The runbook said a flag 'appears in the Unleash UI after the backend has
evaluated it once'. That is wrong. SDKs read definitions from the server
and never register anything, and metrics for an unknown flag are
discarded — so a declared flag is evaluated on every request, stays
False forever, and never shows up until someone creates it by hand.
Found the way these things usually are: staging had been running the
flag code for a while and the UI was still empty.
Also names the environment trap while here — each stack's token is
scoped to one environment, so toggling the other does nothing visible
and looks like the flag is broken.
Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_015mWQnpye9F299NVRCCSRvj
