mruby/mruby

3.3

Adjusted Score

3.3

Raw Score

100%

Time Factor

2026-07-14

Last Push

5.6K

Stars

Language

174.6K

Lines of Code

630

Files

508

Pattern Hits

2026-07-14

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

This chart maps the temporal evolution of the adjusted synthetic code score across successive scan runs. An upward trajectory indicates ongoing incorporation of AI-generated code or expanding LLM-assisted scaffolding; a stable or declining trajectory may reflect active human refactoring, code removal, or the adoption of stricter authorship policies. The dashed secondary line (right axis) independently tracks total raw pattern hit count, which can diverge from the normalised score when codebase size changes significantly between scans.

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 28LOW 480

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 508 distinct pattern matches across 10 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.

Over-Commented Block440 hits · 430 pts

Severity	File	Line	Snippet	Context
LOW	build_config.rb	1	# The default build configuration file was moved to `build_config/default.rb`.	COMMENT
LOW	benchmark/vm_optimization_bench.rb	1	# VM Optimization Benchmarks for mruby	COMMENT
LOW	mrblib/compar.rb	1	##	COMMENT
LOW	mrblib/compar.rb	41	##	COMMENT
LOW	mrblib/compar.rb	61	# false.	COMMENT
LOW	mrblib/string.rb	81	# Replace all matches of `pattern` with `replacement`.	COMMENT
LOW	mrblib/string.rb	161	# those two methods requires Regexp that is optional in mruby	COMMENT
LOW	mrblib/enum.rb	1	##	COMMENT
LOW	mrblib/enum.rb	21	# if one block value is false. Otherwise	COMMENT
LOW	mrblib/enum.rb	161	# Return true if at least one element which	COMMENT
LOW	mrblib/enum.rb	321	# ISO 15.3.2.2.18	COMMENT
LOW	mrblib/array.rb	1	##	COMMENT
LOW	mrblib/array.rb	61	while idx < len	COMMENT
LOW	mrblib/array.rb	81	# array.sort {\|a, b\| ... } -> new_array	COMMENT
LOW	mrblib/numeric.rb	1	##	COMMENT
LOW	mrblib/hash.rb	1	##	COMMENT
LOW	mrblib/hash.rb	21	# was found. Return nil if nothing was	COMMENT
LOW	mrblib/hash.rb	41	# and pass the key and value of each element.	COMMENT
LOW	mrblib/hash.rb	61	while i < len	COMMENT
LOW	mrblib/hash.rb	81	# <em>produces:</em>	COMMENT
LOW	mrblib/hash.rb	101	# If no block is given, an enumerator is returned instead.	COMMENT
LOW	mrblib/hash.rb	121	# hsh.merge(other_hash..) -> hsh	COMMENT
LOW	mrblib/hash.rb	181	end	COMMENT
LOW	mrblib/hash.rb	261	end	COMMENT
LOW	mrblib/range.rb	1	##	COMMENT
LOW	mrblib/kernel.rb	1	##	COMMENT
LOW	test/assert.rb	241	unless ret = obj1.__send__(op, obj2) == affirmed	COMMENT
LOW	test/t/localjumperror.rb	1	##	COMMENT
LOW	test/t/module.rb	581	# assert_separately [], %{	COMMENT
LOW	test/t/module.rb	601	# a = c.new	COMMENT
LOW	test/t/module.rb	621		COMMENT
LOW	test/t/regexperror.rb	1	##	COMMENT
LOW	test/t/lang.rb	1	# The aim of these tests is to detect pitfall for optimized VM.	COMMENT
LOW	include/mruby.h	41	#endif	COMMENT
LOW	include/mruby.h	61	#define SIZE_MAX __SIZE_MAX__	COMMENT
LOW	include/mruby.h	81	#if (defined __cplusplus && __cplusplus >= 201703L)	COMMENT
LOW	include/mruby.h	121	#define mrb_static_assert_powerof2(num) mrb_static_assert((num) > 0 && (num) == ((num) & -(num)), "need power of 2 for "	COMMENT
LOW	include/mruby.h	1501	MRB_API mrb_value mrb_obj_clone(mrb_state *mrb, mrb_value self);	COMMENT
LOW	include/mruby.h	1541	#define E_STANDARD_ERROR mrb->eStandardError_class	COMMENT
LOW	include/mrbconf.h	41	#if defined(MRB_USE_FLOAT32) && defined(MRB_NO_FLOAT)	COMMENT
LOW	include/mrbconf.h	81	Default for 64-bit CPU mode (unless using MRB_NAN_BOXING). */	COMMENT
LOW	include/mrbconf.h	181		COMMENT
LOW	include/mrbconf.h	221		COMMENT
LOW	include/mrbconf.h	241	# ifndef MRB_METHOD_CACHE_SIZE	COMMENT
LOW	include/mruby/dump.h	41	#define MRB_DUMP_WRITE_FAULT (-2)	COMMENT
LOW	include/mruby/version.h	101	MRUBY_RELEASE_DAY_STR	COMMENT
LOW	include/mruby/presym.h	41	#define MRB_SYM_E(name) MRB_SYM_E__##name	COMMENT
LOW	include/mruby/proc.h	81	#define MRB_PROC_CFUNC_FL 128	COMMENT
LOW	include/mruby/proc.h	181		COMMENT
LOW	include/mruby/boxing_no.h	21	mrb_sym sym;	COMMENT
LOW	include/mruby/boxing_no.h	41	(o).tt = ttt;\	COMMENT
LOW	include/mruby/numeric.h	21	#define TYPED_FIXABLE(f,t) (TYPED_POSFIXABLE(f,t) && TYPED_NEGFIXABLE(f,t))	COMMENT
LOW	include/mruby/numeric.h	141	# define MRB_FLT_MANT_DIG FLT_MANT_DIG	COMMENT
LOW	include/mruby/endian.h	21	# define LITTLE_ENDIAN __ORDER_LITTLE_ENDIAN__	COMMENT
LOW	include/mruby/value.h	41	# define TRUE true	COMMENT
LOW	include/mruby/value.h	61	# define PRIu64 "llu"	COMMENT
LOW	include/mruby/value.h	81	# define MRB_PRIo PRIo64	COMMENT
LOW	include/mruby/value.h	121	# define vsnprintf(s, n, format, arg) mrb_msvc_vsnprintf(s, n, format, arg)	COMMENT
LOW	include/mruby/value.h	201		COMMENT
LOW	include/mruby/value.h	221	# define MRB_SSIZE_MAX INTPTR_MAX	COMMENT
380 more matches not shown…

