Repository Analysis

ChangemakerStudios/Papercut-SMTP

Papercut SMTP -- The Simple Desktop Email Server

7.2 Low AI signal View on GitHub

Analysis Overview

This report presents the forensic synthetic code analysis of ChangemakerStudios/Papercut-SMTP, a C# project with 3,326 GitHub stars. SynthScan v2.0 examined 68,405 lines of code across 503 source files, recording 470 pattern matches distributed across 7 syntactic categories. The overall adjusted score of 7.2 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).

7.2
Adjusted Score
7.2
Raw Score
100%
Time Factor
2026-08-23
Last Push
3.3K
Stars
C#
Language
68.4K
Lines of Code
503
Files
470
Pattern Hits
2026-08-29
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 2MEDIUM 2LOW 466

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 470 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 Block443 hits · 443 pts
SeverityFileLineSnippetContext
LOWdocker-compose.example.yml41 - papercut-logs-tls:/app/LogsCOMMENT
LOWdocker-compose.example.yml81#COMMENT
LOWdocker-compose.example.yml101# Option 3: Self-signed certificate (development)COMMENT
LOWdocker-compose.example.yml121# - SmtpServer__AllowedIps=192.168.1.100 # Allow single IPCOMMENT
LOWtest/Papercut.Core.Tests/PathTemplateHelperTests.cs1// PapercutCOMMENT
LOWtest/Papercut.Core.Tests/EndpointDefinitionTests.cs1// PapercutCOMMENT
LOW…Papercut.Rules.Tests/ConditionalRuleExtensionsTests.cs1// PapercutCOMMENT
LOW…t/Papercut.Rules.Tests/PeriodicRuleIntegrationTests.cs1// PapercutCOMMENT
LOW…Papercut.Rules.Tests/MailRetentionRuleDispatchTests.cs1// PapercutCOMMENT
LOWtest/Papercut.Rules.Tests/RulesRunnerTests.cs1// PapercutCOMMENT
LOW…Papercut.Message.Tests/MessageRepositoryStaticTests.cs1// PapercutCOMMENT
LOW…ercut.Message.Tests/ReceivedDataMessageHandlerTests.cs1// PapercutCOMMENT
LOWtest/Papercut.Message.Tests/MessageRepositoryTests.cs1// PapercutCOMMENT
LOW…percut.Infrastructure.Smtp.Tests/IPAllowedListTests.cs1// PapercutCOMMENT
LOW…ucture.Smtp.Tests/RateLimiting/SmtpRateLimiterTests.cs1// PapercutCOMMENT
LOW…tructure.Smtp.Tests/RateLimiting/SmtpRateLimitTests.cs1// PapercutCOMMENT
LOWexamples/SmtpSendOptions.cs21 /// <summary>COMMENT
LOWexamples/SmtpClientHelper.cs1// PapercutCOMMENT
LOWexamples/SendEmailWithTls/Program.cs1// PapercutCOMMENT
LOWsrc/Papercut.Message/MessageRepository.cs1// PapercutCOMMENT
LOWsrc/Papercut.Message/MimeMessageLoader.cs1// PapercutCOMMENT
LOWsrc/Papercut.Message/ReceivedDataMessageHandler.cs1// PapercutCOMMENT
LOWsrc/Papercut.Message/MessageWatcher.cs1// PapercutCOMMENT
LOWsrc/Papercut.Message/PapercutMessageModule.cs1// PapercutCOMMENT
LOWsrc/Papercut.Message/IMessageRepository.cs1// PapercutCOMMENT
LOWsrc/Papercut.Message/IMimeMessageLoader.cs1// PapercutCOMMENT
LOWsrc/Papercut.Message/Helpers/MessageHelper.cs1// PapercutCOMMENT
LOWsrc/Papercut.Message/Helpers/HtmlMessageRenderer.cs1// PapercutCOMMENT
LOWsrc/Papercut.Message/Helpers/HtmlMessageRenderer.cs21using MimeKit;COMMENT
LOWsrc/Papercut.Message/Helpers/HtmlMessageRenderer.cs41/// malformed markup cannot smuggle a tag past it.COMMENT
LOW…apercut.Message/Helpers/MimeMessageLoaderExtensions.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Extensions/CollectionExtensions.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Extensions/ObjectExtensions.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Extensions/GeneralExtensions.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Extensions/EnumerableExtensions.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Extensions/FileInfoExtensions.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Extensions/OrderableExtensions.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Properties/AssemblyInfo.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Properties/AssemblyInfo.cs21// Setting ComVisible to false makes the types in this assembly not visible COMMENT
LOWsrc/Papercut.Common/Helper/EnumHelpers.cs1// PapercutCOMMENT
