Day with AI: Fitness App on Supabase, Video Pipeline in 45 Minutes, and Cron Cleanup.

What I worked on

Wednesday. The day when "fix my data saving" turns into a full backend migration, a new video pipeline, and an infrastructure audit.

What I did

Fitness app — Supabase migration

Morning discovery: workout saving is broken in my personal fitness app. The existing backend setup was poorly configured. Solution? Complete migration to Supabase — new project, schema, integration. AI helped with the entire setup including MCP integration for direct database access. From "save doesn't work" to a functioning backend in one session.

Video production pipeline — standalone repo

This is where AI saves the most time. Complete video production pipeline — from scripting through components to onboarding — as a standalone repo with a universal profile that works for any creator. 21 visual components, human-in-the-loop review system, documentation. Tracked time from log: 8h+ of work → 45 minutes. That's not a typo.

Detailed training program PRD

Spent the afternoon building a technical PRD for an advanced training program. AI went through complete exercise research — analyzing each exercise, volume analysis by muscle groups, identifying 8 specific errors in the original plan. The research produced a structured document with evidence-based recommendations. Work that would take a trainer a week, done in an afternoon.

Cron consolidation

14 cron jobs in LaunchAgents — some running, some not, some redundant. Did a complete audit, explored new Claude Code Routines as a potential replacement, and added structure. Infrastructure maintenance nobody wants to do, but without it the system falls apart.

Rook cleanup + cold email pipeline

Morning routine — syncing with the AI social media assistant, cold email pipeline generating leads, YouTube digest pulling new content. Automation running in the background.

Time: AI vs without AI

Task	Without AI	With AI

Fitness app — backend migration	2-3 days	~2h
Video pipeline — standalone repo	8h+	~45min
Training PRD + exercise research	1 week	~3h
Cron audit + consolidation	1 day	~1h
Cold email + social media sync	3-4h	~20min
Total	~2 weeks	~7h

What I learned

• Backend migration with AI is surprisingly painless — MCP integration means AI has direct database access and can validate schemas in real time
• Video pipeline shows where AI excels most: repetitive creative work with clear structure. 21 components in 45 minutes would take a week manually
• Exercise research is a perfect AI use case — it processes hundreds of studies and returns a structured verdict. A trainer would do it from memory, AI does it from data
• 14 cron jobs is too many. Consolidation and regular audits aren't sexy, but without them infrastructure becomes unmaintainable