Hal - local RAG AI assistant

Python, Ollama, MCP, NumPy

A privacy-preserving retrieval-augmented assistant that answers strictly from a personal Obsidian knowledge base and runs entirely offline on one consumer GPU. Built from first principles: heading-aware chunking, a NumPy vector store with cosine similarity, and incremental re-indexing keyed on content hashes. Answers cite the note each passage came from, or say plainly that the notes do not cover it. Exposes its search over the Model Context Protocol with path-traversal guards, and works around a 32K context window with a three-tier memory system and twelve task-specific commands.

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Probe Request Sniffer - passive Wi-Fi device counting

Python, scapy/pyshark, 802.11

A passive 802.11 sniffer that counts devices through MAC randomisation by fingerprinting the information elements in each frame, so one phone maps to one identity however often it rotates its address. Over fifteen minutes in a real room the clustered count held at about 30 devices while raw address counting climbed past 250. Two capture backends behind one interface, a thread-safe sliding-window tracker with lazy expiry, and a 113-test suite that crafts frames in memory, so it runs with no interface, monitor mode or root.

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Lidar Autonavigation - real-time autonomous control

Lua, A*, control theory, linear algebra

A real-time autopilot that sweeps laser rangefinders into a live obstacle map, plans with an A* search sliced across ticks so it never overruns the 60 Hz budget, and follows the route with speed-scaled pure pursuit. Written inside a hard 4096-character script cap, later raised to 8192, which made every byte a design decision: an octile heuristic for exact 8-connected cost, a clearance penalty that keeps it mid-channel, 3D rotation matrices for attitude compensation, and an O(1) hash-set spatial map.

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Hatch - desktop mood tracker with a roaming creature

Electron, React, TypeScript, SQLite, FastAPI

An Electron desktop pet whose creature leaves the app window and roams the desktop: one position in global screen coordinates, ticked at 30 Hz by the main process and drawn by transparent click-through overlay windows. The simulation engine is pure, so a 30-day life cycle is testable in a loop; persistence is event-sourced SQLite with versioned migrations and a backup taken before each one; and an optional Python AI sidecar sits behind a typed IPC boundary, with context isolation on and the renderer sandboxed.

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Bartender, The Old George Inn

Nov 2024 - May 2025

Served 400+ customers a shift through peak periods as part of a team of five.

Bartender / Supervisor, Bar Malden

May 2024 - Sep 2024

Trained new staff, delegated tasks during service, and held accountability for cashing-up, weekly banking, inventory and audits. Upheld safety and licensing standards, and ran cellar operations including stock, shipments and contractor coordination.