## SpecStory

## Implementation of TODO.md Phases (04/03/2025, 06:19:21)

_**User**_

Implement Phase 1, 2, 3 from @TODO.md 

---

_**Assistant**_

I'll help you implement the tasks from Phases 1, 2, and 3 in the TODO.md file. Let's start by exploring the codebase to understand the structure and identify the files that need to be modified.

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Now, let's look at the specific issues mentioned in Phase 1 and 2 to identify the files we need to modify.

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<details>
            <summary>Searched codebase "TypeVar "T" and "R" in core.py" • **25** results</summary>
        
| File | Lines |
|------|-------|
| `src/twat_fs/upload_providers/protocols.py` | L1-24 |
| `src/twat_fs/upload_providers/core.py` | L1-41 |
| `src/twat_fs/upload_providers/utils.py` | L1-58 |
| `src/twat_fs/upload.py` | L1-44 |
| `src/twat_fs/upload_providers/core.py` | L41-47 |
| `twat_search.txt` | L559-598 |
| `CLEANUP.txt` | L647-703 |
| `TODO.md` | L1-53 |
| `twat_search.txt` | L973-999 |
| `pyproject.toml` | L263-352 |
| `src/twat_fs/upload_providers/core.py` | L126-173 |
| `src/twat_fs/upload_providers/core.py` | L173-219 |
| `src/twat_fs/upload_providers/core.py` | L71-93 |
| `src/twat_fs/upload_providers/__init__.py` | L1-63 |
| `src/twat_fs/upload_providers/simple.py` | L50-107 |
| `twat_search.txt` | L518-559 |
| `src/twat_fs/upload_providers/core.py` | L57-63 |
| `src/twat_fs/upload_providers/core.py` | L51-57 |
| `src/twat_fs/upload_providers/core.py` | L67-71 |
| `src/twat_fs/upload_providers/factory.py` | L1-40 |
| `src/twat_fs/upload_providers/core.py` | L63-67 |
| `src/twat_fs/upload_providers/core.py` | L47-51 |
| `.specstory/history/2025-03-04_04-43-incorporating-ideas-from-ideas-md-into-todo-md.md` | L4022-4086 |
| `src/twat_fs/upload_providers/simple.py` | L1-50 |
| `tests/test_upload.py` | L1-37 |

</details>

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Let's look at the failing tests to understand what needs to be fixed:

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<details>
            <summary>Searched codebase "TestCreateProviderInstance TestLogUploadAttempt TestGatherWithConcurrency" • **25** results</summary>
        
| File | Lines |
|------|-------|
| `.specstory/history/2025-03-04_05-33-implementing-todo-phases-1,-2,-and-3.md` | L3776-3809 |
| `.specstory/history/2025-03-04_05-33-implementing-todo-phases-1,-2,-and-3.md` | L4018-4103 |
| `twat_search.txt` | L1929-1962 |
| `tests/test_utils.py` | L227-271 |
| `tests/test_utils.py` | L271-280 |
| `twat_search.txt` | L1271-1306 |
| `tests/test_utils.py` | L1-42 |
| `tests/test_utils.py` | L322-344 |
| `.specstory/history/2025-03-04_03-45-refining-todo-list-from-codebase-review.md` | L1810-1871 |
| `tests/test_async_utils.py` | L1-67 |
| `src/twat_fs/upload_providers/async_utils.py` | L155-185 |
| `.specstory/history/2025-03-04_05-33-implementing-todo-phases-1,-2,-and-3.md` | L3959-4018 |
| `.specstory/history/2025-03-04_04-43-incorporating-ideas-from-ideas-md-into-todo-md.md` | L504-565 |
| `src/twat_fs/upload.py` | L95-135 |
| `src/twat_fs/upload_providers/utils.py` | L175-202 |
| `src/twat_fs/upload.py` | L54-95 |
| `tests/test_async_utils.py` | L167-198 |
| `tests/test_upload.py` | L426-470 |
| `tests/test_utils.py` | L280-322 |
| `tests/test_upload.py` | L1-37 |
| `src/twat_fs/upload_providers/bashupload.py` | L87-138 |
| `src/twat_fs/upload_providers/factory.py` | L116-167 |
| `twat_search.txt` | L1370-1410 |
| `templates/simple_provider_template.py` | L111-165 |
| `tests/test_upload.py` | L143-184 |

