Articles by jjmaxwell4
360

Things to know when you get cancer – 2026 Edition (jjmaxwell4.com)

1

Doorstep: An MCP server that lets Claude send someone in SF to run your errands (trydoorstep.app)

5

Show HN: Agent Readiness Score – A real AI agent to test your website (trypillar.com)

4

Lessons from Building (and Closing) Double Finance (YC W24) (jjmaxwell4.com)

5

We Shut Down Double Finance (YC W24) (jjmaxwell4.com)

1

We Shut Down Double Finance (YC W24) (yourdomain.com)

1

We Shut Down Double Finance (YC W24) (bedpage.com)

303

Google Antigravity exfiltrates data via indirect prompt injection attack (promptarmor.com)

2

$93B paid in Expense Ratios per year (double.finance)

4

Default/Override: An Elegant Schema for User Settings (double.finance)

2

Default/Override: An Elegant Schema for User Settings (double.finance)

13

Show HN: ETF Comparison – See Correlation, Overlap, and Holdings

212

Launch HN: Double (YC W24) – Index Investing with 0% Expense Ratios

59

Show HN: Double – Design and invest in your own stock index