AI Slop Code Risk Monitor

airbnb/lottie-ios

SlopCodeMonitor badge for airbnb/lottie-ios Adjusted legacy signal; badge bands: 25 / 50 / 75 (different from dashboard bands).

An iOS library to natively render After Effects vector animations

2.4 Low pattern signal View on GitHub

Open-Source Code Quality, Security and Technical Debt Review

This report summarizes scanner evidence for airbnb/lottie-ios, a Swift project with 26,921 GitHub stars. SynthScan examined 69,731 lines of code across 775 source files, recording 148 pattern matches distributed across 2 syntactic categories. The legacy adjusted pattern signal is 2.4 (Low pattern signal); it is not an authorship estimate.

Use the findings to ask whether maintainers can explain intent, verify dependencies, simplify unnecessary scaffolding, and focus review effort. Risk Payload v1 adds ownership, supply-chain, over-engineering, and review-effort vectors when available. These are prompts for human verification, not probabilities, security findings, or measured maintenance costs.

2.4
Adjusted Signal
2.4
Raw Pattern Score
100%
Time Factor
2026-10-06
Last Push
26.9K
Stars
Swift
Language
69.7K
Lines of Code
775
Files
148
Pattern Hits
2026-10-31
Scan Date
0.00
HC Hit Rate

Risk Review · Payload v1

Use each vector to guide manual verification of the underlying findings.

Payload schema: 1.0.0 · Engine: 2.0.0 · Scoring: heuristic-density-v1 · Scan date: 2026-10-31.

Cognitive Ownership Risk 9.7/100 · LOW

Can maintainers explain intent, assumptions, and trade-offs? 142 finding(s).

Hallucinated Dependency & Supply Chain Risk 0.0/100 · LOW

Are imports declared and package/API names verified? 0 finding(s).

Agent Over-Engineering Ratio 1.7/100 · LOW

Are wrappers, guards, and repeated structures necessary? 6 finding(s).

PR Review Velocity Impact 10.8/100 · LOW

Which changes need focused human review? 148 finding(s).

What These Metrics Mean

Adjusted Signal
Legacy pattern score normalized per 1,000 scanned lines and multiplied by the repository-level time factor. It is not an estimate of AI authorship.
Raw Pattern Score
Sum of severity- and context-weighted pattern findings before applying the time factor.
Time Factor
A coarse multiplier based on repository last-push metadata. It does not identify when individual code was written.
Pattern Hits
Count of configured pattern findings. Review each location and surrounding code before acting.
HC Hit Rate
High- and critical-severity findings per scanned file. Severity is a configured detector weight, not proof of a vulnerability or authorship.
Lines / Files
Scan coverage denominators used by the legacy normalized score.

Pattern-Signal History

This chart tracks the legacy adjusted pattern score across scan runs. Changes can reflect source changes, scan coverage, or detector/scoring versions; they do not measure AI adoption or prove that a team refactored code. Compare runs only when their scoring versions are compatible. The dashed line tracks the raw pattern-hit count.

Severity Breakdown

Groups findings by configured severity weight. Severity is not a confidence estimate, security rating, or proof that a package is missing. Verify imports against the project's manifests and inspect each finding in its local design context.

CRITICAL 0HIGH 0MEDIUM 6LOW 142

Directory Score Breakdown

This horizontal bar chart shows where configured pattern scores accumulate across directories. Treat the bars as locations to inspect, not as evidence of authorship or code quality. Use the file-level findings to decide whether a directory needs a focused ownership, dependency, complexity, or review check.

Pattern Findings

The scanner identified 148 distinct pattern matches across 2 syntactic categories. Each entry below represents a discrete location in the source code where the engine recorded a detector match to inspect in context. 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 configured finding weight (CRITICAL / HIGH / MEDIUM / LOW). The Context column identifies whether the match occurred inside executable code, an inline comment, or a string literal — legacy comment-context matches receive a ×1.5 score weight. The ⚡ bolt icon marks clustered matches: three or more patterns within a 10-line window, each receiving an additional ×1.5 density multiplier under the legacy scoring model.

