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Felix-au/README.md

Hi there, I'm Harshit Soni (aka Felix-au) πŸ‘‹

(He/Him)

I am a Systems Programmer, AI Engineer, and Full-Stack Developer passionate about building highly polished, performance-oriented Windows desktop utilities, deep-learning models, and responsive web systems. I specialize in offline-first architectures, local AI deployment, and constraint-based algorithms.


πŸ“ Featured Creations

πŸ€– Local AI & Intelligent Systems

Voice-controlled Windows desktop assistant running entirely offline.

  • Features: Push-to-talk hotkeys, window processes manager, neural speech responses, interaction logging.
  • Tech Stack: Python, PySide6 (Qt), Faster-Whisper (STT), llama.cpp (Qwen3-4B-GGUF), Piper Neural TTS, SQLite.
  • Highlights: CPU-first by design (runs on low-end hardware, supports GPU offload), built-in intent cache with SequenceMatcher to execute repeated commands instantly.

Deep-learning-powered crowd estimation system countering Western data bias.

  • Features: High-accuracy density estimation + interactive canvas-based crowd flow simulator.
  • Tech Stack: CSRNet (PyTorch), FastAPI, Vite + Canvas, Google Colab (T4 training).
  • Highlights: Outperforms original CSRNet paper benchmarks on ShanghaiTech (Part A: 63.31 vs 68.2 MAE | Part B: 8.37 vs 10.6 MAE) by fine-tuning on a custom-curated Indian crowd dataset (Part C).

AI-powered code debugger & explainer listening directly to your clipboard.

  • Features: Float-on-top interactive widget, instant clipboard trigger, QLoRA fine-tuned explanation.
  • Tech Stack: Python, PySide6, Jupyter Notebook, Qwen2.5-Coder-1.5B (local fine-tuned), Gemini Flash API fallback.

πŸ–±οΈ Mouse Remapper

Utility to remap up to 5 mouse buttons to keyboard keys with repeat modes.

  • Features: Toggle-repeat, modifiers, custom presets, lightweight background daemon.
  • Tech Stack: Qt (QML + C++).

πŸ–₯️ Windows Utilities & Systems Development

πŸ–₯️ DeskX: Wallpaper Engine

Interactive desktop wallpaper manager supporting multi-monitor configurations.

  • Features: Set images, GIFs, videos, and live HTML pages as active wallpapers; 3-layer widget overlays, drag-and-drop widget arrangement, click-through toggles.
  • Tech Stack: JavaScript (Electron), HTML/CSS, Win32 Koffi FFI (Z-order/Z-index control).

πŸŽ›οΈ Sonixx

High-performance virtual audio router and mixer for Windows.

  • Features: Captures individual application audio channels and physical microphones, mixes them, and routes output to virtual devices.
  • Tech Stack: Python, PySide6, WASAPI, Pycaw (Windows Core Audio API wrapper).

🌐 Full-Stack & Algorithmic Applications

Modern, glassmorphic client portal and real-time CMS dashboard.

  • Features: Interactive room configurations, booking logs, image uploader (ImgBB integration), WhatsApp pre-filled bookings, rolling testimonials.
  • Tech Stack: React (Vite), Node.js + Express, MongoDB Atlas, Tailwind CSS + Framer Motion.

Constraint-aware academic timetabling tool.

  • Features: Solves room, faculty, section, and course collisions in < 5 seconds; offline-first design.
  • Tech Stack: React 19, Vite 8, Greedy Constraint Satisfaction (CSP) algorithm.

Step-by-step automata conversion visualizer.

  • Features: Interactive nodes/transitions, subset construction walkthrough, animated graph canvas.
  • Tech Stack: Vite, HTML Canvas, JavaScript.

🎬 flix-app

A movie streaming website with a Netflix-inspired theme.

  • Features: Dynamic video listing, dark theme, interactive media players.
  • Tech Stack: Node.js, Express, EJS, CSS.

πŸ› οΈ Skills & Toolkit

πŸ’» Languages & Frameworks

πŸ€– AI, Deep Learning & Systems

  • Local Inference Engines: llama.cpp (GGUF model load/execution), Faster-Whisper (STT), Piper TTS (ONNX Neural Speech)
  • Windows Core & FFI: WASAPI (virtual routing), Win32 Koffi FFI (Window layout layers, click-through hook)
  • Algorithms: Constraint Satisfaction Problem (Greedy CSP solvers), Automata subset constructions, Graph visualizer rendering.

πŸ“Š GitHub Analytics

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