diff --git a/src/blobbi/actions/hooks/useBlobbiDirectAction.ts b/src/blobbi/actions/hooks/useBlobbiDirectAction.ts
index 06e2149d..e96df240 100644
--- a/src/blobbi/actions/hooks/useBlobbiDirectAction.ts
+++ b/src/blobbi/actions/hooks/useBlobbiDirectAction.ts
@@ -18,8 +18,9 @@ import {
   DIRECT_ACTION_METADATA,
   type DirectAction,
 } from '../lib/blobbi-action-utils';
-import { trackMultipleDailyMissionActions, trackEvolutionMissionTally } from '../lib/daily-mission-tracker';
+import { trackMultipleDailyMissionActions, trackEvolutionMissionTally, readEvolutionFromStorage } from '../lib/daily-mission-tracker';
 import type { DailyMissionAction } from '../lib/daily-missions';
+import { serializeEvolutionContent } from '@/blobbi/core/lib/missions';
 import { getStreakTagUpdates } from '../lib/blobbi-streak';
 import { calculateActionXP, applyXPGain, formatXPGain } from '../lib/blobbi-xp';
 
@@ -150,9 +151,20 @@ export function useBlobbiDirectAction({
       const progressionState = canonical.companion.progressionState;
       const updatedTags = canonical.allTags;
       if (progressionState === 'incubating' || progressionState === 'evolving') {
-        trackEvolutionMissionTally('interactions', 1, user.pubkey);
+        trackEvolutionMissionTally('interactions', 1, user.pubkey, canonical.companion.d);
       }
       
+      // ─── Build content with latest evolution state ───
+      // Read the updated evolution from session store so the publish carries
+      // the latest progress, instead of relying on the debounce hook.
+      let content = canonical.content;
+      if (progressionState === 'incubating' || progressionState === 'evolving') {
+        const evo = readEvolutionFromStorage(user.pubkey, canonical.companion.d);
+        if (evo && evo.length > 0) {
+          content = serializeEvolutionContent(canonical.content, evo);
+        }
+      }
+
       // Get streak updates (will only update if needed based on day)
       const streakUpdates = getStreakTagUpdates(canonical.companion) ?? {};
       
@@ -172,7 +184,7 @@ export function useBlobbiDirectAction({
 
       const blobbiEvent = await publishEvent({
         kind: KIND_BLOBBI_STATE,
-        content: canonical.content,
+        content,
         tags: blobbiTags,
       });
 
diff --git a/src/blobbi/actions/hooks/useBlobbiIncubation.ts b/src/blobbi/actions/hooks/useBlobbiIncubation.ts
index 5775546e..419b1902 100644
--- a/src/blobbi/actions/hooks/useBlobbiIncubation.ts
+++ b/src/blobbi/actions/hooks/useBlobbiIncubation.ts
@@ -27,10 +27,11 @@ import {
   updateBlobbiTags,
 } from '@/blobbi/core/lib/blobbi';
 import { applyBlobbiDecay } from '@/blobbi/core/lib/blobbi-decay';
+import { serializeEvolutionContent } from '@/blobbi/core/lib/missions';
 import { createHatchMissions, createEvolveMissions } from '../lib/evolution-missions';
 import {
-  ensureSessionStore,
-  writeMissionsToStorage,
+  writeEvolutionToStorage,
+  clearEvolutionFromStorage,
 } from '../lib/daily-mission-tracker';
 
 // ─── Types ────────────────────────────────────────────────────────────────────
@@ -206,15 +207,21 @@ export function useStartIncubation({
             last_decay_at: nowStr,
           });
           
+          // Clear evolution from the other Blobbi's content
+          const otherContent = serializeEvolutionContent(otherEvent.content, []);
+
           // Publish the stop event for the other Blobbi
           const stopEvent = await publishEvent({
             kind: KIND_BLOBBI_STATE,
-            content: otherEvent.content,
+            content: otherContent,
             tags: otherNewTags,
           });
           
           // Update the cache for the stopped Blobbi
           updateCompanionEvent(stopEvent);
+
+          // Clear evolution session store for the stopped Blobbi
+          clearEvolutionFromStorage(user.pubkey, stopOtherD);
         }
       }
 
@@ -261,22 +268,22 @@ export function useStartIncubation({
         last_decay_at: nowStr,
       });
 
+      // ─── Build evolution content for 31124 ───
+      const hatchMissions = createHatchMissions();
+      const content = serializeEvolutionContent(canonical.content, hatchMissions);
+
       // ─── Publish Event ───
       const event = await publishEvent({
         kind: KIND_BLOBBI_STATE,
-        content: canonical.content,
+        content,
         tags: newTags,
       });
 
       updateCompanionEvent(event);
 
-      // ─── Populate evolution missions in session store ───
-      const currentMissions = ensureSessionStore(user.pubkey);
-      writeMissionsToStorage(
-        { ...currentMissions, evolution: createHatchMissions() },
-        user.pubkey,
-      );
-      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true } }));
+      // ─── Populate evolution missions in session store (per-Blobbi) ───
+      writeEvolutionToStorage(hatchMissions, user.pubkey, canonical.companion.d);
+      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true, d: canonical.companion.d } }));
 
       return {
         name: canonical.companion.name,
@@ -424,22 +431,21 @@ export function useStopIncubation({
         last_decay_at: nowStr,
       });
 
+      // ─── Clear evolution from 31124 content ───
+      const content = serializeEvolutionContent(canonical.content, []);
+
       // ─── Publish Event ───
       const event = await publishEvent({
         kind: KIND_BLOBBI_STATE,
-        content: canonical.content,
+        content,
         tags: newTags,
       });
 
       updateCompanionEvent(event);
 
       // ─── Clear evolution missions in session store ───
-      const currentMissions = ensureSessionStore(user.pubkey);
-      writeMissionsToStorage(
-        { ...currentMissions, evolution: [] },
-        user.pubkey,
-      );
-      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true } }));
+      clearEvolutionFromStorage(user.pubkey, canonical.companion.d);
+      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true, d: canonical.companion.d } }));
 
       return {
         name: canonical.companion.name,
@@ -557,22 +563,22 @@ export function useStartEvolution({
         last_decay_at: nowStr,
       });
 
+      // ─── Build evolution content for 31124 ───
+      const evolveMissions = createEvolveMissions();
+      const content = serializeEvolutionContent(canonical.content, evolveMissions);
+
       // ─── Publish Event ───
       const event = await publishEvent({
         kind: KIND_BLOBBI_STATE,
-        content: canonical.content,
+        content,
         tags: newTags,
       });
 
       updateCompanionEvent(event);
 
-      // ─── Populate evolution missions in session store ───
-      const currentMissions = ensureSessionStore(user.pubkey);
-      writeMissionsToStorage(
-        { ...currentMissions, evolution: createEvolveMissions() },
-        user.pubkey,
-      );
-      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true } }));
+      // ─── Populate evolution missions in session store (per-Blobbi) ───
+      writeEvolutionToStorage(evolveMissions, user.pubkey, canonical.companion.d);
+      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true, d: canonical.companion.d } }));
 
       return {
         name: canonical.companion.name,
@@ -705,22 +711,21 @@ export function useStopEvolution({
         last_decay_at: nowStr,
       });
 
+      // ─── Clear evolution from 31124 content ───
+      const content = serializeEvolutionContent(canonical.content, []);
+
       // ─── Publish Event ───
       const event = await publishEvent({
         kind: KIND_BLOBBI_STATE,
-        content: canonical.content,
+        content,
         tags: newTags,
       });
 
       updateCompanionEvent(event);
 
       // ─── Clear evolution missions in session store ───
-      const currentMissions = ensureSessionStore(user.pubkey);
-      writeMissionsToStorage(
-        { ...currentMissions, evolution: [] },
-        user.pubkey,
-      );
-      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true } }));
+      clearEvolutionFromStorage(user.pubkey, canonical.companion.d);
+      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true, d: canonical.companion.d } }));
 
       return {
         name: canonical.companion.name,
diff --git a/src/blobbi/actions/hooks/useBlobbiStageTransition.ts b/src/blobbi/actions/hooks/useBlobbiStageTransition.ts
index f9b8107f..b91917d4 100644
--- a/src/blobbi/actions/hooks/useBlobbiStageTransition.ts
+++ b/src/blobbi/actions/hooks/useBlobbiStageTransition.ts
@@ -27,19 +27,22 @@ import {
 } from '@/blobbi/core/lib/blobbi';
 import { applyBlobbiDecay } from '@/blobbi/core/lib/blobbi-decay';
 import { validateAndRepairBlobbiTags } from '@/blobbi/core/lib/blobbi-tag-schema';
+import { serializeEvolutionContent } from '@/blobbi/core/lib/missions';
+import { createEvolveMissions } from '../lib/evolution-missions';
+import { writeEvolutionToStorage, clearEvolutionFromStorage } from '../lib/daily-mission-tracker';
 import { getStreakTagUpdates } from '../lib/blobbi-streak';
 