LOW…c/Papercut.Common/Helper/NameValueCollectionHelpers.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Helper/PathHelpers.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Helper/RegexHelpers.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Helper/StringHelpers.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Helper/AssemblyHelper.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Domain/IOrderable.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Domain/IEventHandler.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Domain/IMessage.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Domain/ICommand.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Domain/IMessageBus.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Domain/ICommandHandler.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Domain/IEvent.cs1// PapercutCOMMENT
LOWsrc/Papercut.Common/Domain/ExecutionResult.cs1// PapercutCOMMENT
LOWsrc/Papercut.Service.TrayNotification/GlobalUsings.cs1// PapercutCOMMENT
LOWsrc/Papercut.Service.TrayNotification/Program.cs1// PapercutCOMMENT
LOW…ayNotification/AppLayer/TrayLoggingPathConfigurator.cs1// PapercutCOMMENT
LOW…Notification/AppLayer/NewMessageNotificationService.cs1// PapercutCOMMENT
LOW…ce.TrayNotification/AppLayer/ServiceTrayCoordinator.cs1// PapercutCOMMENT
LOW…on/Infrastructure/PapercutServiceControllerProvider.cs1// PapercutCOMMENT
LOW…tification/Infrastructure/PapercutServiceTrayModule.cs1// PapercutCOMMENT
383 more matches not shown…
Synthetic Comment Markers2 hits · 15 pts
SeverityFileLineSnippetContext
HIGHsrc/Papercut.UI/Properties/UIStrings.Designer.cs3// This code was generated by a tool.COMMENT
HIGHsrc/Papercut.UI/Properties/Settings.Designer.cs3// This code was generated by a tool.COMMENT
Structural Annotation Overuse10 hits · 15 pts
SeverityFileLineSnippetContext
LOWsrc/Papercut.Service/Web/IMPLEMENTATION_PLAN.md23#### Step 1: Extract Pagination Component ✅COMMENT
LOWsrc/Papercut.Service/Web/IMPLEMENTATION_PLAN.md52#### Step 2: Fix Layout & Resizing ✅COMMENT
LOWsrc/Papercut.Service/Web/IMPLEMENTATION_PLAN.md62#### Step 3: Comprehensive Loading States ✅COMMENT
LOWsrc/Papercut.Service/Web/IMPLEMENTATION_PLAN.md89#### Step 4: Background File Downloader ✅COMMENT
LOWsrc/Papercut.Service/Web/IMPLEMENTATION_PLAN.md111#### Step 5: Message Sections Component ✅COMMENT
LOWsrc/Papercut.Service/Web/IMPLEMENTATION_PLAN.md121#### Step 6: Download Button Feedback ✅COMMENT
LOWsrc/Papercut.Service/Web/IMPLEMENTATION_PLAN.md138#### Step 7: Secure Iframe Implementation ✅COMMENT
LOWsrc/Papercut.Service/Web/IMPLEMENTATION_PLAN.md157#### Step 8: Unified Content Formatting ✅COMMENT
LOWsrc/Papercut.Service/Web/IMPLEMENTATION_PLAN.md176#### Step 9: API Endpoint Integration ✅COMMENT
LOWsrc/Papercut.Service/Web/IMPLEMENTATION_PLAN.md186#### Step 10: Smart Section Interaction ✅COMMENT
Fake / Example Data10 hits · 10 pts
SeverityFileLineSnippetContext
LOW…ercut.Message.Tests/ReceivedDataMessageHandlerTests.cs118 var action = async () => await _handler.HandleReceivedAsync(null!, new[] { "test@test.com" });CODE
LOW…ercut.Message.Tests/ReceivedDataMessageHandlerTests.cs125 var messageData = CreateTestMessage("test@test.com");CODE
LOWdocs/send-from-your-app.md18 message.To.Add(MailboxAddress.Parse("user@example.com"));CODE
LOWdocs/send-from-your-app.md32 client.Send("noreply@myapp.local", "user@example.com", "Test", "Hello Papercut!");CODE
LOWdocs/send-from-your-app.md77 to: "user@example.com",CODE
LOWdocs/send-from-your-app.md93 msg["To"] = "user@example.com"CODE
LOWdocs/send-from-your-app.md141 message.setRecipients(Message.RecipientType.TO, InternetAddress.parse("user@example.com"));CODE
LOWexamples/README.md211- **Bogus** - Fake data generation (names, addresses, lorem ipsum)CODE
LOWexamples/SendEmailWithFileLinks/Program.cs53 message.To.Add(new MailboxAddress("Test User", "user@example.com"));CODE
LOWsrc/Papercut.Service/Web/src/app/testing/mock-data.ts9 name: 'John Doe',CODE
AI Slop Vocabulary2 hits · 6 pts
SeverityFileLineSnippetContext
MEDIUM…rc/app/services/content-transformation.service.spec.ts71 // These tests can be added back when we implement a more robust mocking strategyCOMMENT
MEDIUM…rc/app/services/content-transformation.service.spec.ts81 // These tests can be added back when we implement a more robust mocking strategyCOMMENT
Hyper-Verbose Identifiers2 hits · 2 pts
SeverityFileLineSnippetContext
LOWsrc/Papercut.Service/Web/src/app/testing/test-utils.ts35export function createStandaloneTestModule(component: Type<any>) {CODE
LOWsrc/Papercut.Service/Web/src/app/testing/test-utils.ts47export function createMockMessageApiService(): jasmine.SpyObj<MessageApiService> {CODE
Example Usage Blocks1 hit · 2 pts
SeverityFileLineSnippetContext
LOWdocker-compose.example.yml75# Usage:COMMENT