diff --git a/wiki/Home.md b/wiki/Home.md
index e9476ef..876fbea 100644
--- a/wiki/Home.md
+++ b/wiki/Home.md
@@ -1,6 +1,6 @@
 # diffuser
 
-> **Reflects code as of `15cfb22` · regenerated `2026-05-11` via `npm run wiki:all`**
+> **Reflects code as of `8cc02ee` · regenerated `2026-05-11` via `npm run wiki:all`**
 > If this banner is stale, the page may be out of date. Treat as informative, not authoritative.
 
 ## 1. What this node is
@@ -147,6 +147,7 @@ What lands on Port 0. Composed in `Diffuser.getOutput()`, then delta-compressed
 ```mermaid
 flowchart TB
     subgraph editor["Node-RED editor form"]
+        f0[Zone number]
         f1[Element count]
         f2[Diffuser density]
         f3[Water height]
@@ -155,13 +156,17 @@ flowchart TB
         f6[Zone volume]
     end
     subgraph config["Domain config slice"]
+        c0[diffuser.number]
         c1[diffuser.elements]
         c2[diffuser.density]
         c3[diffuser.waterHeight]
         c4[diffuser.headerPressure]
         c5[diffuser.alfaFactor]
         c6[diffuser.zoneVolume]
+        c7["diffuser.localAtmPressure (hidden)"]
+        c8["diffuser.waterDensity (hidden)"]
     end
+    f0 --> c0
     f1 --> c1
     f2 --> c2
     f3 --> c3
@@ -172,13 +177,14 @@ flowchart TB
 
 | Form field | Config key | Default | Range | Where used |
 |---|---|---|---|---|
+| Zone number | `diffuser.number` | `1` | int ≥ 1 | node label (`name_N`) |
 | Element count | `diffuser.elements` | `1` | int ≥ 1 | per-element flow |
 | Diffuser density | `diffuser.density` | `2.4` | > 0 | OTR curve key |
 | Water height | `diffuser.waterHeight` | `0` | ≥ 0 (m) | static head + kg O₂/h |
 | Header pressure | `diffuser.headerPressure` | `0` | ≥ 0 (mbar) | air density correction |
 | Alpha factor | `diffuser.alfaFactor` | `0.7` | 0–1 | oxygen-transfer correction |
-| Local atm. pressure | `diffuser.localAtmPressure` | `1013.25` | > 0 (mbar) | density baseline |
-| Water density | `diffuser.waterDensity` | `997` | > 0 (kg/m³) | static head |
+| _(hidden default)_ | `diffuser.localAtmPressure` | `1013.25` | > 0 (mbar) | density baseline |
+| _(hidden default)_ | `diffuser.waterDensity` | `997` | > 0 (kg/m³) | static head |
 | Zone volume | `diffuser.zoneVolume` | `0` | ≥ 0 (m³) | `oZoneOtr` |
 
 ## 10. State chart
@@ -221,3 +227,5 @@ Screenshots under `wiki/_partial-screenshots/diffuser/` when produced. Docker co
 | 2 | Supplier specs are hard-coded inside `_loadSpecs()` (GVA / ELASTOX-R). A configurable supplier registry is pending. | `specificClass.js _loadSpecs` |
 | 3 | No typed `MeasurementContainer` emission — `oOtr` / `oZoneOtr` cannot be subscribed via the generic `ChildRouter` handshake. Parents must read Port 0 messages. | CONTRACT.md `## Events emitted` |
 | 4 | Warning / alarm thresholds are fixed (2 % / 10 % hysteresis); not yet config-driven. | `configure()` literals |
+| 5 | **Node category mismatch:** `diffuser.html` registers under `category: 'wbd typical'` instead of `'EVOLV'`. All other platform nodes target `'EVOLV'` for consistent palette grouping in the editor. | `diffuser.html` line 3 |
+| 6 | **S88 colour — resolved:** `diffuser.html` already declares `color: '#86bbdd'` (Equipment Module). The WIKI_TEMPLATE §16 note listing diffuser as having "no colour set" is stale and can be removed in the next template refresh. | `diffuser.html` line 4 |