diff --git a/frontend/src/App.vue b/frontend/src/App.vue
index 3ab0ea4..eadfe3e 100644
--- a/frontend/src/App.vue
+++ b/frontend/src/App.vue
@@ -41,12 +41,14 @@ import {
   notifyBossMessage,
   playSprintComplete,
   playAgentSignatureChime,
-  playActivityTick,
   playBlockedAlert,
   playAgentSpawn,
   playMentionPing,
   playPRShipped,
   playCollaborationChord,
+  playAgentMoodActive,
+  playAgentMoodIdle,
+  playAgentTick,
   resetAgentChimes,
 } from '@/composables/useNotifications'
 import { useConfetti } from '@/composables/useConfetti'
@@ -717,6 +719,8 @@ function scheduleSpacesReload(delayMs = 1000) {
 
 function setupSSE() {
   sse.on('agent_updated', (data) => {
+    // Capture prevStatus BEFORE the in-place patch so mood/alert transitions fire correctly.
+    const prevStatus = currentSpace.value?.agents[data.agent]?.status
     // Patch agent in-place immediately for instant UI feedback — no HTTP round-trip.
     // SSE payload has status+summary; schedule a debounced full reload for
     // items/questions/blockers that aren't included in the SSE payload.
@@ -740,13 +744,18 @@ function setupSSE() {
     checkSprintComplete()
     // Agent signature chime — plays once per agent per page load on first update
     playAgentSignatureChime(data.agent)
-    // Dissonance alert — plays when agent transitions into blocked or error state
-    if ((data.status === 'blocked' || data.status === 'error')) {
-      const prev = currentSpace.value?.agents[data.agent]?.status
-      if (prev !== 'blocked' && prev !== 'error') playBlockedAlert()
+    // Dissonance alert — fires when transitioning INTO blocked/error (not already there)
+    if ((data.status === 'blocked' || data.status === 'error')
+        && prevStatus !== 'blocked' && prevStatus !== 'error') {
+      playBlockedAlert()
     }
-    // Activity tick — subtle ambient sound for busy server-room feel (opt-in)
-    playActivityTick()
+    // Agent moods (#5): ascending voice on going active, descending on going idle
+    if (prevStatus && prevStatus !== data.status) {
+      if (data.status === 'active') playAgentMoodActive(data.agent)
+      else if (data.status === 'idle' && prevStatus === 'active') playAgentMoodIdle(data.agent)
+    }
+    // Activity tick — agent-tuned pentatonic micro-tone (#7 Heartbeat Mode)
+    playAgentTick(data.agent)
     statusAnnouncement.value = `Agent ${data.agent} updated: ${data.status}`
     pushLog('agent_updated', `[${data.agent}] ${data.status}: ${data.summary}`)
   })
diff --git a/frontend/src/components/KanbanView.vue b/frontend/src/components/KanbanView.vue
index eaaf632..36dd853 100644
--- a/frontend/src/components/KanbanView.vue
+++ b/frontend/src/components/KanbanView.vue
@@ -150,7 +150,7 @@ async function onTaskDrop(taskId: string, newStatus: TaskStatus) {
   try {
     const updated = await api.moveTask(props.space.name, taskId, newStatus)
     Object.assign(task, updated)
-    if (newStatus === 'done') { celebrate(undefined, undefined, (task.priority ?? 'medium') as ConfettiPriority); playSuccess() }
+    if (newStatus === 'done') { celebrate(undefined, undefined, (task.priority ?? 'medium') as ConfettiPriority); playSuccess(task.priority ?? 'medium') }
     else { playTaskTransition(newStatus) }
   } catch {
     // Revert on error
@@ -239,7 +239,7 @@ const unsubTaskUpdated = sse.on('task_updated', (data) => {
   const existing = tasks.value.find(t => t.id === data.id)
   if (data.status === 'done' && existing && existing.status !== 'done') {
     celebrate(undefined, undefined, (existing.priority ?? 'medium') as ConfettiPriority)
-    playSuccess()
+    playSuccess(existing.priority ?? 'medium')
   } else if (data.status && data.status !== existing?.status && data.status !== 'done') {
     playTaskTransition(data.status)
   }
diff --git a/frontend/src/composables/useNotifications.ts b/frontend/src/composables/useNotifications.ts
index e67e3a7..a57f477 100644
--- a/frontend/src/composables/useNotifications.ts
+++ b/frontend/src/composables/useNotifications.ts
@@ -159,35 +159,53 @@ export function playChime(): void {
   }
 }
 
