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https://github.com/Matysh/houseplan-card
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Visitors hold admin sessions (the editor demo needs is_admin), and some of them restarted HA from the UI — exit code 100 between hourly resets looked like stand instability. demo_guard re-registers restart/stop as no-op services after startup; the hourly docker-level reset is untouched. stand-reset-timer.js logs a per-minute countdown to the :00 reset in the browser console (warn for the last 5 minutes); stand-dev-info.js is the one-shot dev-stand note. Also on the stand host: mem_limit 1536m per container in compose.yml as an OOM safety net.
Synthetic demo home
A fully fictional house (plans, devices, states) used for README screenshots, the demo GIF and headless smoke tests — so no real home data ever appears in public materials.
srv/demo.html— self-contained host page:<ha-icon>/<ha-card>stubs and a fakehass(registries, states,callWS,callService, floors).srv/assets/— generated plan SVGs andicons.js(node demo/gen_icons.mjs, needs the repo's devDependencies). The card bundle is copied fromdist/:cp dist/houseplan-card.js demo/srv/assets/.serve.mjs— playwright launcher (route interception, no web server).smoke_*.mjs— feature smoke tests; run with a Chromium installed viaPLAYWRIGHT_BROWSERS_PATH=<dir> npx playwright install chromium-headless-shell.
Note for sandboxed sessions: /tmp does not survive; this directory is the
persistent home of the harness (docs/DEVELOPMENT.md has the LD_LIBRARY_PATH recipe).