imjusthoward

README.md



Howard Chan
Builder. I ship small, opinionated tools that take one problem seriously and refuse to lie to you about it.
Themes that show up across what I work on:

Honest measurement. Backtests that don't peek at the future. Arbitrage spreads computed after fees, shipping, duty, and FX — not before.
Disciplined automation. Cron + LLMs as separate layers. Plumbing is plumbing. Models reason on top.
Small, typed, testable. TypeScript / Python with strict types, leak-resistant tests, and modules small enough to explain on a whiteboard.

Featured


Project
What it does


claude-flywheel
4-layer self-improvement loop for Claude Code. Hooks log every tool call; weekly LLM reflection writes durable instincts the next session inherits.


quant-pipeline
Research framework for prediction markets: 7-stage typed pipeline, walk-forward backtesting, property-based leak guards. Ships no edges — closes off the common ways to fool yourself.


prediction-market-edge
Aggregates Polymarket + Kalshi. Surfaces cross-venue arbitrage and thin-market mispricing. Zero runtime dependencies.


Card-Reselling-Optimization
Bayesian-calibrated scoring engine for Japan trading card arbitrage. Live Mercari / Yahoo scans, trader-feedback calibration, fee-aware spread modeling.


tcg-arb-scanner
Cross-border trading card arbitrage scanner — JP / US / EU marketplaces, net-of-everything spreads.


HireVue-Preparation
Next.js + Prisma interview prep with a deterministic AI scoring pipeline and OpenAI-backed evaluation worker.


Stack
TypeScript · Bun · Next.js · Prisma · Python · pandas · numpy · pytest · Postgres · Vercel · GitHub Actions
Mirrors
Every repo is mirrored to two additional forges so the work survives single-host outages or suspensions:

Codeberg — codeberg.org/imjusthoward
GitLab — gitlab.com/howard53

Contact
GitHub · thinkcollegelevel.com