diff --git a/.opencode/scripts/project_contract.py b/.opencode/scripts/project_contract.py
index 7de965f..c8a19b2 100644
--- a/.opencode/scripts/project_contract.py
+++ b/.opencode/scripts/project_contract.py
@@ -51,6 +51,7 @@ STACK_REQUIRED: dict[str, list[str]] = {
         "tailwind",
         "shadcn",
         "typescript",
+        "mobile-first",
     ],
     "mcp-server": ["fastapi", "mcp", "patchright", "uv"],
     "cli": ["typer", "uv", "hatchling", "ruff", "mypy", "pytest"],
diff --git a/.opencode/skills/audit/SKILL.md b/.opencode/skills/audit/SKILL.md
index cc83e21..d874431 100644
--- a/.opencode/skills/audit/SKILL.md
+++ b/.opencode/skills/audit/SKILL.md
@@ -96,6 +96,7 @@ REVIEW → MERGE).
 - service-слой пропущен (routes → db/models без services/)
 - файлы длиннее 200-300 строк (декомпозиция)
 - mixing concerns (бизнес-логика ≠ транспорт ≠ представление)
+- mobile-first missing (fullstack): нет PWA manifest, нет Playwright mobile spec, нет axe a11y spec, нет viewport meta — `STACK_REQUIRED["fullstack"]` требует "mobile-first", но качественно проверь что mobile-first реален, а не просто слово в stack.md
 
 Для каждой находки верни:
 {category: "Code-standards", problem: "<name>: <detail>", path: "<file:line>", severity: "warn"|"fail"}
diff --git a/.opencode/skills/code-standards/SKILL.md b/.opencode/skills/code-standards/SKILL.md
index e395fba..0b998ec 100644
--- a/.opencode/skills/code-standards/SKILL.md
+++ b/.opencode/skills/code-standards/SKILL.md
@@ -104,7 +104,7 @@ src/<package>/
 
 ### Fullstack (кратко)
 
-Backend as above (in `backend/` + `frontend/` separation). Frontend: SvelteKit co-located `*.test.ts` в `src/lib/`, `e2e/*.spec.ts` для Playwright. НЕ смешивать backend код в `frontend/` и наоборот.
+Backend as above (in `backend/` + `frontend/` separation). Frontend: SvelteKit co-located `*.test.ts` в `src/lib/`, `e2e/*.spec.ts` для Playwright. НЕ смешивать backend код в `frontend/` и наоборот. + mobile-first (PWA + Playwright mobile + axe a11y) — silent enforcement через `STACK_REQUIRED["fullstack"]`.
 
 ### CLI (кратко)
 
diff --git a/.opencode/skills/spec/SKILL.md b/.opencode/skills/spec/SKILL.md
index e45478b..681ff82 100644
--- a/.opencode/skills/spec/SKILL.md
+++ b/.opencode/skills/spec/SKILL.md
@@ -42,7 +42,7 @@ truth для порядка и действий — `spec-status` tool. На в
 Общий для всех типов: Python 3.12+, uv, hatchling, ruff, mypy strict, pytest 90% cov, xenon, pre-commit, .editorconfig, .gitignore, LICENSE MIT, dependabot, CI.
 
 - **backend**: FastAPI + uvicorn, Tortoise ORM (встроенные миграции `tortoise makemigrations`, НЕ Aerich — legacy), Pydantic v2 + pydantic-settings, Loguru, опц. JWT-auth (`passlib[bcrypt]` + `pyjwt`)
-- **fullstack**: backend + frontend/ (SvelteKit + Svelte 5 runes (TS) + Tailwind v4 + shadcn-svelte + Biome + Vitest + Knip)
+- **fullstack**: backend + frontend/ (SvelteKit + Svelte 5 runes (TS) + Tailwind v4 + shadcn-svelte + Biome + Vitest + Knip + mobile-first (PWA + axe + Playwright mobile))
 - **mcp-server**: FastAPI + MCP SDK, Patchright/Playwright over CDP, X-API-Key
 - **cli**: Typer (default) / click / argparse, hatchling build
 - **bot**: aiogram 3.x, FastAPI webhook/polling, Tortoise (опц.), Pydantic AI (опц.)
@@ -88,7 +88,7 @@ backend:
 - Auth: [1] none v1 / [2] JWT / [3] X-API-Key
 
