
diff --git a/packages/zod/tsconfig.json b/packages/zod/tsconfig.json
index eb751bd..562939f 100644
--- a/packages/zod/tsconfig.json
+++ b/packages/zod/tsconfig.json
@@ -4,8 +4,5 @@
   ],
   "include": [
     ".",
-  ],
-  "compilerOptions": {
-    "baseUrl": ".",
-  }
+  ]
 }
\ No newline at end of file
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index e0db67b..a891c05 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -47,6 +47,9 @@ importers:
       '@types/react-dom':
         specifier: ^19.2.3
         version: 19.2.3(@types/react@19.2.7)
+      '@typescript/native-preview':
+        specifier: 7.0.0-dev.20260707.2
+        version: 7.0.0-dev.20260707.2
       '@vitest/browser':
         specifier: ^3.1.4
         version: 3.2.4(playwright@1.57.0)(vite@6.4.1(@types/node@22.19.1)(jiti@2.6.1)(lightningcss@1.30.2)(sass@1.94.2)(sugarss@2.0.0)(terser@5.46.0)(tsx@4.21.0)(yaml@2.8.2))(vitest@3.2.4)
@@ -173,7 +176,7 @@ importers:
     devDependencies:
       '@nestjs/cli':
         specifier: ^10.4.8
-        version: 10.4.9(@swc/core@1.15.46(@swc/helpers@0.5.17))
+        version: 10.4.9(@swc/core@1.15.46(@swc/helpers@0.5.17))(esbuild@0.25.12)
       '@nestjs/schematics':
         specifier: ^10.1.1
         version: 10.2.3(chokidar@3.6.0)(typescript@5.7.3)
@@ -3175,6 +3178,53 @@ packages:
     resolution: {integrity: sha512-BmxxndzEWhE4TIEEMBs8lP3MBWN3jFPs/p6gPm/wkv02o41hI6cq9AuSmGAaTTHPtA1FTi2jBre4A9rm5ZmX+Q==}
     engines: {node: ^18.18.0 || ^20.9.0 || >=21.1.0}
 
+  '@typescript/native-preview-darwin-arm64@7.0.0-dev.20260707.2':
+    resolution: {integrity: sha512-wny2pgKjGbiZtnOIHVa3tXC1UfDqxNEFzyPGmiqybedG8hipG2Nfp0l5UxbaKCjkLacUpH/W5bP2hBOMVhCOzg==}
+    engines: {node: '>=16.20.0'}
+    cpu: [arm64]
+    os: [darwin]
+
+  '@typescript/native-preview-darwin-x64@7.0.0-dev.20260707.2':
+    resolution: {integrity: sha512-Afc7M5zOwo+GpfcYwz5Z8HMB2tPVsui7nNIqEuuFB73MPdVqNn/Wmpe4tP4MRri0AtJnJknoHBaTJ/VDAp/Jhw==}
+    engines: {node: '>=16.20.0'}
+    cpu: [x64]
+    os: [darwin]
+
+  '@typescript/native-preview-linux-arm64@7.0.0-dev.20260707.2':
+    resolution: {integrity: sha512-iITBa2WjjTI5N9t5l7Z4KoOSI+2zBlhbvFzsD/f8qX8QoKjz/Y4DPyBDgezYi8nkqjjksbgSOJ3/ykzhwrB9cg==}
+    engines: {node: '>=16.20.0'}
+    cpu: [arm64]
+    os: [linux]
+
+  '@typescript/native-preview-linux-arm@7.0.0-dev.20260707.2':
+    resolution: {integrity: sha512-hJm/UOqZTr9FHmR7uNm8VGX4oKtfWk0Jem0zPeJFNC8ckGUfSBueyiEYMZB+XmRc1aG4x1E46y3CplP4CLHvGQ==}
+    engines: {node: '>=16.20.0'}
+    cpu: [arm]
+    os: [linux]
+
+  '@typescript/native-preview-linux-x64@7.0.0-dev.20260707.2':
+    resolution: {integrity: sha512-du0dzi6y97Po5vDNdPJTyyijHCpaS22JLRnKZEJXBDaO9gCIymOv/5QQokFRuOlQm0bWl3i9PF4OVdGP6uAOQA==}
+    engines: {node: '>=16.20.0'}
+    cpu: [x64]
+    os: [linux]
+
+  '@typescript/native-preview-win32-arm64@7.0.0-dev.20260707.2':
+    resolution: {integrity: sha512-SsAwfhyHJ1akgBc+99z4+hwdbHsdWaKB8EwCNIMA6JfSLMeUjffrYvxu+vfMyxVtOVOz7RrRXRoiDiu4a2sCtg==}
+    engines: {node: '>=16.20.0'}
+    cpu: [arm64]
+    os: [win32]
+
+  '@typescript/native-preview-win32-x64@7.0.0-dev.20260707.2':
+    resolution: {integrity: sha512-DL4u27stv0fo71sVhOzHSwE+YMZsbBijVI+kg5dLDLilSH79WFTJ8RSQ46vJrCMt+Gjlv/JOZP1PuLJDfioYeQ==}
+    engines: {node: '>=16.20.0'}
+    cpu: [x64]
+    os: [win32]
+
+  '@typescript/native-preview@7.0.0-dev.20260707.2':
+    resolution: {integrity: sha512-oUGp+Rep/hqMhPunyinsALUwSlzHINSxitifPiSaeqoKOKD2OlR9NE3TaPqwsl4NlGslsOSUXI1JotWQzpYCPg==}
+    engines: {node: '>=16.20.0'}
+    hasBin: true
+
   '@unrs/resolver-binding-android-arm-eabi@1.11.1':
     resolution: {integrity: sha512-ppLRUgHVaGRWUx0R0Ut06Mjo9gBaBkg3v/8AxusGLhsIotbBLuRk51rAzqLC8gq6NyyAojEXglNjzf6R948DNw==}
     cpu: [arm]
@@ -9315,7 +9365,7 @@ snapshots:
       '@tybys/wasm-util': 0.10.1
     optional: true
 
