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Stan Chang

Hi — I'm Stan. Welcome in.

I'm a software engineer and a YC founder, building AI-powered tools for how people work. This is where I write essays on architecture, AI engineering, and product building, share what I'm reading, and leave tools out on the bench for anyone to use. Stay a while.

writing/essays, monthly-ish
★ latest · 2026-07-05 · 7 min readThe Great Token ArbitrageA look at the emerging pricing gap between AI subscriptions and model APIs, and what it could mean for AI SaaS companies.2026-06-24User Experience Is No Longer Just for Users2026-06-19Beyond RAG: Agentic Context Construction2026-01-15Announcing @taskade/temporal-parser
all 20 essaysbrowse →
reading/links + my take, weekly
2–3 links a weekfull log →

▚ Workbench

all tools →

Free tools and playgrounds, born from real problems. Use them here, or embed any of them on your own site.

Singapore Mortgage Calculator
#finance #singapore

Singapore Mortgage Calculator

Monthly payments, TDSR limits, promo rates, scenario compare.

Progressive Payment Calculator
#finance #new-launch

Progressive Payment Calculator

Stage-by-stage schedules for SG new launch properties.

Temporal Expression Playground
#parser #iso-8601

Temporal Expression Playground

Parse ISO 8601 / RFC 3339 live, with color-coded lexer output.

every tool is embeddable — one iframe snippet, free, no tracking.browse embeds →