 // ─── Content Helpers ──────────────────────────────────────────────────────────
 
 /**
  * Generate the content string for a Blobbi at a given stage.
- * Format: "{name} is a {stage} Blobbi."
- * 
- * Uses correct grammar: "an egg" vs "a baby/adult"
+ * Now stores JSON with an optional evolution array.
+ * Falls back to a descriptive JSON content when no evolution is active.
  */
-function generateBlobbiContent(name: string, stage: BlobbiStage): string {
-  const article = stage === 'egg' ? 'an' : 'a';
-  return `${name} is ${article} ${stage} Blobbi.`;
+function generateBlobbiContent(_name: string, _stage: BlobbiStage): string {
+  // Return empty JSON — evolution will be populated separately when needed.
+  // The old plain-text format ("Luna is an egg Blobbi.") is no longer used.
+  return JSON.stringify({});
 }
 
 // ─── Types ────────────────────────────────────────────────────────────────────
@@ -209,9 +212,13 @@ export function useBlobbiHatch({
         progression_started_at: nowStr,
       });
 
-      // ─── Generate New Content for Baby Stage ───
-      // CRITICAL: Content must reflect the new stage
-      const newContent = generateBlobbiContent(canonical.companion.name, 'baby');
+      // ─── Write evolution missions into 31124 content ───
+      // Baby auto-starts evolution, so seed the missions immediately.
+      const evolveMissions = createEvolveMissions();
+      const newContent = serializeEvolutionContent(
+        generateBlobbiContent(canonical.companion.name, 'baby'),
+        evolveMissions,
+      );
 
       // ─── Publish Event ───
       const event = await publishEvent({
@@ -222,6 +229,12 @@ export function useBlobbiHatch({
 
       updateCompanionEvent(event);
 
+      // ─── Seed evolution session store for immediate tally tracking ───
+      if (user?.pubkey) {
+        writeEvolutionToStorage(evolveMissions, user.pubkey, canonical.companion.d);
+        window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true, d: canonical.companion.d } }));
+      }
+
       return {
         previousStage: 'egg',
         newStage: 'baby',
@@ -360,9 +373,11 @@ export function useBlobbiEvolve({
         progression_state: 'none',
       });
 
-      // ─── Generate New Content for Adult Stage ───
-      // CRITICAL: Content must reflect the new stage
-      const newContent = generateBlobbiContent(canonical.companion.name, 'adult');
+      // ─── Clear evolution from 31124 content (progression complete) ───
+      const newContent = serializeEvolutionContent(
+        generateBlobbiContent(canonical.companion.name, 'adult'),
+        [],
+      );
 
       // ─── Publish Event ───
       const event = await publishEvent({
@@ -373,6 +388,11 @@ export function useBlobbiEvolve({
 
       updateCompanionEvent(event);
 
+      // ─── Clear evolution session store ───
+      if (user?.pubkey) {
+        clearEvolutionFromStorage(user.pubkey, canonical.companion.d);
+      }
+
       return {
         previousStage: 'baby',
         newStage: 'adult',
diff --git a/src/blobbi/actions/hooks/useBlobbiUseInventoryItem.ts b/src/blobbi/actions/hooks/useBlobbiUseInventoryItem.ts
index e7d6dbd7..83d16ea2 100644
--- a/src/blobbi/actions/hooks/useBlobbiUseInventoryItem.ts
+++ b/src/blobbi/actions/hooks/useBlobbiUseInventoryItem.ts
@@ -24,8 +24,9 @@ import {
   type InventoryAction,
   ACTION_METADATA,
 } from '../lib/blobbi-action-utils';
-import { trackMultipleDailyMissionActions, trackEvolutionMissionTally } from '../lib/daily-mission-tracker';
+import { trackMultipleDailyMissionActions, trackEvolutionMissionTally, readEvolutionFromStorage } from '../lib/daily-mission-tracker';
 import type { DailyMissionAction } from '../lib/daily-missions';
+import { serializeEvolutionContent } from '@/blobbi/core/lib/missions';
 import { getStreakTagUpdates } from '../lib/blobbi-streak';
 import { calculateInventoryActionXP, applyXPGain, formatXPGain } from '../lib/blobbi-xp';
 
@@ -244,9 +245,18 @@ export function useBlobbiUseInventoryItem({
       const progressionState = canonical.companion.progressionState;
       const updatedTags = canonical.allTags;
       if (progressionState === 'incubating' || progressionState === 'evolving') {
-        trackEvolutionMissionTally('interactions', 1, user?.pubkey);
+        trackEvolutionMissionTally('interactions', 1, user?.pubkey, canonical.companion.d);
       }
       
+      // ─── Build content with latest evolution state ───
+      let content = canonical.content;
+      if (progressionState === 'incubating' || progressionState === 'evolving') {
+        const evo = readEvolutionFromStorage(user?.pubkey, canonical.companion.d);
+        if (evo && evo.length > 0) {
+          content = serializeEvolutionContent(canonical.content, evo);
+        }
+      }
+
       // Get streak updates (will only update if needed based on day)
       const streakUpdates = getStreakTagUpdates(canonical.companion) ?? {};
       
@@ -265,7 +275,7 @@ export function useBlobbiUseInventoryItem({
 
       const blobbiEvent = await publishEvent({
         kind: KIND_BLOBBI_STATE,
-        content: canonical.content,
+        content,
         tags: blobbiTags,
       });
 
diff --git a/src/blobbi/actions/hooks/useDailyMissions.ts b/src/blobbi/actions/hooks/useDailyMissions.ts
index 169ae7ac..143a9a4d 100644
--- a/src/blobbi/actions/hooks/useDailyMissions.ts
+++ b/src/blobbi/actions/hooks/useDailyMissions.ts
@@ -1,7 +1,7 @@
 /**
  * useDailyMissions - Hook for reading daily mission state
  *
- * Provides reactive access to the current day's missions.
+ * Provides reactive access to the current day's daily missions.
  * Progress tracking is done via the tracker module (non-React).
  * Completion is implicit (derived from count/events vs target).
  * XP is awarded automatically when missions complete.
@@ -10,6 +10,9 @@
  * switch, hydrates from kind 11125 content JSON if the session store
  * is empty. Completed missions are persisted by `useAwardDailyXp`;
  * intermediate progress resets on page refresh.
+ *
+ * NOTE: Evolution missions are NOT managed here. They live on kind 31124
+ * (per-Blobbi) and are handled by the evolution session store.
  */
 
 import { useMemo, useEffect, useState, useCallback, useRef } from 'react';
@@ -34,9 +37,9 @@ import {
 } from '../lib/daily-missions';
 
 import {
-  readMissionsFromStorage,
-  writeMissionsToStorage,
-  hydrateFromPersisted,
+  readDailyFromStorage,
+  writeDailyToStorage,
+  hydrateDailyFromPersisted,
 } from '../lib/daily-mission-tracker';
 
 // ─── Types ────────────────────────────────────────────────────────────────────
@@ -66,7 +69,7 @@ export interface UseDailyMissionsOptions {
   /**
    * Raw content string from the kind 11125 profile event.
    * Pass `profile.content` here. The hook parses it to extract
-   * persisted missions and hydrates the session store on first load.
+   * persisted daily missions and hydrates the session store on first load.
    */
   profileContent?: string;
 }
@@ -113,32 +116,23 @@ export function useDailyMissions(options: UseDailyMissionsOptions = {}): UseDail
     if (hydratedRef.current === pubkey) return; // already hydrated this session
 
     // Check if session store already has data for this pubkey
-    const existing = readMissionsFromStorage(pubkey);
+    const existing = readDailyFromStorage(pubkey);
     if (existing) {
       hydratedRef.current = pubkey;
       return;
     }
 
-    // Parse persisted missions from profile content
+    // Parse persisted daily missions from profile content
     const parsed = parseProfileContent(profileContent);
     if (parsed.missions && !needsDailyReset(parsed.missions)) {
-      // Daily missions are still current — hydrate the full object
-      hydrateFromPersisted(parsed.missions, pubkey);
-    } else if (parsed.missions?.evolution?.length) {
-      // Daily missions need a reset, but evolution missions survive across days.
-      // Seed the store with fresh dailies + persisted evolution so the raw memo
-      // picks them up instead of creating missions with evolution: [].
-      const fresh = createDailyMissionsContent(
-        getTodayDateString(),
-        parsed.missions.evolution,
-        pubkey,
-        availableStages,
-      );
-      writeMissionsToStorage(fresh, pubkey);
+      // Daily missions are still current — hydrate
+      hydrateDailyFromPersisted(parsed.missions, pubkey);
     }
+    // If daily missions need a reset, the raw memo below will create fresh ones.
+
     hydratedRef.current = pubkey;
     setVersion((v) => v + 1);
-  }, [pubkey, profileContent]); // eslint-disable-line react-hooks/exhaustive-deps
+  }, [pubkey, profileContent]);
 
