jaas-ui runs standalone against whatever JAAS_API_URL points at, including a backend it didn’t start itself.
Full stack, from jaas-ui
../jaas-skills and ../jaas_guardrail as sibling checkouts. Override the paths with JAAS_BACKEND_DIR / JAAS_GUARDRAILS_DIR, or set either to an empty string to skip starting it — useful if a backend is already running elsewhere (point JAAS_API_URL at it instead). Run ./run.sh --help for the full list of overrides.