diff --git a/AUDIT.md b/AUDIT.md
index 3f4e34e..e7ddc68 100644
--- a/AUDIT.md
+++ b/AUDIT.md
@@ -206,3 +206,22 @@ resets the relay's `last_changed`, so continuity cannot be verified anyway).
 **Verification.** `sh scripts/check.sh` passes in both test environments (pip
 check, 65 offline tests, 18 HA Core tests, compilation, package/translation/changelog
 checks, `git diff --check`). The offline tests also pass on Python 3.9.6.
+
+
+## 0.2.3 — stale-room policy
+
+Decided by the user: pausing everything because one room sensor is unusable is
+not acceptable for future control. An unusable room is now left out and the other
+rooms' weights re-normalized; an opt-in checkbox keeps a stale sensor's last value
+for sensors that report only on change. Two safeguards were added: the keep-last
+option stops after 24 hours without a report, and Status exposes `excluded_rooms`
+and `weight_coverage`, so a forecast based on a small share of the comfort weight
+is visible.
+
+Open for the control design: a minimum `weight_coverage` below which the MPC must
+not decide, and the outdoor-temperature outage policy (still pauses). Simulated
+two-hour bedroom outage: the other room kept learning (7 → 25 samples, previously
+frozen at 7) and the bedroom resumed one poll after reporting again.
+
+**Verification.** `sh scripts/check.sh` passes for HA 2025.12.0 and 2026.2.3 (69
+offline tests, 18 HA Core tests). The offline tests also pass on Python 3.9.6.
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 94bb095..acbcee2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,7 +2,38 @@
 
 Engineering findings and test evidence behind each change are in [AUDIT.md](AUDIT.md).
 
-## 0.2.2 — 2026-10-26
+## 0.2.3 — 2026-10-26
+
+A stale or failed room sensor no longer pauses the whole integration. Still
+**observation-only**. Upgrading from 0.2.1 (0.2.2 was not deployed): follow the
+0.2.2 upgrade notes below as well.
+
+### Changed
+
+- A room sensor that is stale, unavailable, missing or invalid is now **left out**
+  instead of pausing everything: the weighted temperature, learning and forecasts
+  continue with the other rooms, whose comfort weights are re-normalized. Learning
+  and forecasts pause only if no room is usable, or if the relay, thermostat or
+  outdoor temperature is missing. Readiness considers only the rooms used.
+
+### Added
+
+- Checkbox **Keep using the last value of a room sensor that stopped reporting**
+  (setup and Configure, default off), for sensors that report only when the value
+  changes. A stale sensor's last value is then still used, for up to 24 hours
+  without a report. Unavailable or invalid sensors are always left out.
+- Status attributes `excluded_rooms` and `weight_coverage` (share of the total
+  comfort weight covered by the rooms used), and a per-room `used` flag in
+  `input_quality`.
+
+### Upgrade notes
+
+- The new checkbox appears in **Configure**; existing installations start with it
+  off. If a room is often listed in `excluded_rooms` while its temperature is
+  steady, either raise that room's report-age limit or turn the checkbox on.
+- Rollback to 0.2.2 or 0.2.1 is safe; older versions ignore the new setting.
+
+## 0.2.2 — 2026-10-26 (not deployed)
 
 Reliability release (Milestone 0). Still **observation-only**: the integration never
 calls the relay, the thermostat or any other service. No new options or UI text;
diff --git a/README.md b/README.md
index f0c1ba7..fb14bc8 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,4 @@
-# Heating MPC 0.2.2 — custom integration for Home Assistant OS
+# Heating MPC 0.2.3 — custom integration for Home Assistant OS
 
 **Experimental, observation-only (shadow mode).** It **never** changes the Generic Thermostat, the physical relay, the boiler's setpoint, `heat/off`, or Comfort/Away/Sleep. No Docker add-on, MQTT or InfluxDB connection is needed.
 
diff --git a/ROADMAP.md b/ROADMAP.md
index 9c16ec5..f773976 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -10,7 +10,7 @@ Success means predictable comfort, understandable decisions, safe operation and
 
 ## Current baseline — v0.2.1
 
-> **Current release: 0.2.2** — Milestone 0 reliability work on top of this
+> **Current release: 0.2.3** — Milestone 0 reliability work on top of this
 > baseline; see [CHANGELOG.md](CHANGELOG.md). The lists below describe 0.2.1.
 
 **Implemented (experimental):**
@@ -165,12 +165,15 @@ Only after the Milestone 3 gate has been satisfied:
 
 Items 1–3 of the original backlog are done (see AUDIT.md and CHANGELOG.md 0.2.2).
 
-1. **HAOS acceptance of 0.2.2 by the user:** install, restart, options reload, room
-   removal and re-adding, manual heat/off, a missing sensor, uninstall on a
-   disposable entry; confirm Generic Thermostat behavior is unchanged.
-2. Finish Milestone 0: decide the stale-room policy (pause all rooms, as now, or
-   keep learning healthy rooms); committed rollback/migration fixtures; failed-fit
-   counters; lint/type checks; remote CI run.
+1. **HAOS acceptance of 0.2.3 by the user:** install, restart, options reload, room
+   removal and re-adding, manual heat/off, a stale and an unavailable room sensor
+   (with the keep-last-value checkbox off and on), uninstall on a disposable
+   entry; confirm Generic Thermostat behavior is unchanged.
+2. Finish Milestone 0: committed rollback/migration fixtures; failed-fit counters;
+   lint/type checks; remote CI run. Stale-room policy decided in 0.2.3 (leave the
+   room out, or optionally keep its last value for up to 24 hours). Before live
+   control, decide a minimum `weight_coverage` and the outdoor-temperature outage
+   policy, which still pauses.
 3. Milestone 1: record forecasts with their input snapshot and evaluate them
    walk-forward at 15/30/60/120 minutes against persistence, replaying the actual
    relay sequence; then expose trajectories for a dashboard.
diff --git a/custom_components/heating_mpc/manifest.json b/custom_components/heating_mpc/manifest.json
index 84c20f8..592f529 100644
--- a/custom_components/heating_mpc/manifest.json
+++ b/custom_components/heating_mpc/manifest.json
@@ -9,5 +9,5 @@
   "iot_class": "local_polling",
   "requirements": [],
   "single_config_entry": true,
-  "version": "0.2.2"
+  "version": "0.2.3"
 }