Gisa-Gy/AI-Powered-Code-Plagiarism-Detection-Platform

CodeGuard AI is a single-file web application that demonstrates an AST-based structural similarity detector with a separate AI-assisted scoring layer for detecting plagiarism in programming assignments. It is a final-year Computer Science research prototype built for an academic (University of Kigali / Rwanda) context. # CodeGuard AI **AI-Powered Code Plagiarism Detection Platform** CodeGuard AI is a single-file web application that demonstrates an AST-based structural similarity detector with a separate AI-assisted scoring layer for detecting plagiarism in programming assignments. It is a final-year Computer Science research prototype built for an academic (University of Kigali / Rwanda) context. > **Prototype notice.** This is a browser-only demonstration. All data, scores, and metrics are labelled *Demo / Illustrative* — no real research findings are fabricated. The AI layer is a *supporting* signal only: it never decides academic misconduct. A human lecturer always makes the final decision (human-in-the-loop). --- ## Features - **Role-based access control** — three roles (System Administrator, Lecturer, Student) with enforced permissions - **12-stage animated analysis pipeline** — Submission → Language ID → Preprocess → Normalize → AST Generation → AST Normalization → Feature Extraction → Structural Similarity → AI Scoring → Classification → Evidence → Human Review - **AST-based structural analysis** kept architecturally separate from the AI-assisted score - Interactive **SVG AST viewer** (zoom, collapse, compare-highlight) - **Split-screen code comparison** with line-match highlighting - Plagiarism **case management** and review workflow - Printable / exportable **reports** (JSON + CSV) - Admin tools: user management, roles & permissions, departments, courses, database + ERD, security center, audit logs, system monitoring - Configurable scoring weights (AST 60% / Token 20% / AI 20%) - Evaluation dashboard with a confusion matrix (labelled *Demo*) - Global search (Ctrl+K), notifications, dark mode, native SVG charts - Guided **presentation / demo mode** --- ## Running it ### Option A — Open directly Download or clone the repo and open `index.html` in any modern browser (Chrome, Edge, or Firefox). No server, build step, or installation is required. ### Option B — Dep …