diff --git a/src/conversation.ts b/src/conversation.ts
index 21fa5b0..c6aef33 100644
--- a/src/conversation.ts
+++ b/src/conversation.ts
@@ -5,36 +5,39 @@ import type {
   MemorySpace,
   PersonaMessage,
   ScheduledAvailabilitySnapshot,
-} from './types';
-import { addUtcDays, buildAvailabilitySnapshot, dateKeysAround, startOfUtcDay, toIso } from './schedule';
+} from "./types";
+import { addUtcDays, dateKeysAround, startOfUtcDay, toIso } from "./schedule";
 
-export function formatMessageHistory(input: { personaName: string; messages: PersonaMessage[] }): string {
+export function formatMessageHistory(input: {
+  personaName: string;
+  messages: PersonaMessage[];
+}): string {
   return input.messages
     .map((message) => {
-      const sender = message.sender === 'persona' ? input.personaName : 'user';
+      const sender = message.sender === "persona" ? input.personaName : "user";
       return `${sender}@${toIso(message.time)}: ${message.content}`;
     })
-    .join('\n');
+    .join("\n");
 }
 
 export function conversationInstruction(): string {
   return [
-    'You are controlling the persona, not a generic assistant.',
-    'Use the send_message tool conceptually: return one or more outgoing messages.',
-    'Unless the persona strongly prefers otherwise, keep each outgoing message to at most one sentence.',
-    'Prefer short, natural, chat-like wording and allow splitting one thought into multiple messages.',
+    "You are controlling the persona, not a generic assistant.",
+    "Use the send_message tool conceptually: return one or more outgoing messages.",
+    "Unless the persona strongly prefers otherwise, keep each outgoing message to at most one sentence.",
+    "Prefer short, natural, chat-like wording and allow splitting one thought into multiple messages.",
     'If mandatory memory says "기억이 없음", the persona may naturally wonder about missing context instead of pretending to remember.',
-  ].join('\n');
+  ].join("\n");
 }
 
 export function memoryExtractionInstruction(now: string): string {
   return [
     `Current objective time: ${now}.`,
-    'Read the message history and extract durable facts worth remembering.',
-    'Objectivize subjective statements before storage.',
+    "Read the message history and extract durable facts worth remembering.",
+    "Objectivize subjective statements before storage.",
     'Example: "I started TypeScript in 2025" becomes "The user started TypeScript in 2025."',
-    'Prefer facts about the persona, the user, their relationship, preferences, history, schedule-relevant events, and stable traits.',
-  ].join('\n');
+    "Prefer facts about the persona, the user, their relationship, preferences, history, schedule-relevant events, and stable traits.",
+  ].join("\n");
 }
 
 export async function buildMandatoryConversationContext(input: {
@@ -47,15 +50,27 @@ export async function buildMandatoryConversationContext(input: {
   const now = startOfUtcDay(input.now);
   const from = addUtcDays(now, -1).toISOString();
   const to = addUtcDays(now, 2).toISOString();
-  const scheduleEntries = await input.memory.listScheduleEntries(input.persona.id, from, to);
-  const personaAndUserFacts = await input.memory.findFacts(input.persona.id, ['persona', input.persona.displayName, 'user']);
-  const memorySummary = personaAndUserFacts.length === 0
-    ? '기억이 없음'
-    : personaAndUserFacts.map((fact) => `- ${fact.statement}`).join('\n');
+  const scheduleEntries = await input.memory.listScheduleEntries(
+    input.persona.id,
+    from,
+    to,
+  );
+  const personaAndUserFacts = await input.memory.findFacts(input.persona.id, [
+    "persona",
+    input.persona.displayName,
+    "user",
+  ]);
+  const memorySummary =
+    personaAndUserFacts.length === 0
+      ? "기억이 없음"
+      : personaAndUserFacts.map((fact) => `- ${fact.statement}`).join("\n");
 
