$ cat post/strace-on-the-wire-/-the-health-check-always-lied-/-the-deploy-receipt.md

strace on the wire / the health check always lied / the deploy receipt


Title: October 2023: AI Copilots, Wasm Convergence, and a Glitch in the System


October 20, 2025. Another crisp autumn morning on the East Coast, and I’m sitting at my desk with the usual cup of coffee. The world outside is bustling with AI-powered assistants, copilots, and virtual agents all around me. In this era, it’s almost as if every piece of software has a built-in AI assistant ready to help or hinder depending on its whims.

This morning, I found myself staring at one of my own projects: an AI-native platform using eBPF for deep packet inspection in our Kubernetes clusters. The project was humming along smoothly until something odd started happening. One of our services kept crashing with segmentation faults, and no matter what we tried, the logs didn’t give us any clear answers.

I sighed and reached for my trusty editor, opening up a series of flame graphs generated by BPF tracepoints. These visualizations are one of the best ways to get a glimpse into the inner workings of our applications. Yet today, they were showing an odd pattern: a spike in memory usage right before the crash.

“Hmm,” I muttered, “sounds like a classic case for tracing.”

I pulled up the eBPF program that we had written earlier this year and started debugging it line by line. The code was relatively simple—just some basic memory allocation and deallocation logic. But as I drilled down into the assembly output generated by our BPF compiler, I noticed something strange.

One of the functions was being called more frequently than expected. This function was responsible for handling incoming HTTP requests from our external API gateway. It seemed that every time an LLM-assisted copilot tried to optimize the request flow, it was causing a chain reaction in our system.

I spent the next few hours tracing through this interaction, trying to understand how the AI copilots were inadvertently introducing more complexity into our infrastructure. Eventually, I found the culprit: a race condition between our BPF program and the copilot’s cache updates. The copilot was trying to optimize too aggressively, causing unnecessary reflows in our data paths.

Once I identified the issue, it was time for some quick surgery. I modified the BPF program to handle concurrent updates more gracefully, adding a few synchronization primitives to prevent the race condition. After recompiling and redeploying, the service stabilized. Phew!

But as I sat back, looking at the now-stable service, I couldn’t help but think about how AI copilots are shaping our world. On one hand, they’re making developers more productive by automating mundane tasks and providing intelligent insights. But on the other hand, they introduce a level of complexity that can be hard to predict and debug.

Later in the day, while discussing this incident with my team, we had an interesting conversation about the convergence of WebAssembly (Wasm) with container technology. We’ve been experimenting with using Wasm modules for parts of our application logic, and it seems like more companies are starting to embrace this approach as well. The idea is that Wasm provides a sandboxed environment where we can run arbitrary code without compromising security.

As we debated the pros and cons, I couldn’t help but feel a sense of déjà vu. Back in 2019, when containers first became popular, there were similar discussions about their trade-offs. Now, it seems that Wasm is following the same path, offering new possibilities while also introducing new challenges.

The rest of the day passed with more coding and planning for our upcoming projects. We had a few meetings to discuss potential integrations between different parts of our stack, including how to better leverage eBPF and Wasm in our multi-cloud environment.

As I closed down my laptop for the night, I couldn’t help but wonder about the future. AI-native tooling has become an essential part of our workflow, but with great power comes great complexity. How will we navigate these new challenges as platform engineers? Only time will tell, and that’s what makes this era so exciting.


[This post is a reflection on my day-to-day work in 2025, intertwining real-world technical challenges with the broader trends shaping the tech industry at the time.]