Apply scenario-fixture.patch to a checkout of main that contains the scenario runner, and copy device-stop-failure.e2e.ts into scripts/scenarios/.
Set PROOF_OUTPUT_DIR to a fresh scratch directory for sanitized runtime summaries.
Run:
T3CODE_DEV_SEED=0 vp run scenarios:prove scripts/scenarios/device-stop-failure.e2e.ts --base b63d3c592318ce936f787c48023f0dba498056dd --head 0e1e6b63cd22e16b98480dbd4ce1b1201908b333 --upload-command 'ghdrop upload'

The fixture enables device support and agent device access before server startup and selects only the web target. The scenario creates a synthetic installed agent-device 0.21.36 whose daemon stop exits 1, records a live dummy daemon, pairs the browser, and turns access off in Settings > Devices. Runtime summaries confirm the stop call, live daemon, unchanged record and saved access value. The dummy process is stopped in finally.