diff --git a/docs/best-practices.md b/docs/best-practices.md
index 674993f2..578e6368 100644
--- a/docs/best-practices.md
+++ b/docs/best-practices.md
@@ -61,10 +61,10 @@ session.add_suite(integration_suite)
 # DON'T DO THIS - 500 lines of mixed fixtures/suites/tests
 session = ProTestSession()
 
-@fixture()
+@fixture
 def db(): ...
 
-@fixture()
+@fixture
 def cache(): ...
 
 session.bind(db)
@@ -164,7 +164,7 @@ di_suite = ProTestSuite(
 |-------|-----------------|----------|
 | Session | `session.py` or `fixtures.py` | Database, expensive resources |
 | Suite | Suite file | Suite-specific setup |
-| Test | Near test, `@fixture()` | Test isolation, cheap resources |
+| Test | Near test, `@fixture` | Test isolation, cheap resources |
 
 ### Session Fixtures: Expensive Resources
 
@@ -189,7 +189,7 @@ from protest import ProTestSuite, fixture
 
 api_suite = ProTestSuite("API")
 
-@fixture()
+@fixture
 async def authenticated_client(
     db: Annotated[Database, Use(database)]
 ) -> AsyncGenerator[APIClient, None]:
@@ -204,8 +204,8 @@ api_suite.bind(authenticated_client)
 ### Test Fixtures: Fresh Per Test
 
 ```python
-# Use @fixture() (not scoped) for per-test isolation
-@fixture()
+# Use @fixture (not scoped) for per-test isolation
+@fixture
 def request_payload() -> dict:
     return {"name": "test", "value": 42}
 ```
@@ -284,13 +284,13 @@ ProTestSuite("Misc")            # Bad
 
 ```python
 # Name after what they provide
-@fixture()
+@fixture
 def database(): ...      # Provides a database
 
 @factory()
 def user(): ...          # Provides a user (becomes user_factory in tests)
 
-@fixture()
+@fixture
 def api_client(): ...    # Provides an API client
 ```
 
@@ -435,12 +435,12 @@ def convert_video(input_path: str, output_path: str) -> ConversionResult:
 
 ```python
 # BAD: Should be test-scoped but bound to session
-@fixture()
+@fixture
 def request_id(): ...
 session.bind(request_id)  # Fresh value needed per test!
 
 # GOOD: Test-scoped (not bound)
-@fixture()
+@fixture
 def request_id() -> str:
     return str(uuid4())
 ```
@@ -508,4 +508,4 @@ async def test_draft_cannot_be_archived_directly(
 - [Fixtures](core-concepts/fixtures.md)
 - [Factories](core-concepts/factories.md)
 - [Tags](core-concepts/tags.md) - Tag inheritance and filtering
-- [CLI Reference](cli.md)
+- [CLI Reference](cli.md)
\ No newline at end of file
diff --git a/docs/core-concepts/dependency-injection.md b/docs/core-concepts/dependency-injection.md
index 3e3d3e30..7b6af1a4 100644
--- a/docs/core-concepts/dependency-injection.md
+++ b/docs/core-concepts/dependency-injection.md
@@ -12,7 +12,7 @@ from protest import ProTestSession, Use, fixture
 
 session = ProTestSession()
 
-@fixture()
+@fixture
 def database():
     return Database()
 
@@ -65,11 +65,11 @@ def undefined_fixture():
 Fixtures can depend on other fixtures:
 
 ```python
-@fixture()
+@fixture
 def config():
     return {"db_url": "postgres://localhost"}
 
-@fixture()
+@fixture
 async def database(cfg: Annotated[dict, Use(config)]):
     return await connect(cfg["db_url"])
 
@@ -109,11 +109,11 @@ If two tests both use `database`, and `database` is session-scoped, they share t
 Raised when a fixture depends on a narrower scope:
 
 ```python
-@fixture()  # Test scope (not bound)
+@fixture  # Test scope (not bound)
 def per_test():
     return "fresh"
 
