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@signakit/flags-core

v1.3.0

Published

Shared types and functions for SignaKit Feature Flags SDKs

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Links

Git

Maintainers

robbiecrenrobbiecren

Keywords

Readme

@signakit/flags-core

Shared evaluation engine for the SignaKit Feature Flags JavaScript SDKs.

This package is internal. It is consumed by the platform SDKs and not intended for direct use in application code. Install the SDK for your platform instead:

| Platform | Package | |---|---| | Browser | @signakit/flags-browser | | Node.js / Next.js | @signakit/flags-node | | React | @signakit/flags-react | | React Native | @signakit/flags-react-native |

What's in this package

  • MurmurHash3 bucketing — deterministic user assignment into traffic and variation buckets (0–9999)
  • Flag evaluator — evaluates a flag or all flags for a user against the fetched project config, respecting allowlists, audience targeting, traffic allocation, and variation ranges
  • Audience matcher — evaluates rule conditions against user attributes (equals, in, numeric comparisons, contains, and more)
  • Bot detection — pre-compiled regex covering 300+ known bot user-agents across search engines, AI crawlers, monitoring tools, and HTTP libraries
  • Shared types — TypeScript interfaces for ProjectConfig, ConfigFlag, SignaKitDecision, UserAttributes, and all related protocol types
  • Utilities — SDK key parser and attribute sanitizer

All platform SDKs import from this package and are guaranteed to produce identical flag decisions for the same user ID, attributes, and config — regardless of runtime environment.

License

MIT