Repository Analysis

microsoft/calculator

Windows Calculator: A simple yet powerful calculator that ships with Windows

2.6 Likely human-written View on GitHub

Analysis Overview

This report presents the forensic synthetic code analysis of microsoft/calculator, a C++ project with 30,987 GitHub stars. SynthScan v2.0 examined 68,944 lines of code across 333 source files, recording 161 pattern matches distributed across 6 syntactic categories. The overall adjusted score of 2.6 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).

2.6
Adjusted Score
2.6
Raw Score
100%
Time Factor
2026-07-01
Last Push
31.0K
Stars
C++
Language
68.9K
Lines of Code
333
Files
161
Pattern Hits
2026-07-14
Scan Date
0.01
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

This chart maps the temporal evolution of the adjusted synthetic code score across successive scan runs. An upward trajectory indicates ongoing incorporation of AI-generated code or expanding LLM-assisted scaffolding; a stable or declining trajectory may reflect active human refactoring, code removal, or the adoption of stricter authorship policies. The dashed secondary line (right axis) independently tracks total raw pattern hit count, which can diverge from the normalised score when codebase size changes significantly between scans.

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 2HIGH 0MEDIUM 0LOW 159

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 161 distinct pattern matches across 6 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 Block152 hits · 151 pts
SeverityFileLineSnippetContext
LOWsrc/GraphControl/pch.h1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/GraphControl/pch.h21#include <string>COMMENT
LOWsrc/GraphControl/Control/Grapher.h1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/Calculator/DesignData/DesignAppViewModel.h1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOW…c/Calculator/DesignData/DesignUnitConverterViewModel.h1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/CalcViewModel/pch.h1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/CalcViewModel/pch.h21#include <vector>COMMENT
LOWsrc/CalcViewModel/pch.h41#include "winrt/Windows.System.UserProfile.h"COMMENT
LOWsrc/CalcViewModel/StandardCalculatorViewModel.h1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/CalcViewModel/UnitConverterViewModel.cpp1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/CalcViewModel/DataLoaders/CurrencyDataLoader.cpp1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/CalcViewModel/Common/Utils.cpp1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/CalcViewModel/Common/RadixType.cpp1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/CalcViewModel/Common/Automation/LiveRegionHost.h1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/TraceLogging/pch.h1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/TraceLogging/pch.cpp1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/GraphingImpl/pch.h1#pragma onceCOMMENT
LOWsrc/CalculatorUITests/StandardModeFunctionalTests.cs221 /// To-do:COMMENT
LOWsrc/CalculatorUITests/StandardModeFunctionalTests.cs641 Assert.AreEqual("0", page.CalculatorResults.GetCalculatorResultText());COMMENT
LOWsrc/CalcManager/UnitConverter.cpp161COMMENT
LOWsrc/CalcManager/sal_cross_platform.h1#pragma onceCOMMENT
LOWsrc/CalcManager/pch.h1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/CalcManager/pch.h21#include <vector>COMMENT
LOWsrc/CalcManager/winerror_cross_platform.h1#pragma onceCOMMENT
LOWsrc/CalcManager/winerror_cross_platform.h21#define SUCCEEDED(hr) (((ResultCode)(hr)) >= 0)COMMENT
LOWsrc/CalcManager/pch.cpp1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/CalcManager/CEngine/calc.cpp41//////////////////////////////////////////////////COMMENT
LOWsrc/CalcManager/CEngine/sciset.cpp121 // find the largest digitCOMMENT
