Quadrant IntegrityLens

Installation

Mon, 01 Jan 0001 00:00:00 +0000

Installation#

Loading latest release information…

Download#Pre-built binaries are available for Linux, Windows, and macOS.

Platform

Download

Linux (amd64)

integritylens-linux-amd64

Windows (amd64)

integritylens-windows-amd64.exe

macOS (Apple Silicon)

integritylens-darwin-arm64

After downloading, make the binary executable (Linux/macOS):

chmod +x integritylens-*

Optionally move it to a directory in your PATH:

sudo mv integritylens-linux-amd64 /usr/local/bin/integritylens

Text Extraction

Mon, 01 Jan 0001 00:00:00 +0000

Text Extraction#

Quadrant IntegrityLens uses a smart extraction strategy that balances speed and accuracy depending on the type of PDF.

Embedded text (fast path)#

Most PDFs created from Word processors have an embedded text layer. Extracting this text is very fast (~0.2 seconds) and produces high-quality results. This is the default path for most student submissions.
Broken text layer detection#

Some PDFs — particularly those generated by LaTeX — have a text layer that contains garbled characters. Quadrant IntegrityLens detects this automatically by checking for specific Unicode indicators (standalone diaeresis characters) that signal a broken text layer. When a broken text layer is detected, Quadrant IntegrityLens falls back to OCR automatically. No manual intervention is needed.

Unicode Characters

Mon, 01 Jan 0001 00:00:00 +0000

Unicode Character Scanners#

These scanners detect special Unicode characters that AI models (ChatGPT, Copilot, etc.) frequently insert into text but that students almost never type manually. They run regardless of the selected language.

Scanner ID	Character	Example	Confidence
`em-dash`	U+2014 — (em dash)	“Text — more text” instead of “Text - more text”	High
`en-dash-word-join`	U+2013 – between letters	“word–joiner” instead of “word-joiner”	High
`smart-quotes`	U+201D " and U+2018 '	“quoted” instead of “quoted”	Medium / Low
`ellipsis`	U+2026 … (horizontal ellipsis)	“and so on…” instead of “and so on…”	Medium
`non-breaking-space`	U+00A0 (non-breaking space)	Invisible — looks like a normal space	Medium
`invisible-space`	U+200B, U+200A, U+2009, U+202F, U+FEFF	Completely invisible zero-width characters	High
`minus-sign`	U+2212 − (minus sign)	“5 − 3” instead of “5 - 3”	Medium

Why these matter#

When students type text in a word processor, they use the standard keyboard characters: hyphens (-), straight quotes ("), three dots (...), and regular spaces. AI models, however, are trained on typographically polished text and tend to output Unicode variants of these characters.

Activation

Mon, 01 Jan 0001 00:00:00 +0000

Activation#

Quadrant IntegrityLens requires a valid license key. After purchasing a license, activate it once on each computer where you use the tool.

Purchasing a license#

Visit the purchase page to buy a license:

Purchase a license

After payment you will receive a license key starting with QIL-.

Activating your license#

Run the activate command#
```
integritylens license activate QIL-XXXX-XXXX-XXXX-XXXX
```
Replace QIL-XXXX-XXXX-XXXX-XXXX with the key you received. The tool contacts the license server, validates the key, and stores it on your computer.

Analysis

Mon, 01 Jan 0001 00:00:00 +0000

Analysis#

After text extraction, Quadrant IntegrityLens parses the document structure and runs scanners concurrently.

Structure parsing#

The extracted Markdown text is parsed to identify page boundaries (from  markers), headings (Markdown headings at any level), and sections (text between headings). This structure allows each finding to be annotated with a precise location: page number, heading, and surrounding section text.
Concurrent scanning#

All enabled scanners run concurrently on the full text. Each scanner is independent and focuses on a specific type of AI indicator. Scanners declare which languages they support — when you set --language, only matching scanners run. Language-independent scanners (Unicode and structural) always run.

German Language

Mon, 01 Jan 0001 00:00:00 +0000

German Language Scanners#

These scanners detect patterns specific to German text and only run when the language is set to deu (the default).

Umlaut digraphs (`german`)#

AI models sometimes replace German umlauts (ä, ö, ü) with ASCII digraphs (ae, oe, ue). This scanner detects such substitutions.

To avoid false positives, Quadrant IntegrityLens uses an allowlist of approximately 4,500 known German words that contain umlauts. A digraph is only flagged if the word (or a compound suffix) has a known umlaut form. This means English loanwords like “poem” or legitimate German words like “Abenteuer” (adventure) are not flagged.

Usage

Mon, 01 Jan 0001 00:00:00 +0000

Usage#

Basic usage#

Analyse a document#

Pass a PDF file as argument:
```
integritylens document.pdf
```
Quadrant IntegrityLens extracts the text, runs all enabled scanners, and displays the findings in the terminal. Each finding shows the scanner that triggered it, a confidence level (Low, Medium, or High), the page number and heading where the passage was found, and a text excerpt showing the flagged content in context.
Generate a PDF report#

Use --report to create a PDF report alongside the terminal output:

Swiss German

Mon, 01 Jan 0001 00:00:00 +0000

Swiss German Scanner#

Eszett detection (`swiss-german`)#

Swiss Standard German never uses the Eszett (ß) — it always uses “ss” instead. For example:

Meaning	Standard German (Germany)	Swiss Standard German
street	Straße	Strasse
big	groß	gross
moreover	außerdem	ausserdem

AI language models are predominantly trained on German text from Germany and therefore produce ß regularly. When a student submission written in Swiss German contains Eszett characters, this is a strong indicator that the text was not written by the student.

Rhetorical Patterns

Mon, 01 Jan 0001 00:00:00 +0000

Rhetorical Pattern Scanners#

These scanners detect rhetorical writing patterns that AI models overuse in German text. They only run when the language is set to deu.

A single occurrence of these patterns is normal in student writing. The scanners only trigger when patterns appear two or more times, and confidence increases with frequency.

Negative parallelism (`negative-parallelism`)#

Detects parallel negation constructions such as “Not only X, but also Y” and “Neither X nor Y”. The scanner matches the German equivalents of these patterns.

Structural Patterns

Mon, 01 Jan 0001 00:00:00 +0000

Structural Pattern Scanners#

These scanners detect formatting patterns and textual artifacts that are characteristic of AI-generated content. They run regardless of the selected language.

Label lists (`label-list`)#

Detects AI-style lists where each item starts with a bold label followed by a description:

Clarity: The text should be easy to understand. Brevity: Keep sentences short. Accuracy: Facts must be verified.

Students writing lists typically use plain bullet points without bold labels.

Quadrant IntegrityLens

Installation

Installation#

macOS (Apple Silicon)

Text Extraction

Text Extraction#

Embedded text (fast path)#

Broken text layer detection#

Unicode Characters

Unicode Character Scanners#

Why these matter#

Activation

Activation#

Purchasing a license#

Activating your license#

Run the activate command#

Analysis

Analysis#

Structure parsing#

Concurrent scanning#

German Language

German Language Scanners#

Umlaut digraphs (german)#

Usage

Usage#

Basic usage#

Analyse a document#

Generate a PDF report#

Swiss German

Swiss German Scanner#

Eszett detection (swiss-german)#

Rhetorical Patterns

Rhetorical Pattern Scanners#

Negative parallelism (negative-parallelism)#

Structural Patterns

Structural Pattern Scanners#

Label lists (label-list)#

Umlaut digraphs (`german`)#

Eszett detection (`swiss-german`)#

Negative parallelism (`negative-parallelism`)#

Label lists (`label-list`)#