</details>

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Let's look at the exception handling issues and the cleanup.py linter issues:

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<details>
            <summary>Searched codebase "B904 linter errors raise ... from err" • **25** results</summary>
        
| File | Lines |
|------|-------|
| `.specstory/history/2025-03-04_05-33-implementing-todo-phases-1,-2,-and-3.md` | L3383-3489 |
| `.specstory/history/2025-03-04_05-33-implementing-todo-phases-1,-2,-and-3.md` | L2316-2422 |
| `src/twat_fs/upload_providers/core.py` | L276-285 |
| `src/twat_fs/upload_providers/dropbox.py` | L666-707 |
| `CLEANUP.txt` | L755-789 |
| `twat_search.txt` | L664-700 |
| `.specstory/history/2025-03-04_04-43-incorporating-ideas-from-ideas-md-into-todo-md.md` | L4191-4241 |
| `.specstory/history/2025-03-04_04-43-incorporating-ideas-from-ideas-md-into-todo-md.md` | L4893-4955 |
| `.specstory/history/2025-03-04_04-43-incorporating-ideas-from-ideas-md-into-todo-md.md` | L2235-2301 |
| `src/twat_fs/upload_providers/dropbox.py` | L430-434 |
| `src/twat_fs/upload_providers/litterbox.py` | L191-221 |
| `src/twat_fs/upload.py` | L399-408 |
| `.specstory/history/2025-03-04_04-43-incorporating-ideas-from-ideas-md-into-todo-md.md` | L4745-4822 |
| `cleanup.py` | L107-122 |
| `twat_search.txt` | L888-928 |
| `.specstory/history/2025-03-04_04-43-incorporating-ideas-from-ideas-md-into-todo-md.md` | L4822-4893 |
| `src/twat_fs/upload_providers/dropbox.py` | L426-430 |
| `CLEANUP.txt` | L789-844 |
| `.specstory/history/2025-03-04_04-43-incorporating-ideas-from-ideas-md-into-todo-md.md` | L4679-4745 |
| `src/twat_fs/upload_providers/dropbox.py` | L434-442 |
| `src/twat_fs/upload_providers/dropbox.py` | L513-550 |
| `.specstory/history/2025-03-04_04-43-incorporating-ideas-from-ideas-md-into-todo-md.md` | L4149-4191 |
| `tests/test_async_utils.py` | L198-228 |
| `src/twat_fs/upload_providers/dropbox.py` | L442-446 |
| `src/twat_fs/upload_providers/core.py` | L289-293 |

</details>

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Let's look at the cleanup.py file to understand the linter issues:

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Read file: cleanup.py

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Read file: cleanup.py

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Let's look at the failing tests in more detail:

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Read file: tests/test_async_utils.py

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Read file: src/twat_fs/upload_providers/async_utils.py

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Read file: src/twat_fs/upload_providers/async_utils.py

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Read file: src/twat_fs/upload_providers/utils.py

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Read file: src/twat_fs/upload_providers/utils.py

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Now that I have a better understanding of the codebase, let's start implementing the fixes for Phase 1, 2, and 3. I'll address them one by one.

### Phase 1: Fix Type Annotation Issues

Let's start by fixing the TypeVar issues in core.py:

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```diff
  
  # Type variables for generic decorators
- T = TypeVar("T", covariant=True)
- R = TypeVar("R", str, UploadResult, covariant=True)
+ T_co = TypeVar("T_co", covariant=True)
+ R_co = TypeVar("R_co", str, UploadResult, covariant=True)
  P = ParamSpec("P")
  
  
  
- class UploadCallable(Protocol[P, T]):
+ class UploadCallable(Protocol[P, T_co]):
      """Protocol for upload functions."""
  
-     def __call__(self, *args: P.args, **kwargs: P.kwargs) -> T: ...
+     def __call__(self, *args: P.args, **kwargs: P.kwargs) -> T_co: ...
  
  
- class AsyncUploadCallable(Protocol[P, T]):
+ class AsyncUploadCallable(Protocol[P, T_co]):
      """Protocol for async upload functions."""
  
