Please address the comments from this code review:

## Individual Comments

### Comment 1
<location path="tests/test_httpx_socks_dependency.py" line_range="25-28" />
<code_context>
+    return entries
+
+
+def _read_pyproject_dependencies() -> list[str]:
+    with PYPROJECT_PATH.open("rb") as file:
+        pyproject = tomllib.load(file)
+    return pyproject["project"]["dependencies"]
+
+
</code_context>
<issue_to_address>
**issue (testing):** The test only checks presence in `project.dependencies`, not alignment between `requirements.txt` and `pyproject.toml` (e.g. version specifiers).

Right now the tests only assert that each file independently contains `httpx[socks]`. A change like `httpx[socks]==1.0.0` in one file and `httpx[socks]>=1.0.0` in the other would still pass. Please add a test that compares the `httpx[socks]` spec from both files and asserts they are identical (or otherwise compatible under the alignment rule you intend to enforce).
</issue_to_address>

### Comment 2
<location path="tests/test_httpx_socks_dependency.py" line_range="9-18" />
<code_context>
+HTTPX_SOCKS_PATTERN = re.compile(r"^httpx\[socks\](?:\s*[<>=!~].*)?$")
</code_context>
<issue_to_address>
**suggestion (testing):** Add explicit assertion messages so failures clearly explain that SOCKS proxy support is misconfigured.

For example, instead of bare `assert` statements, use something like:

```python
assert _contains_httpx_socks_dependency(...), (
    "Expected httpx[socks] dependency for SOCKS proxy support"
)
```

This makes it clear that a missing or renamed dependency is what broke the test, which helps future contributors quickly understand and fix failures.

Suggested implementation:

```python
    assert _contains_httpx_socks_dependency(
        requirements
    ), "Expected httpx[socks] dependency in requirements.txt for SOCKS proxy support"

```

```python
    assert _contains_httpx_socks_dependency(
        pyproject_requirements
    ), "Expected httpx[socks] dependency in pyproject.toml for SOCKS proxy support"

```

I only see the top of the file, so I assumed test code of the form:

- `assert _contains_httpx_socks_dependency(requirements)`
- `assert _contains_httpx_socks_dependency(pyproject_requirements)`

Please update every bare `assert _contains_httpx_socks_dependency(...)` in this test module to include an explicit message that mentions:
1. That `httpx[socks]` is expected, and
2. Which source (e.g. `requirements.txt` or `pyproject.toml`) is being checked.

If there are differently named variables or additional tests, mirror the pattern above, tailoring the message to the specific dependency source being asserted.
</issue_to_address>

Please address the comments from this code review:

## Individual Comments

### Comment 1
<location path="tests/test_httpx_socks_dependency.py" line_range="9" />
<code_context>
+PROJECT_ROOT = Path(__file__).resolve().parents[1]
+REQUIREMENTS_PATH = PROJECT_ROOT / "requirements.txt"
+PYPROJECT_PATH = PROJECT_ROOT / "pyproject.toml"
+HTTPX_SOCKS_PATTERN = re.compile(r"^httpx\[socks\](?:\s*[<>=!~].*)?$")
+
+
</code_context>
<issue_to_address>
**suggestion:** Regex is too strict to allow future use of environment markers in dependency specs.

The current `HTTPX_SOCKS_PATTERN` only matches optional version specifiers and then end-of-line, so something like `httpx[socks]; python_version >= "3.11"` would be treated as invalid even though it’s a valid dependency form. Relax the pattern to allow a `;` and trailing environment markers (e.g. `r"^httpx\[socks\](?:\s*[<>=!~].*)?(?:\s*;.*)?$"`) and add/adjust a test to ensure such forms are accepted.

