marshmallow-code/marshmallow

28.5

Adjusted Score

28.5

Raw Score

100%

Time Factor

2026-08-01

Last Push

7.2K

Stars

Python

Language

16.2K

Lines of Code

Files

542

Pattern Hits

2026-08-02

Scan Date

0.00

HC Hit Rate

What These Metrics Mean

Adjusted Score: Primary synthetic code indicator. Raw score normalised per 1,000 lines of code and multiplied by the temporal discount factor. This is the definitive comparative metric — use it to rank repositories by AI authorship density.
Raw Score: The unmodified sum of all severity-weighted, context-multiplied pattern match scores before temporal discounting. Reflects the absolute signal strength independent of when the repository was last active.
Time Factor: The temporal discount multiplier (0–100%) applied to the raw score. Repositories last updated before ChatGPT's launch (Nov 2022) receive a 5% factor. Full signal is only assigned to repositories active in the post-adoption era (Jan 2024+).
Pattern Hits: Total count of individual pattern matches across all files and categories. A high hit count with a low score may indicate a very large codebase with isolated AI snippets; a low count with a high score indicates dense, concentrated AI signatures.
HC Hit Rate: High+Critical pattern hits per file, averaged across the repository. This orthogonal signal catches repositories where a few files are densely packed with high-severity AI tells — a strong indicator even when the normalised score appears moderate due to codebase size.
Lines of Code / Files: Total lines and files analysed. The scanner examines 94 file extensions. These denominators are used to normalise the score, enabling fair comparison between repositories of vastly different sizes.

Score History

Longitudinal tracking requires multiple scan runs. Once this repository is re-scanned after new commits land, this chart will visualise how the synthetic code signal evolves over time — enabling you to detect whether AI authorship is growing, stabilising, or being actively corrected by human engineers.

No multi-scan history yet — run the scanner again to build trend data.

Severity Breakdown

Classifies detected patterns by their diagnostic confidence and structural impact. CRITICAL patterns (coefficient 10) represent definitive synthetic signatures — hallucinated imports, explicit LLM attribution metadata — virtually never produced by human authors. HIGH (5) indicates strong structural tells such as cross-file repetition or cross-linguistic idioms. MEDIUM (2) covers recognisable conversational padding and AI-specific vocabulary. LOW (1) captures subtle indicators like tautological comments and generic boilerplate that require density to carry independent signal.

CRITICAL 0HIGH 0MEDIUM 2LOW 540

Directory Score Breakdown

This horizontal bar chart decomposes the repository's raw synthetic code score by top-level directory, allowing you to pinpoint precisely which modules or components carry the highest AI authorship density. Directories with disproportionately high scores relative to their size warrant targeted manual review: concentrated AI signatures often trace back to mass-generated configuration layers, auto-ported test suites, LLM-scaffolded boilerplate classes, or entire subsystems authored under heavy copilot assistance. Use this view to prioritise your human code-review effort.

Pattern Findings

The scanner identified 542 distinct pattern matches across 9 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a statistically significant AI authorship indicator. Expand any category row to inspect the individual file paths, line numbers, code snippets, and the lexical context (CODE, COMMENT, or STRING) in which each match was detected.

Reading the findings table: The Severity column indicates the diagnostic confidence level (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — comment-context matches receive a ×1.5 weight because LLMs systematically over-annotate. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier as dense clusters constitute far stronger evidence of synthetic authorship than isolated hits.