   return {
-    formattedMessageHistory: formatMessageHistory({ personaName: input.persona.displayName, messages: input.messages }),
-    conversationWindowLabel: `Required conversation window: yesterday/today. Schedule dates: ${dateKeysAround(input.now).join(', ')}.`,
+    formattedMessageHistory: formatMessageHistory({
+      personaName: input.persona.displayName,
+      messages: input.messages,
+    }),
+    conversationWindowLabel: `Required conversation window: yesterday/today. Schedule dates: ${dateKeysAround(input.now).join(", ")}.`,
     memorySummary,
     personaAndUserFacts,
     scheduleEntries,
diff --git a/src/persona.ts b/src/persona.ts
index 5cbd237..ce4e754 100644
--- a/src/persona.ts
+++ b/src/persona.ts
@@ -1,4 +1,4 @@
-import { InMemoryMemoryStore } from './memory';
+import { InMemoryMemoryStore } from "./memory";
 import {
   addUtcDays,
   blocksToDailySchedule,
@@ -9,13 +9,13 @@ import {
   scheduleTargetDay,
   startOfUtcDay,
   toIso,
-} from './schedule';
+} from "./schedule";
 import {
   buildMandatoryConversationContext,
   conversationInstruction,
   formatMessageHistory,
   memoryExtractionInstruction,
-} from './conversation';
+} from "./conversation";
 import type {
   BoxBrainMemoryStore,
   DateTimeInput,
@@ -27,28 +27,31 @@ import type {
   PersonaOptions,
   ScheduleEntry,
   ScheduledAvailabilitySnapshot,
-} from './types';
+} from "./types";
 
 interface CreateMode {
-  type: 'create';
+  type: "create";
   displayName: string;
   seedMessage: string;
 }
 
 interface LoadMode {
-  type: 'load';
+  type: "load";
   spaceId: string;
 }
 
 type Mode = CreateMode | LoadMode;
 
-function defaultInitialFact(displayName: string, seedMessage: string): FactDraft {
+function defaultInitialFact(
+  displayName: string,
+  seedMessage: string,
+): FactDraft {
   return {
     statement: `${displayName} is a BoxBrain persona initialized from this seed: ${seedMessage}`,
-    topics: ['persona', displayName],
-    source: 'boxbrain.persona.initialization',
+    topics: ["persona", displayName],
+    source: "boxbrain.persona.initialization",
     confidence: 1,
-    metadata: { boxbrainType: 'persona-initial-fact' },
+    metadata: { boxbrainType: "persona-initial-fact" },
   };
 }
 
@@ -66,14 +69,22 @@ export class Persona {
   private readonly readyPromise: Promise<MemorySpace>;
   private availabilitySnapshot?: ScheduledAvailabilitySnapshot;
 
-  constructor(displayName: string, seedMessage: string, options?: PersonaOptions);
+  constructor(
+    displayName: string,
+    seedMessage: string,
+    options?: PersonaOptions,
+  );
   constructor(spaceId: string, options?: PersonaOptions);
-  constructor(first: string, second?: string | PersonaOptions, third?: PersonaOptions) {
-    if (typeof second === 'string') {
-      this.mode = { type: 'create', displayName: first, seedMessage: second };
+  constructor(
+    first: string,
+    second?: string | PersonaOptions,
+    third?: PersonaOptions,
+  ) {
+    if (typeof second === "string") {
+      this.mode = { type: "create", displayName: first, seedMessage: second };
       this.options = third ?? {};
     } else {
-      this.mode = { type: 'load', spaceId: first };
+      this.mode = { type: "load", spaceId: first };
       this.options = second ?? {};
     }
     this.memory = this.options.memory ?? new InMemoryMemoryStore();
@@ -84,10 +95,17 @@ export class Persona {
     return this.readyPromise;
   }
 
-  async createDailySchedule(datetime: DateTimeInput, message: string): Promise<ScheduleEntry[]> {
+  get spaceId(): Promise<string> {
+    return this.readyPromise.then((v) => v.id);
+  }
+
+  async createDailySchedule(
+    datetime: DateTimeInput,
+    message: string,
+  ): Promise<ScheduleEntry[]> {
     const persona = await this.ready();
     if (!this.options.models?.schedule) {
-      throw new Error('createDailySchedule requires options.models.schedule.');
+      throw new Error("createDailySchedule requires options.models.schedule.");
     }
     const targetDay = scheduleTargetDay(datetime);
     const blocks = await this.options.models.schedule.generateDailySchedule({
@@ -96,17 +114,31 @@ export class Persona {
       message,
       instruction: scheduleInstruction(),
     });
-    const entries = blocksToDailySchedule({ persona, targetDay, message, blocks });
-    await this.emit('persona.schedule.daily.generated', { targetDay: targetDay.toISOString(), count: entries.length, message });
+    const entries = blocksToDailySchedule({
+      persona,
+      targetDay,
+      message,
+      blocks,
+    });
+    await this.emit("persona.schedule.daily.generated", {
+      targetDay: targetDay.toISOString(),
+      count: entries.length,
+      message,
+    });
     await this.memory.saveScheduleEntries(persona.id, entries);
     await this.refreshAvailability(datetime);
     return entries;
   }
 