   // Listen for tracker events
   useEffect(() => {
@@ -152,11 +146,9 @@ export function useDailyMissions(options: UseDailyMissionsOptions = {}): UseDail
 
   // Read and ensure current state.
   // CRITICAL: Don't create a fresh store entry until hydration is complete.
-  // Creating one prematurely would overwrite persisted evolution missions
-  // because `hydrateFromPersisted` no-ops when the store already has data.
   const hydrated = hydratedRef.current === pubkey;
   const raw = useMemo((): MissionsContent | undefined => {
-    const stored = readMissionsFromStorage(pubkey);
+    const stored = readDailyFromStorage(pubkey);
 
     if (!needsDailyReset(stored)) return stored;
 
@@ -164,14 +156,13 @@ export function useDailyMissions(options: UseDailyMissionsOptions = {}): UseDail
     // hydration effect to seed persisted data before creating fresh missions.
     if (!stored && !hydrated) return undefined;
 
-    // Reset for new day, preserve evolution missions
+    // Reset for new day
     const fresh = createDailyMissionsContent(
       getTodayDateString(),
-      stored?.evolution ?? [],
       pubkey,
       availableStages,
     );
-    writeMissionsToStorage(fresh, pubkey);
+    writeDailyToStorage(fresh, pubkey);
     return fresh;
   // eslint-disable-next-line react-hooks/exhaustive-deps
   }, [version, pubkey, stagesKey, hydrated]);
@@ -203,14 +194,13 @@ export function useDailyMissions(options: UseDailyMissionsOptions = {}): UseDail
   const forceReset = useCallback(() => {
     const fresh = createDailyMissionsContent(
       getTodayDateString(),
-      raw?.evolution ?? [],
       pubkey,
       availableStages,
     );
-    writeMissionsToStorage(fresh, pubkey);
+    writeDailyToStorage(fresh, pubkey);
     setVersion((v) => v + 1);
   // eslint-disable-next-line react-hooks/exhaustive-deps
-  }, [pubkey, stagesKey, raw?.evolution]);
+  }, [pubkey, stagesKey]);
 
   return {
     missions,
diff --git a/src/blobbi/actions/hooks/useEvolveTasks.ts b/src/blobbi/actions/hooks/useEvolveTasks.ts
index 1e61cb04..4150395d 100644
--- a/src/blobbi/actions/hooks/useEvolveTasks.ts
+++ b/src/blobbi/actions/hooks/useEvolveTasks.ts
@@ -3,7 +3,7 @@
 /**
  * Hook to compute evolve task progress.
  *
- * Progress is stored in `MissionsContent.evolution[]` on kind 11125.
+ * Progress is stored in the kind 31124 Blobbi event content JSON (per-Blobbi).
  * - Interactions: TallyMission tracked via `trackEvolutionMissionTally`
  * - Event-based tasks: EventMission, backfilled from retroactive Nostr queries
  * - Dynamic task (maintain_stats): computed from current companion stats, NEVER stored
@@ -16,9 +16,14 @@ import type { NostrFilter } from '@nostrify/nostrify';
 
 import { useCurrentUser } from '@/hooks/useCurrentUser';
 import type { BlobbiCompanion } from '@/blobbi/core/lib/blobbi';
-import type { MissionsContent } from '@/blobbi/core/lib/missions';
+import type { Mission } from '@/blobbi/core/lib/missions';
 import { missionProgress, isEventMission } from '@/blobbi/core/lib/missions';
-import { trackEvolutionMissionEvent, readMissionsFromStorage, ensureSessionStore, writeMissionsToStorage } from '../lib/daily-mission-tracker';
+import {
+  trackEvolutionMissionEvent,
+  readEvolutionFromStorage,
+  writeEvolutionToStorage,
+  hydrateEvolutionFromPersisted,
+} from '../lib/daily-mission-tracker';
 import {
   EVOLVE_MISSIONS,
   EVOLVE_REQUIRED_INTERACTIONS,
@@ -80,45 +85,64 @@ export interface EvolveTasksResult {
  * Hook to compute evolve task progress from evolution missions + Nostr event backfill.
  *
  * @param companion - The Blobbi companion (must be in evolving state)
- * @param missions - Current MissionsContent from the session store
  */
 export function useEvolveTasks(
   companion: BlobbiCompanion | null,
-  missions: MissionsContent | undefined,
 ): EvolveTasksResult {
   const { user } = useCurrentUser();
   const { nostr } = useNostr();
 
   const pubkey = user?.pubkey;
+  const companionD = companion?.d;
   const isEvolving = companion?.progressionState === 'evolving';
-  const evolution = useMemo(() => missions?.evolution ?? [], [missions?.evolution]);
+
+  // Read evolution from session store or companion (31124 content)
+  const evolution = useMemo((): Mission[] => {
+    if (!pubkey || !companionD) return [];
+    const fromStore = readEvolutionFromStorage(pubkey, companionD);
+    if (fromStore && fromStore.length > 0) return fromStore;
+    return companion?.evolution ?? [];
+  }, [pubkey, companionD, companion?.evolution]);
+
+  // ─── Hydrate evolution store from companion on mount ───
+  const hydratedRef = useRef<string | null>(null);
+  useEffect(() => {
+    if (!isEvolving || !pubkey || !companionD) return;
+    const hydrateKey = `${pubkey}:${companionD}`;
+    if (hydratedRef.current === hydrateKey) return;
+    hydratedRef.current = hydrateKey;
+
+    const companionEvolution = companion?.evolution ?? [];
+    if (companionEvolution.length > 0) {
+      hydrateEvolutionFromPersisted(companionEvolution, pubkey, companionD);
+    }
+  }, [isEvolving, pubkey, companionD, companion?.evolution]);
 
   // ─── Ensure evolution missions exist and match current definitions ───
-  // Safety net: if the companion is evolving but evolution[] is empty
-  // (e.g. persist didn't fire, hydration lost them), re-populate from
-  // the static definitions so tally tracking works immediately.
-  // Also handles schema migrations: if persisted missions don't match
-  // the current EVOLVE_MISSIONS (e.g. a mission was added or removed),
-  // rebuild from definitions while preserving progress for surviving missions.
-  const ensuredRef = useRef(false);
+  // Scoped by pubkey:d so switching Blobbis re-runs the check.
+  const ensuredRef = useRef<string | null>(null);
   useEffect(() => {
-    if (!isEvolving || !pubkey || ensuredRef.current) return;
+    const ensureKey = `${pubkey}:${companionD}`;
+    if (!isEvolving || !pubkey || !companionD || ensuredRef.current === ensureKey) return;
 
-    const store = ensureSessionStore(pubkey);
-    if (store.evolution.length === 0) {
-      writeMissionsToStorage({ ...store, evolution: createEvolveMissions() }, pubkey);
-      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true } }));
-    } else if (!evolutionMatchesDefinitions(store.evolution, EVOLVE_MISSIONS)) {
-      const migrated = migrateEvolutionMissions(store.evolution, EVOLVE_MISSIONS);
-      writeMissionsToStorage({ ...store, evolution: migrated }, pubkey);
-      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true } }));
+    const fromStore = readEvolutionFromStorage(pubkey, companionD);
+    const current = fromStore && fromStore.length > 0 ? fromStore : (companion?.evolution ?? []);
+
+    if (current.length === 0) {
+      const fresh = createEvolveMissions();
+      writeEvolutionToStorage(fresh, pubkey, companionD);
+      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true, d: companionD } }));
+    } else if (!evolutionMatchesDefinitions(current, EVOLVE_MISSIONS)) {
+      const migrated = migrateEvolutionMissions(current, EVOLVE_MISSIONS);
+      writeEvolutionToStorage(migrated, pubkey, companionD);
+      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true, d: companionD } }));
     }
-    ensuredRef.current = true;
-  }, [isEvolving, pubkey, evolution]);
+    ensuredRef.current = ensureKey;
+  }, [isEvolving, pubkey, companionD, companion?.evolution]);
 
   // ─── Retroactive Nostr Queries (discover event IDs to backfill) ───
   const { data, isLoading, error, refetch } = useQuery({
-    queryKey: ['evolve-tasks', pubkey],
+    queryKey: ['evolve-tasks', pubkey, companionD],
     queryFn: async () => {
       if (!pubkey) return null;
 
@@ -144,7 +168,6 @@ export function useEvolveTasks(
   });
 
