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Show HN: Node.js type-safe dynamic config with real-time updates (MIT)

https://github.com/replane-dev/replane-javascript/tree/main/packages/sdk

NodeJS TypeScript client for watching configuration values with real-time updates. Zero runtime deps, works in Node 18+. Override rules are evaluated client-side so user context never leaves your app.

Use it for feature flags, rate limits, timeouts, kill switches—anything you'd rather change without a deploy. Changes propagate in under a second. Roll back instantly if something breaks.

npm: https://www.npmjs.com/package/@replanejs/sdk

GitHub: https://github.com/replane-dev/replane-javascript/tree/main/...

( 1 comment | on HN )
Re:Show HN: Node.js type-safe dynamic config with real-time ... by tilyupo on Wednesday January 07, 2026 @07:29AM (#46525648)
I would love to hear your feedback in the dynamic config sdk design and your use cases