Decorative Section Separators18 hits · 54 pts

Severity	File	Line	Snippet	Context
MEDIUM	benchmark/vm_optimization_bench.rb	35	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	38	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	61	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	64	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	125	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	128	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	207	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	210	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	264	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	267	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	314	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	317	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	373	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	376	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	424	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	427	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	457	#=============================================================================	COMMENT
MEDIUM	benchmark/vm_optimization_bench.rb	459	#=============================================================================	COMMENT

Self-Referential Comments10 hits · 34 pts

Severity	File	Line	Snippet	Context
MEDIUM	test/assert.rb	54	# Create the assertion in a readable way	COMMENT
MEDIUM⚡	mrbgems/mruby-struct/src/struct.c	252	* # Create a structure with a name in Struct	COMMENT
MEDIUM⚡	mrbgems/mruby-struct/src/struct.c	256	* # Create a structure named by its constant	COMMENT
MEDIUM⚡	mrbgems/mruby-struct/src/struct.c	260	* # Create a structure with keyword initialization	COMMENT
MEDIUM	mrbgems/mruby-task/examples/statistics.rb	29	# Create a monitor task	COMMENT
MEDIUM	mrbgems/mruby-task/examples/simple.rb	7	# Create a simple task	COMMENT
MEDIUM	mrbgems/mruby-task/examples/suspend_resume.rb	9	# Create a worker task	COMMENT
MEDIUM	mrbgems/mruby-task/examples/suspend_resume.rb	19	# Create a controller task	COMMENT
MEDIUM	mrbgems/mruby-task/examples/inspection.rb	29	# Create an observer task	COMMENT
MEDIUM	mrbgems/mruby-data/src/data.c	315	* # Create a structure named by its constant	COMMENT

