Feature Flag
علم الميزة
Definition
A configuration value that enables or disables a feature in production without deploying new code — allowing gradual rollouts and safe testing of new features.
قيمة تكوين تُمكّن أو تُعطّل ميزة في الإنتاج دون نشر كود جديد — مما يسمح بإطلاق تدريجي وتجربة آمنة للميزات الجديدة.
Why It Matters
Sprint 5 features (AI Teacher, AI Builder) must not be visible to public users until they are ready. Feature flags let Omar deploy the code to production, test it internally, and flip the flag to enable it for everyone — without a new deployment. This is how professional teams ship features confidently.
ميزات Sprint 5 (AI Teacher وAI Builder) يجب ألا تكون مرئية للمستخدمين العامين حتى تصبح جاهزة. تسمح أعلام الميزات لعمر بنشر الكود للإنتاج واختباره داخلياً وتبديل العلم لتمكينه للجميع — دون نشر جديد. هكذا تُطلق الفرق الاحترافية الميزات بثقة.
Full Definition
Example Usage
“In Next.js: `// src/lib/features.ts export const FEATURES = { AI_TEACHER: process.env.FEATURE_AI_TEACHER_ENABLED === 'true', AI_BUILDER: process.env.FEATURE_AI_BUILDER_ENABLED === 'true', } as const;`. Usage: `if (FEATURES.AI_TEACHER) { return <AITeacherPanel />; }`. Toggle in Vercel dashboard without redeployment.”
“في Next.js: `// src/lib/features.ts export const FEATURES = { AI_TEACHER: process.env.FEATURE_AI_TEACHER_ENABLED === 'true', AI_BUILDER: process.env.FEATURE_AI_BUILDER_ENABLED === 'true', } as const;`. الاستخدام: `if (FEATURES.AI_TEACHER) { return <AITeacherPanel />; }`. التبديل في لوحة Vercel دون إعادة نشر.”
AI Builder Tips
Avoid these mistakes when using Feature Flag:
Leaving feature flags in code indefinitely — flags are temporary; clean up old flags after full rollout or removal
Checking feature flags in shared library code — flag checks in a shared `lib/` function make the logic harder to trace; check at the component/route level
Not adding the flag to documentation — if a flag exists in production and a new engineer doesn't know about it, they cannot debug related behavior
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Help me build a project using Feature Flag. Explain: 1. What is Feature Flag and why it matters 2. The core architecture and required tools 3. Step-by-step implementation plan 4. Common mistakes to avoid: Leaving feature flags in code indefinitely — flags are temporary; clean up old flags after full rollout or removal, Checking feature flags in shared library code — flag checks in a shared `lib/` function make the logic harder to trace; check at the component/route level, Not adding the flag to documentation — if a flag exists in production and a new engineer doesn't know about it, they cannot debug related behavior 5. Best practices and production tips