Repository Analysis

projectlombok/lombok

Very spicy additions to the Java programming language.

19.6 Moderate AI signal View on GitHub

Analysis Overview

This report presents the forensic synthetic code analysis of projectlombok/lombok, a Java project with 13,474 GitHub stars. SynthScan v2.0 examined 141,802 lines of code across 2054 source files, recording 254 pattern matches distributed across 8 syntactic categories. The overall adjusted score of 19.6 places this repository in the Moderate 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).

19.6
Adjusted Score
19.6
Raw Score
100%
Time Factor
2026-08-07
Last Push
13.5K
Stars
Java
Language
141.8K
Lines of Code
2.1K
Files
254
Pattern Hits
2026-08-09
Scan Date
0.11
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 219HIGH 0MEDIUM 7LOW 28

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 254 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.

Hallucination Indicators219 hits · 2730 pts
SeverityFileLineSnippetContext
CRITICALtest/core/src/lombok/RunTestsViaEcj.java240 org.eclipse.jdt.internal.core.CompilationUnit ccu = new org.eclipse.jdt.internal.core.CompilationUnit(null, null, nulCODE
CRITICAL…ource/after-delombok/CheckerFrameworkSuperBuilder.java91 public abstract C build(CheckerFrameworkSuperBuilder.Parent.@org.checkerframework.checker.calledmethods.qual.CalledMeCODE
CRITICAL…ource/after-delombok/CheckerFrameworkSuperBuilder.java118 public CheckerFrameworkSuperBuilder.Parent build(CheckerFrameworkSuperBuilder.Parent.@org.checkerframework.checker.caCODE
CRITICAL…ource/after-delombok/CheckerFrameworkSuperBuilder.java198 public abstract C build(CheckerFrameworkSuperBuilder.ZChild.@org.checkerframework.checker.calledmethods.qual.CalledMeCODE
CRITICAL…ource/after-delombok/CheckerFrameworkSuperBuilder.java225 public CheckerFrameworkSuperBuilder.ZChild build(CheckerFrameworkSuperBuilder.ZChild.@org.checkerframework.checker.caCODE
CRITICAL…sform/resource/after-delombok/JacksonizedOnRecord.java8@com.fasterxml.jackson.databind.annotation.JsonDeserialize(builder = JacksonizedOnRecord.JacksonizedOnRecordBuilder.clasCODE
CRITICAL…sform/resource/after-delombok/JacksonizedOnRecord.java14 @com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder(withPrefix = "", buildMethodName = "build")CODE
CRITICAL…/resource/after-delombok/BuilderSingularGuavaMaps.java35 if (this.battleaxes == null) this.battleaxes = com.google.common.collect.ImmutableMap.builder();CODE
CRITICAL…/resource/after-delombok/BuilderSingularGuavaMaps.java45 if (this.battleaxes == null) this.battleaxes = com.google.common.collect.ImmutableMap.builder();CODE
CRITICAL…/resource/after-delombok/BuilderSingularGuavaMaps.java58 if (this.vertices == null) this.vertices = com.google.common.collect.ImmutableSortedMap.naturalOrder();CODE
CRITICAL…/resource/after-delombok/BuilderSingularGuavaMaps.java68 if (this.vertices == null) this.vertices = com.google.common.collect.ImmutableSortedMap.naturalOrder();CODE
CRITICAL…/resource/after-delombok/BuilderSingularGuavaMaps.java81 if (this.rawMap == null) this.rawMap = com.google.common.collect.ImmutableBiMap.builder();CODE
CRITICAL…/resource/after-delombok/BuilderSingularGuavaMaps.java91 if (this.rawMap == null) this.rawMap = com.google.common.collect.ImmutableBiMap.builder();CODE
CRITICAL…m/resource/after-delombok/CheckerFrameworkBuilder.java98 public CheckerFrameworkBuilder build(CheckerFrameworkBuilder.@org.checkerframework.checker.calledmethods.qual.CalledMeCODE
CRITICAL…orm/resource/after-delombok/BuilderWithDeprecated.java99 if (this.numbers == null) this.numbers = com.google.common.collect.ImmutableList.builder();CODE
CRITICAL…orm/resource/after-delombok/BuilderWithDeprecated.java110 if (this.numbers == null) this.numbers = com.google.common.collect.ImmutableList.builder();CODE
CRITICAL…t/transform/resource/after-delombok/LoggerCommons.java4 private static final org.apache.commons.logging.Log log = org.apache.commons.logging.LogFactory.getLog(LoggerCommons.clCODE
