349K lines of code, 343K lines of tests: how a healthcare AI team keeps validation in pace
alex_verem · x · 2026-10-05
A developer shares how their healthcare AI voice-agent system (handling patient billing calls) carries 349,000 lines of application code alongside 343,000 lines of test code — nearly as much code validates as ships features.
- AI-assisted development sped up changes, so validation capacity had to scale too; mistakes can hit patients' money or medical records.
- The suite contains 13,650 automated tests running on every pull request in 9.7 minutes.
- Recorded test durations are used to split the suite across parallel workers, keeping feedback under 10 minutes.
Takeaway: once AI accelerates writing code, the bottleneck shifts to validation — invest in test infrastructure at comparable scale.
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