@@ -88,6 +88,19 @@ Get a checkout of this repo onto the Pi
 sudo scripts/install.sh
 ```
 
+The installer takes three optional feature flags, combinable as needed (e.g.
+`sudo scripts/install.sh --homekit --schedule`):
+
+- `--homekit` — installs the HomeKit deps into the venv and enables the Lightbulb
+  accessory, so the display can be controlled from the Home app / Siri (§4).
+- `--schedule` — enables the in-app day/night schedule (blank the display by day,
+  wake it in the evening, dim it at night; times and levels tunable — §5).
+- `--reboot` — enables a monthly midday reboot that returns the appliance to a
+  known-good state (§6).
+
+Each flag fully toggles its feature: re-running the installer without a flag disables
+that feature, so pass every flag you want active on each run.
+
 Creates `clocker` (system user, `i2c` group, no sudo), creates the `clockctl` group (gates
 the `piclockctl` control socket — see §3), deploys to `/opt/piclock`, builds the venv,
 installs + enables `piclock.service`, installs `piclockctl` to `/usr/local/bin`, and
@@ -134,7 +147,8 @@ The commands travel over a Unix socket (`/run/piclock/ctl.sock`, mode 0660) gate
 `sudo usermod -aG clockctl <user>` (log out/in to pick it up).
 
 Config via `PICLOCK_*` env (in the unit): `PICLOCK_24H=1`, `PICLOCK_BRIGHTNESS=0..15`,
-`PICLOCK_BLINK=0/1`, `PICLOCK_DISPLAY=null` (run without hardware), and
+`PICLOCK_BLINK=0/1`, `PICLOCK_SYNC_DOT=0/1` (lower-left dot lit while NTP-synced, dark when
+free-running; on by default), `PICLOCK_DISPLAY=null` (run without hardware), and
 `PICLOCK_WAKE_BRIGHTNESS` / `PICLOCK_NIGHT_BRIGHTNESS` (0-15 levels the optional day/night
 schedule applies at its wake and dim edges — see §5; the schedule's on/off switch and times
 live in its drop-in, also §5). The unit sets