Make pipelines deterministic and idempotent

Make pipelines deterministic and idempotent | BeforeMerge Rules | BeforeMerge

Why this matters

A step you can safely re-run is a step you can trust. Pipelines that depend on mutable shared state, network flakiness, or 'latest' inputs produce intermittent failures and make retries dangerous. Pin inputs and make each step idempotent.

Bad

rsync ./out/ server:/app/   # partial state on failure; re-run differs

Good

deploy app:$SHA   # immutable input; re-running yields the same result

Why This Matters

Related Rules

Catch this automatically on every PR

Why this matters