Environment definitions
Keep the application artifact separate from its configuration, secret references and managed resources. Compare test with production without mistaking every intentional difference for drift.
Read the environment definitionProduction reference
Notes on environment definitions, runtime boundaries, request distributions and database-version overlap. The examples state their assumptions; constructed values are not operating results.
Service boundaries
A web response and a background job have different lifetimes. Follow the entry point, runtime, worker and database before deciding what a platform change must cover.
Inspect the service boundaryRequest distributions
A 1,000-request sample shows how a small slow group can disappear inside a reasonable mean. The note explains percentile selection, request groups and what a latency chart leaves out.
Read the latency noteDatabase-version overlap
A new required field affects old writers as well as new readers. Follow the overlap between application versions before tightening the database constraint.
Read the release note