--- /dev/null
+#include "git2/sys/filter.h"
+
+extern git_filter *create_bitflip_filter(void);
+extern git_filter *create_reverse_filter(const char *attr);
+extern git_filter *create_erroneous_filter(const char *attr);
+
+extern int bitflip_filter_apply(
+ git_filter *self,
+ void **payload,
+ git_str *to,
+ const git_str *from,
+ const git_filter_source *source);
+
+extern int reverse_filter_apply(
+ git_filter *self,
+ void **payload,
+ git_str *to,
+ const git_str *from,
+ const git_filter_source *source);