CRITICAL…t/transform/resource/after-delombok/LoggerCommons.java9 private static final org.apache.commons.logging.Log log = org.apache.commons.logging.LogFactory.getLog(LoggerCommonsWitCODE
CRITICAL…t/transform/resource/after-delombok/LoggerCommons.java14 private static final org.apache.commons.logging.Log log = org.apache.commons.logging.LogFactory.getLog("DifferentName")CODE
CRITICAL…t/transform/resource/after-delombok/LoggerCommons.java19 private static final org.apache.commons.logging.Log log = org.apache.commons.logging.LogFactory.getLog(LoggerCommonsWitCODE
CRITICAL…sform/resource/after-delombok/LoggerFloggerRecord.java6 private static final com.google.common.flogger.FluentLogger log = com.google.common.flogger.FluentLogger.forEnclosingCCODE
CRITICAL…ransform/resource/after-delombok/NonNullWithGuava.java7 com.google.common.base.Preconditions.checkNotNull(arg, "arg is marked non-null but is null");CODE
CRITICAL…ransform/resource/after-delombok/NonNullWithGuava.java17 com.google.common.base.Preconditions.checkNotNull(arg);CODE
CRITICAL…ransform/resource/after-delombok/NonNullWithGuava.java20 com.google.common.base.Preconditions.checkNotNull(arg, "arg is marked non-null but is null");CODE
CRITICAL…ransform/resource/after-delombok/NonNullWithGuava.java24 com.google.common.base.Preconditions.checkNotNull(arg, "arg is marked non-null but is null");CODE
CRITICAL…ransform/resource/after-delombok/NonNullWithGuava.java25 com.google.common.base.Preconditions.checkNotNull(test);CODE
CRITICAL…ransform/resource/after-delombok/NonNullWithGuava.java28 com.google.common.base.Preconditions.checkNotNull(arg, "arg is marked non-null but is null");CODE
CRITICAL…ransform/resource/after-delombok/NonNullWithGuava.java34 com.google.common.base.Preconditions.checkNotNull(test, "test is marked non-null but is null");CODE
CRITICAL…after-delombok/SuperBuilderSingularToBuilderGuava.java45 if (this.cards == null) this.cards = com.google.common.collect.ImmutableList.builder();CODE
CRITICAL…after-delombok/SuperBuilderSingularToBuilderGuava.java55 if (this.cards == null) this.cards = com.google.common.collect.ImmutableList.builder();CODE
CRITICAL…after-delombok/SuperBuilderSingularToBuilderGuava.java68 if (this.frogs == null) this.frogs = com.google.common.collect.ImmutableList.builder();CODE
CRITICAL…after-delombok/SuperBuilderSingularToBuilderGuava.java78 if (this.frogs == null) this.frogs = com.google.common.collect.ImmutableList.builder();CODE
CRITICAL…after-delombok/SuperBuilderSingularToBuilderGuava.java91 if (this.rawSet == null) this.rawSet = com.google.common.collect.ImmutableSet.builder();CODE
CRITICAL…after-delombok/SuperBuilderSingularToBuilderGuava.java101 if (this.rawSet == null) this.rawSet = com.google.common.collect.ImmutableSet.builder();CODE
CRITICAL…after-delombok/SuperBuilderSingularToBuilderGuava.java114 if (this.passes == null) this.passes = com.google.common.collect.ImmutableSortedSet.naturalOrder();CODE
CRITICAL…after-delombok/SuperBuilderSingularToBuilderGuava.java124 if (this.passes == null) this.passes = com.google.common.collect.ImmutableSortedSet.naturalOrder();CODE
CRITICAL…after-delombok/SuperBuilderSingularToBuilderGuava.java137 if (this.users == null) this.users = com.google.common.collect.ImmutableTable.builder();CODE
CRITICAL…after-delombok/SuperBuilderSingularToBuilderGuava.java147 if (this.users == null) this.users = com.google.common.collect.ImmutableTable.builder();CODE
CRITICAL…t/transform/resource/after-delombok/LoggerFlogger.java4 private static final com.google.common.flogger.FluentLogger log = com.google.common.flogger.FluentLogger.forEnclosingClCODE
CRITICAL…t/transform/resource/after-delombok/LoggerFlogger.java9 private static final com.google.common.flogger.FluentLogger log = com.google.common.flogger.FluentLogger.forEnclosingClCODE
CRITICAL…t/transform/resource/after-delombok/LoggerFlogger.java15 private static final com.google.common.flogger.FluentLogger log = com.google.common.flogger.FluentLogger.forEnclosingCCODE
CRITICAL…t/transform/resource/after-delombok/LoggerFlogger.java22 private static final com.google.common.flogger.FluentLogger log = com.google.common.flogger.FluentLogger.forEnclosingClCODE
