Jev-Driven SRE Diagnosis: What Worked and What Failed

> Ultimately, we believe that incorporating Jev-driven diagnosis into an SRE agent’s workflow is a significant step toward effectively combining System One and System Two models. Why? What’s the end goal? Lower cost? Faster analysis? I configured an agent to respond to pages via Slack. It has access to ClickStack (for telemetry), Kubernetes, and GitHub. It runs one of the Sonnet models. The cost is so low, responding to less than a dozen pages a day (mostly from a very sensitive error count alarm) that swapping got Jev makes zero sense. This is especially true if the results are less trustworthy.

• victor9000 · 2 hours ago

  using jev is a significant step towards using jev

  • s_Hogg · 32 minutes ago

    No-one ever got fired for using Jev

It seems to me that Jev is designed for when many quick decisions, with low input context, need to be made. SRE work is probably best suited for very few critical decisions that need to be made, with high input context.

Lots of hype-mongering around Jev atm. Color me sceptical.

• yehosef · 12 minutes ago

  can haiku play doom?

Premise is flawed: SRE is not a throughput problem, it is an accuracy problem.

• jasonjmcghee · 3 hours ago

  I'm guessing you're getting downvoted due to dismissive tone, but I think there's truth to this. Labeling something as "don't escalate" that should have been isn't great. Paying 5x and having to wait 10s instead of 100ms or whatever for a reasoning model (with tools?) is very likely worth it.

• sdcfgy · 2 hours ago

  Yes and with an incredibly large context and incredibly large domain specific knowledge. We had an LLM based SRE product from a vendor I won't mention because we had an NDA as our management is sucking them off by trading whitepapers for discounts. It was like a drunk monkey with a wrecking ball. Think we had to pull it in under 2 weeks because it took out multiple production systems and lead to an entire cluster failover. The meat sacks now know they have job security.

  • PunchyHamster · 51 minutes ago

    My experience is that SRE-esque work you experience the full range of model, from "wow, it would take us ages to even get to this theory for why something failed" to "well the priority field in this protocol goes from lowest=most important, but LLM wrote code as if it was highest=most important, so if someone actually pushed it to production the company wouldn't have working internet access any more". And a lot of "wishing up a feature", I was using it to explore solutions for a given problem in too I didn't knew 100% and it pretty much came to same solution I wanted to do but... the capabilities were not there in the tool so it just started making up probable config clauses, and of course, it didn't work. Even on simpler stuff there were traps, for example in middle of debug session I asked it to modify Gitlab config to add request duration logging, so it added correct config format to a flag that didn't exist (option was there, just under different name), because it didn't bother to read the docs (since then I generally link it the docs first so it doesn't try to remember and get it wrong). All of that is both very dangerous, and also easily fixed by just having competent operator there. And as a tool it's great, as replacement it is just AI bros delusion

This is an interesting experiment. Curious why you used LLM-as-a-Judge (gpt-6-astra). Did we have a ground truth of actual RCA done by a human to compare against?

I switched to a decision model for my local "AI" voice control thingy. faster-whisper produces the text then onnx scores all my HA entities to determine which one I'm talking about .. then it lists all its actions and a second scoring round to determine what action I want. some regex to extract numbers if I'm saying things like "water the lawn for 10 minutes". It's pretty dumb when compared to what an LLM can do but considering you now have semantic scoring "at your finger tips" without resorting to levenshteins or other crude algorithms like that it's insane how smart it can look. And to answer the obvious question: because latency. This thing turns on the light or water valve in under 100ms on a laptop from 2001 with 8gb ram .. all running locally on the laptop.

• yehosef · 15 minutes ago

  repo?

> SRE work is probably best suited for very few critical decisions Yeah, and the article puts the cost of all 105 diagnoses at about $0.15 in Jev calls. At a dozen pages a day, I wouldn't worry much about the bill for either model. I'd be more interested in the pass rate: 76.2% vs 77.8% for GPT-5.6 Sol (medium). I can see trying a cheaper model first if you're handling lots of requests and it can resolve most of them without escalating. A dozen pages a day doesn't seem like a reason to add that extra step.

Using Jev for SRE seems like such a backwards prospect. You don't need split-second velocity, you don't need costs savings. What you DO need and Jev provides not at all - is auditability. You want to know WHY and HOW the calls were made, as with humans so with AI. Adding a black box in there seems incredibly misguided, no? The same way I'd not trust an SRE when they've "got a feeling", I don't intend to start trusting Jev. The audit of process doesn't allow audit of reasoning.

• yehosef · 13 minutes ago

  I had the same feeling. it seems like jev is a classifier that's smarter than bag of words but I would not think it would do well to ask it to judge code fix effectiveness.