sde-debugging

Log analysis strategy and query patterns for the described failure mode

Structured debugging — hypotheses, elimination tests, root cause, fix

Incident response checklist and stakeholder comms template for a live production incident

Blameless postmortem with 5-Why analysis, impact metrics, and SMART action items

SEV classification, on-call response checklist, escalation path, stakeholder comms templates. Use when responding to a live production incident.

Log parsing strategy, correlation ID tracing, distributed trace reconstruction, log query patterns for common Node.js failure modes. Use when investigating an incident from logs.

Memory leak detection in Node.js: heap snapshot analysis, GC pressure diagnosis, reference retention patterns, EventEmitter leaks. Use when a Node.js service grows in memory over time.

Latency profiling workflow, p99 spike investigation, throughput bottleneck isolation, identifying queuing vs processing delays in Node.js. Use when an endpoint or service is unexpectedly slow.

Blameless postmortem: impact quantification, timeline reconstruction, 5-Why RCA, contributing factors, SMART action items. Use after any significant incident.

5 Whys applied systematically, fishbone (Ishikawa) diagram, fault tree analysis — structured to find fixable root causes, not symptoms. Use when debugging a recurring problem or writing a postmortem.