Repository Analysis

FluidGroup/Brightroom

📷 A composable image editor using Core Image and Metal.

3.0 Likely human-written View on GitHub

Analysis Overview

This report presents the forensic synthetic code analysis of FluidGroup/Brightroom, a Swift project with 3,652 GitHub stars. SynthScan v2.0 examined 39,669 lines of code across 201 source files, recording 118 pattern matches distributed across 2 syntactic categories. The overall adjusted score of 3.0 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).

3.0
Adjusted Score
3.0
Raw Score
100%
Time Factor
2026-07-05
Last Push
3.7K
Stars
Swift
Language
39.7K
Lines of Code
201
Files
118
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

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 0LOW 118

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 118 distinct pattern matches across 2 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 Block117 hits · 117 pts
SeverityFileLineSnippetContext
LOWswiftgen.yml1## Note: all of the config entries below are just examples with placeholders. Be sure to edit and adjust to your needs wCOMMENT
LOWswiftgen.yml21## - Especially the `forceProvidesNamespaces: true` param forces to create sub-namespace for each folder/group used inCOMMENT
LOWswiftgen.yml41# output: IB-Scenes+Generated.swiftCOMMENT
LOWSources/BrightroomEngine/BrightroomEngine.swift1//COMMENT
LOWSources/BrightroomEngine/DataSource/ImageProvider.swift1//COMMENT
LOWSources/BrightroomEngine/DataSource/ImageSource.swift1//COMMENT
LOW…/BrightroomEngine/Core/EditingStack.CropModifier.swift1//COMMENT
LOW…rces/BrightroomEngine/Core/EditingDocumentBridge.swift1//COMMENT
LOW…rces/BrightroomEngine/Core/EditingDocumentBridge.swift41 case throughFinalCropExclusiveCOMMENT
LOWSources/BrightroomEngine/Core/EditingStack.swift1//COMMENT
LOWSources/BrightroomEngine/Core/ParameterRange.swift1//COMMENT
LOW…s/BrightroomEngine/Core/LocalAdjustmentRendering.swift1//COMMENT
LOW…s/BrightroomEngine/Core/LocalAdjustmentRendering.swift121COMMENT
LOWSources/BrightroomEngine/Core/EditingStack.Edit.swift1//COMMENT
LOWSources/BrightroomEngine/Core/EditingStack.Edit.swift21COMMENT
LOW…es/BrightroomEngine/Core/EditingStackFeatureTree.swift1//COMMENT
LOW…es/BrightroomEngine/Core/EditingStackFeatureTree.swift41 case outputCOMMENT
LOWSources/BrightroomEngine/Library/Geometry.swift1//COMMENT
LOWSources/BrightroomEngine/Library/EngineLog.swift1//COMMENT
LOWSources/BrightroomEngine/Library/CIImage+.swift1//COMMENT
LOWSources/BrightroomEngine/Library/EngineSanitizer.swift1//COMMENT
LOWSources/BrightroomEngine/Library/CropGeometry.swift1//COMMENT
LOWSources/BrightroomEngine/Library/CropGeometry.swift21COMMENT
LOWSources/BrightroomEngine/Library/InternalUtils.swift1//COMMENT
LOWSources/BrightroomEngine/Library/Optional+.swift1//COMMENT
LOWSources/BrightroomEngine/Engine/CoreGraphics+.swift1//COMMENT
LOWSources/BrightroomEngine/Engine/RenderCrop.swift1//COMMENT
LOWSources/BrightroomEngine/Engine/ImageTool.swift1//COMMENT
LOW…BrightroomEngine/Engine/EditingSourcePreparation.swift1import CoreImageCOMMENT