Fake / Example Data18 hits · 28 pts

Severity	File	Line	Snippet	Context
LOW⚡	mrbgems/mruby-struct/src/struct.c	262	* User.new(id: 1, email: "user@example.com")	COMMENT
LOW⚡	mrbgems/mruby-struct/src/struct.c	263	* #=> #<struct User id=1, email="user@example.com">	COMMENT
LOW	mrbgems/mruby-struct/src/struct.c	586	* jane = Customer.new("Jane Doe", "456 Elm, Anytown NC", 12345)	COMMENT
LOW⚡	mrbgems/mruby-data/README.md	32	customer1 = Customer.new("John Doe", "123 Main St", 12345)	CODE
LOW⚡	mrbgems/mruby-data/README.md	32	customer1 = Customer.new("John Doe", "123 Main St", 12345)	CODE
LOW⚡	mrbgems/mruby-data/README.md	38	customer2 = Customer.new(name: "Jane Doe", address: "456 Oak Ave", zip: 67890)	CODE
LOW	mrbgems/mruby-data/README.md	49	puts customer1.name # Output: "John Doe"	CODE
LOW	mrbgems/mruby-data/README.md	78	# Output: {:name=>"John Doe", :address=>"123 Main St", :zip=>12345}	COMMENT
LOW	mrbgems/mruby-data/README.md	78	# Output: {:name=>"John Doe", :address=>"123 Main St", :zip=>12345}	COMMENT
LOW⚡	mrbgems/mruby-data/README.md	92	puts customer1 # Output: #<data Customer name="John Doe", address="123 Main St", zip=12345>	CODE
LOW⚡	mrbgems/mruby-data/README.md	92	puts customer1 # Output: #<data Customer name="John Doe", address="123 Main St", zip=12345>	CODE
LOW⚡	mrbgems/mruby-data/README.md	93	p customer1 # Output: #<data Customer name="John Doe", address="123 Main St", zip=12345>	CODE
LOW⚡	mrbgems/mruby-data/README.md	93	p customer1 # Output: #<data Customer name="John Doe", address="123 Main St", zip=12345>	CODE
LOW	mrbgems/mruby-data/src/data.c	220	* Customer.new("Joe", "123 Main St", 12345)	COMMENT
LOW	mrbgems/mruby-data/src/data.c	221	* Customer.new(name: "Joe", address: "123 Main St", zip: 12345)	COMMENT
LOW	mrbgems/mruby-data/src/data.c	394	* customer = Customer.new("Joe", "123 Main St", 12345)	COMMENT
LOW	mrbgems/mruby-data/src/data.c	426	* jane = Customer.new("Jane Doe", "456 Elm, Anytown NC", 12345)	COMMENT
LOW	doc/guides/mrbgems.md	278	spec.author = 'John Doe'	CODE

Hyper-Verbose Identifiers12 hits · 14 pts

Severity	File	Line	Snippet	Context
LOW⚡	test/assert.rb	332	def assert_raise_with_message(*args, &block)	CODE
LOW⚡	test/assert.rb	335	def assert_raise_with_message_pattern(*args, &block)	CODE
LOW⚡	test/assert.rb	338	def _assert_raise_with_message(type, exc, exp_msg, msg = nil, &block)	CODE
LOW	test/t/module.rb	24	def assert_uninitialized_const(&block)	CODE
LOW	mrbgems/mruby-io/test/file.rb	6	def assert_dirname_with_level(path, results)	CODE
LOW	mrbgems/mruby-array-ext/test/array.rb	4	def assert_permutation_combination(exp, receiver, meth, *args)	CODE
LOW	mrbgems/mruby-array-ext/test/array.rb	21	def assert_repeated_permutation(exp, receiver, *args)	CODE
LOW	mrbgems/mruby-array-ext/test/array.rb	25	def assert_repeated_combination(exp, receiver, *args)	CODE
LOW	lib/mruby/amalgam.rb	644	def write_static_rename_cleanup(f, collisions)	CODE
LOW	lib/mruby/amalgam.rb	780	def opcode_macro_reconciliation(header)	CODE
LOW	lib/mruby/amalgam.rb	794	def transform_source_includes(content, source_dir = nil)	CODE
LOW	lib/mruby/build.rb	430	def define_installer_if_needed(bin)	CODE

Redundant / Tautological Comments4 hits · 6 pts

Severity	File	Line	Snippet	Context
LOW	mrbgems/mruby-pack/test/pack.rb	66	# Check if last two characters are backtick and newline	COMMENT
LOW	scripts/check_makefiles_for_tabs.sh	5	# Check if the file exists and is a regular file	COMMENT
LOW	lib/mruby/amalgam.rb	901	# Check if header was already processed	COMMENT
LOW	lib/mruby/amalgam.rb	912	# Check if this is an mruby header that should be inlined/transformed	COMMENT

Structural Annotation Overuse3 hits · 4 pts

Severity	File	Line	Snippet	Context
LOW	doc/guides/rom-method-table.md	75	### Step 1: Define the Static Data	COMMENT
LOW	doc/guides/rom-method-table.md	90	### Step 2: Register in the Init Function	COMMENT
LOW	doc/guides/rom-method-table.md	107	### Step 3: Verify	COMMENT

AI Slop Vocabulary1 hit · 2 pts

Severity	File	Line	Snippet	Context
LOW	mrbgems/mruby-proc-ext/mrblib/proc.rb	46	# Instances of class Proc simply return themselves.	COMMENT

Example Usage Blocks1 hit · 2 pts

Severity	File	Line	Snippet	Context
LOW	build_config/cosmopolitan.rb	15	# Usage:	COMMENT

Slop Phrases1 hit · 1 pts

Severity	File	Line	Snippet	Context
LOW	src/gc.c	628	arguments. Don't forget to remove the object using	CODE

Analysis Overview

What These Metrics Mean

Score History

Severity Breakdown

Directory Score Breakdown

Pattern Findings