Check whether AI feedback quotes your student exactly, with one offline HTML file

Description and use

The "quote-check" tool verifies whether AI feedback quotes match the student’s exact words, operating offline and matching a Python reference implementation.

Problem

Teachers need to verify that AI-generated feedback quotes students’ exact words, avoiding inadvertent corrections or misattributions.

Outcome

The tool matches the Python checker on 4,160 synthetic test cases, providing identical verdicts and similarity scores, and operates entirely offline, preserving student text privacy.

Workflow

• Download quote-check.html from GitHub
• Open the file in a browser with Wi‑Fi off
• Paste the student’s text into the first box
• Paste the AI feedback into the second box
• Click "Check quotes"
• Review the verdicts for each quoted passage

Evidence

The page loads nothing and sends nothing. Its Content‑Security‑Policy is default‑src 'none', so the browser itself blocks every network request

Source

The verdict, the similarity score (bit for bit) and the word splitting matched in every case. No real student text was used for the test.

Source