-  async createMonthlySchedule(datetime: DateTimeInput, message: string): Promise<ScheduleEntry[]> {
+  async createMonthlySchedule(
+    datetime: DateTimeInput,
+    message: string,
+  ): Promise<ScheduleEntry[]> {
     const persona = await this.ready();
     if (!this.options.models?.schedule) {
-      throw new Error('createMonthlySchedule requires options.models.schedule.');
+      throw new Error(
+        "createMonthlySchedule requires options.models.schedule.",
+      );
     }
     const fromDay = scheduleTargetDay(datetime);
     const days = daysInMonth(fromDay);
@@ -117,8 +149,16 @@ export class Persona {
       days,
       instruction: scheduleInstruction(),
     });
-    const entries = blocksToMonthlySchedule({ persona, fromDay, message, blocks });
-    await this.emit('persona.schedule.monthly.generated', { count: entries.length, message });
+    const entries = blocksToMonthlySchedule({
+      persona,
+      fromDay,
+      message,
+      blocks,
+    });
+    await this.emit("persona.schedule.monthly.generated", {
+      count: entries.length,
+      message,
+    });
     await this.memory.saveScheduleEntries(persona.id, entries);
     await this.refreshAvailability(datetime);
     return entries;
@@ -127,14 +167,24 @@ export class Persona {
   async deleteSchedulesBefore(cutoffExclusive: DateTimeInput): Promise<number> {
     const persona = await this.ready();
     const cutoff = toIso(cutoffExclusive);
-    const deleted = await this.memory.deleteScheduleEntriesBefore(persona.id, cutoff);
+    const deleted = await this.memory.deleteScheduleEntriesBefore(
+      persona.id,
+      cutoff,
+    );
     await this.memory.addFact(persona.id, {
       statement: `Schedules before ${cutoff} were deleted or marked inactive.`,
-      topics: ['persona.schedule.deleted', 'schedule', cutoff.slice(0, 10)],
-      source: 'boxbrain.schedule.prune',
-      metadata: { boxbrainType: 'schedule-deletion', cutoffExclusive: cutoff, deleted },
+      topics: ["persona.schedule.deleted", "schedule", cutoff.slice(0, 10)],
+      source: "boxbrain.schedule.prune",
+      metadata: {
+        boxbrainType: "schedule-deletion",
+        cutoffExclusive: cutoff,
+        deleted,
+      },
+    });
+    await this.emit("persona.schedule.deleted", {
+      cutoffExclusive: cutoff,
+      deleted,
     });
-    await this.emit('persona.schedule.deleted', { cutoffExclusive: cutoff, deleted });
     return deleted;
   }
 
@@ -142,12 +192,15 @@ export class Persona {
     return this.deleteSchedulesBefore(datetime);
   }
 
-  async getTodayScheduledAvailability(datetime: DateTimeInput): Promise<ScheduledAvailabilitySnapshot> {
+  async getTodayScheduledAvailability(
+    datetime: DateTimeInput,
+  ): Promise<ScheduledAvailabilitySnapshot> {
     if (!this.availabilitySnapshot) {
       await this.refreshAvailability(datetime);
     }
     const snapshot = this.availabilitySnapshot;
-    if (!snapshot) throw new Error('Availability snapshot was not initialized.');
+    if (!snapshot)
+      throw new Error("Availability snapshot was not initialized.");
 
     const today = startOfUtcDay(datetime).toISOString();
     if (snapshot.windowStartAt !== today) {
@@ -155,7 +208,8 @@ export class Persona {
     }
 
     const refreshed = this.availabilitySnapshot;
-    if (!refreshed) throw new Error('Availability snapshot was not initialized.');
+    if (!refreshed)
+      throw new Error("Availability snapshot was not initialized.");
     return refreshed;
   }
 
