Ask HN: What was the hardest bug you tracked down in 2025?

5 pointsposted 12 hours ago
by varshith17

Item id: 46399339

2 Comments

Agent_Builder

12 hours ago

While building GTWY, we realized stack traces stop being useful once workflows go async. So we designed things around step-level visibility and shared context instead.

varshith17

11 hours ago

Async stack traces are a nightmare. You lose the causality chain completely.

We ran into a similar issue with 'Shared Context.' We tried to sync the context between an x86 server and an ARM edge node, but because of the floating-point drift, the 'Context' itself was slightly different on each machine.

Step-level visibility is great, but did you have to implement any strict serialization for that shared context to keep it consistent?