-@fixture()
+@fixture
 def shared(x: Annotated[str, Use(per_test)]):
     return x
 
diff --git a/docs/core-concepts/factories.md b/docs/core-concepts/factories.md
index 29309d00..b75ca553 100644
--- a/docs/core-concepts/factories.md
+++ b/docs/core-concepts/factories.md
@@ -129,7 +129,7 @@ If a test creates `alice` then `bob`, teardown runs `bob` first, then `alice`.
 Factories can depend on other fixtures:
 
 ```python
-@fixture()
+@fixture
 def database():
     return Database()
 
diff --git a/docs/core-concepts/fixtures.md b/docs/core-concepts/fixtures.md
index e0383ecd..4a9c919e 100644
--- a/docs/core-concepts/fixtures.md
+++ b/docs/core-concepts/fixtures.md
@@ -4,12 +4,12 @@ Fixtures provide reusable setup and teardown logic for tests.
 
 ## What is a Fixture?
 
-A fixture is a function decorated with `@fixture()` that provides a value to tests.
+A fixture is a function decorated with `@fixture` that provides a value to tests.
 
 ```python
 from protest import fixture
 
-@fixture()
+@fixture
 def config():
     return {"debug": True}
 ```
@@ -18,7 +18,7 @@ def config():
 
 **Important:** Fixture scope is determined by WHERE you bind it, not by the decorator.
 
-The `@fixture()` decorator only marks a function as a fixture. The scope is set when you bind the fixture to a session or suite.
+The `@fixture` decorator only marks a function as a fixture. The scope is set when you bind the fixture to a session or suite.
 
 ### Session Scope
 
@@ -27,7 +27,7 @@ Bind to session with `session.bind()`. Lives for the entire test session.
 ```python
 from protest import fixture, ProTestSession
 
-@fixture()
+@fixture
 async def database():
     db = await connect()
     yield db
@@ -46,7 +46,7 @@ Bind to suite with `suite.bind()`. Lives for the duration of the suite.
 ```python
 from protest import fixture, ProTestSuite
 
-@fixture()
+@fixture
 def api_client(db: Annotated[Database, Use(database)]):
     return Client(db)
 
@@ -61,7 +61,7 @@ Use case: Resources shared within a group of related tests.
 Don't bind the fixture. Fresh instance for each test.
 
 ```python
-@fixture()
+@fixture
 def request_id():
     return str(uuid.uuid4())
 
@@ -83,7 +83,7 @@ Use case: Isolated state per test, unique IDs, temporary files.
 Use `yield` to separate setup from teardown:
 
 ```python
-@fixture()
+@fixture
 async def database():
     # Setup
     db = await connect()
@@ -111,11 +111,11 @@ A fixture can only depend on fixtures with equal or wider scope:
 Violating this raises `ScopeMismatchError`:
 
 ```python
-@fixture()
+@fixture
 def per_test_data():
     return "per-test"
 
-@fixture()
+@fixture
 def shared_resource(x: Annotated[str, Use(per_test_data)]):
     return x
 
@@ -210,7 +210,7 @@ async def rate_limited_api():
     """Only 2 concurrent requests allowed."""
     yield ApiClient()
 
-@fixture()
+@fixture
 async def user_service(api: Annotated[ApiClient, Use(rate_limited_api)]):
     """Service that uses the rate-limited API."""
     yield UserService(api)
@@ -242,7 +242,7 @@ Autouse fixtures are automatically resolved at their scope start, without being
 ### Session Autouse
 
 ```python
-@fixture()
+@fixture
 def configure_logging():
     logging.basicConfig(level=logging.DEBUG)
     yield
@@ -256,7 +256,7 @@ Session autouse fixtures are resolved at `SESSION_SETUP_START`, before any test
 ### Suite Autouse
 
 ```python
-@fixture()
+@fixture
 def clear_environment():
     old = os.environ.copy()
     os.environ.clear()
@@ -280,10 +280,10 @@ Don't use autouse when tests need the fixture's value - use explicit `Use()` ins
 
