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[ARTICLE · art-18905] src=news.ycombinator.com pub= topic=ai-agents verified=true sentiment=· neutral

Ask HN: What were your worst war stories bringing agentic applications into prod

A developer building a team of AI agents to generate reports from transcript data spent a month rewriting jobs as durable executions after cascading errors from failed API calls and memory issues broke the entire generation process with little visibility. The developer is now seeking advice on handling agent failures mid-process, the typical ratio of engineer-weeks spent on agent infrastructure versus logic, and whether to buy or build tools for durability, monitoring, and user progress reflection.

read1 min publishedMay 31, 2026

For a bit of context, I’m currently creating a team of AI agents at work to generate reports by fanning out into a large amount of subagents to process a large amount of transcript data. When the analysis fails mid-way because of some individual step like an API call returns an error or the machine is out of memory, it would create cascading errors that break the entire generation with almost no visibility. I’ve just spent the past month rewriting the individual jobs as durable execution jobs on DBOS but just wondering if there are better solutions out there and if others encountered similar issues? And then there is the issue to reflect back the progress to the users which I’ve just been coding ad-hoc honestly… When an agent fails at step 9 of 12, how do you handle that?

Roughly how many engineer-weeks have you sunk into agent infrastructure (durability, monitoring, human-in-the-loop, live UI) vs. the actual agent logic? Curious if my ratio is normal.

For those who built this stuff in-house: was it ever a build-vs-buy conversation? What would a tool have had to do for you to buy instead of build? Do you currently pay for anything in your agent stack (LangSmith, Temporal, Braintrust, etc.)? What made that one worth a line item when others weren't and should I look into it too?

Comments URL: [https://news.ycombinator.com/item?id=48342441](https://news.ycombinator.com/item?id=48342441)

Points: 1

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