Suggested implementation:

```python
HTTPX_SOCKS_PATTERN = re.compile(
    r"^httpx\[socks\](?:\s*[<>=!~].*)?(?:\s*;.*)?$"
)

```

```python
def test_httpx_socks_pattern_allows_environment_markers():
    entry = 'httpx[socks]; python_version >= "3.11"'
    assert HTTPX_SOCKS_PATTERN.match(entry)


def _read_httpx_socks_dependency(entries: list[str]) -> str | None:

```
</issue_to_address>

Please address the comments from this code review:

## Individual Comments

### Comment 1
<location path="tests/test_httpx_socks_dependency.py" line_range="9-12" />
<code_context>
+PROJECT_ROOT = Path(__file__).resolve().parents[1]
+REQUIREMENTS_PATH = PROJECT_ROOT / "requirements.txt"
+PYPROJECT_PATH = PROJECT_ROOT / "pyproject.toml"
+HTTPX_SOCKS_PATTERN = re.compile(r"^httpx\[socks\](?:\s*[<>=!~][^;]*)?(?:\s*;.*)?$")
+
+
</code_context>
<issue_to_address>
**suggestion (testing):** Add negative tests to ensure the pattern does not match non-SOCKS httpx dependencies or malformed entries.

Currently we only verify that `HTTPX_SOCKS_PATTERN` matches a valid `httpx[socks]` requirement. Please also add assertions that it does *not* match invalid cases such as `httpx`, `httpx[http2]`, `httpx[socks-extra]`, and entries with extra leading/trailing text, so future regex changes that are too broad are caught by tests.

```suggestion
HTTPX_SOCKS_PATTERN = re.compile(r"^httpx\[socks\](?:\s*[<>=!~][^;]*)?(?:\s*;.*)?$")


def test_httpx_socks_pattern_matches_valid_entries() -> None:
    valid_entries = [
        "httpx[socks]",
        "httpx[socks]==0.27.0",
        "httpx[socks]>=0.27.0,<0.28.0",
        'httpx[socks]>=0.27.0 ; python_version < "3.13"',
        'httpx[socks] ; python_version < "3.13"',
    ]

    for entry in valid_entries:
        match = HTTPX_SOCKS_PATTERN.match(entry)
        assert match is not None, f"Expected pattern to match valid entry: {entry}"
        assert match.group(0) == entry


def test_httpx_socks_pattern_does_not_match_invalid_entries() -> None:
    invalid_entries = [
        "httpx",
        "httpx==0.27.0",
        "httpx[http2]",
        "httpx[socks-extra]",
        "httpx [socks]",
        "someprefix httpx[socks]",
        "httpx[socks] trailing-text",
        "httpx[socks] extra ; markers",
        "httpx[socks]andmore",
    ]

    for entry in invalid_entries:
        assert HTTPX_SOCKS_PATTERN.match(entry) is None, (
            f"Expected pattern not to match invalid entry: {entry}"
        )


def _read_httpx_socks_dependency(entries: list[str]) -> str | None:
```
</issue_to_address>

### Comment 2
<location path="tests/test_httpx_socks_dependency.py" line_range="67-70" />
<code_context>
+    )
+
+
+def test_httpx_socks_pattern_allows_environment_markers() -> None:
+    entry = 'httpx[socks]; python_version >= "3.11"'
+
+    assert HTTPX_SOCKS_PATTERN.match(entry), (
+        "Expected httpx[socks] dependency pattern to allow environment markers "
+        "for SOCKS proxy support"
</code_context>
<issue_to_address>
**suggestion (testing):** Extend the pattern tests to cover version specifiers and minor formatting variations.

Consider parametrizing this test with additional valid patterns, such as:
- `httpx[socks]==0.28.1`
- `httpx[socks]>=0.27,<0.29`
- `httpx[socks]  >=0.27  ; python_version < "3.13"`
This would improve coverage for version specifiers and whitespace variations so future changes to `requirements.txt`/`pyproject.toml` remain compatible with the regex.

Suggested implementation:

```python
import pytest


@pytest.mark.parametrize(
    "entry",
    [
        'httpx[socks]; python_version >= "3.11"',
        "httpx[socks]==0.28.1",
        "httpx[socks]>=0.27,<0.29",
        'httpx[socks]  >=0.27  ; python_version < "3.13"',
    ],
)
def test_httpx_socks_pattern_matches_valid_variants(entry: str) -> None:
    assert HTTPX_SOCKS_PATTERN.match(entry), (
        "Expected httpx[socks] dependency pattern to allow environment markers, "
        "version specifiers, and whitespace variations for SOCKS proxy support"
    )

```

If `pytest` is already imported elsewhere in this file, remove the new `import pytest` line from the replacement block to avoid duplicate imports. Otherwise, keep it so that `@pytest.mark.parametrize` works correctly.
</issue_to_address>