Repository Analysis

SuperTux/supertux

SuperTux source code

7.6 Low AI signal View on GitHub

Analysis Overview

This report presents the forensic synthetic code analysis of SuperTux/supertux, a C++ project with 3,117 GitHub stars. SynthScan v2.0 examined 161,095 lines of code across 1116 source files, recording 1206 pattern matches distributed across 7 syntactic categories. The overall adjusted score of 7.6 places this repository in the Low AI signal 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).

7.6
Adjusted Score
7.6
Raw Score
100%
Time Factor
2026-08-09
Last Push
3.1K
Stars
C++
Language
161.1K
Lines of Code
1.1K
Files
1.2K
Pattern Hits
2026-08-09
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 5LOW 1201

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 1206 distinct pattern matches across 7 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 Block1195 hits · 1195 pts
SeverityFileLineSnippetContext
LOWCMakeLists.txt1#COMMENT
LOWCMakeLists.txt21#COMMENT
LOWtools/bwrap-supertux.sh1#!/bin/shCOMMENT
LOWtools/upload_supertux_wiki.sh1#! /bin/bashCOMMENT
LOWtools/font-add-border.py1#!/usr/bin/env python3COMMENT
LOWtools/sexpr.py1#!/usr/bin/env python3COMMENT
LOWtools/build-addon-index.py1#!/usr/bin/env python3COMMENT
LOWtools/png_recompress.sh1#!/bin/bashCOMMENT
LOWtools/bootstrap-android-project.sh1#!/bin/bashCOMMENT
LOWtools/levelconverter-0.1.3_0.2.0.pl1#!/usr/bin/perlCOMMENT
LOWtools/levelconverter-0.1.3_0.2.0.pl21# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.COMMENT
LOWtools/scripting_docs_gen/class.hpp1// SuperTux - Scripting reference generatorCOMMENT
LOWtools/scripting_docs_gen/util.cpp1// SuperTux - Scripting reference generatorCOMMENT
LOWtools/scripting_docs_gen/CMakeLists.txt1# SuperTux - Scripting reference generatorCOMMENT
LOWtools/scripting_docs_gen/parser.hpp1// SuperTux - Scripting reference generatorCOMMENT
LOWtools/scripting_docs_gen/writer.hpp1// SuperTux - Scripting reference generatorCOMMENT
LOWtools/scripting_docs_gen/util.hpp1// SuperTux - Scripting reference generatorCOMMENT
LOWtools/scripting_docs_gen/parser.cpp1// SuperTux - Scripting reference generatorCOMMENT
LOWtools/scripting_docs_gen/main.cpp1// SuperTux - Scripting reference generatorCOMMENT
LOWtools/scripting_docs_gen/writer.cpp1// SuperTux - Scripting reference generatorCOMMENT
LOWtools/darwin/makebundle.pl1#!/opt/local/bin/perlCOMMENT
LOWtools/tilemanager/Tile.cs21 /// <remarks>COMMENT
LOWtests/unit/reader_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/ifile_stream_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/string_util_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/uid_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/rectf_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/rect_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/md5_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/sizef_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/object_option_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/file_system_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/collision_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/version_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/size_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/aatriangle_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/dynamic_scoped_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/random_test.cpp1// SuperTuxCOMMENT
LOWtests/unit/st_assert.hpp1// st_assert.hpp - Assert function for testsCOMMENT
LOWtests/unit/util/colorspace_oklab.cpp1// SuperTuxCOMMENT
LOWmk/emscripten/AL/al.h1#ifndef OPENAL_AL_H__COMMENT
LOWmk/emscripten/AL/al.h21#define AL_EXPONENT_DISTANCE 0xD005COMMENT
LOWmk/emscripten/AL/al.h41#define AL_LINEAR_DISTANCE 0xD003COMMENT
LOWmk/emscripten/AL/al.h61#define AL_SEC_OFFSET 0x1024COMMENT
LOWmk/emscripten/AL/alc.h1#ifndef OPENAL_ALC_H__COMMENT
LOWmk/emscripten/AL/alc.h21#define ALC_EXT_CAPTURE 1COMMENT
LOW.github/workflows/windows.yml1# SuperTuxCOMMENT
LOW.github/workflows/scripting.yml1# SuperTuxCOMMENT
LOW.github/workflows/wasm.yml1# SuperTuxCOMMENT
LOW.github/workflows/lint.yml1# SuperTuxCOMMENT
LOW.github/workflows/translation_templates.yml1# SuperTuxCOMMENT
LOW.github/workflows/macos.yml1# SuperTuxCOMMENT
LOW.github/workflows/translations.yml1# SuperTuxCOMMENT
LOW.github/workflows/flatpak.yml1# SuperTuxCOMMENT
LOW.github/workflows/freebsd.yml1# SuperTuxCOMMENT
LOW.github/workflows/android.yml1# SuperTuxCOMMENT
LOW.github/workflows/gnulinux.yml1# SuperTuxCOMMENT
LOW.github/workflows/gnulinux.yml201 run: |COMMENT
LOW.github/workflows/wiki.yml1# SuperTuxCOMMENT
LOWexternal/SDL_SavePNG/savepng.c1/*COMMENT
1135 more matches not shown…
AI Slop Vocabulary4 hits · 12 pts
SeverityFileLineSnippetContext
MEDIUMsrc/object/powerup.cpp118 // Older levels utilize hardcoded behaviour from the chosen spriteCOMMENT
MEDIUMsrc/object/weak_block.cpp40 // Older levels utilize hardcoded behaviour from the "linked" property.COMMENT
MEDIUMsrc/supertux/tile_set_parser.cpp322 // b) so that the resulting 'tiles' entry is more robust,COMMENT
MEDIUMsrc/supertux/savegame.cpp302 // But i'd really love to actually utilize this save list here, but for now weCOMMENT
Decorative Section Separators1 hit · 3 pts
SeverityFileLineSnippetContext
MEDIUMCMakeLists.txt23# -------------COMMENT
Deep Nesting3 hits · 3 pts
SeverityFileLineSnippetContext
LOWtools/sexpr.py23CODE
LOWtools/build-addon-index.py93CODE
LOWtools/build-addon-index.py36CODE
Example Usage Blocks1 hit · 2 pts
SeverityFileLineSnippetContext
LOWtools/levelconverter-0.1.3_0.2.0.pl28# Usage:COMMENT
TODO Padding1 hit · 2 pts
SeverityFileLineSnippetContext
LOWsrc/badguy/stumpy.cpp130 // TODO: Handle exception or add relevant logic here.COMMENT
Excessive Try-Catch Wrapping1 hit · 1 pts
SeverityFileLineSnippetContext
LOWtools/build-addon-index.py108 except Exception as e:CODE