-     async def __call__(self, *args: P.args, **kwargs: P.kwargs) -> T: ...
+     async def __call__(self, *args: P.args, **kwargs: P.kwargs) -> T_co: ...
  
  
      strategy: RetryStrategy = RetryStrategy.EXPONENTIAL,
      exceptions: tuple[type[Exception], ...] = (Exception,),
- ) -> Callable[[UploadCallable[P, T]], UploadCallable[P, T]]:
+ ) -> Callable[[UploadCallable[P, T_co]], UploadCallable[P, T_co]]:
      """
      Decorator for retrying upload operations with configurable backoff.
      """
  
-     def decorator(func: UploadCallable[P, T]) -> UploadCallable[P, T]:
+     def decorator(func: UploadCallable[P, T_co]) -> UploadCallable[P, T_co]:
          @functools.wraps(func)
-         def wrapper(*args: P.args, **kwargs: P.kwargs) -> T:
+         def wrapper(*args: P.args, **kwargs: P.kwargs) -> T_co:
              last_exception = None
              delay = initial_delay
      strategy: RetryStrategy = RetryStrategy.EXPONENTIAL,
      exceptions: tuple[type[Exception], ...] = (Exception,),
- ) -> Callable[[AsyncUploadCallable[P, T]], AsyncUploadCallable[P, T]]:
+ ) -> Callable[[AsyncUploadCallable[P, T_co]], AsyncUploadCallable[P, T_co]]:
      """
      Decorator for retrying async upload operations with configurable backoff.
      """
  
-     def decorator(func: AsyncUploadCallable[P, T]) -> AsyncUploadCallable[P, T]:
+     def decorator(func: AsyncUploadCallable[P, T_co]) -> AsyncUploadCallable[P, T_co]:
          @functools.wraps(func)
-         async def wrapper(*args: P.args, **kwargs: P.kwargs) -> T:
+         async def wrapper(*args: P.args, **kwargs: P.kwargs) -> T_co:
              last_exception = None
              delay = initial_delay
  
  
- def validate_file(func: UploadCallable[P, T]) -> UploadCallable[P, T]:
+ def validate_file(func: UploadCallable[P, T_co]) -> UploadCallable[P, T_co]:
      """
      Decorator to validate file existence and permissions before upload.
      """
  
      @functools.wraps(func)
-     def wrapper(*args: P.args, **kwargs: P.kwargs) -> T:
+     def wrapper(*args: P.args, **kwargs: P.kwargs) -> T_co:
          # Extract file path from args or kwargs
          file_path = next(
  
  
- def sync_to_async(func: UploadCallable[P, T]) -> AsyncUploadCallable[P, T]:
+ def sync_to_async(func: UploadCallable[P, T_co]) -> AsyncUploadCallable[P, T_co]:
      """
      Convert a synchronous upload function to an async one.
      """
  
      @functools.wraps(func)
-     async def wrapper(*args: P.args, **kwargs: P.kwargs) -> T:
+     async def wrapper(*args: P.args, **kwargs: P.kwargs) -> T_co:
          return await asyncio.to_thread(func, *args, **kwargs)
  
      return wrapper
  
  
- def async_to_sync(func: AsyncUploadCallable[P, T]) -> UploadCallable[P, T]:
+ def async_to_sync(func: AsyncUploadCallable[P, T_co]) -> UploadCallable[P, T_co]:
      """
      Convert an async upload function to a synchronous one.
      """
  
      @functools.wraps(func)
-     def wrapper(*args: P.args, **kwargs: P.kwargs) -> T:
+     def wrapper(*args: P.args, **kwargs: P.kwargs) -> T_co:
          return asyncio.run(func(*args, **kwargs))
  
  
  
- def with_timing(func: Callable[P, Awaitable[T]]) -> Callable[P, Awaitable[T]]:
+ def with_timing(func: Callable[P, Awaitable[T_co]]) -> Callable[P, Awaitable[T_co]]:
      """
      Decorator to add timing metrics to upload results.
  
