retire-and-replace

Walks the full retirement of a software system as a demolition project: a measured survey returning one of three verdicts (invest, build the replacement first, retire onto a production-proven successor), load diversion one caller at a time via traffic ramps, facades, or per-customer switches, and foundation-safe database changes staged as separate add, dual-write, backfill, read-switch, and remove releases, each reversible step shipped with a rehearsed down path and every individual production action carrying its own explicit human sign-off, including acknowledgment of one-way doors such as column removal. Use when consolidating overlapping implementations, retiring an API, library, or feature, moving consumers onto a successor, or reshaping a live production column without downtime. Not for incident response, greenfield builds, or general release and deployment mechanics.

Version

v1.0.0

Size

18 KB

Updated

2026-10-07

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