diff --git a/README.md b/README.md
index 8103e59..2161ef3 100644
--- a/README.md
+++ b/README.md
@@ -72,19 +72,24 @@ One role per firmware image; you choose it when you flash.
 
 All of this is local behaviour. Nothing here changes the wire protocol, so mixed meshes work fine.
 
-- **A CPU that sleeps.** Everything is event-driven; there is no `loop()` spinning between packets.
 - **Self-tuning retransmit timing.** Repeaters measure how crowded their neighbourhood is and space their
   retransmits to match, instead of using fixed `txdelay` values. ([ADR 0007](docs/adr/0007-adaptive-contention-window.md))
 - **Adaptive listen-before-talk.** Channel-activity detection calibrates itself to the local noise.
   ([ADAPTIVE_CAD.md](docs/ADAPTIVE_CAD.md))
-- **Optional RX duty cycle.** The radio naps between preamble checks to cut receive current, on radios
-  that support it. ([ADR 0006](docs/adr/0006-sx126x-rx-duty-cycle-and-busy-gating.md))
+- **Optional RX duty cycle.** The radio chip itself naps between preamble checks to cut receive current,
+  on radios that support it. ([ADR 0006](docs/adr/0006-sx126x-rx-duty-cycle-and-busy-gating.md))
 - **Mesh time sync.** Nodes without GPS can agree on the time. Off by default.
   ([MESHTIMESYNC.md](docs/MESHTIMESYNC.md))
-- **WiFi firmware updates** for ESP32 repeaters, so the node on the roof can stay on the roof.
+- **An observer role.** A listen-only node that publishes everything it hears to MQTT over WiFi (ESP32).
+- **MQTT uplink on a repeater.** An ESP32 repeater can report what it hears to MQTT over WiFi while it
+  keeps repeating.
+- **LEDs you control.** Turn them all off with `set leds off`, or choose what each one shows: blink on
+  transmit, on receive or both, and a heartbeat that can signal unread messages. The receive blink tells
+  you at a glance whether a repeater is hearing anything.
+- **2.4 GHz on LR2021 boards.** Set a 2.4 GHz frequency and the radio switches to its high-band path on
+  its own.
 - **Runs on Linux too.** The same code runs as a normal process on a Raspberry Pi or Femtofox with a real
   SX1262 attached. ([LINUX_NATIVE.md](docs/LINUX_NATIVE.md))
-- **Newer radios.** LR1110 and LR2021 alongside SX126x and SX127x.
 
 ## Hardware
 
diff --git a/zephcore/adapters/datastore/ZephyrDataStore.cpp b/zephcore/adapters/datastore/ZephyrDataStore.cpp
index 458ee01..04b350c 100644
--- a/zephcore/adapters/datastore/ZephyrDataStore.cpp
+++ b/zephcore/adapters/datastore/ZephyrDataStore.cpp
@@ -252,7 +252,7 @@ bool ZephyrDataStore::hasPrefs() const
  * causing settings_load() to hang and blocking bt_enable(). */
 void ZephyrDataStore::formatNVSOnly()
 {
-#if FIXED_PARTITION_EXISTS(storage_partition)
+#if PARTITION_EXISTS(storage_partition)
 	const struct flash_area *fap;
 	int rc = flash_area_open(PARTITION_ID(storage_partition), &fap);
 	if (rc == 0) {
diff --git a/zephcore/adapters/datastore/ZephyrFsFormat.c b/zephcore/adapters/datastore/ZephyrFsFormat.c
index 094f4ff..abec2c1 100644
--- a/zephcore/adapters/datastore/ZephyrFsFormat.c
+++ b/zephcore/adapters/datastore/ZephyrFsFormat.c
@@ -37,7 +37,7 @@ static void flatten(uint8_t id, const char *tag)
 	flash_area_close(fap);
 }
 
