Feature Request: Toggle Discovery and Filtering by Tags

[juliomariano-hotmart]

Describe the feature request

Summary

Add support for discovering and filtering available toggles based on tags to enable better toggle organization and selective loading capabilities.

Problem Description

Currently, the unleash-proxy-client doesn't provide a way to:

• Discover what toggles are available without loading all of them
• Filter toggles based on tags
• Load toggles selectively based on tag criteria
• Understand toggle categorization through tags

This limitation makes it difficult to:

• Implement efficient lazy loading strategies based on feature areas
• Organize toggles by tags (e.g., 'purchase', 'mobile', 'experiment')
• Load only relevant toggles for specific contexts or components

Proposed Solution

Add discovery and filtering capabilities to allow querying toggles by tags without loading all toggle values.

Background

As applications grow and adopt more feature toggles, several critical problems emerge:

1. Scale Management Crisis: Organizations often have hundreds or thousands of feature toggles across different projects, teams, and environments. Without proper discovery mechanisms, developers lose track of what toggles exist and which ones are relevant to their work.

2. Performance Impact at Scale: Loading all toggles becomes a significant performance bottleneck as the number of feature flags grows. A typical enterprise application might have 200+ toggles, but a specific page or component might only need 5-10 of them.

3. Wasted Resources: Current all-or-nothing approach leads to:

   • Unnecessary network bandwidth consumption
   • Increased memory usage on client devices
   • Slower application startup times
   • Higher server load serving unused toggle data

Solution suggestions

// Get all toggles with specific tag
const frontendToggles = await unleash.fetchTogglesByTags(['frontend']);

// Get toggles with multiple tags (AND operation - toggle must have ALL tags)
const mobileExperiments = await unleash.fetchTogglesByTags(['mobile', 'experiment']);

// Get toggles with any of the specified tags (OR operation)
const uiToggles = await unleash.fetchTogglesByTags(['ui', 'theme'], { operation: 'OR' });

[gastonfournier]

I think this is something that should be dealt with by using specific projects. If you're using the frontend API you'll only receive features that evaluated to true, which is already the minimum the client requires.
We're closing this as won't fix.