 fullstack:
-- frontend: [1] SvelteKit + Svelte 5 + Tailwind v4 + shadcn-svelte (default) / [2] add later
+- frontend: [1] SvelteKit + Svelte 5 + Tailwind v4 + shadcn-svelte (default, mobile-first: PWA + axe + Playwright mobile — silent) / [2] add later
 - DB: (same as backend)
 - Auth: (same as backend)
 
@@ -236,7 +236,7 @@ Spec complete. Issues: #N1, #N2, ...
 Default stack для типа (хардкод, добавить всегда):
 - Общий: Python 3.12+, uv, hatchling, ruff, mypy strict, pytest 90% cov, xenon, pre-commit, .editorconfig, .gitignore, LICENSE MIT, dependabot, CI
 - backend: FastAPI + uvicorn, Tortoise ORM (встроенные миграции `tortoise makemigrations`, НЕ Aerich), Pydantic v2 + pydantic-settings, Loguru, опц. JWT-auth (`passlib[bcrypt]` + `pyjwt`)
-- fullstack: + frontend/ (SvelteKit + Svelte 5 runes (TS) + Tailwind v4 + shadcn-svelte + Biome + Vitest + Knip)
+- fullstack: + frontend/ (SvelteKit + Svelte 5 runes (TS) + Tailwind v4 + shadcn-svelte + Biome + Vitest + Knip + mobile-first (PWA + axe + Playwright mobile))
 - mcp-server: FastAPI + MCP SDK, Patchright/Playwright over CDP, X-API-Key
 - cli: Typer (default) / click / argparse, hatchling build
 - bot: aiogram 3.x, FastAPI webhook/polling, Tortoise (опц.), Pydantic AI (опц.)
diff --git a/.opencode/templates/fullstack/{{cookiecutter.project_name}}/.github/workflows/ci.yml b/.opencode/templates/fullstack/{{cookiecutter.project_name}}/.github/workflows/ci.yml
index 688653a..815a277 100644
--- a/.opencode/templates/fullstack/{{cookiecutter.project_name}}/.github/workflows/ci.yml
+++ b/.opencode/templates/fullstack/{{cookiecutter.project_name}}/.github/workflows/ci.yml
@@ -46,9 +46,21 @@ jobs:
       - run: npm run lint
       - run: npm test
 
-  build:
+  frontend-e2e:
     runs-on: ubuntu-latest
-    needs: [backend-lint, backend-typecheck, backend-test, frontend-test]
+    defaults: { run: { working-directory: frontend } }
     steps:
       - uses: actions/checkout@v4
-      - run: echo "All checks passed"
\ No newline at end of file
+      - uses: actions/setup-node@v4
+        with: { node-version: '20' }
+      - run: npm install
+      - run: npx playwright install --with-deps
+      - run: npm run build
+      - run: npm run test:e2e
+
+  build:
+    runs-on: ubuntu-latest
+    needs: [backend-lint, backend-typecheck, backend-test, frontend-test, frontend-e2e]
+    steps:
+      - uses: actions/checkout@v4
+      - run: echo "All checks passed"
diff --git a/.opencode/tools/project-status.ts b/.opencode/tools/project-status.ts
index d5ae0b3..33e7c77 100644
--- a/.opencode/tools/project-status.ts
+++ b/.opencode/tools/project-status.ts
@@ -4,7 +4,7 @@ import { tool } from "@opencode-ai/plugin"
 