-  '@nestjs/cli@10.4.9(@swc/core@1.15.46(@swc/helpers@0.5.17))':
+  '@nestjs/cli@10.4.9(@swc/core@1.15.46(@swc/helpers@0.5.17))(esbuild@0.25.12)':
     dependencies:
       '@angular-devkit/core': 17.3.11(chokidar@3.6.0)
       '@angular-devkit/schematics': 17.3.11(chokidar@3.6.0)
@@ -9325,7 +9375,7 @@ snapshots:
       chokidar: 3.6.0
       cli-table3: 0.6.5
       commander: 4.1.1
-      fork-ts-checker-webpack-plugin: 9.0.2(typescript@5.7.2)(webpack@5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17)))
+      fork-ts-checker-webpack-plugin: 9.0.2(typescript@5.7.2)(webpack@5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17))(esbuild@0.25.12))
       glob: 10.4.5
       inquirer: 8.2.6
       node-emoji: 1.11.0
@@ -9334,7 +9384,7 @@ snapshots:
       tsconfig-paths: 4.2.0
       tsconfig-paths-webpack-plugin: 4.2.0
       typescript: 5.7.2
-      webpack: 5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17))
+      webpack: 5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17))(esbuild@0.25.12)
       webpack-node-externals: 3.0.0
     optionalDependencies:
       '@swc/core': 1.15.46(@swc/helpers@0.5.17)
@@ -10942,6 +10992,37 @@ snapshots:
       '@typescript-eslint/types': 8.48.1
       eslint-visitor-keys: 4.2.1
 
+  '@typescript/native-preview-darwin-arm64@7.0.0-dev.20260707.2':
+    optional: true
+
+  '@typescript/native-preview-darwin-x64@7.0.0-dev.20260707.2':
+    optional: true
+
+  '@typescript/native-preview-linux-arm64@7.0.0-dev.20260707.2':
+    optional: true
+
+  '@typescript/native-preview-linux-arm@7.0.0-dev.20260707.2':
+    optional: true
+
+  '@typescript/native-preview-linux-x64@7.0.0-dev.20260707.2':
+    optional: true
+
+  '@typescript/native-preview-win32-arm64@7.0.0-dev.20260707.2':
+    optional: true
+
+  '@typescript/native-preview-win32-x64@7.0.0-dev.20260707.2':
+    optional: true
+
+  '@typescript/native-preview@7.0.0-dev.20260707.2':
+    optionalDependencies:
+      '@typescript/native-preview-darwin-arm64': 7.0.0-dev.20260707.2
+      '@typescript/native-preview-darwin-x64': 7.0.0-dev.20260707.2
+      '@typescript/native-preview-linux-arm': 7.0.0-dev.20260707.2
+      '@typescript/native-preview-linux-arm64': 7.0.0-dev.20260707.2
+      '@typescript/native-preview-linux-x64': 7.0.0-dev.20260707.2
+      '@typescript/native-preview-win32-arm64': 7.0.0-dev.20260707.2
+      '@typescript/native-preview-win32-x64': 7.0.0-dev.20260707.2
+
   '@unrs/resolver-binding-android-arm-eabi@1.11.1':
     optional: true
 
