Repository Analysis

Vita3K/Vita3K

Experimental PlayStation Vita emulator

4.3 Likely human-written View on GitHub

Analysis Overview

This report presents the forensic synthetic code analysis of Vita3K/Vita3K, a C++ project with 5,562 GitHub stars. SynthScan v2.0 examined 243,158 lines of code across 967 source files, recording 1092 pattern matches distributed across 8 syntactic categories. The overall adjusted score of 4.3 places this repository in the Likely human-written band.

The scanner applied 160+ deterministic lexical heuristics, multi-line block detectors, abstract syntax tree depth profilers, and a cross-file Jaccard similarity matrix to construct a statistically normalised synthetic code estimate. All matches are individually weighted by severity coefficient and contextual multiplier before summation, and the resulting headline score is temporally discounted to account for the repository's development history relative to the commercial emergence of large language model coding tooling (November 2022 onward).

4.3
Adjusted Score
4.3
Raw Score
100%
Time Factor
2026-08-02
Last Push
5.6K
Stars
C++
Language
243.2K
Lines of Code
967
Files
1.1K
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 1HIGH 0MEDIUM 3LOW 1088

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 1092 distinct pattern matches across 8 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 Block1082 hits · 1024 pts
SeverityFileLineSnippetContext
LOWtools/native-tool/src/shaders.h1// Vita3K emulator projectCOMMENT
LOWtools/native-tool/src/main.cpp1// Vita3K emulator projectCOMMENT
LOWtools/gen-modules/gen-modules.cpp1// Vita3K emulator projectCOMMENT
LOWtools/usse-decoder-gen/grammar.yaml1501# description: Emit OutputCOMMENT
LOWtools/usse-decoder-gen/grammar.yaml1521# - src1_bank_ext:COMMENT
LOWtools/usse-decoder-gen/grammar.yaml1541# offset: 35COMMENT
LOWexternal/CMakeLists.txt441 # Disable Tracy crash handler. Don't stop tracing on first AV.COMMENT
LOWexternal/CppCommon/source/environment.cpp21#include <regex>COMMENT
LOWexternal/CppCommon/source/cpu.cpp1/*!COMMENT
LOWexternal/miniz/miniz.c3061#endifCOMMENT
LOWexternal/miniz/miniz.c3121#elseCOMMENT
LOWexternal/miniz/miniz.c3141#define MZ_FILE_STAT_STRUCT _statCOMMENT
LOWexternal/miniz/miniz.c3161#define MZ_FILE_STAT_STRUCT statCOMMENT
LOWexternal/miniz/miniz.c3181#define MZ_DELETE_FILE removeCOMMENT
LOWexternal/miniz/miniz.c3201#include <utime.h>COMMENT
LOWexternal/miniz/miniz.c3221#define MZ_FCLOSE fcloseCOMMENT
LOWexternal/miniz/miniz.h161 callbacks to the zlib and archive API's, and a few stand-alone helper API's which don't provide custom userCOMMENT
LOWexternal/miniz/miniz.h181#include <time.h>COMMENT
LOWexternal/miniz/miniz.h201COMMENT
LOWexternal/miniz/miniz.h221#if !defined(MINIZ_USE_UNALIGNED_LOADS_AND_STORES)COMMENT
LOWexternal/miniz/miniz.h461 typedef char charf;COMMENT
LOWexternal/miniz/miniz.h481#define Z_BUF_ERROR MZ_BUF_ERRORCOMMENT
LOWexternal/miniz/miniz.h601#define ZLIB_VER_MINOR MZ_VER_MINORCOMMENT
LOWexternal/miniz/miniz.h641#ifdef _MSC_VERCOMMENT
LOWexternal/miniz/miniz.h661#elseCOMMENT
LOWexternal/miniz/miniz.h681#define MZ_CLEAR_PTR(obj) memset((obj), 0, sizeof(*obj))COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h1//_____________________________________________________________/\_______________________________________________________COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h21// The above copyright notice and this permission notice shall be included inCOMMENT
LOWexternal/GPUOpen/ffx_fsr1.h41// [RCAS] Robust Contrast Adaptive Sharpening .... A non-scaling variation on CAS.COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h61////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h81//----------------------------------------------------------------------------------------------------------------------COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h101// #include "ffx_a.h"COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h121// #define A_HLSL 1COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h141// To use FsrEasuCon() on the CPU, define A_CPU before including ffx_a and ffx_fsr1.COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h181 // | | |COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h321 AU4 con3){COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h401 // Anisotropic length after rotation,COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h601//COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h621// Then chooses the 'w' which results in no clipping, limits 'w', and multiplies by the 'sharp' amount.COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h641// Including a GPU example here, the 'con' value would be stored out to a constant buffer.COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h661// Call to setup required constant values (works on CPU or GPU).COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h761 #ifdef FSR_RCAS_DENOISECOMMENT
