Feature Flag Bundle Laravel Package

Product Decisions This Supports

• Gradual Feature Rollouts: Enable controlled deployment of new features (e.g., A/B testing, canary releases) without full code branching.
• Kill Switches: Rapidly disable problematic features in production via runtime toggles.
• Environment-Specific Logic: Conditionally activate features based on environment (dev/staging/prod) or user segments.
• Decoupled Backend Logic: Separate feature eligibility rules from business logic (e.g., "Show X to users in Region Y").
• Roadmap Flexibility: Avoid hardcoding feature availability; defer decisions to runtime/configuration.
• Build vs. Buy: Prefer this over custom solutions if needing a lightweight, Symfony-native feature flag system without external dependencies (e.g., LaunchDarkly).

When to Consider This Package

• Avoid if:
  • You need enterprise-grade feature flags (e.g., advanced targeting, analytics, or audit logs) → Use LaunchDarkly, Flagsmith, or Unleash.
  • Your team lacks Symfony expertise → Consider a framework-agnostic solution (e.g., Laravel’s built-in flags or a microservice).
  • You require multi-tenant isolation or high-scale performance → Evaluate dedicated SaaS tools.
  • Your flags need persistent storage (e.g., database-backed) → Extend with a custom ProviderInterface (e.g., Doctrine example) or use a dedicated package like spatie/laravel-featureflags for Laravel.
• Use this if:
  • You’re in a Symfony ecosystem and want minimal setup.
  • Flags are simple (boolean checks, no complex targeting).
  • You prioritize developer experience (attribute-based declarations, Twig/routing integration).
  • Your flags are configuration-driven (e.g., environment variables, YAML) or logic-based (e.g., date checks).

How to Pitch It (Stakeholders)

For Executives: "This package lets us toggle features on/off in production without redeploying—critical for rapid iteration and risk mitigation. For example, we can test a new checkout flow with 10% of users before full rollout. It’s lightweight, open-source, and integrates seamlessly with Symfony, reducing dev overhead compared to third-party tools."

For Engineering: *"A Symfony-native feature flag system with:

• Zero external dependencies (self-hosted, no API calls).
• Flexible providers: Use environment variables, database queries, or even GitLab/Unleash integrations.
• Developer-friendly: Declare flags with PHP attributes (e.g., #[AsFeature('xmas')]), use them in routes/Twig, and chain providers for fallbacks.
• Future-proof: Extend with custom logic (e.g., user segmentation) via ProviderInterface."*

For PMs: *"Enables data-driven releases:

• A/B test new UI components without branching.
• Kill switches for critical bugs (e.g., disable a broken payment flow instantly).
• Environment parity: Ensure dev/staging/prod align on feature availability.
• Low friction: Flags are defined in code (no separate dashboard to manage)."*