Hyper-Verbose Identifiers487 hits · 403 pts

Severity	File	Line	Snippet	Context
LOW⚡	tests/test_deserialization.py	51	def test_fields_allow_none_deserialize_to_none(self, FieldClass):	CODE
LOW⚡	tests/test_deserialization.py	57	def test_fields_dont_allow_none_by_default(self, FieldClass):	CODE
LOW⚡	tests/test_deserialization.py	62	def test_allow_none_is_true_if_missing_is_true(self):	CODE
LOW⚡	tests/test_deserialization.py	67	def test_list_field_deserialize_none_to_none(self):	CODE
LOW⚡	tests/test_deserialization.py	71	def test_tuple_field_deserialize_none_to_none(self):	CODE
LOW⚡	tests/test_deserialization.py	75	def test_list_of_nested_allow_none_deserialize_none_to_none(self):	CODE
LOW⚡	tests/test_deserialization.py	79	def test_list_of_nested_non_allow_none_deserialize_none_to_validation_error(self):	CODE
LOW⚡	tests/test_deserialization.py	86	def test_float_field_deserialization(self):	CODE
LOW⚡	tests/test_deserialization.py	92	def test_invalid_float_field_deserialization(self, in_val):	CODE
LOW⚡	tests/test_deserialization.py	98	def test_float_field_overflow(self):	CODE
LOW⚡	tests/test_deserialization.py	104	def test_integer_field_deserialization(self):	CODE
LOW⚡	tests/test_deserialization.py	401	def test_boolean_field_deserialization_with_empty_truthy(self):	CODE
LOW⚡	tests/test_deserialization.py	407	def test_boolean_field_deserialization_with_custom_falsy_values(self):	CODE
LOW⚡	tests/test_deserialization.py	412	def test_field_toggle_show_invalid_value_in_error_message(self):	CODE
LOW⚡	tests/test_deserialization.py	595	def test_boolean_timestamp_field_deserialization(self, fmt, in_value):	CODE
LOW⚡	tests/test_deserialization.py	605	def test_invalid_timestamp_field_deserialization(self, fmt, in_value):	CODE
LOW⚡	tests/test_deserialization.py	615	def test_oversized_timestamp_field_deserialization(self, fmt, mock_fromtimestamp):	CODE
LOW⚡	tests/test_deserialization.py	657	def test_naive_datetime_with_timezone(self, fmt, timezone, value, expected):	CODE
LOW⚡	tests/test_deserialization.py	666	def test_aware_datetime_default_timezone(self, fmt, timezone, value):	CODE
LOW⚡	tests/test_deserialization.py	672	def test_time_field_deserialization(self):	CODE
LOW⚡	tests/test_deserialization.py	717	def test_iso_time_field_deserialization(self, fmt, value, expected):	CODE
LOW⚡	tests/test_deserialization.py	724	def test_invalid_timedelta_precision(self):	CODE
LOW⚡	tests/test_deserialization.py	728	def test_timedelta_field_deserialization(self):	CODE
LOW⚡	tests/test_deserialization.py	973	def test_url_field_non_list_validators(self):	CODE
LOW⚡	tests/test_deserialization.py	978	def test_relative_url_field_deserialization(self):	CODE
LOW⚡	tests/test_deserialization.py	982	def test_url_field_schemes_argument(self):	CODE
LOW⚡	tests/test_deserialization.py	990	def test_email_field_deserialization(self):	CODE
LOW⚡	tests/test_deserialization.py	1003	def test_email_field_non_list_validators(self):	CODE
LOW⚡	tests/test_deserialization.py	1008	def test_function_field_deserialization_is_noop_by_default(self):	CODE
LOW⚡	tests/test_deserialization.py	1014	def test_function_field_deserialization_with_callable(self):	CODE
LOW⚡	tests/test_deserialization.py	1018	def test_function_field_deserialization_missing_with_length_validator(self):	CODE
LOW⚡	tests/test_deserialization.py	1025	def test_function_field_passed_deserialize_only_is_load_only(self):	CODE
LOW⚡	tests/test_deserialization.py	1029	def test_function_field_passed_deserialize_and_serialize_is_not_load_only(self):	CODE
LOW⚡	tests/test_deserialization.py	1035	def test_uuid_field_deserialization(self):	CODE
LOW⚡	tests/test_deserialization.py	1198	def test_enum_field_by_symbol_deserialization(self):	CODE
LOW⚡	tests/test_deserialization.py	1202	def test_enum_field_by_symbol_invalid_value(self):	CODE
LOW⚡	tests/test_deserialization.py	1210	def test_enum_field_by_symbol_rejects_non_member_attributes(self, non_member):	CODE
LOW⚡	tests/test_deserialization.py	1217	def test_enum_field_by_symbol_not_string(self):	CODE
LOW⚡	tests/test_deserialization.py	1222	def test_enum_field_by_value_true_deserialization(self):	CODE
LOW⚡	tests/test_deserialization.py	1228	def test_enum_field_by_value_field_deserialization(self):	CODE
LOW⚡	tests/test_deserialization.py	1236	def test_enum_field_by_value_true_invalid_value(self):	CODE
LOW⚡	tests/test_deserialization.py	1285	def test_enum_by_value_allow_none_default(self):	CODE
LOW⚡	tests/test_deserialization.py	1289	def test_deserialization_function_must_be_callable(self):	CODE
LOW⚡	tests/test_deserialization.py	1293	def test_method_field_deserialization_is_noop_by_default(self):	CODE
LOW⚡	tests/test_deserialization.py	1303	def test_deserialization_method(self):	CODE
LOW⚡	tests/test_deserialization.py	1316	def test_deserialization_method_must_be_a_method(self):	CODE
LOW⚡	tests/test_deserialization.py	1323	def test_method_field_deserialize_only(self):	CODE
LOW⚡	tests/test_deserialization.py	1332	def test_datetime_list_field_deserialization(self):	CODE
LOW⚡	tests/test_deserialization.py	1341	def test_list_field_deserialize_invalid_item(self):	CODE
LOW⚡	tests/test_deserialization.py	1413	def test_tuple_field_deserialize_value_that_is_not_a_collection(self, value):	CODE
LOW⚡	tests/test_deserialization.py	1419	def test_tuple_field_deserialize_invalid_length(self):	CODE
LOW⚡	tests/test_deserialization.py	1425	def test_constant_field_deserialization(self):	CODE
LOW⚡	tests/test_deserialization.py	1429	def test_constant_is_always_included_in_deserialized_data(self):	CODE
LOW⚡	tests/test_deserialization.py	1437	def test_constant_none_allows_none_value(self):	CODE
LOW⚡	tests/test_deserialization.py	1446	def test_constant_with_required(self):	CODE
LOW⚡	tests/test_deserialization.py	1454	def test_field_deserialization_with_user_validator_function(self):	CODE
LOW⚡	tests/test_deserialization.py	1462	def test_field_deserialization_with_user_validator_that_raises_error_with_list(	CODE
LOW⚡	tests/test_deserialization.py	1701	def test_nested_none_deserialization(self):	CODE
LOW⚡	tests/test_deserialization.py	1711	def test_deserialize_with_attribute_param(self):	CODE
LOW⚡	tests/test_deserialization.py	1722	def test_deserialize_with_attribute_param_symmetry(self):	CODE
427 more matches not shown…