@@ -166,9 +220,11 @@ export class Persona {
   }): Promise<OutgoingMessageDraft> {
     const persona = await this.ready();
     if (!this.options.models?.conversation) {
-      throw new Error('sendMessage requires options.models.conversation.');
+      throw new Error("sendMessage requires options.models.conversation.");
     }
-    const availability = await this.getTodayScheduledAvailability(input.datetime);
+    const availability = await this.getTodayScheduledAvailability(
+      input.datetime,
+    );
     const context = await buildMandatoryConversationContext({
       persona,
       now: input.datetime,
@@ -176,20 +232,24 @@ export class Persona {
       messages: input.messageHistory,
       availability,
     });
-    await this.emit('persona.conversation.context.loaded', {
+    await this.emit("persona.conversation.context.loaded", {
       factCount: context.personaAndUserFacts.length,
       scheduleEntryCount: context.scheduleEntries.length,
     });
 
-    const userMessage = [...input.messageHistory].reverse().find((message) => message.sender === 'user')?.content;
-    let draft = ensureDraft(await this.options.models.conversation.generateReply({
-      persona,
-      now: toIso(input.datetime),
-      mode: 'reply',
-      context,
-      ...(userMessage === undefined ? {} : { userMessage }),
-      instruction: conversationInstruction(),
-    }));
+    const userMessage = [...input.messageHistory]
+      .reverse()
+      .find((message) => message.sender === "user")?.content;
+    let draft = ensureDraft(
+      await this.options.models.conversation.generateReply({
+        persona,
+        now: toIso(input.datetime),
+        mode: "reply",
+        context,
+        ...(userMessage === undefined ? {} : { userMessage }),
+        instruction: conversationInstruction(),
+      }),
+    );
 
     if (input.getLatestMessageHistory && this.options.models.rewrite) {
       const latest = await input.getLatestMessageHistory();
@@ -209,20 +269,28 @@ export class Persona {
           draft,
           context: latestContext,
         });
-        await this.emit('persona.conversation.rewrite.checked', { rewrite: decision.rewrite, reason: decision.reason ?? null });
+        await this.emit("persona.conversation.rewrite.checked", {
+          rewrite: decision.rewrite,
+          reason: decision.reason ?? null,
+        });
         if (decision.rewrite) {
-          draft = ensureDraft(decision.draft ?? await this.options.models.conversation.generateReply({
-            persona,
-            now: toIso(input.datetime),
-            mode: 'reply',
-            context: latestContext,
-            instruction: conversationInstruction(),
-          }));
+          draft = ensureDraft(
+            decision.draft ??
+              (await this.options.models.conversation.generateReply({
+                persona,
+                now: toIso(input.datetime),
+                mode: "reply",
+                context: latestContext,
+                instruction: conversationInstruction(),
+              })),
+          );
         }
       }
     }
 
-    await this.emit('persona.conversation.reply.generated', { messageCount: draft.messages.length });
+    await this.emit("persona.conversation.reply.generated", {
+      messageCount: draft.messages.length,
+    });
     return draft;
   }
 
@@ -232,9 +300,13 @@ export class Persona {
   }): Promise<OutgoingMessageDraft> {
     const persona = await this.ready();
     if (!this.options.models?.conversation) {
-      throw new Error('startConversation requires options.models.conversation.');
+      throw new Error(
+        "startConversation requires options.models.conversation.",
+      );
     }
-    const availability = await this.getTodayScheduledAvailability(input.datetime);
+    const availability = await this.getTodayScheduledAvailability(
+      input.datetime,
+    );
     const context = await buildMandatoryConversationContext({
       persona,
       now: input.datetime,
@@ -242,14 +314,18 @@ export class Persona {
       messages: input.messageHistory,
       availability,
     });
-    const draft = ensureDraft(await this.options.models.conversation.generateReply({
-      persona,
-      now: toIso(input.datetime),
-      mode: 'start-conversation',
-      context,
-      instruction: conversationInstruction(),
-    }));
-    await this.emit('persona.conversation.started', { messageCount: draft.messages.length });
+    const draft = ensureDraft(
+      await this.options.models.conversation.generateReply({
+        persona,
+        now: toIso(input.datetime),
+        mode: "start-conversation",
+        context,
+        instruction: conversationInstruction(),
+      }),
+    );
+    await this.emit("persona.conversation.started", {
+      messageCount: draft.messages.length,
+    });
     return draft;
   }
 