 ## Plain Functions
 
-All fixtures must be decorated with `@fixture()`. Plain functions raise `PlainFunctionError` when used with `Use()`:
+All fixtures must be decorated with `@fixture`. Plain functions raise `PlainFunctionError` when used with `Use()`:
 
 ```python
-def not_a_fixture():  # Missing @fixture()!
+def not_a_fixture():  # Missing @fixture!
     return "value"
 
 @session.test()
diff --git a/docs/core-concepts/sessions-and-suites.md b/docs/core-concepts/sessions-and-suites.md
index 5daa7bd6..f4603624 100644
--- a/docs/core-concepts/sessions-and-suites.md
+++ b/docs/core-concepts/sessions-and-suites.md
@@ -39,7 +39,7 @@ Bind fixtures to the session with `bind()`:
 ```python
 from protest import fixture
 
-@fixture()
+@fixture
 def database():
     db = connect()
     yield db
@@ -79,7 +79,7 @@ api_suite = ProTestSuite(
 Bind fixtures to a suite with `bind()`:
 
 ```python
-@fixture()
+@fixture
 def api_client():
     return Client()
 
@@ -124,7 +124,7 @@ orders_suite.full_path # "API::Orders"
 Child suites can access fixtures from parent suites:
 
 ```python
-@fixture()
+@fixture
 def api_client():
     return Client()
 
diff --git a/docs/core-concepts/tags.md b/docs/core-concepts/tags.md
index 27514096..e90952ea 100644
--- a/docs/core-concepts/tags.md
+++ b/docs/core-concepts/tags.md
@@ -46,7 +46,7 @@ session.bind(db)
 
 
 # Fixture that depends on db - inherits "database" tag
-@fixture()
+@fixture
 def user_repository(db: Annotated[Database, Use(db)]):
     return UserRepository(db)
 
@@ -54,7 +54,7 @@ session.bind(user_repository)
 
 
 # Fixture that depends on user_repository - also inherits "database"
-@fixture()
+@fixture
 def user_service(repo: Annotated[UserRepository, Use(user_repository)]):
     return UserService(repo)
 
diff --git a/docs/core-concepts/tests.md b/docs/core-concepts/tests.md
index 09b173bf..7c5ce3e7 100644
--- a/docs/core-concepts/tests.md
+++ b/docs/core-concepts/tests.md
@@ -36,7 +36,7 @@ Tests declare their dependencies using type annotations:
 from typing import Annotated
 from protest import Use, fixture
 
-@fixture()
+@fixture
 def database():
     return Database()
 
@@ -175,7 +175,7 @@ ProTest evaluates skip conditions **after** fixture resolution, so your callable
 from typing import Annotated
 from protest import Use, fixture
 
-@fixture()
+@fixture
 def environment():
     return {"is_ci": os.getenv("CI") == "true"}
 
diff --git a/docs/faq.md b/docs/faq.md
index f46c9cf2..6e7137b3 100644
--- a/docs/faq.md
+++ b/docs/faq.md
@@ -29,7 +29,7 @@ from typing import Annotated
 user_suite = ProTestSuite("User")
 
 
-@fixture()
+@fixture
 def user():
     return User("alice")
 
@@ -95,12 +95,12 @@ If fixtures could use `From()`, you'd get hidden cartesian products:
 ```python
 # Hypothetical - NOT SUPPORTED (decorator syntax doesn't exist either)
 # If this were possible:
-@fixture()
+@fixture
 def db(engine: Annotated[str, From(ENGINES)]):  # 3 engines
     ...
 session.bind(db)
 
-@fixture()
+@fixture
 def user(role: Annotated[str, From(ROLES)], db: ...):  # 2 roles
     ...
 session.bind(user)
@@ -164,5 +164,4 @@ async def test_pipeline() -> None:
     assert result.success
 ```
 
-See `examples/subprocess_capture/session.py` for complete examples and [Built-ins](core-concepts/builtins.md#shell) for full API.
-
+See `examples/subprocess_capture/session.py` for complete examples and [Built-ins](core-concepts/builtins.md#shell) for full API.
\ No newline at end of file
diff --git a/docs/getting-started/quickstart.md b/docs/getting-started/quickstart.md
index c33ba08a..a01ca775 100644
--- a/docs/getting-started/quickstart.md
+++ b/docs/getting-started/quickstart.md
@@ -21,7 +21,7 @@ session.add_suite(api_suite)
 # Define a test-scoped fixture (fresh instance per test)
 # For session scope: session.bind(fixture_fn)
 # For suite scope: suite.bind(fixture_fn)
-@fixture()
+@fixture
 def config():
     return {"api_url": "https://api.example.com"}
 
diff --git a/docs/guides/pytest-to-protest.md b/docs/guides/pytest-to-protest.md
index 5be1c0b9..53c9577c 100644
--- a/docs/guides/pytest-to-protest.md
+++ b/docs/guides/pytest-to-protest.md
@@ -58,11 +58,11 @@ def test_user_in_db(user, db):
 from protest import fixture, Use
 from typing import Annotated
 
