feat(engagement): sixteen in-universe bodies, 25 seeded rules, the governor's letter (Phase 11b)

11a declared the triggers; this is the content behind them. Ships through
core's new api.registerEngagementSeeds (MODULE_API 1.9.0): 32 templates and 25
rules, every rule enabled = 0.

THE VOICE (decision 8). The game-powered families read from inside Britannia,
with a per-family in-fiction sender rather than one voice across all sixteen —
Lord Blackthorn's court writes about the crown's business (the seat, the ballot)
and nothing else, because a shard where Blackthorn writes to you personally about
a champion spawn is a shard where the letter about your governorship means
nothing. The Office of Deeds has houses, the Merchants' Guild vendors, a herald
guilds, the town crier champion spawns, a guildmaster skills and quests, the
Chronicler deaths, the keeper of the rolls leaderboards.

WHAT STAYS PLAIN (decision 9). Nine of the 25 point at core's notify.event /
inapp.event and author nothing, and the line is drawn where fiction costs
something real: a failed-login notice written as "a stranger sought entry to thy
account" is indistinguishable in register from the phishing mail it warns about,
and a moderator reading uo.cheat.detected at 2am wants a name, a rule and a
timestamp rather than a scroll. Both account-security triggers, server up/down,
and the five staff/admin-ceiling ones.

THE GOVERNOR'S LETTER (decision 10) — uo.governor.appointed, the 25th trigger.
§8.6 records that uo.points.rank_changed cannot address a person because top[]
names a mobile serial, and the same reasoning was silently assumed to cover the
governor. It does not: city.update's `governor` is written by BridgeJson.Actor(),
which emits serial, name, acct AND webId. The winner is addressable today with no
protocol change. It fires from the same frame, the same transition and the same
never-on-first-sight guard as uo.governor.elected, which stays exactly as
declared — the town's bulletin and the governor's letter are two triggers because
one trigger means one rule means one template, and they are not the same text.
An operator can run either alone.

PRESENTATIONAL FRAGMENTS, because a template has no conditionals by design and an
unset optional interpolates to the empty string. Phase 5a's `forWhom` precedent:
the ternary stays in the mapper and its result arrives as a declared optional.
Two shapes — a LABEL always has a value and carries a sentence's spine
(houseLabel falls back to a seal number); a TRAILING FRAGMENT may be empty and
leads with its own space, so `{{slainBy}}.` closes as "has fallen." either way.
Additive, so no version bump.

A render sweep over all 32 bodies, twice — once with every declared example and
once with required variables only — is what found these. Three defects it caught:
an optional `{{region}}` in a subject line ("A notice concerning thy house at ");
multi-optional ledger lines rendering "On hand:  gold. Charged each period:
gold." on a pre-v5 frame, now assembled in the mapper from the parts actually
present, the same argument place() already makes; and a leading trailing-fragment
opening a body with a stray space.

The labels stay `required: false` deliberately — a missing one must never REFUSE
an emit, since a dropped notification is worse than a cosmetic hole — so nothing
at runtime would notice a mapper that forgot one. engagementSeeds.test.js is what
notices.

524 module tests green; check:imports and check:bundle clean. check:swagger
reports STALE from CRLF alone and regenerates byte-identical — no route changed.

Refs docs ENGAGEMENT.md Phase 11b, decisions 8, 9, 10.

Co-Authored-By: Claude <noreply@anthropic.com>

server/index.js

@@ -46,6 +46,7 @@ module.exports = function register(ctx, api) {
   const shardStreams = require('./config/shardStreams')
   const shardTriggers = require('./config/shardTriggers')
   const shardAudiences = require('./config/shardAudiences')
+const engagementSeeds = require('./config/engagementSeeds')
   const townCrierLeg = require('./utils/shardAnnounce')
   const teamProvider = require('./model/teamProvider/teamProvider.model')
   const guildCommand = require('./commands/guild.command')
@@ -115,6 +116,28 @@ module.exports = function register(ctx, api) {
   // and registration must not (§2.2 rule 1).
   api.registerAudiences(shardAudiences.AUDIENCES)
 
+  // What this module SHIPS behind those two (MODULE_API 1.9.0, ENGAGEMENT.md
+  // Phase 11b): sixteen in-universe message bodies on two channels each, and
+  // twenty-five rules — every one of them `enabled = 0`, which the registry
+  // enforces rather than trusts.
+  //
+  // **A catalogue an operator turns on, not a switch that fires on upgrade.**
+  // Nothing here mails anybody: a rule that is off produces nothing, and a rule
+  // that is on still passes the ceiling, the per-user preference, the suppression
+  // list and the verification gate before anything is sent — all of them core's.
+  //
+  // The nine security and operational triggers point at core's generic bodies
+  // (decision 9). A cheat report should read like a cheat report.
+  //
+  // ONE rule group, and the choice is deliberate: a group is seeded once, so a
+  // twenty-sixth rule appended to `triggers-v1` in a later version would reach
+  // fresh installs ONLY. A future trigger wants its own group key.
+  api.registerEngagementSeeds({
+    templates: engagementSeeds.TEMPLATES,
+    ruleGroups: engagementSeeds.RULE_GROUPS,
+  })
+
+
   // Teams: a UO guild is a Team, and this module is the authoritative source of
   // them for this deployment (MODULE_API 1.6.0). Core asks the three questions;
   // everything about what a guild IS stays here.