flag-removal-runbook-author

Overview

Stale feature flags are technical debt: they bloat the codebase, expand the flag-state matrix per feature-flag-test-matrix-reference, and confuse readers. But removing a flag wrong - deleting code that's actually still gated for some users - is a regression.

This skill produces the runbook for safely removing a flag.

When to use

• A flag is at 100% rollout for ≥ 2 weeks.
• An experiment has shipped; the variant code paths need consolidation.
• A kill-switch hasn't been activated for ≥ 6 months.
• Stale-flag audit surfaced the flag.