   // ─── Compute event counts directly from Nostr query results ───
-  // These are the authoritative counts for event-based tasks.
   const queryCounts: Record<string, number> = useMemo(() => {
     if (!data) return {} as Record<string, number>;
     return {
@@ -158,24 +181,23 @@ export function useEvolveTasks(
   const lastBackfilledDataRef = useRef<typeof data>(null);
 
   useEffect(() => {
-    if (!data || !pubkey || evolution.length === 0) return;
+    if (!data || !pubkey || !companionD || evolution.length === 0) return;
     if (data === lastBackfilledDataRef.current) return;
     lastBackfilledDataRef.current = data;
 
-    const current = readMissionsFromStorage(pubkey);
-    if (!current || current.evolution.length === 0) return;
-    const evo = current.evolution;
+    const current = readEvolutionFromStorage(pubkey, companionD);
+    if (!current || current.length === 0) return;
 
     for (const event of data.themeEvents) {
-      const m = findEvolutionMission(evo, 'create_themes');
+      const m = findEvolutionMission(current, 'create_themes');
       if (m && isEventMission(m) && !m.events.includes(event.id)) {
-        trackEvolutionMissionEvent('create_themes', event.id, pubkey);
+        trackEvolutionMissionEvent('create_themes', event.id, pubkey, companionD);
       }
     }
     for (const event of data.colorMomentEvents) {
-      const m = findEvolutionMission(evo, 'color_moments');
+      const m = findEvolutionMission(current, 'color_moments');
       if (m && isEventMission(m) && !m.events.includes(event.id)) {
-        trackEvolutionMissionEvent('color_moments', event.id, pubkey);
+        trackEvolutionMissionEvent('color_moments', event.id, pubkey, companionD);
       }
     }
     const profileEditEvents = [
@@ -183,18 +205,14 @@ export function useEvolveTasks(
       ...(data.hasProfileMetadata ? [{ id: 'profile-metadata' }] : []),
     ];
     for (const event of profileEditEvents) {
-      const m = findEvolutionMission(evo, 'edit_profile');
+      const m = findEvolutionMission(current, 'edit_profile');
       if (m && isEventMission(m) && !m.events.includes(event.id)) {
-        trackEvolutionMissionEvent('edit_profile', event.id, pubkey);
+        trackEvolutionMissionEvent('edit_profile', event.id, pubkey, companionD);
       }
     }
-  }, [data, pubkey, evolution]);
+  }, [data, pubkey, companionD, evolution]);
 
   // ─── Build task view models ───
-  // For event-based tasks, use the MAX of the Nostr query count and the
-  // evolution mission progress. The query is authoritative but the mission
-  // store may have progress from a previous session that hasn't been
-  // re-queried yet.
   const tasks: HatchTask[] = EVOLVE_MISSIONS.map((def) => {
     const mission = findEvolutionMission(evolution, def.id);
     const missionCount = mission ? missionProgress(mission) : 0;
@@ -261,5 +279,3 @@ export function useEvolveTasks(
     refetch,
   };
 }
-
-
diff --git a/src/blobbi/actions/hooks/useHatchTasks.ts b/src/blobbi/actions/hooks/useHatchTasks.ts
index 400050a4..66e32430 100644
--- a/src/blobbi/actions/hooks/useHatchTasks.ts
+++ b/src/blobbi/actions/hooks/useHatchTasks.ts
@@ -3,13 +3,13 @@
 /**
  * Hook to compute hatch task progress.
  *
- * Progress is stored in `MissionsContent.evolution[]` on kind 11125.
+ * Progress is stored in the kind 31124 Blobbi event content JSON (per-Blobbi).
  * - Interactions: TallyMission tracked via `trackEvolutionMissionTally`
  * - Event-based tasks: EventMission, backfilled from retroactive Nostr queries
  *
  * The Nostr queries discover event IDs that satisfy event-based tasks and
- * feed them into the evolution tracker. The evolution array is the source of
- * truth for completion state.
+ * feed them into the evolution tracker. The evolution array (from companion
+ * or session store) is the source of truth for completion state.
  */
 
 import { useEffect, useRef, useMemo } from 'react';
@@ -19,9 +19,14 @@ import type { NostrFilter } from '@nostrify/nostrify';
 
 import { useCurrentUser } from '@/hooks/useCurrentUser';
 import type { BlobbiCompanion } from '@/blobbi/core/lib/blobbi';
-import type { MissionsContent } from '@/blobbi/core/lib/missions';
+import type { Mission } from '@/blobbi/core/lib/missions';
 import { missionProgress, isEventMission } from '@/blobbi/core/lib/missions';
-import { trackEvolutionMissionEvent, readMissionsFromStorage, ensureSessionStore, writeMissionsToStorage } from '../lib/daily-mission-tracker';
+import {
+  trackEvolutionMissionEvent,
+  readEvolutionFromStorage,
+  writeEvolutionToStorage,
+  hydrateEvolutionFromPersisted,
+} from '../lib/daily-mission-tracker';
 import {
   HATCH_MISSIONS,
   HATCH_REQUIRED_INTERACTIONS,
@@ -99,45 +104,71 @@ export interface HatchTasksResult {
  * Hook to compute hatch task progress from evolution missions + Nostr event backfill.
  *
  * @param companion - The Blobbi companion (must be incubating)
- * @param missions - Current MissionsContent from the session store
  */
 export function useHatchTasks(
   companion: BlobbiCompanion | null,
-  missions: MissionsContent | undefined,
 ): HatchTasksResult {
   const { user } = useCurrentUser();
   const { nostr } = useNostr();
 
   const pubkey = user?.pubkey;
+  const companionD = companion?.d;
   const isIncubating = companion?.progressionState === 'incubating';
-  const evolution = useMemo(() => missions?.evolution ?? [], [missions?.evolution]);
+
+  // Read evolution from companion (31124 content) or session store
+  const evolution = useMemo((): Mission[] => {
+    if (!pubkey || !companionD) return [];
+    // Session store takes priority (has latest in-session progress)
+    const fromStore = readEvolutionFromStorage(pubkey, companionD);
+    if (fromStore && fromStore.length > 0) return fromStore;
+    // Fall back to companion's persisted evolution from 31124 content
+    return companion?.evolution ?? [];
+  }, [pubkey, companionD, companion?.evolution]);
+
+  // ─── Hydrate evolution store from companion on mount ───
+  // If the companion has persisted evolution data but the session store is empty,
+  // seed the session store so tally tracking works immediately.
+  const hydratedRef = useRef<string | null>(null);
+  useEffect(() => {
+    if (!isIncubating || !pubkey || !companionD) return;
+    const hydrateKey = `${pubkey}:${companionD}`;
+    if (hydratedRef.current === hydrateKey) return;
+    hydratedRef.current = hydrateKey;
+
+    const companionEvolution = companion?.evolution ?? [];
+    if (companionEvolution.length > 0) {
+      hydrateEvolutionFromPersisted(companionEvolution, pubkey, companionD);
+    }
+  }, [isIncubating, pubkey, companionD, companion?.evolution]);
 
   // ─── Ensure evolution missions exist and match current definitions ───
   // Safety net: if the companion is incubating but evolution[] is empty
-  // (e.g. persist didn't fire, hydration lost them), re-populate from
+  // (e.g. persist didn't fire, old content format), re-populate from
   // the static definitions so tally tracking works immediately.
-  // Also handles schema migrations: if persisted missions don't match
-  // the current HATCH_MISSIONS (e.g. a mission was added or removed),
-  // rebuild from definitions while preserving progress for surviving missions.
-  const ensuredRef = useRef(false);
+  // Scoped by pubkey:d so switching Blobbis re-runs the check.
+  const ensuredRef = useRef<string | null>(null);
   useEffect(() => {
-    if (!isIncubating || !pubkey || ensuredRef.current) return;
+    const ensureKey = `${pubkey}:${companionD}`;
+    if (!isIncubating || !pubkey || !companionD || ensuredRef.current === ensureKey) return;
 
-    const store = ensureSessionStore(pubkey);
-    if (store.evolution.length === 0) {
-      writeMissionsToStorage({ ...store, evolution: createHatchMissions() }, pubkey);
-      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true } }));
-    } else if (!evolutionMatchesDefinitions(store.evolution, HATCH_MISSIONS)) {
-      const migrated = migrateEvolutionMissions(store.evolution, HATCH_MISSIONS);
-      writeMissionsToStorage({ ...store, evolution: migrated }, pubkey);
-      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true } }));
+    const fromStore = readEvolutionFromStorage(pubkey, companionD);
+    const current = fromStore && fromStore.length > 0 ? fromStore : (companion?.evolution ?? []);
+
+    if (current.length === 0) {
+      const fresh = createHatchMissions();
+      writeEvolutionToStorage(fresh, pubkey, companionD);
+      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true, d: companionD } }));
+    } else if (!evolutionMatchesDefinitions(current, HATCH_MISSIONS)) {
+      const migrated = migrateEvolutionMissions(current, HATCH_MISSIONS);
+      writeEvolutionToStorage(migrated, pubkey, companionD);
+      window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail: { evolution: true, d: companionD } }));
     }
-    ensuredRef.current = true;
-  }, [isIncubating, pubkey, evolution]);
+    ensuredRef.current = ensureKey;
+  }, [isIncubating, pubkey, companionD, companion?.evolution]);
 
