Implementing Feature Flags Across Stack

Short summary

A developer built a database-driven feature flag system in Vue 3/C#/SQL to decouple releases from deployments in a restricted-access network. The architecture includes metadata tracking, split API models to prevent data leakage, and a Vue admin UI, with key lessons on state caching, version drift, and optimal flag refresh timing.

• •Designed database table with flag metadata (creation/modification timestamps, work item IDs) to provide transparency and traceability
• •Implemented security by layers: split API endpoints (admins get full model with metadata, app only gets flag name and enabled status)
• •Grappled with frontend state management: balancing caching efficiency against real-time updates when flags change mid-session

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