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Day N

A development diary — building SaaS products solo with AI. Real decisions, real mistakes, real lessons.

2026-06-05· 9 min readEnterprise AIAI HiringFuture of Work

"AI Engineer" Is a Fake Job Title

A company decides it needs AI, hires an expensive 'AI Engineer,' and stalls at month three. Then it hires someone pricier — and stalls again. The logic of the hire was broken at the root — and the role that actually works has no market label yet, because it can only come from inside.

2026-05-21· 9 min readIvyBloomSecurityAI Governance

Day 9: Your AI Debug Log Isn't Private

A grep over the knowledge vault hit a three-month-old AI session archive containing a full .env dump. The vault syncs to the cloud. The cloud indexes into AI search. A private debug log had become a three-layer attack surface.

2026-04-30· 8 min readJumpOnionInfrastructureAI Engineering

Day 8: The LLM Succeeded. The Platform Killed the Connection.

First production smoke of a new training-plan endpoint. The browser hung for a minute, returned 504, and a manual refresh showed the plan was already there. The LLM finished in 59.3 seconds. The platform's 60-second gateway killed the client first.

2026-04-25· 9 min readJumpOnionProduction IncidentData Safety

Day 7: When AI Deleted 20 Customers' Data (in One SQL Statement)

After hunting down a real production blocker, the AI moved to clean up a stale cache. The SQL nullified three independent caches in one go. 20 rows updated. 7 paying customers' personalized diagnoses and training plans — gone.

2026-04-22· 7 min readJumpOnionUX DesignAI Engineering

Day 6: A Button Name Killed My Algorithm

A month of algorithm tuning hit clean calibration on 11 real videos. Then a parent uploaded one, and the system reported a 1.2-second air time on a jump that physically maxes out at 0.85 seconds. The algorithm was right. The button label was the bug.

2026-04-18· 9 min readSOP FrameworkAI ToolingCompetitive Analysis

Day 5: 89K Stars. I Adopted 3 Ideas. Rejected 3.

An open-source AI agent framework went viral promising self-evolution through genetic mutation. The temptation was full adoption. The structured 5-dimension comparison was cheaper — and gave me 3 patterns to steal and 3 to reject on sight.

2026-04-15· 8 min readJumpOnionAI GovernanceMemory Architecture

Day 4: Memory Is a Wish. Hooks Are the Law.

The anti-pattern was already in memory. The AI loaded it at session start. It walked right into the same bug anyway. Forty minutes from paying-customer report to root cause to deploy — and a deeper finding that rewired how I store rules.

2026-04-14· 8 min readJumpOnionAI EngineeringPost-Mortem

Day 3: When AI Lied About Dead Code (30 Hours of Silent Failures)

My AI partner deleted production code with absolute confidence and labeled it 'dead code, anonymous uploads.' 987 tests passed. The deploy went green. Thirty hours later, a paying customer noticed.

2026-04-13· 7 min readJumpOnionAI EngineeringDebugging

Day 2: 6.47 Seconds of Air Time (The Jump Lasted 0.7)

The first attempt at detecting a figure skating jump measured 6.47 seconds of air time — on a jump that lasted 0.7 seconds. Three failed approaches, then the system rescued itself.

2026-04-08· 6 min readJumpOnionAI Engineering

Day 1: Building a Figure Skating AI — Why I Started

My kids train figure skating 5 days a week. Coaches cost $120/hour and their time is limited. I built an AI that diagnoses jumps in 60 seconds — here's why I started and what the first day looked like.