-#if FIXED_PARTITION_EXISTS(qspi_storage_partition)
+#if PARTITION_EXISTS(qspi_storage_partition)
 /* qspi-ext.dtsi makes the flash under /ext zephyr,deferred-init, so nothing
  * probes it at boot. The flash sits behind a GPIO-switched rail on several
  * boards, and the boot-time JEDEC read went out before a cold rail had come
@@ -49,7 +49,7 @@ static void flatten(uint8_t id, const char *tag)
  * earlier call already ran the init, whatever the result was. */
 static void ext_flash_init(void)
 {
-	const struct device *dev = FIXED_PARTITION_DEVICE(qspi_storage_partition);
+	const struct device *dev = PARTITION_DEVICE(qspi_storage_partition);
 
 	if (!device_is_ready(dev)) {
 		int rc = device_init(dev);
@@ -108,17 +108,17 @@ bool zephcore_fs_format_all(bool *out_ext_mounted)
 	fs_unmount(&FS_FSTAB_ENTRY(DT_NODELABEL(qspi_lfs)));
 #endif
 
-#if FIXED_PARTITION_EXISTS(lfs_partition)
+#if PARTITION_EXISTS(lfs_partition)
 	flatten(PARTITION_ID(lfs_partition), "lfs_partition");
 #endif
 
-#if FIXED_PARTITION_EXISTS(storage_partition)
+#if PARTITION_EXISTS(storage_partition)
 	/* BLE bonds (NVS).  A factory reset should clear them too; the caller
 	 * reboots so NVS and the BT stack re-init clean. */
 	flatten(PARTITION_ID(storage_partition), "storage_partition");
 #endif
 
-#if FIXED_PARTITION_EXISTS(qspi_storage_partition)
+#if PARTITION_EXISTS(qspi_storage_partition)
 	/* A repeater never mounts /ext, so its flash is still uninitialised. */
 	ext_flash_init();
 	flatten(PARTITION_ID(qspi_storage_partition), "qspi_storage_partition");
diff --git a/zephcore/tools/formatter/boards/thinknode_m6/board.overlay b/zephcore/tools/formatter/boards/thinknode_m6/board.overlay
index 1a39716..ca6d5e2 100644
--- a/zephcore/tools/formatter/boards/thinknode_m6/board.overlay
+++ b/zephcore/tools/formatter/boards/thinknode_m6/board.overlay
@@ -5,7 +5,7 @@
  * chip fitted, so the board dropped &qspi, its partition, the P0.21 enable
  * regulator and the qspi-ext.dtsi (/ext) include together (see the note in
  * thinknode_m6.dts).  There is therefore no /ext LittleFS instance to drop
- * and no QSPI enable to hog here; main.c's FIXED_PARTITION_EXISTS() checks
+ * and no QSPI enable to hog here; main.c's PARTITION_EXISTS() checks
  * simply skip the QSPI erase.  If the board ever restores QSPI, restore the
  * "/delete-node/ &qspi_lfs;" and the P0.21 hog that used to live here.
  *
diff --git a/zephcore/tools/formatter/src/main.c b/zephcore/tools/formatter/src/main.c
index 57112dc..990bd4c 100644
--- a/zephcore/tools/formatter/src/main.c
+++ b/zephcore/tools/formatter/src/main.c
@@ -8,7 +8,7 @@
  *   - SDv6: covers RAK4631, ThinkNode M1/M3/M6, ProMicro LR2021, RAK WisMesh Tag
  *   - SDv7: covers T1000-E, Wio Tracker L1, Ikoka Nano 30dBm
  *
- * Internal flash uses DTS FIXED_PARTITION_EXISTS — partition layout is identical
+ * Internal flash uses DTS PARTITION_EXISTS — partition layout is identical
  * across all boards with the same SoftDevice version.
  *
  * QSPI external flash uses bare-metal register probing (qspi_probe.c) — no
@@ -108,15 +108,15 @@ int main(void)
 	led_on();
 
 	/* ── LittleFS partition (all platforms) ── */
-#if FIXED_PARTITION_EXISTS(lfs_partition)
-	if (erase_partition(FIXED_PARTITION_ID(lfs_partition), "LittleFS (/lfs)")) {
+#if PARTITION_EXISTS(lfs_partition)
+	if (erase_partition(PARTITION_ID(lfs_partition), "LittleFS (/lfs)")) {
 		errors++;
 	}
 #endif
 
 	/* ── NVS storage partition (ESP32 etc.) ── */
-#if FIXED_PARTITION_EXISTS(storage_partition)
-	if (erase_partition(FIXED_PARTITION_ID(storage_partition), "NVS (storage)")) {
+#if PARTITION_EXISTS(storage_partition)
+	if (erase_partition(PARTITION_ID(storage_partition), "NVS (storage)")) {
 		errors++;
 	}
 #endif