-// Task-done success chord
-export function playSuccess(): void {
+// Task-done success chord.
+// priority='critical' (#4 Boss Level): adds an ascending run before the chord for extra fanfare.
+export function playSuccess(priority?: string): void {
   if (!isCategoryEnabled('celebrations')) return
+  const isCritical = priority === 'critical'
   try {
     const ctx = new AudioContext()
     const t = ctx.currentTime
     const theme = soundTheme.value
+    // Critical-priority head-start: ascending run (C5→G5→C6) gives a "Boss Level" feeling
+    const offset = isCritical ? 0.38 : 0
+    if (isCritical && !prefersReducedMotion) {
+      if (theme === 'retro') {
+        tone(ctx, 523,  t,        0.09, effectiveVolume(0.065), 'square')
+        tone(ctx, 784,  t + 0.10, 0.09, effectiveVolume(0.065), 'square')
+        tone(ctx, 1047, t + 0.22, 0.1,  effectiveVolume(0.075), 'square')
+      } else if (theme === 'space') {
+        sweep(ctx, 300, 1400, t, 0.32, effectiveVolume(0.07), 'sine')
+      } else {
+        // Classic/Nature: short C5→G5→C6 arpeggio lead-in
+        const wave: OscillatorType = theme === 'nature' ? 'triangle' : 'sine'
+        tone(ctx, 523.25, t,        0.12, effectiveVolume(0.055), wave)
+        tone(ctx, 783.99, t + 0.13, 0.12, effectiveVolume(0.055), wave)
+        tone(ctx, 1046.5, t + 0.26, 0.1,  effectiveVolume(0.065), wave)
+      }
+    }
 
     if (theme === 'retro') {
-      // Chiptune ascending arpeggio
-      tone(ctx, 262, t,        0.12, 0.07, 'square') // C4
-      tone(ctx, 330, t + 0.10, 0.12, 0.07, 'square') // E4
-      tone(ctx, 392, t + 0.20, 0.12, 0.07, 'square') // G4
-      tone(ctx, 523, t + 0.30, 0.22, 0.09, 'square') // C5 held
+      tone(ctx, 262, t + offset,        0.12, 0.07, 'square') // C4
+      tone(ctx, 330, t + offset + 0.10, 0.12, 0.07, 'square') // E4
+      tone(ctx, 392, t + offset + 0.20, 0.12, 0.07, 'square') // G4
+      tone(ctx, 523, t + offset + 0.30, 0.22, 0.09, 'square') // C5 held
     } else if (theme === 'space') {
-      sweep(ctx, 400,  800,  t,        0.15, 0.07, 'sine')
-      sweep(ctx, 800,  1200, t + 0.18, 0.25, 0.08, 'sine')
+      sweep(ctx, 400,  800,  t + offset,        0.15, 0.07, 'sine')
+      sweep(ctx, 800,  1200, t + offset + 0.18, 0.25, 0.08, 'sine')
     } else if (theme === 'nature') {
-      tone(ctx, 523.25, t,        0.6,  0.05, 'triangle') // C5
-      tone(ctx, 659.25, t + 0.12, 0.55, 0.05, 'triangle') // E5
-      tone(ctx, 783.99, t + 0.24, 0.5,  0.05, 'triangle') // G5
+      tone(ctx, 523.25, t + offset,        0.6,  0.05, 'triangle') // C5
+      tone(ctx, 659.25, t + offset + 0.12, 0.55, 0.05, 'triangle') // E5
+      tone(ctx, 783.99, t + offset + 0.24, 0.5,  0.05, 'triangle') // G5
     } else {
       // Classic: C major triad (C5, E5, G5)
-      tone(ctx, 523.25, t,        0.5)  // C5
-      tone(ctx, 659.25, t + 0.08, 0.45) // E5
-      tone(ctx, 783.99, t + 0.16, 0.4)  // G5
+      tone(ctx, 523.25, t + offset,        0.5)  // C5
+      tone(ctx, 659.25, t + offset + 0.08, 0.45) // E5
+      tone(ctx, 783.99, t + offset + 0.16, 0.4)  // G5
     }
 
