The journey of every round

Add global exception handling middleware that maps domain exceptions to HTTP status codes

Add a health check endpoint

Write a distributed transaction coordinator using the Saga pattern

the app is broken

Add OpenTelemetry tracing instrumentation across HTTP, database, and queue boundaries

something is wrong

i need help

Implement a sliding window aggregation over a time-ordered sequence

change how it works

Write a query that calculates a running total using Aggregate

update the thing

its broken

Implement a business rule validator that checks account balance before transfer

make it work

Write a validation pipeline behaviour in MediatR that collects all errors

fix it

Implement an event store that appends events and rebuilds aggregates

No entity, no technology, no domain. Just an action verb or complaint.

Write a Saga orchestrator for a multi-step order fulfilment workflow

Implement an outbox pattern that ensures at-least-once delivery

Write a circuit breaker for cache reads that falls back to the database

Add cache stampede protection using lazy loading and locks

Write a worker that retries failed outbox messages with exponential backoff

Add scoped service access inside a BackgroundService using IServiceScopeFactory