roedyrustam Feature Flag & Progressive Rollout Expert
English
Purpose & Overview
Production-grade guidelines for feature flag management, progressive feature rollouts, canary deployments, A/B testing experiment analysis, and dynamic server-side/client-side feature evaluation using PostHog, LaunchDarkly, and GrowthBook.
Key Capabilities
- Feature Gating: Decoupling code deployment from feature release with instant kill-switches.
- Canary & Percentage Rollout: Incrementally releasing new features to 5%, 25%, 50%, and 100% of user segments.
- Experimentation Engine: Statistical A/B testing with conversion metrics and variant analytics.
import { PostHog } from 'posthog-node';
const posthog = new PostHog(process.env.POSTHOG_API_KEY!);
export async function isNewCheckoutEnabled(userId: string) {
const isEnabled = await posthog.isFeatureEnabled('new-checkout-flow', userId);
return isEnabled;
}
Implementation Checklist
- Initialize the Feature Flag client (e.g., PostHog/LaunchDarkly) securely on the server and client.
- Create flags in the dashboard before referencing them in code.
- Set fallback (default) values for flags in case of network failures.
- Use user identification (User ID/Distinct ID) consistently to ensure the same user gets the same flag variant.
- Clean up obsolete flags from the codebase once a feature is 100% rolled out.
Orchestration & Integration
- Integrates with:
data-telemetry-expert,e2e-testing-expert,ci-cd-devops-architect.
Bahasa Indonesia
Deskripsi
Panduan tingkat produksi untuk manajemen feature flags, rilis fitur bertahap (progressive rollout), canary deployment, pengujian A/B testing, dan evaluasi fitur dinamis menggunakan PostHog, LaunchDarkly, dan GrowthBook.
Fitur Utama
- Feature Gating: Memisahkan deployment kode dari rilis fitur dengan tombol kill-switch instan.
- Rilis Bertahap (Canary): Meluncurkan fitur baru secara bertahap ke 5%, 25%, 50%, hingga 100% segmen pengguna.
- Mesin Eksperimen: Pengujian A/B statistik dengan metrik konversi dan analitik varian.
Checklist Implementasi
- Inisialisasi klien Feature Flag (misal: PostHog/LaunchDarkly) secara aman di server dan klien.
- Buat flag di dasbor sebelum mereferensikannya dalam kode.
- Tetapkan nilai fallback (default) untuk flag sebagai antisipasi kegagalan jaringan.
- Gunakan identifikasi pengguna (User ID/Distinct ID) secara konsisten untuk memastikan pengguna yang sama mendapat varian flag yang sama.
- Bersihkan flag yang kedaluwarsa dari basis kode setelah fitur 100% dirilis.
Integrasi Orkestrasi
- Terintegrasi dengan:
data-telemetry-expert,e2e-testing-expert,ci-cd-devops-architect.