Plans safe deprecation, migration, sunset, replacement, and removal of old systems, APIs, features, schemas, flags, cron jobs, integrations, configs, libraries, UI flows, and operational processes. Use when retiring legacy code, replacing an implementation, removing a public/internal interface, migrating consumers, consolidating duplicate systems, deciding maintain-vs-sunset, writing deprecation notices, proving zero usage before deletion, or when Hyrum's Law, compatibility, rollback, data safety, production risk, or consumer communication matters.
How to install deprecation-and-migration?
pimenov/codex-first-skills-pack/deprecation-and-migration
$npx -y skills add pimenov/codex-first-skills-pack --skill deprecation-and-migrationInstalls into the current project.
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Run `npx skills use "https://github.com/pimenov/codex-first-skills-pack" --skill "pimenov/codex-first-skills-pack/deprecation-and-migration"` and follow the generated skill instructions now. Read its complete output, redirecting it to a temporary file first if necessary. Resolve relative paths from the supporting-files directory it provides.
Use the skills in "https://github.com/pimenov/codex-first-skills-pack" that are relevant to the current task. Run `npx skills add "https://github.com/pimenov/codex-first-skills-pack"` and select the relevant skills, then follow their instructions.
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