docs(runicnpc): 9e step 1 — dome stack 3 and the PopupNotifications banner (D326-D328)

D326: a blank dome stack is 3 (module only; the wire still defaults to 1).
D327: the recommended PopupNotifications banner ships as a paste block
(rust-link/INTEGRATION.md §2.4), from the installer (install and update) and
from the egg's install. D328: "at the plugin's defaults" is all or nothing.
PLAN_REDESIGNS §3's "until it is chosen by eye" closes; rust-link/INSTALL.md
says what the installer and the egg write, and that uninstall leaves it.
Code: Module-Rust#36, installer#39, Rust-Link#22.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01E14m6SuuY6i1vASFeGDBeY

modules/rust/PLAN_REDESIGNS.md

@@ -470,7 +470,10 @@ Built on `edge` as Rust-Plugins `feat/zones-domes`, Module-Rust `feat/zones-dome
 Green and Purple are the Twitch battle-royale spheres, which ZoneDomes itself says show only where they meet
 terrain or an object, so they read as a ring at the zone's edge. **The org lead chose the full dome as the
 default:** the step lists Standard first as "Full dome (shaded)", labels each colour for what it shows, and
-a `dome` sent without a `type` is Standard. The default stack is still 1, until it is chosen by eye.
+a `dome` sent without a `type` is Standard. **The default stack is 3** (D326, `runicnpc/PLAN.md`): the org
+lead chose it by eye at noon in RunicNPC's 9d player session, and the module sends it when the step's stack
+is blank. Steps saved with a blank stack draw 3 from their next run. The wire is unchanged: a `dome` sent
+without a `stack` still gets 1 from the bridge, and the module always sends one.
 
 **Compiled on both rigs, and the rig rows walked, 2026-09-29** (no player; the "file API outage" that
 morning was a Git Bash path-rewriting bug in the walk's own helper, not the rigs):
@@ -540,7 +543,8 @@ so the site refuses it until protocol 13 ships:
 - **The in-game rows, deferred by the org lead (2026-09-29) to the later in-game walk, with §5.7's:**
   - The flags hold for a player without the exemption and not for one with it.
   - The enter and leave messages arrive as chat and as a popup.
-  - The default stack is chosen by eye, in daylight and at night.
+  - ~~The default stack is chosen by eye, in daylight and at night.~~ Chosen at noon in RunicNPC's 9d
+    player session: 3 (D326).
 
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