      @functools.wraps(func)
-     async def wrapper(*args: P.args, **kwargs: P.kwargs) -> T:
+     async def wrapper(*args: P.args, **kwargs: P.kwargs) -> T_co:
          start_time = time.time()
          result = await func(*args, **kwargs)
```

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Now let's fix the failing tests. Let's start with the TestCreateProviderInstance tests:

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```diff
          """Test that create_provider_instance uses get_provider if available."""
          mock_provider = mock.Mock(spec=Provider)
+         mock_provider.__name__ = "MockProvider"
          mock_client = mock.Mock(spec=ProviderClient)
          mock_provider.get_provider.return_value = mock_client
          """Test that create_provider_instance falls back to direct instantiation."""
          mock_provider = mock.Mock(spec=Provider)
+         mock_provider.__name__ = "MockProvider"
          mock_provider.get_provider.side_effect = AttributeError
  
          """Test that create_provider_instance uses provided credentials."""
          mock_provider = mock.Mock(spec=Provider)
+         mock_provider.__name__ = "MockProvider"
          credentials = {"key": "value"}
  
          """Test that create_provider_instance gets credentials if not provided."""
          mock_provider = mock.Mock(spec=Provider)
+         mock_provider.__name__ = "MockProvider"
          mock_provider.get_credentials.return_value = {"key": "value"}
  
          """Test that create_provider_instance returns None if initialization fails."""
          mock_provider = mock.Mock(spec=Provider)
+         mock_provider.__name__ = "MockProvider"
          mock_provider.get_provider.side_effect = Exception("Test error")
  
```

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Now let's fix the TestLogUploadAttempt.test_log_upload_attempt_success test:

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```diff
      """
      if success:
-         logger.debug(f"Successfully uploaded {file_path} using {provider_name}")
+         logger.info(f"Successfully uploaded {file_path} using {provider_name}")
      else:
          logger.error(f"Failed to upload {file_path} using {provider_name}: {error}")
```

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Now let's fix the TestGatherWithConcurrency.test_gather_with_concurrency_with_exceptions test:

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```diff
  async def gather_with_concurrency(
      limit: int,
-     *tasks: Coroutine[Any, Any, T],
+     *tasks: Coroutine[Any, Any, T_co],
      return_exceptions: bool = False,
- ) -> list[T]:
+ ) -> list[T_co]:
      """
      Run coroutines with a concurrency limit.
      semaphore = asyncio.Semaphore(limit)
  
-     async def with_semaphore(task: Coroutine[Any, Any, T]) -> T:
+     async def with_semaphore(task: Coroutine[Any, Any, T_co]) -> T_co:
          async with semaphore:
-             return await task
+             try:
+                 return await task
+             except Exception as e:
+                 if return_exceptions:
+                     return e
+                 raise
  
      return await asyncio.gather(
```

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Let's fix the T_co undefined error in async_utils.py:

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```diff
  
  """
- Utility functions for handling async/sync conversions in upload providers.
- Standardizes patterns for working with async code across providers.
+ Core async utilities for upload providers.
+ Provides common functionality for async operations, timeouts, and concurrency control.
  """
  
  import asyncio
  import functools
- from typing import Any, TypeVar, ParamSpec, overload
- from collections.abc import Callable
- from collections.abc import Coroutine
+ import time
+ from typing import (
+     Any,
+     Callable,
+     TypeVar,
+     ParamSpec,
+     overload,
+     cast,
+ )
+ from collections.abc import Coroutine, Awaitable
  
  from loguru import logger
  
  # Type variables for generic functions
  T = TypeVar("T")
+ T_co = TypeVar("T_co", covariant=True)
  P = ParamSpec("P")
  
```

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Now let's fix the exception handling issues in Phase 3. Let's start with the upload.py file:

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```diff
          if not remaining:
              msg = "All providers failed"
-             raise RuntimeError(msg)
+             raise RuntimeError(msg) from None
  
          # Try next provider with fallback
```

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Let's fix the B904 linter errors in the fal.py file:

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Read file: src/twat_fs/upload_providers/fal.py