   // ─── Retroactive Nostr Queries (discover event IDs to backfill) ───
   const { data, isLoading, error, refetch } = useQuery({
-    queryKey: ['hatch-tasks', pubkey],
+    queryKey: ['hatch-tasks', pubkey, companionD],
     queryFn: async () => {
       if (!pubkey) return null;
 
@@ -159,7 +190,6 @@ export function useHatchTasks(
   });
 
   // ─── Compute event counts directly from Nostr query results ───
-  // These are the authoritative counts for event-based tasks.
   const queryCounts: Record<string, number> = useMemo(() => {
     if (!data) return {} as Record<string, number>;
     return {
@@ -172,33 +202,28 @@ export function useHatchTasks(
   const lastBackfilledDataRef = useRef<typeof data>(null);
 
   useEffect(() => {
-    if (!data || !pubkey || evolution.length === 0) return;
+    if (!data || !pubkey || !companionD || evolution.length === 0) return;
     if (data === lastBackfilledDataRef.current) return;
     lastBackfilledDataRef.current = data;
 
-    const current = readMissionsFromStorage(pubkey);
-    if (!current || current.evolution.length === 0) return;
-    const evo = current.evolution;
+    const current = readEvolutionFromStorage(pubkey, companionD);
+    if (!current || current.length === 0) return;
 
     for (const event of data.themeEvents) {
-      const m = findEvolutionMission(evo, 'create_theme');
+      const m = findEvolutionMission(current, 'create_theme');
       if (m && isEventMission(m) && !m.events.includes(event.id)) {
-        trackEvolutionMissionEvent('create_theme', event.id, pubkey);
+        trackEvolutionMissionEvent('create_theme', event.id, pubkey, companionD);
       }
     }
     for (const event of data.colorMomentEvents) {
-      const m = findEvolutionMission(evo, 'color_moment');
+      const m = findEvolutionMission(current, 'color_moment');
       if (m && isEventMission(m) && !m.events.includes(event.id)) {
-        trackEvolutionMissionEvent('color_moment', event.id, pubkey);
+        trackEvolutionMissionEvent('color_moment', event.id, pubkey, companionD);
       }
     }
-  }, [data, pubkey, evolution]);
+  }, [data, pubkey, companionD, evolution]);
 
   // ─── Build task view models ───
-  // For event-based tasks, use the MAX of the Nostr query count and the
-  // evolution mission progress. The query is authoritative but the mission
-  // store may have progress from a previous session that hasn't been
-  // re-queried yet.
   const tasks: HatchTask[] = HATCH_MISSIONS.map((def) => {
     const mission = findEvolutionMission(evolution, def.id);
     const missionCount = mission ? missionProgress(mission) : 0;
diff --git a/src/blobbi/actions/hooks/usePersistEvolutionProgress.ts b/src/blobbi/actions/hooks/usePersistEvolutionProgress.ts
index 63f2a37e..68bf79a3 100644
--- a/src/blobbi/actions/hooks/usePersistEvolutionProgress.ts
+++ b/src/blobbi/actions/hooks/usePersistEvolutionProgress.ts
@@ -1,10 +1,9 @@
 /**
  * usePersistEvolutionProgress - Debounced persistence for evolution mission progress.
  *
- * Evolution missions (hatch/evolve tasks) live in `MissionsContent.evolution[]`
- * in the in-memory session store. This hook listens for changes and debounce-
- * publishes the updated state to kind 11125 content JSON so progress survives
- * page refreshes.
+ * Evolution missions live in the per-Blobbi session store (keyed by pubkey:d).
+ * This hook listens for changes and debounce-publishes the updated state to the
+ * kind 31124 Blobbi event content JSON so progress survives page refreshes.
  *
  * Design:
  * - Listens to 'daily-missions-updated' CustomEvent (same event the tracker fires)
@@ -23,10 +22,10 @@ import { useNostrPublish } from '@/hooks/useNostrPublish';
 import { fetchFreshEvent } from '@/lib/fetchFreshEvent';
 
 import {
-  KIND_BLOBBONAUT_PROFILE,
+  KIND_BLOBBI_STATE,
 } from '@/blobbi/core/lib/blobbi';
-import { serializeProfileContent } from '@/blobbi/core/lib/missions';
-import { readMissionsFromStorage } from '../lib/daily-mission-tracker';
+import { serializeEvolutionContent } from '@/blobbi/core/lib/missions';
+import { readEvolutionFromStorage } from '../lib/daily-mission-tracker';
 
 import type { NostrEvent } from '@nostrify/nostrify';
 
@@ -38,10 +37,12 @@ const PERSIST_DELAY_MS = 5_000;
 // ─── Hook ─────────────────────────────────────────────────────────────────────
 
 /**
- * @param updateProfileEvent - Callback to update profile in query cache
+ * @param companionD - The d-tag of the active Blobbi (required for per-Blobbi storage)
+ * @param updateCompanionEvent - Callback to update companion in query cache
  */
 export function usePersistEvolutionProgress(
-  updateProfileEvent: (event: NostrEvent) => void,
+  companionD: string | undefined,
+  updateCompanionEvent: (event: NostrEvent) => void,
 ): void {
   const { user } = useCurrentUser();
   const { nostr } = useNostr();
@@ -53,42 +54,56 @@ export function usePersistEvolutionProgress(
 
   const persist = useCallback(async () => {
     const pubkey = user?.pubkey;
-    if (!pubkey || publishingRef.current) return;
+    if (!pubkey || !companionD || publishingRef.current) return;
 
-    const missions = readMissionsFromStorage(pubkey);
-    if (!missions || missions.evolution.length === 0) return;
+    const evolution = readEvolutionFromStorage(pubkey, companionD);
+    if (!evolution || evolution.length === 0) return;
 
     publishingRef.current = true;
     try {
+      // Fetch the fresh Blobbi event from relays
       const prev = await fetchFreshEvent(nostr, {
-        kinds: [KIND_BLOBBONAUT_PROFILE],
+        kinds: [KIND_BLOBBI_STATE],
         authors: [pubkey],
+        '#d': [companionD],
       });
 
-      const content = serializeProfileContent(
-        prev?.content ?? '',
-        { missions },
-      );
+      if (!prev) {
+        console.warn('[PersistEvolution] No Blobbi event found for d-tag:', companionD);
+        return;
+      }
+
+      const content = serializeEvolutionContent(prev.content, evolution);
+
+      // Skip publish if the content is already up-to-date.
+      // This avoids redundant replaceable-event publishes when the
+      // primary interaction write path already persisted the same data.
+      if (content === prev.content) return;
 
       const event = await publishEvent({
-        kind: KIND_BLOBBONAUT_PROFILE,
+        kind: KIND_BLOBBI_STATE,
         content,
-        tags: prev?.tags ?? [],
-        prev: prev ?? undefined,
+        tags: prev.tags,
+        prev,
       });
 
-      updateProfileEvent(event);
-      queryClient.invalidateQueries({ queryKey: ['blobbonaut-profile', pubkey] });
+      updateCompanionEvent(event);
+      queryClient.invalidateQueries({ queryKey: ['blobbi-collection', pubkey] });
     } finally {
       publishingRef.current = false;
     }
-  }, [user?.pubkey, nostr, publishEvent, updateProfileEvent, queryClient]);
+  }, [user?.pubkey, companionD, nostr, publishEvent, updateCompanionEvent, queryClient]);
 
   useEffect(() => {
     const handler = (e: Event) => {
       const detail = (e as CustomEvent).detail;
       if (!detail?.evolution) return;
 
