Curated developer articles, tutorials, and guides — auto-updated hourly


Webhook integrations (ep#3, ep#4) tell you when a pipeline started and whether it passed. They don't...


In the original Eval Gap post, we laid out the problem: the distance between "works in demo" and...


Four LangChain agents ran for 11 days on a misclassified retry. $47K bill. Every span returned 200. ...


Four LLM observability platforms, one real workload, no vendor angle. What each gets right, what it ...


Evaluation assigns values. Observation reads structure. Get the entry point wrong and every destinat...
![[The 8-Turn Problem] Why Your Agent Fails at Turn 3 and You Only Notice at Turn 7](https://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fnykwv243k5z9b5dj9i39.png)

Last Tuesday an agent I shipped decided, mid-conversation, that the user's name was "Export CSV." It...


02:14. Every span in the trace is green. The customer says the AI is lying. Both are true. What your...


Your APM is world-class at HTTP. It has no vocabulary for a response that is fluent, confident, and ...


The gateway in your stack routes every LLM call. After March 2026's LiteLLM security incident, treat...


Triage theater is the 40-minute meeting that starts with QA saying "users report the upload is...


A time-based playbook for on-call engineers responding to an LLM-feature incident. Five triage branc...


Opus 4.6 users are reporting a sharp quality drop. Anthropic isn't saying. Your APM sees nothing. He...


Read every public AI-incident postmortem from the last two years and six patterns repeat. Six. One i...


Every failure mode here returns 200. Latency is fine. Cost looks reasonable. Users are furious. Here...


Seven real LLM outages with dollar figures attached. For each: the signal that would have caught it ...


The vendor-neutral standard for LLM tracing. What attributes to emit, what the span tree should look...


Before your LLM feature meets a paying customer, these 18 items should all be true. Copy-paste, tick...


Your retrieval metrics are green. Your users are confused. Five RAG failure modes that aggregate das...


Claude Code logs everything but surfaces nothing. Three developers built the observability layer the...


A team ran LLM-as-judge for 11 weeks with a green dashboard. The judge had learned to admire its own...


The gap nobody talks about There are 10,000+ Model Context Protocol servers now. Every...


TL;DR A GPU trace of a PyTorch DataLoader bottleneck (114x slower than direct indexing)...


Your Datadog bill crossed $50K and finance flagged it. Here is the 2026 migration path teams are act...


Anthropic had two outages on April 7 and 8, 2026. If your users felt them, your multi-provider fallb...