Please address the comments from this code review:

## Overall Comments
- In the loop over directory entries, the local variable `path` shadows the outer parameter—consider renaming it (e.g. `entryPath`) to avoid confusion.
- The implementation only scans the immediate directory and skips nested directories—if you need to support deeper hierarchies, consider recursing into subfolders or using filepath.WalkDir for a more robust traversal.

## Individual Comments

### Comment 1
<location> `snaggle_test.go:99` </location>
<code_context>
 	}
 }
+
+func TestDirectory(t *testing.T) {
+	var stdout strings.Builder
+	log.SetOutput(&stdout)
</code_context>

<issue_to_address>
**suggestion (testing):** Missing test for error conditions when processing a directory.

Please add tests for cases like os.ReadDir failure, unreadable files, and snaggle errors to cover error handling in directory processing.

Suggested implementation:

```golang
func TestDirectory(t *testing.T) {
	var stdout strings.Builder
	log.SetOutput(&stdout)
	t.Cleanup(func() { log.SetOutput(os.Stdout) })

	Assert := assert.New(t)
	tmp := WorkspaceTempDir(t)

	contents := CommonBinaries(t)
	dir := TestdataPath(".")
	inplace := false

	var expectedOut []string

	// Test: os.ReadDir failure
	t.Run("ReadDirError", func(t *testing.T) {
		// Simulate ReadDir error by passing a non-existent directory
		_, err := os.ReadDir("/nonexistent-directory-should-fail")
		Assert.Error(err, "expected error when reading non-existent directory")
	})

	// Test: unreadable file in directory
	t.Run("UnreadableFile", func(t *testing.T) {
		unreadableFile := filepath.Join(tmp, "unreadable.txt")
		err := os.WriteFile(unreadableFile, []byte("data"), 0000)
		Assert.NoError(err)
		defer os.Remove(unreadableFile)

		f, err := os.Open(unreadableFile)
		if f != nil {
			f.Close()
		}
		Assert.Error(err, "expected error when opening unreadable file")
	})

	// Test: snaggle error simulation
	t.Run("SnaggleError", func(t *testing.T) {
		// Simulate a snaggle error by calling a function that returns an error
		err := errors.New("snaggle error")
		Assert.Error(err, "expected snaggle error")
	})
}

```

- If your directory processing logic is encapsulated in a function (e.g., `ProcessDirectory`), you should call that function in the error tests and mock its dependencies to trigger the errors.
- You may need to adjust the error simulation to match your actual error handling and logging mechanisms.
- Ensure that the error cases are covered in your main directory processing function, not just in the test scaffolding.
</issue_to_address>

### Comment 2
<location> `snaggle.go:158` </location>
<code_context>
 	binDir := filepath.Join(root, "bin")
 	libDir := filepath.Join(root, "lib64")

+	stat, err := os.Stat(path)
+	if err != nil {
+		return err
</code_context>

<issue_to_address>
**issue (complexity):** Consider replacing manual directory traversal and recursion with filepath.WalkDir to simplify file iteration and error handling.

Consider replacing the custom recursion in Snaggle + snaggle with Go’s filepath.WalkDir. This flattens the logic, kills the helper, and handles directories/files in one place:

```go
import (
    "debug/elf"
    "errors"
    "io/fs"
    "path/filepath"
    "golang.org/x/sync/errgroup"
)

// Snaggle walks src (file or dir), parses each ELF, skips non-ELF,
// and links executables into bin/ or libs into lib64/ under root.
func Snaggle(src, root string, opts ...option) error {
    // 1. apply options as before
    var options options
    for _, o := range opts {
        o(&options)
    }

    binDir := filepath.Join(root, "bin")
    libDir := filepath.Join(root, "lib64")
    g := new(errgroup.Group)

    // 2. walk everything under src
    err := filepath.WalkDir(src, func(path string, d fs.DirEntry, err error) error {
        if err != nil {
            return err
        }
        if d.IsDir() {
            return nil
        }

        // 3. open ELF, skip non-ELF
        f, err := elf.New(path)
        if err != nil {
            var fe *elf.FormatError
            if errors.As(err, &fe) {
                return nil
            }
            return err
        }

        // 4. no-op for inplace
        if options.inplace {
            return nil
        }

        // 5. enqueue link
        dst := libDir
        if f.IsExe() {
            dst = binDir
        }
        p := path // capture
        g.Go(func() error { return link(p, dst) })
        return nil
    })
    if err != nil {
        return err
    }

    // 6. wait for all links
    return g.Wait()
}
```

Steps:
- Remove `os.Stat`/`os.ReadDir` and the separate `snaggle` helper.
- Use `filepath.WalkDir` to iterate files.
- Inline ELF-open + skip-FormatError logic.
- Use one errgroup for parallel links.
</issue_to_address>