How I Would Separate Dev, Staging, and Production Next

The architecture question is turning the current single-destination pattern into an environment promotion model.

Start with the boundary, not the tool

In the first pass I kept the environment model simple: ArgoCD pointed at HEAD and deployed into the default namespace.

Runtime view

change -> review -> deploy -> observe -> diagnose -> recover -> document

Responsibilities

For this topic, the relevant responsibility is turning the current single-destination pattern into an environment promotion model. The boundary is good when each side can be described without hand-waving: what it receives, what it produces, what it depends on, and what happens if it disappears.

Interfaces and failure isolation

I traced this as change -> review -> deploy -> observe -> diagnose -> recover -> document and checked change diff, deployment status, product behavior, recovery time, repeatability from clean state at each handoff. That kept the debugging path concrete.

The failure I explicitly design against is: As environments multiply, branch, values, namespace, secret, and promotion differences can become accidental drift. That is why I care about the interface, not only whether both pods are currently green.

Scaling implications

The signals I would attach to this boundary are change diff, deployment status, product behavior, recovery time, repeatability from clean state.

Architecture review questions

• Define rollback before the risky change.
• Keep secrets out of plaintext Git.
• Document what is implemented versus what remains a hardening next step.
• Change one layer at a time during migration.
• Review infrastructure by blast radius, not line count.

The design rule I keep is Choose one explicit environment strategy and automate promotion rather than copying manifests by hand. Once the boundary is explicit, both automation and debugging get simpler.