NewsletterUsersFeeds

Derek Castelli

Essays, notes, and links on faith, technology, and agentic design by Derek Castelli.

Sort by:
★ The 48 hour project
March 22nd, 2026•heyderekj.com
I turned 37
March 2nd, 2026•heyderekj.com
Dogfood or die because of AI
February 22nd, 2026•heyderekj.com
Faith apps deserve a wow
February 15th, 2026•heyderekj.com
Making rectangles
January 27th, 2026•heyderekj.com
A tool waits to be used
January 23rd, 2026•heyderekj.com
Be a toolmaker
January 17th, 2026•heyderekj.com
Dear Charlie
September 10th, 2025•heyderekj.com
Change of plans
August 3rd, 2025•heyderekj.com
Why I'm making Harvous
July 26th, 2025•heyderekj.com
I'm not my Dad
July 21st, 2025•heyderekj.com
No response is a response
July 14th, 2025•heyderekj.com
Taking her last name
July 2nd, 2025•heyderekj.com
The Real Glass Castle
June 20th, 2025•heyderekj.com
My Silent Cofounders
April 23rd, 2025•heyderekj.com
To share is to live
April 22nd, 2025•heyderekj.com
A Shifting Season
April 11th, 2025•heyderekj.com
The Family Farm Fire
March 31st, 2025•heyderekj.com
1 year of making Harvous
March 24th, 2025•heyderekj.com
Through the Glass Door
March 21st, 2025•heyderekj.com