Unused Imports29 hits · 29 pts

Severity	File	Line	Context
LOW	tests/test_registry.py	192	CODE
LOW	tests/test_registry.py	207	CODE
LOW	tests/test_registry.py	214	CODE
LOW	tests/test_utils.py	1	CODE
LOW	tests/mypy_test_cases/test_validation_error.py	1	CODE
LOW	examples/flask_example.py	10	CODE
LOW	src/marshmallow/fields.py	2	CODE
LOW	src/marshmallow/__init__.py	1	CODE
LOW	src/marshmallow/__init__.py	1	CODE
LOW	src/marshmallow/__init__.py	1	CODE
LOW	src/marshmallow/__init__.py	1	CODE
LOW	src/marshmallow/__init__.py	2	CODE
LOW	src/marshmallow/__init__.py	2	CODE
LOW	src/marshmallow/__init__.py	2	CODE
LOW	src/marshmallow/__init__.py	2	CODE
LOW	src/marshmallow/__init__.py	2	CODE
LOW	src/marshmallow/__init__.py	2	CODE
LOW	src/marshmallow/__init__.py	10	CODE
LOW	src/marshmallow/__init__.py	11	CODE
LOW	src/marshmallow/__init__.py	11	CODE
LOW	src/marshmallow/__init__.py	13	CODE
LOW	src/marshmallow/types.py	8	CODE
LOW	src/marshmallow/validate.py	3	CODE
LOW	src/marshmallow/class_registry.py	12	CODE
LOW	src/marshmallow/utils.py	3	CODE
LOW	src/marshmallow/exceptions.py	3	CODE
LOW	src/marshmallow/schema.py	4	CODE
LOW	src/marshmallow/decorators.py	68	CODE
LOW	src/marshmallow/experimental/context.py	31	CODE