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```diff
              if "401" in str(e) or "unauthorized" in str(e).lower():
                  msg = "FAL API key is invalid or expired. Please generate a new key."
-                 raise NonRetryableError(msg, self.provider_name)
+                 raise NonRetryableError(msg, self.provider_name) from e
              msg = f"FAL API check failed: {e}"
-             raise RetryableError(msg, self.provider_name)
+             raise RetryableError(msg, self.provider_name) from e
  
          try:
              if not result:
                  msg = "FAL upload failed - no URL in response"
-                 raise RetryableError(msg, self.provider_name)
+                 raise RetryableError(msg, self.provider_name) from None
  
              result_str = str(result).strip()
              if not result_str:
                  msg = "FAL upload failed - empty URL in response"
-                 raise RetryableError(msg, self.provider_name)
+                 raise RetryableError(msg, self.provider_name) from None
  
              return result_str
              if "401" in str(e) or "unauthorized" in str(e).lower():
                  msg = f"FAL upload failed - unauthorized: {e}"
-                 raise NonRetryableError(msg, self.provider_name)
+                 raise NonRetryableError(msg, self.provider_name) from e
              msg = f"FAL upload failed: {e}"
-             raise RetryableError(msg, self.provider_name)
+             raise RetryableError(msg, self.provider_name) from e
  
      def upload_file_impl(self, file: BinaryIO) -> UploadResult:
```

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Let's fix the B904 linter errors in the filebin.py file:

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Read file: src/twat_fs/upload_providers/filebin.py

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```diff
                      continue
                  msg = f"Request failed: {e}"
-                 raise NonRetryableError(msg, self.provider_name)
+                 raise NonRetryableError(msg, self.provider_name) from e
  
          # This should never be reached due to the exception handling above
          msg = "Upload failed after retries"
-         raise NonRetryableError(msg, self.provider_name)
+         raise NonRetryableError(msg, self.provider_name) from None
  
      def upload_file_impl(self, file: BinaryIO) -> UploadResult:
```

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Let's fix the B904 linter errors in the s3.py file:

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Read file: src/twat_fs/upload_providers/s3.py

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Read file: src/twat_fs/upload_providers/s3.py

---

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```diff
          except Exception as e:
              msg = f"Failed to create S3 client: {e}"
-             raise NonRetryableError(msg, self.provider_name)
+             raise NonRetryableError(msg, self.provider_name) from e
  
      def _get_s3_url(self, key: str) -> str:
              if "ConnectionError" in error_str or "Timeout" in error_str:
                  msg = f"Temporary connection issue: {e}"
-                 raise RetryableError(msg, self.provider_name)
+                 raise RetryableError(msg, self.provider_name) from e
              else:
                  msg = f"Upload failed: {e}"
-                 raise NonRetryableError(msg, self.provider_name)
+                 raise NonRetryableError(msg, self.provider_name) from e
  
      def upload_file_impl(
```

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Now let's fix the ClassVar annotations for mutable class attributes:

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Read file: src/twat_fs/upload_providers/litterbox.py

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Read file: src/twat_fs/upload_providers/s3.py

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```diff
      # Class variables
      PROVIDER_HELP: ClassVar[ProviderHelp] = PROVIDER_HELP
-     provider_name = "litterbox"
+     provider_name: ClassVar[str] = "litterbox"
  
      # Environment variables
-     OPTIONAL_ENV_VARS: list[str] = ["LITTERBOX_DEFAULT_EXPIRATION"]
+     OPTIONAL_ENV_VARS: ClassVar[list[str]] = ["LITTERBOX_DEFAULT_EXPIRATION"]
  
      def __init__(
```

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---

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```diff
  
      PROVIDER_HELP: ClassVar[ProviderHelp] = PROVIDER_HELP
-     provider_name: str = "s3"
+     provider_name: ClassVar[str] = "s3"
  
      # Required environment variables
-     REQUIRED_ENV_VARS = [
+     REQUIRED_ENV_VARS: ClassVar[list[str]] = [
          "AWS_S3_BUCKET",
      ]
  
      # Optional environment variables
-     OPTIONAL_ENV_VARS = [
+     OPTIONAL_ENV_VARS: ClassVar[list[str]] = [
          "AWS_DEFAULT_REGION",
          "AWS_ENDPOINT_URL",
```

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Now let's fix the cleanup.py linter issues:

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```diff
  import os
  import sys
- from datetime import datetime
+ from datetime import datetime, timezone
  from pathlib import Path
  from typing import NoReturn
  def log_message(message: str) -> None:
      """Log a message to file and console with timestamp."""
-     timestamp = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
+     timestamp = datetime.now(timezone.utc).strftime("%Y-%m-%d %H:%M:%S")
      log_line = f"{timestamp} - {message}\n"
      with LOG_FILE.open("a") as f:
```

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