+      // Only react to evolution updates for the active companion.
+      // detail.d is set by trackEvolutionMissionTally/Event; if absent
+      // (legacy caller), accept it to avoid silently dropping updates.
+      if (detail.d && detail.d !== companionD) return;
+
       // Clear any pending timer and restart the debounce
       if (timerRef.current) clearTimeout(timerRef.current);
       timerRef.current = setTimeout(() => {
@@ -103,5 +118,5 @@ export function usePersistEvolutionProgress(
       window.removeEventListener('daily-missions-updated', handler);
       if (timerRef.current) clearTimeout(timerRef.current);
     };
-  }, [persist]);
+  }, [persist, companionD]);
 }
diff --git a/src/blobbi/actions/lib/daily-mission-tracker.ts b/src/blobbi/actions/lib/daily-mission-tracker.ts
index 954f76e8..ed81fa12 100644
--- a/src/blobbi/actions/lib/daily-mission-tracker.ts
+++ b/src/blobbi/actions/lib/daily-mission-tracker.ts
@@ -1,16 +1,18 @@
 /**
  * Daily Mission Tracker - Standalone progress tracking utility
  *
- * Provides a way to record daily mission progress from anywhere
- * (hooks, event handlers, etc.) without requiring React context.
+ * Two separate in-memory stores:
+ *   - dailyStore: pubkey-scoped, for daily missions (kind 11125)
+ *   - evolutionStore: pubkey:d-scoped, for per-Blobbi evolution missions (kind 31124)
  *
- * Uses a pubkey-scoped in-memory Map. Kind 11125 content JSON is the
- * persistent source of truth. Completed missions are persisted by
- * `useAwardDailyXp`; intermediate progress resets on page refresh.
+ * Both cleared on page refresh. The persistent source of truth is:
+ *   - Daily missions → kind 11125 content JSON
+ *   - Evolution missions → kind 31124 content JSON
  *
  * Dispatches 'daily-missions-updated' CustomEvent so React hooks re-render.
  */
 
+import type { Mission } from '@/blobbi/core/lib/missions';
 import type { MissionsContent } from '@/blobbi/core/lib/missions';
 import type { DailyMissionAction } from './daily-missions';
 import {
@@ -19,31 +21,31 @@ import {
   createDailyMissionsContent,
   trackTally,
   trackEvent,
-  trackEvolutionTally,
-  trackEvolutionEvent,
+  trackEvolutionTally as trackEvoTally,
+  trackEvolutionEvent as trackEvoEvent,
 } from './daily-missions';
 
-// ─── In-Memory Session Store ──────────────────────────────────────────────────
+// ─── Daily Mission Session Store (per-user) ──────────────────────────────────
 
 /**
- * Pubkey-scoped session cache. Each logged-in user gets their own entry.
+ * Pubkey-scoped session cache for daily missions.
  * Cleared on page refresh (intentional — kind 11125 is the persistent store).
  */
-const sessionStore = new Map<string, MissionsContent>();
+const dailyStore = new Map<string, MissionsContent>();
 
-function key(pubkey: string | undefined): string {
+function dailyKey(pubkey: string | undefined): string {
   return pubkey ?? '';
 }
 
-function ensureCurrent(pubkey?: string): MissionsContent {
-  const current = sessionStore.get(key(pubkey));
+function ensureDailyCurrent(pubkey?: string, availableStages?: import('./daily-missions').BlobbiStage[]): MissionsContent {
+  const current = dailyStore.get(dailyKey(pubkey));
   if (!needsDailyReset(current)) return current!;
   const fresh = createDailyMissionsContent(
     getTodayDateString(),
-    current?.evolution ?? [],
     pubkey,
+    availableStages,
   );
-  sessionStore.set(key(pubkey), fresh);
+  dailyStore.set(dailyKey(pubkey), fresh);
   return fresh;
 }
 
@@ -51,7 +53,20 @@ function notify(detail?: Record<string, unknown>): void {
   window.dispatchEvent(new CustomEvent('daily-missions-updated', { detail }));
 }
 
-// ─── Public API ───────────────────────────────────────────────────────────────
+// ─── Evolution Mission Session Store (per-Blobbi) ────────────────────────────
+
+/**
+ * Per-Blobbi session cache for evolution missions.
+ * Keyed by `pubkey:d` so each Blobbi has its own evolution progress.
+ * Cleared on page refresh — kind 31124 content is the persistent store.
+ */
+const evolutionStore = new Map<string, Mission[]>();
+
+function evoKey(pubkey: string | undefined, d: string | undefined): string {
+  return `${pubkey ?? ''}:${d ?? ''}`;
+}
+
+// ─── Public API: Daily Missions ──────────────────────────────────────────────
 
 /**
  * Record a tally-based action (feed, clean, interact, etc.).
@@ -61,9 +76,9 @@ export function trackDailyMissionProgress(
   count: number = 1,
   pubkey?: string,
 ): void {
-  const current = ensureCurrent(pubkey);
+  const current = ensureDailyCurrent(pubkey);
   const updated = trackTally(current, action, count);
-  sessionStore.set(key(pubkey), updated);
+  dailyStore.set(dailyKey(pubkey), updated);
   notify({ action, count });
 }
 
@@ -75,9 +90,9 @@ export function trackDailyMissionEvent(
   eventId: string,
   pubkey?: string,
 ): void {
-  const current = ensureCurrent(pubkey);
+  const current = ensureDailyCurrent(pubkey);
   const updated = trackEvent(current, action, eventId);
-  sessionStore.set(key(pubkey), updated);
+  dailyStore.set(dailyKey(pubkey), updated);
   notify({ action, eventId });
 }
 
@@ -88,80 +103,130 @@ export function trackMultipleDailyMissionActions(
   actions: DailyMissionAction[],
   pubkey?: string,
 ): void {
-  let current = ensureCurrent(pubkey);
+  let current = ensureDailyCurrent(pubkey);
   for (const action of actions) {
     current = trackTally(current, action, 1);
   }
-  sessionStore.set(key(pubkey), current);
+  dailyStore.set(dailyKey(pubkey), current);
   notify({ actions });
 }
 
-// ─── Evolution Mission Tracking ───────────────────────────────────────────────
+// ─── Public API: Evolution Missions (per-Blobbi) ─────────────────────────────
 
 /**
  * Increment tally for an evolution mission (e.g. interactions).
- * No-ops if pubkey missing or session store empty.
+ * No-ops if the store is empty for this Blobbi.
  */
 export function trackEvolutionMissionTally(
   missionId: string,
   count: number = 1,
   pubkey?: string,
+  d?: string,
 ): void {
-  const current = sessionStore.get(key(pubkey));
-  if (!current) return;
+  const k = evoKey(pubkey, d);
+  const current = evolutionStore.get(k);
+  if (!current || current.length === 0) return;
 
-  const updated = trackEvolutionTally(current, missionId, count);
-  sessionStore.set(key(pubkey), updated);
-  notify({ evolution: true, missionId, count });
+  const updated = trackEvoTally(current, missionId, count);
+  evolutionStore.set(k, updated);
+  notify({ evolution: true, missionId, count, d });
 }
 
 /**
  * Append a Nostr event ID to an evolution mission (e.g. create_theme).
- * Deduplicates by event ID. No-ops if pubkey missing or session store empty.
+ * Deduplicates by event ID. No-ops if the store is empty for this Blobbi.
  */
 export function trackEvolutionMissionEvent(
   missionId: string,
   eventId: string,
   pubkey?: string,
+  d?: string,
 ): void {
-  const current = sessionStore.get(key(pubkey));
-  if (!current) return;
+  const k = evoKey(pubkey, d);
+  const current = evolutionStore.get(k);
+  if (!current || current.length === 0) return;
 
-  const updated = trackEvolutionEvent(current, missionId, eventId);
-  sessionStore.set(key(pubkey), updated);
-  notify({ evolution: true, missionId, eventId });
+  const updated = trackEvoEvent(current, missionId, eventId);
+  evolutionStore.set(k, updated);
+  notify({ evolution: true, missionId, eventId, d });
 }
 
-// ─── Storage Access ──────────────────────────────────────────────────────────
+// ─── Storage Access: Daily ───────────────────────────────────────────────────
 
-/** Read current session state for a pubkey. */
-export function readMissionsFromStorage(pubkey?: string): MissionsContent | undefined {
-  return sessionStore.get(key(pubkey));
+/** Read current daily session state for a pubkey. */
+export function readDailyFromStorage(pubkey?: string): MissionsContent | undefined {
+  return dailyStore.get(dailyKey(pubkey));
 }
 
 /**
- * Ensure the session store has an entry for the given pubkey.
- * If the store is empty or needs a daily reset, a fresh entry is created.
+ * Ensure the daily store has an entry for the given pubkey.
  * Returns the current (possibly newly-created) MissionsContent.
- *
- * Use this before writing evolution missions into the store, to avoid
- * silent no-ops when the store hasn't been hydrated yet.
  */
-export function ensureSessionStore(pubkey?: string): MissionsContent {
-  return ensureCurrent(pubkey);
+export function ensureDailyStore(pubkey?: string): MissionsContent {
+  return ensureDailyCurrent(pubkey);
 }
 
-/** Write state to session store for a pubkey. */
-export function writeMissionsToStorage(missions: MissionsContent, pubkey?: string): void {
-  sessionStore.set(key(pubkey), missions);
+/** Write daily state to session store for a pubkey. */
+export function writeDailyToStorage(missions: MissionsContent, pubkey?: string): void {
+  dailyStore.set(dailyKey(pubkey), missions);
 }
 
