Phase 843: runGuildMeshQuadEmojiJourney and meshQuadEmojisReady

Four-peer custom emoji fanout contract extends Phase 802 triple emoji slice.

Co-authored-by: Cursor <[email protected]>

README.md

@@ -2,6 +2,8 @@
 
 Agent control plane for Pearcord — send the same IPC messages the UI sends, read `view` snapshots, and run scripted journeys against a **live worker** or an in-process **headless** session.
 
+**Phase 843 (v0.8.810):** `runGuildMeshQuadEmojiJourney` (4-peer custom emoji). Bundle: `npm run test:ci-phase843`.
+
 **Phase 842 (v0.8.809):** `runGuildMeshQuadOfflineRecoveryJourney` (4-peer offline recovery). Bundle: `npm run test:ci-phase842`.
 
 **Phase 841 (v0.8.808):** `runGuildMeshQuadSyncHealthJourney` (4-peer sync health rail). Bundle: `npm run test:ci-phase841`.

assert.js

@@ -211,6 +211,17 @@ function matchView (view, spec) {
       if (view?.meshStabilityStats?.pushHalted) return false
       continue
     }
+    if (key === 'meshQuadEmojisReady') {
+      if (!expected) return true
+      const peers = Number(view?.stats?.peers) || 0
+      if (peers < 2) return false
+      const gid = view?.guild?.id
+      const rail = gid ? view.guildSyncHealthRail?.[gid] : null
+      if (rail?.meshBounded) return false
+      const hasCustom = (view?.guildEmojis || []).some((e) => e?.name && !e.builtin)
+      if (!hasCustom) return false
+      continue
+    }
     if (key === 'meshQuadUnreadReady') {
       if (!expected) return true
       const peers = Number(view?.stats?.peers) || 0

headless.js

@@ -8323,6 +8323,80 @@ class HeadlessSession {
     }
   }
 
+  /** Phase 843: 4-peer mesh — host custom emoji visible on all three guests. */
+  async runGuildMeshQuadEmojiJourney () {
+    const { connectGuildMeshQuad } = require('./mesh-helpers')
+    const token = `mesh843_${Date.now()}`
+    const base = path.join(os.tmpdir(), `pearcord-agentctl-emoji843-${Date.now()}`)
+    const host = new HeadlessSession({ storagePath: path.join(base, 'host') })
+    const guest1 = new HeadlessSession({ storagePath: path.join(base, 'guest1') })
+    const guest2 = new HeadlessSession({ storagePath: path.join(base, 'guest2') })
+    const guest3 = new HeadlessSession({ storagePath: path.join(base, 'guest3') })
+    await host.start()
+    await guest1.start()
+    await guest2.start()
+    await guest3.start()
+    try {
+      await host.registerUser({ username: 'emhost843', displayName: 'Emoji Host 843' })
+      await host.createGuild({ name: 'Emoji Quad 843', publicListing: false })
+      await host.wait({ mode: 'guild' }, 45000)
+      const invite = await host.platform.createInvite().catch(() => null)
+      const code = invite?.shareCode || invite?.code
+      if (!code) throw new Error('host invite missing')
+      await guest1.registerUser({ username: 'emguest843a', displayName: 'Emoji Guest 843a' })
+      await guest2.registerUser({ username: 'emguest843b', displayName: 'Emoji Guest 843b' })
+      await guest3.registerUser({ username: 'emguest843c', displayName: 'Emoji Guest 843c' })
+      await guest1.ipc({ type: 'join-invite', code })
+      await guest2.ipc({ type: 'join-invite', code })
+      await guest3.ipc({ type: 'join-invite', code })
+      await guest1.wait({ mode: 'guild' }, 45000)
+      await guest2.wait({ mode: 'guild' }, 45000)
+      await guest3.wait({ mode: 'guild' }, 45000)
+      await connectGuildMeshQuad(
+        host.platform,
+        guest1.platform,
+        guest2.platform,
+        guest3.platform,
+        55000
+      )
+      const quadWait = { meshQuadReady: true, membersMin: 4 }
+      await host.wait(quadWait, 30000)
+      await guest1.wait(quadWait, 30000)
+      await guest2.wait(quadWait, 30000)
+      await guest3.wait(quadWait, 30000)
+      await host.upsertGuildEmoji({ name: token, glyph: '🎭' })
+      for (const p of [host.platform, guest1.platform, guest2.platform, guest3.platform]) {
+        if (typeof p.requestGuildSyncFanout === 'function') {
+          p.requestGuildSyncFanout()
+        }
+      }
+      const emojiWait = {
+        meshQuadEmojisReady: true,
+        guildEmojiNamed: token
+      }
+      await guest1.wait(emojiWait, 90000)
+      await guest2.wait(emojiWait, 90000)
+      await guest3.wait(emojiWait, 90000)
+      const g1v = await guest1.refreshView()
+      const g2v = await guest2.refreshView()
+      const g3v = await guest3.refreshView()
+      const hit = (v) => (v.guildEmojis || []).find((e) => e.name === token)
+      if (!hit(g1v) || !hit(g2v) || !hit(g3v)) {
+        throw new Error('guest missing custom emoji on quad mesh')
+      }
+      return {
+        emojiName: token,
+        guest2Glyph: hit(g2v)?.glyph,
+        guest3Glyph: hit(g3v)?.glyph
+      }
+    } finally {
+      await host.close()
+      await guest1.close()
+      await guest2.close()
+      await guest3.close()
+    }
+  }
+
   /** Phase 829: 4-peer mesh — drop one guest, survivors stay synced, rejoin + recovery burst. */
   async runGuildMeshQuadChurnRejoinJourney () {
     const {