LOWexternal/GPUOpen/ffx_fsr1.h861 #endifCOMMENT
LOWexternal/GPUOpen/ffx_fsr1.h981 AH2 rcpL=APrxMedRcpH2(AH2_(4.0)*lobe+AH2_(1.0));COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h1001// Grain application should be done in a linear colorspace.COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h1021 // Packed half precision version (faster).COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h1041//======================================================================================================================COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h1061//_____________________________________________________________/\_______________________________________________________COMMENT
LOWexternal/GPUOpen/ffx_fsr1.h1081//======================================================================================================================COMMENT
LOWexternal/GPUOpen/ffx_a.h1//======================================================================================================================COMMENT
LOWexternal/GPUOpen/ffx_a.h21// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,COMMENT
LOWexternal/GPUOpen/ffx_a.h41//----------------------------------------------------------------------------------------------------------------------COMMENT
LOWexternal/GPUOpen/ffx_a.h61// A_WAVE .... Support wave-wide operations.COMMENT
LOWexternal/GPUOpen/ffx_a.h81// - Make sure 'ALerp*(a,b,m)' does 'b*m+(-a*m+a)' (2 ops).COMMENT
LOWexternal/GPUOpen/ffx_a.h101//_____________________________________________________________/\_______________________________________________________COMMENT
LOWexternal/GPUOpen/ffx_a.h141 A_STATIC AU1 AU1_AF1(AF1 a){union{AF1 f;AU1 u;}bits;bits.f=a;return bits.u;}COMMENT
LOWexternal/GPUOpen/ffx_a.h161////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////COMMENT
LOWexternal/GPUOpen/ffx_a.h181 #define inAD3 AD1 *A_RESTRICTCOMMENT
LOWexternal/GPUOpen/ffx_a.h201 #define inoutAL4 AL1 *A_RESTRICTCOMMENT
LOWexternal/GPUOpen/ffx_a.h221 #define varAD4(x) AD1 x[4]COMMENT
1022 more matches not shown…
Hallucination Indicators1 hit · 10 pts
SeverityFileLineSnippetContext
CRITICAL…g/vita3k/emulator/ui/screens/settings/SettingsRoute.kt619 verticalArrangement = androidx.compose.foundation.layout.Arrangement.spacedBy(16.dp)CODE
Slop Phrases3 hits · 4 pts
SeverityFileLineSnippetContext
LOWvita3k/renderer/src/vulkan/surface_cache.cpp113 // don't forget to destroy in the right orderCOMMENT
LOWvita3k/renderer/src/vulkan/creation.cpp236 // don't forget to destroy the framebuffersCOMMENT
LOWvita3k/shader/include/shader/uniform_block.h22// it is put next to the RenderVertUniformBlock so we don't forget to update both fields every timeCOMMENT
AI Slop Vocabulary2 hits · 4 pts
SeverityFileLineSnippetContext
MEDIUM…a/org/vita3k/emulator/ui/screens/InitialSetupScreen.kt71 """<div align="center">To get started, please install all PS Vita firmware files.<br><br>A comprehensive guide is avSTRING
MEDIUMexternal/ddspp/ddspp.h841 // likely written by D3DX. The more robust solution is to use the 'DX10'COMMENT
Decorative Section Separators1 hit · 3 pts
SeverityFileLineSnippetContext
MEDIUMexternal/CMakeLists.txt460# ----------------------------------------------------------------------------------------COMMENT
Redundant / Tautological Comments1 hit · 2 pts
SeverityFileLineSnippetContext
LOWtools/usse-decoder-gen/autogen.py10# Set this to true to indent the annotation string in line with the match stringCOMMENT
TODO Padding1 hit · 2 pts
SeverityFileLineSnippetContext
LOWvita3k/modules/SceCommonDialog/SceCommonDialog.cpp389 // TODO: implement the remaining system message typesCOMMENT
Unused Imports1 hit · 1 pts
SeverityFileLineSnippetContext
LOWtools/i18n/generate_lang_catalog.py1CODE