feature-flags

Feature Flags

Use configwatcher to react to live configuration changes — the core feature flag pattern.

What this demonstrates

• Registering typed boolean fields with default values
• Starting the watcher (loads initial snapshot + subscribes to live stream)
• Reacting to changes via the Changes() channel
• No polling — changes arrive instantly via server-push

Run it

go run .

Then in another terminal, toggle a flag:

decree config set <tenant-id> features.dark_mode false --insecure

Watch the output update in real time.

Expected output

Feature flags loaded:
  dark_mode:    true
  beta_access:  false

Watching for changes... (Ctrl+C to stop)
[14:32:05] dark_mode changed: true → false

Learn more

• configwatcher package — watcher API reference
• Subscribe RPC — underlying gRPC streaming API
• Previous: Quickstart | Next: Live Config →