CRITICAL…t/transform/resource/after-delombok/LoggerFlogger.java29 private static final com.google.common.flogger.FluentLogger log = com.google.common.flogger.FluentLogger.forEnclosingCCODE
CRITICAL…rce/after-delombok/BuilderSingularRedirectToGuava.java34 if (this.dangerMice == null) this.dangerMice = com.google.common.collect.ImmutableSet.builder();CODE
CRITICAL…rce/after-delombok/BuilderSingularRedirectToGuava.java44 if (this.dangerMice == null) this.dangerMice = com.google.common.collect.ImmutableSet.builder();CODE
CRITICAL…rce/after-delombok/BuilderSingularRedirectToGuava.java57 if (this.things == null) this.things = com.google.common.collect.ImmutableSortedMap.naturalOrder();CODE
CRITICAL…rce/after-delombok/BuilderSingularRedirectToGuava.java67 if (this.things == null) this.things = com.google.common.collect.ImmutableSortedMap.naturalOrder();CODE
CRITICAL…rce/after-delombok/BuilderSingularRedirectToGuava.java80 if (this.doohickeys == null) this.doohickeys = com.google.common.collect.ImmutableList.builder();CODE
CRITICAL…rce/after-delombok/BuilderSingularRedirectToGuava.java90 if (this.doohickeys == null) this.doohickeys = com.google.common.collect.ImmutableList.builder();CODE
CRITICAL…esource/after-delombok/JacksonizedBuilderSingular.java8@com.fasterxml.jackson.databind.annotation.JsonDeserialize(builder = JacksonizedBuilderSingular.JacksonizedBuilderSingulCODE
CRITICAL…esource/after-delombok/JacksonizedBuilderSingular.java29 @com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder(withPrefix = "", buildMethodName = "build")CODE
CRITICAL…esource/after-delombok/JacksonizedBuilderSingular.java116 if (this.guavaAny == null) this.guavaAny = com.google.common.collect.ImmutableMap.builder();CODE
CRITICAL…esource/after-delombok/JacksonizedBuilderSingular.java126 if (this.guavaAny == null) this.guavaAny = com.google.common.collect.ImmutableMap.builder();CODE
CRITICAL…esource/after-delombok/JacksonizedBuilderSingular.java139 if (this.guavaValues == null) this.guavaValues = com.google.common.collect.ImmutableList.builder();CODE
CRITICAL…esource/after-delombok/JacksonizedBuilderSingular.java150 if (this.guavaValues == null) this.guavaValues = com.google.common.collect.ImmutableList.builder();CODE
CRITICAL…resource/after-delombok/JacksonizedNoConfigChoice.java1@com.fasterxml.jackson.databind.annotation.JsonDeserialize(builder = JacksonizedNoConfigChoice.JacksonizedNoConfigChoiceCODE
CRITICAL…resource/after-delombok/JacksonizedNoConfigChoice.java11 @com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder(withPrefix = "", buildMethodName = "build")CODE
CRITICAL…urce/after-delombok/JacksonizedSuperBuilderSimple.java4 @com.fasterxml.jackson.databind.annotation.JsonDeserialize(builder = JacksonizedSuperBuilderSimple.Parent.ParentBuilderCODE
CRITICAL…urce/after-delombok/JacksonizedSuperBuilderSimple.java39 @com.fasterxml.jackson.databind.annotation.JsonPOJOBuilder(withPrefix = "", buildMethodName = "build")CODE
CRITICAL…resource/after-delombok/JacksonizedBuilderComplex.java4@com.fasterxml.jackson.databind.annotation.JsonDeserialize(builder = JacksonizedBuilderComplex.TestVoidName.class)CODE
159 more matches not shown…
Over-Commented Block17 hits · 17 pts
SeverityFileLineSnippetContext
LOWtest/configuration/resource/configurationRoot/out.txt61lombok.accessors.prefix += m_COMMENT
LOWtest/configuration/resource/configurationRoot/out.txt81# 4: lombok.addGeneratedAnnotation = trueCOMMENT
LOW…rm/resource/before/FieldDefaultsViaConfigOnRecord.java1// version 14:COMMENT
LOWsrc/core/lombok/eclipse/EclipseAST.java101 COMMENT
LOWsrc/core/lombok/eclipse/EclipseAST.java141 }COMMENT
LOWsrc/core/lombok/eclipse/EclipseAST.java161// in.close();COMMENT
LOW…ore/lombok/eclipse/handlers/SetGeneratedByVisitor.java941// public boolean visit(LambdaExpression node, BlockScope scope){ return true;}COMMENT
LOW…c/core/lombok/eclipse/handlers/HandleSneakyThrows.java121// return handleField(annotationNode, (FieldDeclaration)owner.get(), exceptions);COMMENT