 export default tool({
   description:
-    "Project status oracle. Read-only check of repo architecture conformance. Auto-detects project type (frontend→fullstack, fastapi→backend, typer→cli, aiogram→bot, prefect→worker) and runs 8 check groups: Структура, Тонкие роуты (AST ≤50 lines), Качество кода (mypy/ruff/pytest), Тесты (conftest, stub-detector, no @pytest.mark.asyncio), README (12 delimiter tags), Infra (branch protection, ci.yml, dependabot, LICENSE, pre-commit), Coverage (non-blocking), Pyproject (13 checks: build-system, hatch wheel, project fields, ruff/mypy/pytest config, coverage, pre-commit, uv.lock, requires-python vs .python-version). Issue #275: all checks are non-blocking (WARN) and the exit code is always 0 (informational mode); check=true is accepted for CLI compatibility but no longer forces exit 1; pass fast=true to skip slow/remote checks (branch protection); pass repo=<path> to check an arbitrary repo instead of the current worktree.",
+    "Project status oracle. Read-only check of repo architecture conformance. Auto-detects project type (frontend→fullstack, fastapi→backend, typer→cli, aiogram→bot, prefect→worker) and runs 8 check groups: Структура (incl. mobile-first PWA + Playwright mobile + axe a11y for fullstack), Тонкие роуты (AST ≤50 lines), Качество кода (mypy/ruff/pytest), Тесты (conftest, stub-detector, no @pytest.mark.asyncio), README (12 delimiter tags), Infra (branch protection, ci.yml, dependabot, LICENSE, pre-commit), Coverage (non-blocking), Pyproject (13 checks: build-system, hatch wheel, project fields, ruff/mypy/pytest config, coverage, pre-commit, uv.lock, requires-python vs .python-version). Issue #275: all checks are non-blocking (WARN) and the exit code is always 0 (informational mode); check=true is accepted for CLI compatibility but no longer forces exit 1; pass fast=true to skip slow/remote checks (branch protection); pass repo=<path> to check an arbitrary repo instead of the current worktree.",
   args: {
     check: tool.schema.boolean().optional().describe("Accepted for CLI compatibility — issue #275: exit code is always 0 (all checks WARN, non-blocking)"),
     fast: tool.schema.boolean().optional().describe("If true, skip slow/remote checks (branch protection via gh)"),
diff --git a/tests/test_cookiecutter_templates.py b/tests/test_cookiecutter_templates.py
index 1626aac..26d5054 100644
--- a/tests/test_cookiecutter_templates.py
+++ b/tests/test_cookiecutter_templates.py
@@ -402,6 +402,30 @@ def test_fullstack_uses_typescript(render):
     assert "tw-animate" not in deps or "tw-animate-css" in deps
 
 
+@pytest.mark.parametrize("template_name, extra_context", [("fullstack", {"project_name": "fs"})])
+def test_fullstack_ci_has_frontend_e2e_job(render):
+    """Root ci.yml has a ``frontend-e2e`` job that installs deps without a
+    lockfile (``npm install``, NOT ``npm ci``), wires Playwright, and runs
+    in the ``frontend/`` working directory.
+
+    Regression guard for PR#281 review critical #1: cookiecutter templates
+    ship no ``package-lock.json``, so ``npm ci`` fails in fresh projects.
+    """
+    ci = (render / ".github/workflows/ci.yml").read_text()
+    assert "frontend-e2e" in ci, "ci.yml must define a frontend-e2e job"
+    assert "npm install" in ci, "ci.yml must use npm install (no lockfile in template)"
+    assert "npm ci" not in ci, (
+        "ci.yml must NOT use npm ci (cookiecutter template has no package-lock.json)"
+    )
+    assert "playwright install --with-deps" in ci, (
+        "ci.yml must install Playwright browsers with --with-deps"
+    )
+    assert "test:e2e" in ci, "ci.yml must run the e2e suite (npm run test:e2e)"
+    assert "working-directory: frontend" in ci, (
+        "ci.yml must run frontend steps in the frontend/ working directory"
+    )
+
+
 # ── pyproject.toml completeness ──────────────────────────────────────────────