Over-Commented Block142 hits · 142 pts
SeverityFileLineSnippetContext
LOWTests/SnapshotConfiguration.swift1// Created by Cal Stephens on 12/15/21.COMMENT
LOWSources/Public/DotLottie/DotLottieFile.swift1//COMMENT
LOWSources/Public/DotLottie/DotLottieFile.swift181COMMENT
LOWSources/Public/DotLottie/DotLottieConfiguration.swift1//COMMENT
LOWSources/Public/DotLottie/DotLottieFileHelpers.swift1//COMMENT
LOW…es/Public/DotLottie/Cache/DotLottieCacheProvider.swift1//COMMENT
LOWSources/Public/DotLottie/Cache/DotLottieCache.swift1//COMMENT
LOWSources/Public/DotLottie/Cache/DotLottieCache.swift61// MARK: @unchecked SendableCOMMENT
LOWSources/Public/Configuration/LottieConfiguration.swift21 self.reducedMotionOption = reducedMotionOptionCOMMENT
LOW…urces/Public/Configuration/RenderingEngineOption.swift1// Created by Cal Stephens on 7/14/23.COMMENT
LOW…urces/Public/Configuration/RenderingEngineOption.swift21 .specific(.mainThread)COMMENT
LOWSources/Public/Configuration/ReducedMotionOption.swift1// Created by Cal Stephens on 7/14/23.COMMENT
LOWSources/Public/Configuration/DecodingStrategy.swift1// Created by Cal Stephens on 7/14/23.COMMENT
LOWSources/Public/macOS/BundleImageProvider.macOS.swift1//COMMENT
LOWSources/Public/macOS/FilepathImageProvider.macOS.swift1//COMMENT
LOWSources/Public/Animation/LottieAnimationLayer.swift281 toFrame: from.frameTime + from.durationFrameTime,COMMENT
LOWSources/Public/Animation/LottieAnimationLayer.swift561 /// synchronously (when loading a `LottieAnimation` from a .json file on disk)COMMENT
LOWSources/Public/Animation/LottieAnimationLayer.swift821COMMENT
LOWSources/Public/Animation/LottieAnimationLayer.swift861 valueProviders[valueProvider.key] = nilCOMMENT
LOWSources/Public/Animation/LottieAnimationView.swift1//COMMENT
LOWSources/Public/Animation/LottieAnimationView.swift21 /// The completion block is stored and called when the animation completes.COMMENT
LOWSources/Public/Animation/LottieAnimationView.swift241 ///COMMENT
LOWSources/Public/Animation/LottieAnimationView.swift261 open func play(COMMENT
LOWSources/Public/Animation/LottieAnimationView.swift301 /// Plays the animation from a named marker to the end of the marker's duration.COMMENT
LOWSources/Public/Animation/LottieAnimationView.swift321 /// A marker is a point in time with an associated duration that is encoded into theCOMMENT
LOWSources/Public/Animation/LottieAnimationView.swift381 public var animateLayoutChangesWithCurrentCoreAnimationContext = trueCOMMENT
LOWSources/Public/Animation/LottieAnimationView.swift401 public var configuration: LottieConfiguration {COMMENT
LOWSources/Public/Animation/LottieAnimationView.swift441 /// animation is loaded and applied, so can be a useful way to configure thisCOMMENT
LOWSources/Public/Animation/LottieAnimationView.swift621 /// of properties that have to be re-rendered on each frame. There are some casesCOMMENT
LOWSources/Public/Animation/LottieAnimationView.swift681 /// A value provider provides a typed value on a frame by frame basis.COMMENT
LOWSources/Public/Animation/LottieAnimationView.swift701 public func removeValueProvider(for keypath: AnimationKeypath) {COMMENT
LOWSources/Public/Animation/LottieAnimationView.swift741 /// Furthermore the subview will be in the child layers coordinate space.COMMENT
