diff --git a/ROADMAP.md b/ROADMAP.md
index 5e0b06d..5abbfb3 100644
--- a/ROADMAP.md
+++ b/ROADMAP.md
@@ -101,6 +101,18 @@ external interfaces. See `docs/architecture/structure.canvas` → *Backend – M
       that gets updated costs one retry rather than a reconfiguration. The
       payload is identical across both, so only the transport moved. Verified
       against one unit of each generation, read and command
+- [x] The aircon rig covers both units and both firmware generations: one
+      `wfrac` node each in `aircon_control`, polling as well as commanding, so
+      the panel shows what a unit answers next to what was asked of it. Three
+      things had to be fixed before a panel could actually drive one. The
+      seeded `commands` catch is off, which is the usual reason a fresh panel
+      looks dead — `AIRCON_COMMANDS=1` arms it at seed time. A unit that is off
+      names no mode and reports `unknown`, and a flow redelivers every bound
+      port on each run, so rejecting it made an idle unit impossible to start;
+      it now travels through untouched. And the old firmware serves one
+      connection at a time, answering an overlapping request with 501 — the
+      connector serialises per adapter and retries a busy one, which it must,
+      because other clients on the network are outside that lock
 - [x] Node lifecycle as a protocol (`start`/`stop`/`report_health` on `Node`),
       replacing the controller's per-type isinstance chains — the same hooks a
       connector implements, validated on the built-in nodes first