Structured Logging in Next.js with Pino (Request IDs to stdout)
A request failed in production at 02:14 and the only thing you have is console.log("error", err) somewhere in a route handler. You cannot tell which…
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Free Tokens Are Not an SLO: An Ops Cost Drill for AI Batch Queues
Free Tokens Are Not an SLO: An Ops Cost Drill for AI Batch Queues This week, two numbers trended: a harness at 100%, a model at 30%. For platform te…
Structured API Logging in 2026: Correlating Response Status and Delivery Latency
Short answer: record one structured completion event at the request boundary, emit separate events for every asynchronous notification attempt, and…
Real-Time Monitoring for AI Agents: Beyond Log Streaming
Most agent monitoring is "log everything and grep later." That's not monitoring — that's archaeology. What We Actually Need Live execution view — Wh…
Vercel CLI overhaul: DNS, domains, project management
This week's tooling news is largely a Vercel story—CLI expansions, observability upgrades, sandbox regionalization, and a free tier reshuffle landed…
Your outage monitor under-counts outages and over-states their length, at the same time
I have a poller that watches a wifi link. Every 60 seconds it asks "are we associated?" — if not, it opens an episode, climbs a remediation ladder,…
Frontend Backend Correlated Logging: Browser Fetch Request IDs and Server Logs
Short answer: give each browser fetch a request ID, carry it to the backend in a standard HTTP header, and emit that same ID in structured logs on b…
A silent failure looks exactly like a feature you never built
Your system has memory. Your user is typing into someone else's chat box. That gap is the whole problem, and it is not a retrieval problem. The plac…
LLMOps for Compound AI Systems — Observability & Cost
Why most GenAI pilots crumble after launch Most GenAI pilots don't fail because the models are bad — they fail because the surrounding system wasn't…
The report was there every day. Nobody read it.
We built a small pipeline that publishes a post once a day, if there's something ready to publish. Every morning it checks a folder. If the folder h…
Cheapest Hosted App Log Search for Small Businesses: A Practical Comparison
Short answer: compare a hosted app log search service, self-hosted Loki, and Elastic Cloud by the operational boundary each one creates. Low effort,…
Node.js Express Observability: A Beginner's Health Endpoint-to-Uptime Signal Contract
Short answer: for a flagged fintech pricing change, use an external uptime monitor to test whether the public path is reachable, then use an interna…
App Health Endpoint Design: 3 Probes That Keep Logging and Metrics Useful
Short answer: for a Node.js app in Docker or Kubernetes, give startup, readiness, and liveness probes separate meanings, keep routine health traffic…
FastAPI and Node.js Property Incidents: 7-Field Error Schema for Request Correlation
Short answer: send normalized failures from every FastAPI and Node.js service to one capture endpoint, carry the same trace ID through the request p…
The enum value that had never been written
I found 27 workflow branches that were being skipped while every run still finished as COMPLETED . The condition on those branches could never match…
Node.js Product Analytics-Style API: 3 Metrics Dashboard Rollback Drills
A product analytics style metrics dashboard page says a nightly media pipeline produced 18,420 searchable articles when 18,487 were eligible. The No…
Never key anything on a redaction placeholder
A log scrubber sits between every writer and the shared log on my machine. Last week it did its job perfectly and, in doing so, silently marked two…
The Observability Crisis: Why OTel Alone Fails for AI and How to Build a Resilient Pipeline
Originally published on tamiz.pro . Observability in software engineering has long been the domain of metrics, traces, and logs. OpenTelemetry (OTel…
4 Non-obvious learnings from working with alerts
Alerting is a details game. Nobody gets paged by their intent — they get paged by the exact query they wrote. If you want to sleep through the night…
Can We Automate the Work of a Software Engineer? The Story Behind HEALER
In my previous article, I wrote about X-Ray — an observability system that grew out of my work on PAD+ AI. Read the X-Ray article on Habr Before X-R…
A Reason Code Without a Source Is Half a Diagnostic
A failure message can be technically correct and still be frustratingly incomplete. Consider a timeout. It tells us something important about the fa…
Node.js Gateway API Observability — 6 One-Key Signals for OpenAI, Claude, Gemini Fallbacks
Short answer: for a Node.js service that turns logistics sales calls into CRM actions, use a unified gateway when one key and simple fallback matter…
The $11k cloud bill was mostly the tools you added to watch the cloud bill
A startup with only six engineers calculated the cost of their monthly cloud bill to be $11,847. The majority of the data generated was not from the…
The alarm wasn't silent. It was lying.
This is a submission for DEV's Summer Bug Smash: Clear the Lineup powered by Sentry . Project Overview agentic-os is a small self-hosted observabili…
From Flat Logs to Execution Trees: Debugging Modern AI Agents
An agent trace is usually written as a sequence of events because append-only data is simple to produce: span_started span_started span_ended span_s…
Healthtech SaaS Pricing: Node.js Feature Flag Percentage Release with Audit Telemetry
Short answer: use a simple percentage flag for the staged pricing release, but treat the flag as a control input rather than an incident record. For…
Designing Transaction Monitoring Dashboards for FinTech Operations
Designing Transaction Monitoring Dashboards for FinTech Operations A payment system can return successful API responses while transactions remain pe…
Marketplace Call Summarization API: Multiple Documents, Async Jobs, Verified CRM Exports
TL;DR For marketplace sales calls, use an async job when several documents must become one reviewed set of CRM actions; use an inline request only w…
Retry context: building observability into retry decisions
Originally published on Loop & Retry — field notes on building LLM agents that survive production. The fleet-patterns post explained the pattern…
"Your cache hit rate is low" — true, and worth $0.16
Anthropic emailed our org last week: prompt cache hit rate is low, and caching repeated content "could save up to 64% of direct API spend." The emai…