Replace the OpenCV motion-detection daemon with a fido2-token -L check —
presence now means "a FIDO2/U2F key is plugged in", queried without any
touch/tap. Adaptive poll: 20s under light load, 120s under moderate,
600s under heavy. Drops the old motion "grace window" since key presence
doesn't flicker like camera motion did.
Removes presence_detect.py, the presence camera config/test flow from
enroll-biometrics.sh, and the python-opencv dependency (kept v4l-utils,
still used by howdy's camera setup). Adds a standalone presence-test.sh
instead of folding the FIDO check into enroll-biometrics.sh's dialog TUI —
there's nothing to enroll, so it doesn't belong in that flow.
When idle is inhibited manually (a caffeine toggle, not this daemon), the lock
is held regardless of presence, so polling the camera is pointless. Guard the
loop: if the shared idle lock is alive but we don't own it (same test as
caffeine-manual-status.sh), skip the read and leave the camera free for other
apps for the whole manual session. PRESENCE_FLAG is cleared while skipping,
since we're no longer watching — so the widget's presence input reads false
during a manual session instead of showing a stale "camera sees you".
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Rework the Eww caffeine widget into two independent inputs — manual inhibit
and presence detected — yielding four states across all three bars:
neither → sleep, purple
manual only → ☕ coffee, purple
presence only → eye, pink
manual + presence → ☕ coffee, pink
Colour tracks presence; the coffee cup shows only while manually inhibiting.
To make the two inputs independent, the daemon now writes a standalone
/tmp/presence-detected flag each tick (decoupled from lock ownership, so it's
true even during a manual session). presence-status.sh reports that flag
(presence input); new caffeine-manual-status.sh reports lock-held-and-not-
presence-owned (manual input).
Make detection less finnicky: space the detector's frame grabs (0.06s) so slow
movement registers and loopback reads never diff a stale duplicate frame, and
lower the thresholds (delta 25→18, area 2%→0.8%). Add a 90s grace window so
brief stillness never flickers presence off; any motion resets the clock.
Add a third poll tier — INTERVAL_FAST=2s when CPU-or-RAM usage is below 30%
(LOAD_LIGHT) — alongside the existing 20s normal and 120s busy tiers.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Add presence-status.sh reporting true only when the daemon (not a manual
caffeine toggle) owns the shared idle lock, via the existing OWNED_FLAG.
Wire it into all three eww bars: the caffeine button gains a
.caffeine-presence class → the #E40046 Active accent used elsewhere, so
camera-driven auto-awake is visually distinct from a manual session.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Amir Alexander Abdelbaki