LOW…c/core/lombok/eclipse/handlers/HandleSneakyThrows.java141// for (DeclaredException exception : exceptions) {COMMENT
LOWsrc/core/lombok/core/handlers/HandlerUtil.java421 "org.checkerframework.common.value.qual.MinLen",COMMENT
LOWsrc/utils/lombok/javac/JavacTreeMaker.java841// private static final MethodId<JCTypeUnion> TypeUnion = MethodId("TypeUnion");COMMENT
LOW…ombok/javac/java8/CommentCollectingScannerFactory.java41 // the lower bound for T, as a synthetic accessor for the make with returntype ScannerFactory) for that make method wCOMMENT
LOW…ombok/javac/java6/CommentCollectingScannerFactory.java41 //COMMENT
LOW…ombok/javac/java7/CommentCollectingScannerFactory.java41 // is actually on the classpath (either make() for javac6-, or make(Context) for javac7+).COMMENT
LOW…c/eclipseAgent/lombok/eclipse/agent/PatchDelegate.java401// if (ref.resolvedType != null) {COMMENT
LOW…c/eclipseAgent/lombok/eclipse/agent/PatchDelegate.java421// char[] name = md.selector;COMMENT
LOW…c/eclipseAgent/lombok/eclipse/agent/PatchDelegate.java441// }COMMENT
AI Slop Vocabulary4 hits · 8 pts
SeverityFileLineSnippetContext
MEDIUM…c/core/lombok/eclipse/handlers/EclipseHandlerUtil.java1461 if (ann.getInstance().value() == AccessLevel.NONE) return null; //Definitely WONT have a getter.CODE
MEDIUM…c/core/lombok/eclipse/handlers/EclipseHandlerUtil.java1476 if (ann.getInstance().value() == AccessLevel.NONE) return null; //Definitely WONT have a getter.CODE
MEDIUMsrc/core/lombok/javac/handlers/JavacHandlerUtil.java1050 if (ann.getInstance().value() == AccessLevel.NONE) return null; //Definitely WONT have a getter.CODE
MEDIUMsrc/core/lombok/javac/handlers/JavacHandlerUtil.java1065 if (ann.getInstance().value() == AccessLevel.NONE) return null; //Definitely WONT have a getter.CODE
Verbosity Indicators4 hits · 8 pts
SeverityFileLineSnippetContext
LOWsrc/core/lombok/javac/apt/LombokProcessor.java326 // Step 1: Take all CUs which aren't already in the map. Give them the first priority level.COMMENT
LOWsrc/core/lombok/javac/apt/LombokProcessor.java336 // Step 2: For all CUs (in the map, not the roundEnv!), run them across all handlers at their current prio level.COMMENT
LOWsrc/core/lombok/javac/apt/LombokProcessor.java348 // Step 3: Push up all CUs to the next level. Set level to null if there is no next level.COMMENT
LOWsrc/core/lombok/javac/apt/LombokProcessor.java367 // Step 4: If ALL values are null, quit. Else, either do another loop right now or force a resolution reset by forcinCOMMENT
Structural Annotation Overuse4 hits · 8 pts
SeverityFileLineSnippetContext
LOWsrc/core/lombok/javac/apt/LombokProcessor.java326 // Step 1: Take all CUs which aren't already in the map. Give them the first priority level.COMMENT
LOWsrc/core/lombok/javac/apt/LombokProcessor.java336 // Step 2: For all CUs (in the map, not the roundEnv!), run them across all handlers at their current prio level.COMMENT
LOWsrc/core/lombok/javac/apt/LombokProcessor.java348 // Step 3: Push up all CUs to the next level. Set level to null if there is no next level.COMMENT
LOWsrc/core/lombok/javac/apt/LombokProcessor.java367 // Step 4: If ALL values are null, quit. Else, either do another loop right now or force a resolution reset by forcinCOMMENT
Modern AI Meta-Vocabulary3 hits · 6 pts
SeverityFileLineSnippetContext
MEDIUMwebsite/templates/_scaffold.html34<#macro scaffold load=[] title='Project Lombok'>CODE
MEDIUMwebsite/templates/features/_features.html66<#macro scaffold title logline load=[]>CODE
MEDIUMwebsite/templates/setup/_setup.html17<#macro scaffold title load=[]>CODE
Slop Phrases2 hits · 2 pts
SeverityFileLineSnippetContext
LOWwebsite/templates/contributing/contributing.html30 To create new features and add them to project lombok itself, send us pull requests via github. However, before you CODE
LOWsrc/installer/lombok/installer/InstallerGUI.java941 "Don't forget to:<ul><li> add <code>lombok.jar</code> to your projects,<li><b>exit and start</b> your IDE,<li><b>rebuCODE
Hyper-Verbose Identifiers1 hit · 1 pts
SeverityFileLineSnippetContext
LOWwebsite/resources/js/main.js36 function aButtonsRespondToSpacebar() {CODE