@flaghoist/adapter-memory

Keep Flaghoist flags in memory. Useful for tests, local development, and anywhere you want a flag server that starts clean every time.

npm install @flaghoist/adapter-memory

import { memoryAdapter } from '@flaghoist/adapter-memory'
import { createFlagServer } from '@flaghoist/server'

const app = createFlagServer({
  storage: memoryAdapter(),
  auth: {/* ... */},
})

You can seed it, which is what makes it pleasant in tests:

memoryAdapter([{ key: 'new-checkout', enabled: true, rollout: { percentage: 100 }, rules: [] }])

Everything disappears when the process exits. That is the point, but it does mean this is not the one to reach for in production. Webhook endpoints and audit entries are kept in memory too, with the same lifetime as the flags.

It is validated by the same conformance suite as the other adapters, so it behaves like the real thing rather than like a stub that drifts.

Status

Pre-alpha, built and maintained by one person. The API can still change without notice, and production use is not recommended yet. If you try it and something breaks, an issue is genuinely useful.

Apache-2.0. Part of Flaghoist.