-@fixture()
+@fixture
 def user():
     return User(name="test")
 
-@fixture()
+@fixture
 def db():
     conn = connect()
     yield conn  # teardown after yield
@@ -191,15 +191,15 @@ from protest import fixture, ProTestSession, ProTestSuite
 session = ProTestSession()
 suite = ProTestSuite("MyTests")
 
-@fixture()
+@fixture
 def expensive_resource():
     return load_heavy_data()
 
-@fixture()
+@fixture
 def per_suite_db():
     return create_db()
 
-@fixture()  # default: TEST scope (no binding needed)
+@fixture  # default: TEST scope (no binding needed)
 def per_test_data():
     return fresh_data()
 
@@ -278,7 +278,7 @@ def test_todo():
     pass
 
 # Runtime skip condition with fixtures
-@fixture()
+@fixture
 def has_redis():
     return shutil.which("redis-server") is not None
 
@@ -364,7 +364,7 @@ async def test_async_operation():
     assert result
 
 # Async fixtures work naturally
-@fixture()
+@fixture
 async def async_client():
     async with aiohttp.ClientSession() as session:
         yield session
@@ -475,10 +475,11 @@ protest run myapp.tests.session:session --lf
 ## Migration Checklist
 
 1. **Create a session file** with `ProTestSession()`
-2. **Convert fixtures to ProTest syntax** (`@fixture()`, `@factory()`)
+2. **Convert fixtures to ProTest syntax** (`@fixture`, `@factory()`)
 3. **Create suites** to group related tests
 4. **Bind fixtures** to suites with appropriate scopes
 5. **Convert test functions** with explicit `Annotated[T, Use(fixture)]`
 6. **Replace `@pytest.mark.parametrize`** with `ForEach` + `From`
 7. **Replace built-ins** (`tmp_path`, `caplog`, `mocker`)
 8. **Update CI/CD** to use `protest run` command
+9. 
\ No newline at end of file
diff --git a/docs/guides/testing-fastapi.md b/docs/guides/testing-fastapi.md
index fb96aae4..f9f9a9d2 100644
--- a/docs/guides/testing-fastapi.md
+++ b/docs/guides/testing-fastapi.md
@@ -69,7 +69,7 @@ from protest import fixture
 from myapp.app import app
 
 
-@fixture()
+@fixture
 async def client() -> AsyncIterator[httpx.AsyncClient]:
     async with LifespanManager(app) as manager:
         transport = httpx.ASGITransport(app=manager.app)
@@ -144,7 +144,7 @@ from protest import fixture
 from myapp.app import app
 
 
-@fixture()
+@fixture
 async def client() -> AsyncIterator[httpx.AsyncClient]:
     async with LifespanManager(app) as manager:
         transport = httpx.ASGITransport(app=manager.app)
@@ -239,7 +239,7 @@ class _LifespanWrapper:
         await self.app(scope, receive, send)
 
 
-@fixture()
+@fixture
 async def client() -> AsyncIterator[httpx.AsyncClient]:
     async with lifespan(app) as state:
         wrapped = _LifespanWrapper(app, state)
diff --git a/docs/index.md b/docs/index.md
index 98b68902..da540680 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -37,7 +37,7 @@ Tag a fixture once, and **every test using it inherits the tag automatically**
 def db(): ...
 session.bind(db)
 
-@fixture()
+@fixture
 def user_repo(db: Annotated[DB, Use(db)]): ...  # Inherits "database" tag
 session.bind(user_repo)
 
