PostHog's 6th employee just launched his own company. 48 hours later, @yakkomajuri sat down to demo it: Railcode, where teams build secure internal apps and agents directly from Claude Code. This is Solo in Prod, a new series: – One Solo Founders Program startup – Days after launch – Backstory + a live demo 04:16 The one-question test: "Are you holding your team back?" 07:12 When internal tooling IS the product 11:05 The CEO who vibe codes vs. the CTO who wouldn't let him ship 14:21 Finding…