Writing since 2018San Francisco Bay Area
Notes on building things,& the life around it.
I’m Tony, a software engineer in the San Francisco Bay Area. I write practical notes on engineering, AI workflows, experimentation, and the systems I use at work and at home, plus occasional family and travel stories.
01Recent writing
PostEN
My second brain setup
How I set up a private Markdown-first second brain with semantic search, AI agents, raw capture, and quiet automation.
02Tools
All tools Interactive
Personal workflowShareable
Share the tools behind your work.
Create a clear card of the AI tools you actually use, what each one does, and how the pieces fit together.
Create your card
- Start from a familiar workflow template.
- Add the tools and roles that fit your process.
- Copy the card or share a link with your team.
ExperimentationThree stages
A/B testing, end to end.
Plan the bar before launch, read the lift after the run, and review trust before you ship.
Follow the sequence
- Plan: choose a meaningful baseline and MDE.
- Analyze: compare Treatment and Control lift.
- Review: check SRM, OEC, guardrails, and readiness.
OAuthRuns locally
Generate a PKCE verifier pair.
Create a code verifier and S256 code challenge for OAuth 2.0 flows, without sending secrets to a server.
Two values
- Generate a fresh, URL-safe code verifier.
- Derive its SHA-256 code challenge in the browser.
- Copy the challenge into a manual OAuth request.