 /**
- * Hydrate the session store from kind 11125 persisted data.
+ * Hydrate the daily session store from kind 11125 persisted data.
  * Called once on mount / account switch when the session store is empty.
  * No-op if the store already has data for this pubkey.
  */
-export function hydrateFromPersisted(missions: MissionsContent, pubkey: string): void {
-  if (sessionStore.has(pubkey)) return;
-  sessionStore.set(pubkey, missions);
+export function hydrateDailyFromPersisted(missions: MissionsContent, pubkey: string): void {
+  if (dailyStore.has(pubkey)) return;
+  dailyStore.set(pubkey, missions);
 }
+
+// ─── Storage Access: Evolution (per-Blobbi) ──────────────────────────────────
+
+/** Read current evolution session state for a specific Blobbi. */
+export function readEvolutionFromStorage(pubkey?: string, d?: string): Mission[] | undefined {
+  return evolutionStore.get(evoKey(pubkey, d));
+}
+
+/** Write evolution state for a specific Blobbi. */
+export function writeEvolutionToStorage(evolution: Mission[], pubkey?: string, d?: string): void {
+  evolutionStore.set(evoKey(pubkey, d), evolution);
+}
+
+/**
+ * Hydrate the evolution session store from kind 31124 content.
+ * Called once when a companion with active progression is loaded.
+ * No-op if the store already has data for this Blobbi.
+ */
+export function hydrateEvolutionFromPersisted(evolution: Mission[], pubkey: string, d: string): void {
+  const k = evoKey(pubkey, d);
+  if (evolutionStore.has(k)) return;
+  evolutionStore.set(k, evolution);
+}
+
+/** Clear evolution store for a specific Blobbi (on stage transition / stop). */
+export function clearEvolutionFromStorage(pubkey?: string, d?: string): void {
+  evolutionStore.delete(evoKey(pubkey, d));
+}
+
+// ─── Backward-compat aliases ─────────────────────────────────────────────────
+
+/**
+ * @deprecated Use readDailyFromStorage. Kept for callers that haven't migrated.
+ */
+export const readMissionsFromStorage = readDailyFromStorage;
+
+/**
+ * @deprecated Use writeDailyToStorage. Kept for callers that haven't migrated.
+ */
+export const writeMissionsToStorage = writeDailyToStorage;
+
+/**
+ * @deprecated Use ensureDailyStore. Kept for callers that haven't migrated.
+ */
+export const ensureSessionStore = ensureDailyStore;
+
+/**
+ * @deprecated Use hydrateDailyFromPersisted. Kept for callers that haven't migrated.
+ */
+export const hydrateFromPersisted = hydrateDailyFromPersisted;
diff --git a/src/blobbi/actions/lib/daily-missions.ts b/src/blobbi/actions/lib/daily-missions.ts
index 8f3821b3..16d578c9 100644
--- a/src/blobbi/actions/lib/daily-missions.ts
+++ b/src/blobbi/actions/lib/daily-missions.ts
@@ -267,10 +267,9 @@ export function createMission(def: DailyMissionDefinition): Mission {
   return { id: def.id, target: def.target, count: 0 } satisfies TallyMission;
 }
 
-/** Create a fresh MissionsContent for a new day, preserving evolution missions */
+/** Create a fresh MissionsContent for a new day */
 export function createDailyMissionsContent(
   dateString: string,
-  existingEvolution: Mission[],
   pubkey?: string,
   availableStages?: BlobbiStage[],
 ): MissionsContent {
@@ -278,7 +277,6 @@ export function createDailyMissionsContent(
   return {
     date: dateString,
     daily: defs.map(createMission),
-    evolution: existingEvolution,
     rerolls: MAX_DAILY_REROLLS,
   };
 }
@@ -324,39 +322,41 @@ export function trackEvent(
   return { ...missions, daily: updated };
 }
 
+// ─── Evolution Mission Tracking (operates on Mission[] directly) ─────────────
+
 /**
- * Track progress for an evolution mission by tally.
+ * Increment tally for an evolution mission by ID.
+ * Returns a new array (immutable). Used by the evolution session store.
  */
 export function trackEvolutionTally(
-  missions: MissionsContent,
+  evolution: Mission[],
   missionId: string,
   incrementBy: number = 1,
-): MissionsContent {
-  const updated = missions.evolution.map((m) => {
+): Mission[] {
+  return evolution.map((m) => {
     if (m.id !== missionId) return m;
     if (!isTallyMission(m)) return m;
     if (m.count >= m.target) return m;
     return { ...m, count: Math.min(m.count + incrementBy, m.target) };
   });
-  return { ...missions, evolution: updated };
 }
 
 /**
- * Append an event ID to an evolution mission.
+ * Append a Nostr event ID to an evolution mission.
+ * Returns a new array (immutable). Used by the evolution session store.
  */
 export function trackEvolutionEvent(
-  missions: MissionsContent,
+  evolution: Mission[],
   missionId: string,
   eventId: string,
-): MissionsContent {
-  const updated = missions.evolution.map((m) => {
+): Mission[] {
+  return evolution.map((m) => {
     if (m.id !== missionId) return m;
     if (!isEventMission(m)) return m;
     if (m.events.length >= m.target) return m;
     if (m.events.includes(eventId)) return m;
     return { ...m, events: [...m.events, eventId] };
   });
-  return { ...missions, evolution: updated };
 }
 
 // ─── Completion Queries ──────────────────────────────────────────────────────
@@ -366,11 +366,6 @@ export function areAllDailyComplete(missions: MissionsContent): boolean {
   return missions.daily.length > 0 && missions.daily.every(isMissionComplete);
 }
 
-/** Whether all evolution missions are complete */
-export function areAllEvolutionComplete(missions: MissionsContent): boolean {
-  return missions.evolution.length > 0 && missions.evolution.every(isMissionComplete);
-}
-
 /** Total XP available from today's daily missions (including bonus if all complete) */
 export function totalDailyXp(missions: MissionsContent): number {
   const base = missions.daily.reduce((sum, m) => {
diff --git a/src/blobbi/companion/interaction/useBlobbiItemUse.ts b/src/blobbi/companion/interaction/useBlobbiItemUse.ts
index ba2b0f8b..652a3360 100644
--- a/src/blobbi/companion/interaction/useBlobbiItemUse.ts
+++ b/src/blobbi/companion/interaction/useBlobbiItemUse.ts
@@ -48,8 +48,9 @@ import {
   type InventoryAction,
   ACTION_METADATA,
 } from '@/blobbi/actions/lib/blobbi-action-utils';
-import { trackMultipleDailyMissionActions, trackEvolutionMissionTally } from '@/blobbi/actions/lib/daily-mission-tracker';
+import { trackMultipleDailyMissionActions, trackEvolutionMissionTally, readEvolutionFromStorage } from '@/blobbi/actions/lib/daily-mission-tracker';
 import type { DailyMissionAction } from '@/blobbi/actions/lib/daily-missions';
+import { serializeEvolutionContent } from '@/blobbi/core/lib/missions';
 import { getStreakTagUpdates } from '@/blobbi/actions/lib/blobbi-streak';
 
 import type { UseItemFunction } from './BlobbiActionsContextDef';
@@ -354,9 +355,18 @@ export function useBlobbiItemUse(options: UseBlobbiItemUseOptions = {}): UseBlob
       const progressionState = companion.progressionState;
       const updatedTags = companion.allTags;
       if (progressionState === 'incubating' || progressionState === 'evolving') {
-        trackEvolutionMissionTally('interactions', 1, user?.pubkey);
+        trackEvolutionMissionTally('interactions', 1, user?.pubkey, companion.d);
       }
       
+      // ─── Build content with latest evolution state ───
+      let content = companion.event.content;
+      if (progressionState === 'incubating' || progressionState === 'evolving') {
+        const evo = readEvolutionFromStorage(user?.pubkey, companion.d);
+        if (evo && evo.length > 0) {
+          content = serializeEvolutionContent(companion.event.content, evo);
+        }
+      }
+
       // Get streak updates (will only update if needed based on day)
       const streakUpdates = getStreakTagUpdates(companion) ?? {};
       
@@ -369,7 +379,7 @@ export function useBlobbiItemUse(options: UseBlobbiItemUseOptions = {}): UseBlob
       
       const blobbiEvent = await publishEvent({
         kind: KIND_BLOBBI_STATE,
-        content: companion.event.content,
+        content,
         tags: blobbiTags,
       });
       
diff --git a/src/blobbi/core/lib/blobbi.ts b/src/blobbi/core/lib/blobbi.ts
index 4bfd797a..cc19c155 100644
--- a/src/blobbi/core/lib/blobbi.ts
+++ b/src/blobbi/core/lib/blobbi.ts
@@ -3,6 +3,8 @@ import { bytesToHex } from '@noble/hashes/utils';
 import type { NostrEvent } from '@nostrify/nostrify';
 
 import { validateAndRepairBlobbiTags } from './blobbi-tag-schema';
+import type { Mission } from './missions';
+import { parseEvolutionContent } from './missions';
 
