proskillv1.0.0✓ verified
feature-flags-experimentation
Ship behind flags and learn from experiments — progressive rollouts, kill switches, deterministic bucketing, flag lifecycle and debt cleanup, A/B test design with guardrail metrics, sample-size sanity, and avoiding peeking. With a runnable bucketing check.
$npx vanara install feature-flags-experimentation
Included with Vanara Pro ($10/mo) — unlocks all 206 items. See pricing →
Overview
Flags decouple deploy from release: code ships dark, exposure is a runtime decision, and rollback is a config change instead of a deploy. Experiments add measurement on top. Both are cheap to start and expensive to run undisciplined — flag debt and phantom "wins" are the failure modes. Deep detail in references/; a deterministic bucketing implementation and an experiment one-pager template in exam
What it covers
- Flag taxonomy (different rules per type)
- Deterministic bucketing (the core mechanic)
- Progressive rollout playbook
- Experiments: the discipline part
- Flag debt and lifecycle
- Experiment Design Without Self-Deception
- Rollout Mechanics