AI Writing Detection

WriteTrack is a client-side JavaScript SDK for developers adding AI-writing detection to their own applications. It records typing, pastes, revisions, dictation, autocomplete, pauses, cursor movement and programmatic changes as they happen inside the editor.

The output is a session report your product can store, query and show to a reviewer.

Why analyse the writing process?

Text-only AI detectors analyse completed prose; copying, rewriting, translation and editing erase the record of how text entered the document.

WriteTrack collects that record at the point of entry. Reviewers can compare a paragraph developed over twenty minutes with one added in a single paste, autocomplete event, dictation event or mechanically regular input sequence. Capture and analysis run locally in the browser.

The seven analysis dimensions

getAnalysis() examines a captured session across seven dimensions. Each covers one part of the session and should be read alongside the others.

Dimension	What it measures
Content origin	The share of text typed, pasted, dictated, autocompleted, or inserted without a known origin; individual paste events and subsequent rework.
Timing authenticity	Key hold and inter-key timing, rhythm variability, periodicity, and entropy.
Revision behaviour	Corrections, navigation, word substitutions, revision depth, and editing behind the forward edge of the document.
Session continuity	Tab-away periods and meaningful changes in behaviour during the session.
Physical plausibility	Event sequences that are too fast, incomplete, untrusted, or otherwise inconsistent with a physical keyboard.
Temporal patterns	Pauses, bursts, speed changes, fatigue, warm-up, and active versus idle time.
Writing process	How the session moves between planning, drafting, and revision phases.

The Analysis Reference documents every field and the Analysis guide explains the indicator codes and usage patterns.

Add it to a submission flow

Install WriteTrack and attach it to the field or editor your user writes in:

npm install writetrack

import { WriteTrack, summarizeAnalysis } from 'writetrack';

const tracker = new WriteTrack({
  target: document.querySelector<HTMLTextAreaElement>('#essay')!,
});

tracker.start();

async function finishSubmission() {
  tracker.stop();
  const report = await tracker.getSessionReport();

  if (!report.analysis) {
    throw new Error('Writing-process analysis is unavailable');
  }

  const summary = summarizeAnalysis(report.analysis);

  await fetch('/api/submissions', {
    method: 'POST',
    headers: { 'Content-Type': 'application/json' },
    body: JSON.stringify({ report, summary }),
  });
}

summary contains stable fields for list views, queries, and thresholds, including effort ratio, typed and pasted percentages, largest paste, corrections, tab-aways, and active writing time. Keep the complete report for reviewers who need the underlying timeline and indicators. See Storing & Querying Reports for database schemas and indexing patterns.

Data flow

Capture and analysis run in the browser. Network requests occur through output sinks you configure. Raw session data can contain the text that was typed or pasted, so your application still needs an appropriate consent, retention and access policy. The Privacy & Security guide lists every captured field and the content-bearing fields to treat as sensitive.

Quick Start Capture a session and read the headline numbers

Analysis Understand the indicators and category output

Analysis Reference Inspect every field in SessionAnalysis