 // ─── Constants ────────────────────────────────────────────────────────────────
 
@@ -300,6 +302,8 @@ export interface BlobbiCompanion {
   tasks: BlobbiTaskProgress[];
   /** Completed task names */
   tasksCompleted: string[];
+  /** Evolution missions parsed from 31124 content JSON (per-Blobbi progression) */
+  evolution: Mission[];
   /** All tags preserved for republishing */
   allTags: string[][];
 }
@@ -970,6 +974,9 @@ export function parseBlobbiEvent(event: NostrEvent): BlobbiCompanion | undefined
     }
   }
   
+  // Parse evolution missions from 31124 content JSON (per-Blobbi)
+  const evolution = parseEvolutionContent(event.content);
+
   return {
     event,
     d,
@@ -1002,6 +1009,7 @@ export function parseBlobbiEvent(event: NostrEvent): BlobbiCompanion | undefined
     progressionStartedAt: parseNumericTag(tags, 'progression_started_at') ?? parseNumericTag(tags, 'state_started_at'),
     tasks,
     tasksCompleted,
+    evolution,
     allTags: tags,
   };
 }
diff --git a/src/blobbi/core/lib/missions.ts b/src/blobbi/core/lib/missions.ts
index c13a9958..524eec76 100644
--- a/src/blobbi/core/lib/missions.ts
+++ b/src/blobbi/core/lib/missions.ts
@@ -1,10 +1,9 @@
 /**
  * Missions Content Model
  *
- * Defines the JSON shape stored in the kind 11125 content field.
- * Two mission categories:
- *   - daily: reset each day, tally-based or event-based
- *   - evolution: persist across sessions until stage transition completes
+ * Two separate persistence locations:
+ *   - Daily missions → kind 11125 content JSON (per-user)
+ *   - Evolution missions → kind 31124 content JSON (per-Blobbi)
  *
  * Tally missions track a `count` (no event IDs).
  * Event missions track an `events` array of Nostr event IDs.
@@ -52,13 +51,12 @@ export function missionProgress(m: Mission): number {
   return m.count;
 }
 
-// ─── Content Shape ───────────────────────────────────────────────────────────
+// ─── Daily Missions (kind 11125) ─────────────────────────────────────────────
 
-/** The full missions object stored in kind 11125 content JSON */
+/** Daily missions object stored in kind 11125 content JSON */
 export interface MissionsContent {
   date: string;                  // YYYY-MM-DD for daily reset detection
   daily: Mission[];              // 3 daily missions, reset each day
-  evolution: Mission[];          // active evolution missions, cleared on stage transition
   rerolls: number;               // daily rerolls remaining (resets with date)
 }
 
@@ -70,7 +68,55 @@ export interface ProfileContent {
   missions?: MissionsContent;
 }
 
-// ─── Parse / Serialize ───────────────────────────────────────────────────────
+// ─── Evolution Missions (kind 31124) ─────────────────────────────────────────
+
+/**
+ * Evolution mission state stored in kind 31124 content JSON.
+ * Per-Blobbi progression that survives reloads.
+ */
+export interface EvolutionContent {
+  evolution: Mission[];
+}
+
+/**
+ * Parse evolution missions from a kind 31124 content field.
+ * Returns empty array for empty/invalid/non-JSON content. Never throws.
+ */
+export function parseEvolutionContent(content: string): Mission[] {
+  if (!content || !content.trim()) return [];
+  try {
+    const raw = JSON.parse(content);
+    if (typeof raw !== 'object' || raw === null || Array.isArray(raw)) return [];
+    return parseMissionArray(raw.evolution);
+  } catch {
+    // Old-format content is plain text (e.g. "Luna is an egg...") — not JSON
+    return [];
+  }
+}
+
+/**
+ * Serialize evolution missions into kind 31124 content JSON.
+ * Preserves any unknown top-level keys from the existing content.
+ */
+export function serializeEvolutionContent(
+  existingContent: string,
+  evolution: Mission[],
+): string {
+  let base: Record<string, unknown> = {};
+  if (existingContent && existingContent.trim()) {
+    try {
+      const parsed = JSON.parse(existingContent);
+      if (typeof parsed === 'object' && parsed !== null && !Array.isArray(parsed)) {
+        base = parsed;
+      }
+    } catch {
+      // Old-format text content — start fresh
+    }
+  }
+  return JSON.stringify({ ...base, evolution });
+}
+
+// ─── Profile Content (kind 11125) ────────────────────────────────────────────
 
 /**
  * Parse the kind 11125 content field into a typed ProfileContent.
@@ -94,6 +140,9 @@ export function parseProfileContent(content: string): ProfileContent {
 /**
  * Serialize ProfileContent back to a JSON string for publishing.
  * Preserves any unknown top-level keys from the existing content.
+ *
+ * NOTE: Strips any legacy `evolution` key from the missions object
+ * so old 11125 events don't carry stale per-Blobbi data.
  */
 export function serializeProfileContent(
   existingContent: string,
@@ -110,7 +159,17 @@ export function serializeProfileContent(
       // corrupt content -- start fresh but don't lose updates
     }
   }
-  return JSON.stringify({ ...base, ...updates });
+  const merged = { ...base, ...updates };
+
+  // Strip legacy evolution from missions if present
+  if (merged.missions && typeof merged.missions === 'object' && !Array.isArray(merged.missions)) {
+    const m = merged.missions as unknown as Record<string, unknown>;
+    if ('evolution' in m) {
+      delete m.evolution;
+    }
+  }
+
+  return JSON.stringify(merged);
 }
 
 // ─── Internal Helpers ────────────────────────────────────────────────────────
@@ -120,11 +179,11 @@ function parseMissionsContent(raw: Record<string, unknown>): MissionsContent | u
   return {
     date: raw.date,
     daily: parseMissionArray(raw.daily),
-    evolution: parseMissionArray(raw.evolution),
     rerolls: typeof raw.rerolls === 'number' ? Math.max(0, Math.floor(raw.rerolls)) : 0,
   };
 }
 
+/** @internal Exported for use by parseEvolutionContent */
 function parseMissionArray(raw: unknown): Mission[] {
   if (!Array.isArray(raw)) return [];
   const result: Mission[] = [];
diff --git a/src/blobbi/onboarding/lib/blobbi-preview.ts b/src/blobbi/onboarding/lib/blobbi-preview.ts
index c5d63974..1d7252b9 100644
--- a/src/blobbi/onboarding/lib/blobbi-preview.ts
+++ b/src/blobbi/onboarding/lib/blobbi-preview.ts
@@ -201,6 +201,7 @@ export function previewToBlobbiCompanion(preview: BlobbiEggPreview) {
     progressionStartedAt: preview.createdAt,
     tasks: [],
     tasksCompleted: [],
+    evolution: [],
     
     // We need allTags for the adapter, but preview has no extra tags
     allTags: previewToEventTags(preview),
diff --git a/src/pages/BlobbiPage.tsx b/src/pages/BlobbiPage.tsx
index 44386269..2c7b7343 100644
--- a/src/pages/BlobbiPage.tsx
+++ b/src/pages/BlobbiPage.tsx
@@ -1048,19 +1048,19 @@ function BlobbiDashboard({
   const canStartIncubation = isEgg && !isIncubating && !isEvolvingState;
   const canStartEvolution = isBaby && !isEvolvingState && !isIncubating;
   
-  // Daily missions (must be before hatch/evolve tasks which read evolution[] from it)
+  // Daily missions (per-user, kind 11125)
   const dailyMissions = useDailyMissions({ availableStages, profileContent: profile?.content });
   
   // Hatch tasks hook - only active when incubating (egg stage)
+  // Evolution missions now come from companion (kind 31124), not dailyMissions
   const hatchTasks = useHatchTasks(
     isIncubating ? companion : null,
-    dailyMissions.raw,
   );
   
   // Evolve tasks hook - only active when evolving (baby stage)
+  // Evolution missions now come from companion (kind 31124), not dailyMissions
   const evolveTasks = useEvolveTasks(
     isEvolvingState ? companion : null,
-    dailyMissions.raw,
   );
   
   // ─── Unified Task Process Abstraction ───
@@ -1300,8 +1300,8 @@ function BlobbiDashboard({
     setCurrentRoom('kitchen');
   };
 
-  // Persist evolution mission progress (debounced) so it survives page refresh
-  usePersistEvolutionProgress(updateProfileEvent);
+  // Persist evolution mission progress (debounced) to kind 31124 so it survives page refresh
+  usePersistEvolutionProgress(companion.d, updateCompanionEvent);
 
   // Award XP when all daily missions are complete
   const { mutate: awardDailyXp } = useAwardDailyXp(updateProfileEvent);