LOWSources/Public/Animation/LottieAnimationView.swift801 /// Sets the enabled state of all animator nodes found with the keypath search.COMMENT
LOWSources/Public/Animation/LottieAnimationView.swift821COMMENT
LOWSources/Public/Animation/LottieAnimationView.swift961 @unknown default:COMMENT
LOW…Public/Animation/LottieAnimationViewInitializers.swift1//COMMENT
LOWSources/Public/Animation/LottieView.swift21 ///COMMENT
LOWSources/Public/Animation/LottieView.swift61 /// ```COMMENT
LOWSources/Public/Animation/LottieAnimationHelpers.swift241 /// does not need to update playback code.COMMENT
LOWSources/Public/Animation/LottiePlaybackMode.swift81 /// - Parameter fromFrame: The start frame of the animation. If `nil` the animation will start at the current frame.COMMENT
LOWSources/Public/Animation/LottiePlaybackMode.swift101 /// represents the beginning of the next section, it should be false.COMMENT
LOWSources/Public/Animation/LottiePlaybackMode.swift121 loopMode: LottieLoopModeCOMMENT
LOWSources/Public/Animation/LottiePlaybackMode.swift181 .fromFrame(nil, toFrame: toFrame, loopMode: loopMode)COMMENT
LOW…rces/Public/ImageProvider/AnimationImageProvider.swift1//COMMENT
LOWSources/Public/iOS/FilepathImageProvider.swift1//COMMENT
LOWSources/Public/iOS/BundleImageProvider.swift1//COMMENT
LOWSources/Public/iOS/LottieAnimationViewBase.swift1//COMMENT
LOW…Public/iOS/Compatibility/CompatibleAnimationView.swift101 /// Pause the animation and restart it when the application moves to the foreground.COMMENT
LOWSources/Public/Controls/AnimatedSwitch.swift1//COMMENT
LOWSources/Public/Controls/AnimatedButton.swift1//COMMENT
LOWSources/Public/Controls/AnimatedControl.swift1//COMMENT
LOWSources/Public/Controls/AnimatedControl.swift21/// user actions.COMMENT
LOWSources/Public/Keyframes/Interpolatable.swift1// Created by Cal Stephens on 1/24/22.COMMENT
LOWSources/Public/Keyframes/Interpolatable.swift21 /// ```COMMENT
LOW…urces/Public/AnimationCache/LottieAnimationCache.swift1//COMMENT
LOW…ces/Public/AnimationCache/AnimationCacheProvider.swift1//COMMENT
LOW…rces/Public/AnimationCache/DefaultAnimationCache.swift1//COMMENT
LOW…rces/Public/AnimationCache/DefaultAnimationCache.swift61// MARK: @unchecked SendableCOMMENT
LOWSources/Public/TextProvider/AnimationTextProvider.swift1//COMMENT
LOWSources/Public/TextProvider/AnimationTextProvider.swift21/// Legacy protocol for providing dynamic text for a Lottie animation.COMMENT
82 more matches not shown…
Decorative Section Separators6 hits · 24 pts
SeverityFileLineSnippetContext
MEDIUM…ation/Animations/CAAnimation+TimingConfiguration.swift18 // ┌──────────────────────────────────┐COMMENT
MEDIUM…ation/Animations/CAAnimation+TimingConfiguration.swift20 // └──────────────────────────────────┘COMMENT
MEDIUM⚡…ation/Animations/CAAnimation+TimingConfiguration.swift32 // ┌────────────────────┬───────►COMMENT
MEDIUM⚡…ation/Animations/CAAnimation+TimingConfiguration.swift34 // └────────────────────┴───────►COMMENT
MEDIUM⚡…ation/Animations/CAAnimation+TimingConfiguration.swift36 // ┌──────────────────────────────────┐COMMENT
MEDIUM⚡…ation/Animations/CAAnimation+TimingConfiguration.swift38 // └──────────────────────────────────┘COMMENT