A lot of the hardest bugs this year feel like nothing is technically broken, but reality isn’t lining up anymore. Async boundaries, floating-point drift, and ordering guarantees. All places where meaning gets lost once systems get fast, parallel, and distributed. Once state stops being inspectable and replayable, debugging turns into archaeology rather than engineering.
'Debugging turns into archaeology rather than engineering', this is the exact realization that forced me to stop building agents and start building a database kernel.
I spent 6 months chasing 'ghosts' in my backtests that turned out to be floating-point drift between my Mac and the production Linux server. I realized exactly what you said: if state isn't replayable bit-for-bit, it's not engineering.
I actually ended up rewriting HNSW using Q16.16 fixed-point math just to force 'reality to line up' again. It’s painful to lose the raw speed of AVX floats, but getting 'Engineering' back was worth it. check it out(https://github.com/varshith-Git/Valori-Kernel)