LOW…BrightroomEngine/Engine/EditingSourcePreparation.swift21/// `MTKTextureLoader`, which quantized to 8-bit, could not handle 16-bitCOMMENT
LOW…BrightroomEngine/Engine/EditingSourcePreparation.swift41 /// produced here lives on the same device the canvas samples it from (iOS hasCOMMENT
LOW…/BrightroomEngine/Engine/BrightRoomImageRenderer.swift1//COMMENT
LOWSources/BrightroomUI/Shared/BrightroomUI.swift1//COMMENT
LOW…rces/BrightroomUI/Shared/Utils/CropEditingState+.swift1//COMMENT
LOWSources/BrightroomUI/Shared/Utils/EditorLog.swift1//COMMENT
LOW…oomUI/Shared/Components/LoadingBlurryOverlayView.swift1//COMMENT
LOW…I/Shared/Components/Crop/CropViewMaskingDefaults.swift1import UIKitCOMMENT
LOW…I/Shared/Components/Crop/CropViewMaskingDefaults.swift41COMMENT
LOW…ghtroomUI/Shared/Components/Crop/CropDisplayView.swift1import CoreGraphicsCOMMENT
LOW…omUI/Shared/Components/Crop/CropViewFeatureFocus.swift1//COMMENT
LOW…omUI/Shared/Components/Crop/CropViewFeatureFocus.swift21COMMENT
LOW…omUI/Shared/Components/Crop/CropViewFeatureFocus.swift41/// - Points before the final crop show the pre-crop image domain. PartialCOMMENT
LOW…omUI/Shared/Components/Crop/CropViewFeatureFocus.swift61 /// `EditingCanvasStrokeCommitPipeline` semantics.COMMENT
LOW…/Shared/Components/Crop/CropView._CropScrollView.swift1//COMMENT
LOW…htroomUI/Shared/Components/Crop/CropEditingState.swift1//COMMENT
LOW…htroomUI/Shared/Components/Crop/CropEditingState.swift21COMMENT
LOW…ces/BrightroomUI/Shared/Components/Crop/CropView.swift1//COMMENT
LOW…ces/BrightroomUI/Shared/Components/Crop/CropView.swift21COMMENT
LOW…ces/BrightroomUI/Shared/Components/Crop/CropView.swift41/// crop frame while showing the result of earlier Tool Features. Mask editing,COMMENT
LOW…ces/BrightroomUI/Shared/Components/Crop/CropView.swift961 self.debugLogScrollViewAdjustment("did-zoom")COMMENT
LOW…ces/BrightroomUI/Shared/Components/Crop/CropView.swift1581 /// animation state. Used at zoom-bounce-ride start, where the modelCOMMENT
LOW…ces/BrightroomUI/Shared/Components/Crop/CropView.swift1681 // while the scroll view's model values are already clamped to the minimumCOMMENT
LOW…ces/BrightroomUI/Shared/Components/Crop/CropView.swift2281 )COMMENT
LOW…mponents/Crop/CropView._InteractiveCropGuideView.swift1//COMMENT
LOW…BrightroomUI/Shared/Components/Crop/CropRotation.swift1//COMMENT
LOW…ghtroomUI/Shared/Components/Crop/SwiftUICropView.swift1//COMMENT
LOW…Components/SteppedSlider/BrightroomSteppedSlider.swift1//COMMENT
LOW…ed/Components/EditingCanvas/EditingCanvasMTKView.swift1101 /// changes and is dropped separately by `invalidatePreparedContentLayers`COMMENT
LOW…/EditingCanvas/EditingCanvasStrokeCommitPipeline.swift1import FoundationCOMMENT
LOW…d/Components/EditingCanvas/EditingCanvasGeometry.swift41 // the canvas clamp Display-P3 to sRGB. The four contracts below keep wideCOMMENT
57 more matches not shown…
Hyper-Verbose Identifiers1 hit · 1 pts
SeverityFileLineSnippetContext
LOWDev/Bundle/LUTs/Import LUT/ActionRequestHandler.swift12class ActionRequestHandler: NSObject, NSExtensionRequestHandling {CODE