the project lead, 5 October 2026: "if we don't have to ask then don't ask". The NVIDIA power cap and the efficiency sweep need
administrator rights (one UAC prompt); PC 1 raised that prompt for cmd.exe at every app start and every sweep attempt
(17:00, 17:30, 18:12, 19:04 UTC today, each cancelled unanswered after 2 minutes; the "Windows Command Processor"
the project lead saw).
- config.rs: `power_control` (default OFF on every machine); `sweep` default becomes off and is implied by it (an
install carrying sweep = true without power_control is migrated to off on load).
- engine.rs: `elevation_allowed(power_control, sweep_only)` gates the power cap (`power_cap_plan` builds nothing when
off, the card note says so), the sweep scheduler, Sweep now, the sweep helper; no prompt on quit (the limits reset at
the next reboot); no second prompt through PowerShell when the window host's prompt goes unanswered.
Cmd::PowerControl(on): on = ONE prompt at that moment (every NVIDIA cap in one step), off = nothing asks;
`power_control_after_prompt` turns a refused, cancelled or unanswered prompt into "power control off:
administrator rights were not given" (switch back off, sweep off, no retries). Unit tests: off builds no elevated
command; on + refusal gives the notice; rights given keeps it on.
- platform.rs: `elevated_failure` maps the launcher's exit 251 and the "canceled" wording to the prompt, any other
code to the step itself.
- server.rs: POST /api/power/control {on}. ui: the Power control switch with the line "Windows asks for administrator
rights once; the cap and the sweep need them", the note beside it, the sweep switch disabled while it is off.
- The clock-sync prompt stays behind the Sync clock button only (unchanged).
- tools/windows/power-prompts-off.ps1: the 0.3.9 job that switched PC 1's sweep off through the API it has
(run-20261005-192313: sweep True -> False; the 0.3.9 cap has no off switch, it asks at an app start only).
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
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