LOWsrc/CalcManager/Header Files/History.h1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/CalcManager/Header Files/CalcEngine.h21#include "../ExpressionCommand.h"COMMENT
LOWsrc/CalcManager/Header Files/CCommand.h21#define IDM_DEC 314COMMENT
LOWsrc/CalcManager/Header Files/CCommand.h41#define IDC_DEGREES IDM_DEGREESCOMMENT
LOWsrc/CalcManager/Header Files/CCommand.h61COMMENT
LOWsrc/CalcManager/Header Files/CCommand.h81#define IDC_ROL 99COMMENT
LOWsrc/CalcManager/Header Files/CCommand.h101#define IDC_CUBEROOT 116 // x ^ 1/3COMMENT
LOWsrc/CalcManager/Header Files/CCommand.h121#define IDC_0 130 // The controls for 0 through F must be consecutive and in orderCOMMENT
LOWsrc/CalcManager/Header Files/CCommand.h141#define IDC_UNARYEXTENDEDFIRST IDC_STRING_MAPPED_VALUESCOMMENT
LOWsrc/CalcManager/Header Files/CCommand.h161#define IDC_ROLC 416 // Rotate Left CircularCOMMENT
LOWsrc/CalcManager/Header Files/CCommand.h181#define IDC_BINPOS1 701COMMENT
LOWsrc/CalcManager/Header Files/CCommand.h201#define IDC_BINPOS21 721COMMENT
LOWsrc/CalcManager/Header Files/CCommand.h221#define IDC_BINPOS41 741COMMENT
LOWsrc/CalcManager/Header Files/CCommand.h241#define IDC_BINPOS61 761COMMENT
LOWsrc/CalcManager/Ratpack/num.cpp1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/CalcManager/Ratpack/num.cpp21#include <cstring> // for memmoveCOMMENT
LOWsrc/CalcManager/Ratpack/num.cpp161 // Remove leading zeros, remember digits are in order ofCOMMENT
LOWsrc/CalcManager/Ratpack/num.cpp281 {COMMENT
LOWsrc/CalcManager/Ratpack/num.cpp341COMMENT
LOWsrc/CalcManager/Ratpack/num.cpp541}COMMENT
LOWsrc/CalcManager/Ratpack/num.cpp581 if (diff)COMMENT
LOWsrc/CalcManager/Ratpack/logic.cpp1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/CalcManager/Ratpack/exp.cpp1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/CalcManager/Ratpack/exp.cpp21// FUNCTION: expratCOMMENT
LOWsrc/CalcManager/Ratpack/exp.cpp101//COMMENT
LOWsrc/CalcManager/Ratpack/exp.cpp261 return bRet;COMMENT
LOWsrc/CalcManager/Ratpack/exp.cpp401//COMMENT
LOWsrc/CalcManager/Ratpack/itrans.cpp1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
LOWsrc/CalcManager/Ratpack/itrans.cpp41// ARGUMENTS: x PRAT representation of number to take the inverseCOMMENT
LOWsrc/CalcManager/Ratpack/itrans.cpp141//-----------------------------------------------------------------------------COMMENT
LOWsrc/CalcManager/Ratpack/itrans.cpp221//-----------------------------------------------------------------------------COMMENT
LOWsrc/CalcManager/Ratpack/CalcErr.h1// Copyright (c) Microsoft Corporation. All rights reserved.COMMENT
92 more matches not shown…
Hallucination Indicators2 hits · 20 pts
SeverityFileLineSnippetContext
CRITICAL…or/Views/GraphingCalculator/GraphingCalculator.xaml.cs707 var compositor = Windows.UI.Xaml.Hosting.ElementCompositionPreview.GetElementVisual(CursorPath).Compositor;CODE
CRITICAL…or/Views/GraphingCalculator/GraphingCalculator.xaml.cs717 Windows.UI.Xaml.Hosting.ElementCompositionPreview.SetElementChildVisual(CursorShadow, shadowSpriteVisual);CODE
Structural Annotation Overuse4 hits · 6 pts
SeverityFileLineSnippetContext
LOWdocs/NewFeatureProcess.md24## Step 1: Feature pitchCOMMENT
LOWdocs/NewFeatureProcess.md34## Step 2: PlanningCOMMENT
LOWdocs/NewFeatureProcess.md51## Step 3: ImplementationCOMMENT
LOWdocs/NewFeatureProcess.md111## Step 4: Final product review and merge to masterCOMMENT
AI Slop Vocabulary1 hit · 2 pts
SeverityFileLineSnippetContext
LOWTools/Scripts/clang-format/clang-format-all.sh11# Some distros just call it clang-format. Others (e.g. Ubuntu) are insistentCOMMENT
Redundant / Tautological Comments1 hit · 2 pts
SeverityFileLineSnippetContext
LOWTools/Scripts/clang-format/clang-format-all.sh22# Check if we found a working clang-formatCOMMENT
Slop Phrases1 hit · 2 pts
SeverityFileLineSnippetContext
LOWsrc/GraphControl/DirectX/DeviceResources.cpp152 // Don't forget to declare your application's minimum required feature level in itsCOMMENT