@@ -12932,7 +13013,7 @@ snapshots:
       cross-spawn: 7.0.6
       signal-exit: 4.1.0
 
-  fork-ts-checker-webpack-plugin@9.0.2(typescript@5.7.2)(webpack@5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17))):
+  fork-ts-checker-webpack-plugin@9.0.2(typescript@5.7.2)(webpack@5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17))(esbuild@0.25.12)):
     dependencies:
       '@babel/code-frame': 7.27.1
       chalk: 4.1.2
@@ -12947,7 +13028,7 @@ snapshots:
       semver: 7.7.3
       tapable: 2.3.0
       typescript: 5.7.2
-      webpack: 5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17))
+      webpack: 5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17))(esbuild@0.25.12)
 
   form-data@4.0.5:
     dependencies:
@@ -15861,15 +15942,16 @@ snapshots:
       inherits: 2.0.4
       readable-stream: 3.6.2
 
-  terser-webpack-plugin@5.3.17(@swc/core@1.15.46(@swc/helpers@0.5.17))(webpack@5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17))):
+  terser-webpack-plugin@5.3.17(@swc/core@1.15.46(@swc/helpers@0.5.17))(esbuild@0.25.12)(webpack@5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17))(esbuild@0.25.12)):
     dependencies:
       '@jridgewell/trace-mapping': 0.3.31
       jest-worker: 27.5.1
       schema-utils: 4.3.3
       terser: 5.46.0
-      webpack: 5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17))
+      webpack: 5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17))(esbuild@0.25.12)
     optionalDependencies:
       '@swc/core': 1.15.46(@swc/helpers@0.5.17)
+      esbuild: 0.25.12
 
   terser@5.46.0:
     dependencies:
@@ -16394,7 +16476,7 @@ snapshots:
 
   webpack-virtual-modules@0.6.2: {}
 
-  webpack@5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17)):
+  webpack@5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17))(esbuild@0.25.12):
     dependencies:
       '@types/eslint-scope': 3.7.7
       '@types/estree': 1.0.8
@@ -16416,7 +16498,7 @@ snapshots:
       neo-async: 2.6.2
       schema-utils: 3.3.0
       tapable: 2.3.0
-      terser-webpack-plugin: 5.3.17(@swc/core@1.15.46(@swc/helpers@0.5.17))(webpack@5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17)))
+      terser-webpack-plugin: 5.3.17(@swc/core@1.15.46(@swc/helpers@0.5.17))(esbuild@0.25.12)(webpack@5.97.1(@swc/core@1.15.46(@swc/helpers@0.5.17))(esbuild@0.25.12))
       watchpack: 2.5.1
       webpack-sources: 3.3.4
     transitivePeerDependencies:
diff --git a/stylelint.config.mjs b/stylelint.config.mjs
index 4064da4..a001bf6 100644
--- a/stylelint.config.mjs
+++ b/stylelint.config.mjs
@@ -5,6 +5,18 @@ export default {
         "stylelint-config-standard-scss",
         "stylelint-config-rational-order",
     ],
+    // Never lint build output — the globs (`**/*.{css,scss}`) would otherwise pick up
+    // bundled/minified CSS in gitignored dirs like `apps/web/dist`.
+    ignoreFiles: [
+        "**/dist/**",
+        "**/dist-ssr/**",
+        "**/dist-docker/**",
+        "**/dist-storybook/**",
+        "**/dev-dist/**",
+        "**/storybook-static/**",
+        "**/.typecheck/**",
+        "**/coverage/**",
+    ],
     rules: {
         "selector-pseudo-class-no-unknown": [
             true,
diff --git a/types/assets.d.ts b/types/assets.d.ts
new file mode 100644
index 0000000..8cb0868
--- /dev/null
+++ b/types/assets.d.ts
@@ -0,0 +1,13 @@
+// Ambient declarations for style side-effect imports (`import "./x.scss"`).
+// TypeScript 7 / tsgo reports TS2882 for side-effect imports without a module
+// declaration, whereas tsc <=5.7 silently tolerated them. Shared across packages
+// that compile UI source (directly or transitively through `@languages-learner/uikit`).
+declare module "*.scss" {
+    const content: Record<string, string>;
+    export default content;
+}
+
+declare module "*.css" {
+    const content: Record<string, string>;
+    export default content;
+}