Fake / Example Data11 hits · 10 pts

Severity	File	Line	Snippet	Context
LOW⚡	tests/test_deserialization.py	992	assert field.deserialize("foo@bar.com") == "foo@bar.com"	CODE
LOW⚡	tests/test_deserialization.py	999	field.deserialize("foo@bar.com")	CODE
LOW⚡	tests/test_deserialization.py	1716	data = {"username": "foo@bar.com", "years": "42"}	CODE
LOW⚡	tests/test_deserialization.py	1718	assert result["email"] == "foo@bar.com"	CODE
LOW⚡	tests/test_deserialization.py	1767	data = {"Name": "Mick", "UserName": "foo@bar.com", "years": "42"}	CODE
LOW⚡	tests/test_deserialization.py	1770	assert result["email"] == "foo@bar.com"	CODE
LOW⚡	tests/test_deserialization.py	1855	{"email": "foo@bar.com", "colors": "red", "age": 18},	CODE
LOW⚡	tests/test_schema.py	574	"email": "foo@bar.com",	CODE
LOW	tests/test_validate.py	333	"!#$%&'*+-/=?^_`{}\|~@example.org",	CODE
LOW	tests/test_validate.py	356	'" "@example.org',	CODE
LOW⚡	tests/test_serialization.py	42	return User("Foo", email="foo@bar.com", age=42)	CODE

Deep Nesting7 hits · 6 pts

Severity	File	Line	Context
LOW	tests/test_fields.py	313	CODE
LOW	src/marshmallow/fields.py	567	CODE
LOW	src/marshmallow/fields.py	1686	CODE
LOW	src/marshmallow/error_store.py	37	CODE
LOW	src/marshmallow/schema.py	597	CODE
LOW	src/marshmallow/schema.py	773	CODE
LOW	src/marshmallow/schema.py	1124	CODE

Decorative Section Separators1 hit · 3 pts

Severity	File	Line	Snippet	Context
MEDIUM	examples/inflection_example.py	24	# -----------------------------------------------------------------------------	COMMENT

Self-Referential Comments1 hit · 3 pts

Severity	File	Line	Snippet	Context
MEDIUM	examples/flask_example.py	144	# Create a new author	COMMENT

AI Structural Patterns2 hits · 2 pts

Severity	File	Line	Snippet	Context
LOW	tests/base.py	104		CODE
LOW	src/marshmallow/fields.py	192		CODE

Modern Structural Boilerplate2 hits · 2 pts

Severity	File	Line	Snippet	Context
LOW	src/marshmallow/fields.py	44	__all__ = [	CODE
LOW	src/marshmallow/__init__.py	15	__all__ = [	CODE

Over-Commented Block2 hits · 2 pts

Severity	File	Line	Snippet	Context
LOW	src/marshmallow/orderedset.py	1	# OrderedSet	COMMENT
LOW	src/marshmallow/class_registry.py	41	register("MyClass", MyClass)	COMMENT

Analysis Overview

What These Metrics Mean

Score History

Severity Breakdown

Directory Score Breakdown

Pattern Findings