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Field notes for a working system.
Three decisions, three practical guides. Each comes with examples, operational limits and primary references.
01 / MIGRATION
Express to Lambda, one route at a time
Carry one HTTP route across a deployment boundary. Protect its semantics, isolate slow work and leave yourself a credible rollback.
Read field note 02 / CAPACITYRead a workload before scaling it
Use attempts, occupancy and downstream capacity to make a testable choice about concurrency.
Read field note 03 / RELIABILITYRetries, duplicates and safe replay
Identify the layer that retries work, preserve business identity and build a usable path for events that run out of attempts.
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