-    setTimeout(() => ctx.close(), 1500)
+    setTimeout(() => ctx.close(), isCritical ? 2000 : 1500)
   } catch {
     // AudioContext not available
   }
@@ -321,6 +339,20 @@ export function playActivityTick(): void {
   }
 }
 
+// ── #7 Heartbeat Mode — agent-personality tick ─────────────────────────────
+// Each agent's tick is a 3ms micro-tone at their pentatonic frequency instead
+// of uniform white noise. Active fleets sound like a chord of working agents.
+export function playAgentTick(agentName: string): void {
+  if (!activityTickEnabled.value) return
+  try {
+    const ctx = new AudioContext()
+    const t = ctx.currentTime
+    const freq = PENTATONIC_HZ[hashName(agentName) % PENTATONIC_HZ.length]!
+    tone(ctx, freq, t, 0.003, 0.008 * soundVolume.value, 'sine') // 3ms micro-tone
+    setTimeout(() => ctx.close(), 100)
+  } catch { /* AudioContext not available */ }
+}
+
 // ── Reduced-motion awareness ────────────────────────────────────────────────
 const prefersReducedMotion = window.matchMedia('(prefers-reduced-motion: reduce)').matches
 
@@ -432,3 +464,36 @@ export function playCollaborationChord(senderName: string, receiverName: string)
     setTimeout(() => ctx.close(), 600)
   } catch { /* AudioContext not available */ }
 }
+
+// ── #5 Agent Moods — status transition voice variants ─────────────────────
+// Each agent's pentatonic root frequency played in ascending or descending
+// intervals to convey "waking up" vs "settling down" — completing the arc.
+// Uses the same pentatonic hash so moods are tonally consistent with chimes.
+
+export function playAgentMoodActive(agentName: string): void {
+  if (!isCategoryEnabled('events')) return
+  try {
+    const ctx = new AudioContext()
+    const t = ctx.currentTime
+    const root = PENTATONIC_HZ[hashName(agentName) % PENTATONIC_HZ.length]!
+    const fifth = root * 1.498 // perfect fifth (3:2 ratio) — energizing, upward
+    // Ascending: root → fifth, short and punchy
+    tone(ctx, root,  t,       0.18, effectiveVolume(0.038), 'sine')
+    tone(ctx, fifth, t + 0.1, 0.16, effectiveVolume(0.038), 'triangle')
+    setTimeout(() => ctx.close(), 500)
+  } catch { /* AudioContext not available */ }
+}
+
+export function playAgentMoodIdle(agentName: string): void {
+  if (!isCategoryEnabled('events')) return
+  try {
+    const ctx = new AudioContext()
+    const t = ctx.currentTime
+    const root = PENTATONIC_HZ[hashName(agentName) % PENTATONIC_HZ.length]!
+    const fifth = root * 1.498
+    // Descending: fifth → root, slower and softer — "settling down"
+    tone(ctx, fifth, t,       0.22, effectiveVolume(0.028), 'triangle')
+    tone(ctx, root,  t + 0.13, 0.28, effectiveVolume(0.022), 'sine')
+    setTimeout(() => ctx.close(), 600)
+  } catch { /* AudioContext not available */ }
+}