Individual skill

feature-flagging

Operational discipline for feature flags as production infrastructure. Flag types, naming, targeting rules, rollout strategy, lifecycle, governance, stale flag management, and the technical debt patterns that bite teams who weren't deliberate about it.

dist/codex/.agents/skills/feature-flagging/SKILL.md

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Last checked: Nov 4, 2026

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SKILL.mdcore · 25,629 bytes
SKILL.mdcore · 25,629 bytes
SKILL.mdcore · 25,629 bytes
references/_claude-frontmatter-extras.yamlasset · 443 bytes
references/flag-lifecycle-checklist.mddoc · 5,006 bytes
references/flag-naming-conventions.mddoc · 5,094 bytes
references/flag-rollout-strategies.mddoc · 7,061 bytes
references/flag-types-reference.mddoc · 6,712 bytes
references/governance-and-permissions.mddoc · 6,954 bytes
references/stale-flag-cleanup-playbook.mddoc · 6,154 bytes
references/targeting-rule-patterns.mddoc · 6,706 bytes

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# Feature Flagging

A senior engineer's playbook for using feature flags well, not just frequently.

Feature flags are infrastructure. Treated as such, they enable kill switches, gradual rollouts, A/B experiments, permission gates, and operational toggles without redeploys. Treated casually, they become the largest accumulating technical debt in your codebase: thousands of dead flags, conflicting evaluation logic, brittle targeting, and a permission surface no one fully understands.

This skill is the discipline that prevents the second outcome. It assumes you have a feature flag platform (LaunchDarkly, Flagsmith, Split.io, VWO FME, GrowthBook, Statsig, PostHog, Optimizely; the platform does not matter for the principles). It assumes your engineering team can implement targeting rules and SDK integration. The hard part is the operational discipline, and that is what is here.

When to use this skill: any time you are about to introduce a flag, modify a flag, audit existing flags, or design a flag-related governance policy.

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## What this skill is for