@@ -94,7 +94,7 @@ from protest import ProTestSession, Use, fixture
 
 session = ProTestSession()
 
-@fixture()
+@fixture
 def database():
     return {"connected": True}
 
diff --git a/docs/internals/dependency-injection.md b/docs/internals/dependency-injection.md
index 4b5cb58d..20849814 100644
--- a/docs/internals/dependency-injection.md
+++ b/docs/internals/dependency-injection.md
@@ -62,12 +62,12 @@ A fixture can only depend on fixtures with **equal or wider** scope:
 Violating this raises `ScopeMismatchError`:
 
 ```python
-@fixture()  # Test scope (not bound)
+@fixture  # Test scope (not bound)
 def per_test():
     return "fresh"
 
 
-@fixture()
+@fixture
 def shared(x: Annotated[str, Use(per_test)]):
     pass
 
@@ -113,7 +113,7 @@ wait for the first resolution to complete, then share the cached value.
 Generator fixtures use `yield` to separate setup from teardown:
 
 ```python
-@fixture()
+@fixture
 async def database():
     db = await connect()  # Setup
     yield db  # Value used by tests
@@ -239,4 +239,4 @@ class FixtureDurationPlugin(PluginBase):
 - [Fixtures](../core-concepts/fixtures.md) - User guide for fixtures
 - [Factories](../core-concepts/factories.md) - Factory fixtures
 - [Events](events.md) - Complete event reference
-- [Plugins](plugins.md) - Plugin development guide
+- [Plugins](plugins.md) - Plugin development guide
\ No newline at end of file
diff --git a/protest/di/decorators.py b/protest/di/decorators.py
index 18b07772..47d6ffb2 100644
--- a/protest/di/decorators.py
+++ b/protest/di/decorators.py
@@ -7,7 +7,7 @@
 
 import functools
 from collections.abc import Callable
-from typing import Any, Generic, TypeVar
+from typing import Any, Generic, TypeVar, overload
 
 from protest.di.validation import validate_no_from_params
 from protest.entities import FixtureMarker, FixtureRegistration
@@ -43,10 +43,25 @@ def unwrap_fixture(func: Callable[..., Any]) -> Callable[..., Any]:
     return func
 
 
+@overload
+def fixture(_func: FuncT, /) -> FixtureWrapper[FuncT]: ...
+
+
+@overload
 def fixture(
+    *,
     tags: list[str] | None = None,
     max_concurrency: int | None = None,
-) -> Callable[[FuncT], FixtureWrapper[FuncT]]:
+) -> Callable[[FuncT], FixtureWrapper[FuncT]]: ...
+
+
+def fixture(
+    _func: FuncT | None = None,
+    /,
+    *,
+    tags: list[str] | None = None,
+    max_concurrency: int | None = None,
+) -> FixtureWrapper[FuncT] | Callable[[FuncT], FixtureWrapper[FuncT]]:
     """Decorator to mark a function as a fixture.
 
     Scope is determined at binding time:
@@ -103,6 +118,9 @@ def decorator(func: FuncT) -> FixtureWrapper[FuncT]:
         )
         return FixtureWrapper(func, registration)
 
+    if _func is not None:
+        return decorator(_func)
+
     return decorator
 
 
diff --git a/protest/fixtures/builtins.py b/protest/fixtures/builtins.py
index f649c146..63c61da2 100644
--- a/protest/fixtures/builtins.py
+++ b/protest/fixtures/builtins.py
@@ -8,7 +8,7 @@
 from protest.fixtures.mocker import Mocker
 
 
-@fixture()
+@fixture
 def tmp_path() -> Generator[Path, None, None]:
     """Provide a temporary directory that is cleaned up after the test.
 
@@ -23,14 +23,14 @@ def test_file_ops(tmp: Annotated[Path, Use(tmp_path)]):
         yield Path(tmpdir)
 
 
-@fixture()
+@fixture
 def caplog() -> LogCapture:
     """Capture log records during a test."""
     records = get_current_log_records()
     return LogCapture(records)
 
 
-@fixture()
+@fixture
 def mocker() -> Generator[Mocker, None, None]:
     """Provide a mocker for patching and mocking during tests."""
     mock_manager = Mocker()