@@ -259,64 +335,102 @@ export class Persona {
   }): Promise<FactDraft[]> {
     const persona = await this.ready();
     if (!this.options.models?.memoryExtraction) {
-      throw new Error('sleepMemory requires options.models.memoryExtraction.');
+      throw new Error("sleepMemory requires options.models.memoryExtraction.");
     }
-    const contextFacts = await this.memory.findFacts(persona.id, ['persona', persona.displayName, 'user']);
+    const contextFacts = await this.memory.findFacts(persona.id, [
+      "persona",
+      persona.displayName,
+      "user",
+    ]);
     const drafts = await this.options.models.memoryExtraction.extract({
       persona,
       now: toIso(input.datetime),
-      formattedMessageHistory: formatMessageHistory({ personaName: persona.displayName, messages: input.messageHistory }),
+      formattedMessageHistory: formatMessageHistory({
+        personaName: persona.displayName,
+        messages: input.messageHistory,
+      }),
       contextFacts,
       instruction: memoryExtractionInstruction(toIso(input.datetime)),
     });
     for (const draft of drafts) {
       await this.memory.addFact(persona.id, {
         ...draft,
-        topics: [...draft.topics, 'sleepMemory'],
-        source: draft.source ?? 'boxbrain.sleepMemory',
+        topics: [...draft.topics, "sleepMemory"],
+        source: draft.source ?? "boxbrain.sleepMemory",
       });
     }
-    await this.emit('persona.memory.sleep.persisted', { factCount: drafts.length });
+    await this.emit("persona.memory.sleep.persisted", {
+      factCount: drafts.length,
+    });
     return drafts;
   }
 
   private async initialize(): Promise<MemorySpace> {
     const now = toIso(this.options.now ?? new Date());
-    if (this.mode.type === 'load') {
+    if (this.mode.type === "load") {
       const existing = await this.memory.getSpace(this.mode.spaceId);
-      if (!existing) throw new Error(`Persona space not found: ${this.mode.spaceId}`);
-      await this.emit('persona.loaded', { displayName: existing.displayName });
+      if (!existing)
+        throw new Error(`Persona space not found: ${this.mode.spaceId}`);
+      await this.emit("persona.loaded", { displayName: existing.displayName });
       await this.refreshAvailability(now, existing);
       return existing;
     }
 
-    const space = await this.memory.createSpace({ displayName: this.mode.displayName, seedMessage: this.mode.seedMessage, now });
+    const space = await this.memory.createSpace({
+      displayName: this.mode.displayName,
+      seedMessage: this.mode.seedMessage,
+      now,
+    });
     const modelFacts = this.options.models?.initialization
       ? await this.options.models.initialization.extractInitialFacts({
-        displayName: this.mode.displayName,
-        seedMessage: this.mode.seedMessage,
-        now,
-      })
+          displayName: this.mode.displayName,
+          seedMessage: this.mode.seedMessage,
+          now,
+        })
       : undefined;
-    const facts = modelFacts ?? [defaultInitialFact(this.mode.displayName, this.mode.seedMessage)];
+    const facts = modelFacts ?? [
+      defaultInitialFact(this.mode.displayName, this.mode.seedMessage),
+    ];
     for (const fact of facts) {
       await this.memory.addFact(space.id, fact);
     }
-    await this.emit('persona.initialized', { displayName: space.displayName, factCount: facts.length }, space.id);
+    await this.emit(
+      "persona.initialized",
+      { displayName: space.displayName, factCount: facts.length },
+      space.id,
+    );
     await this.refreshAvailability(now, space);
     return space;
   }
 
-  private async refreshAvailability(datetime: DateTimeInput, knownPersona?: MemorySpace): Promise<void> {
-    const persona = knownPersona ?? await this.ready();
+  private async refreshAvailability(
+    datetime: DateTimeInput,
+    knownPersona?: MemorySpace,
+  ): Promise<void> {
+    const persona = knownPersona ?? (await this.ready());
     const start = startOfUtcDay(datetime);
     const end = addUtcDays(start, 2);
-    const entries = await this.memory.listScheduleEntries(persona.id, start.toISOString(), end.toISOString());
-    this.availabilitySnapshot = buildAvailabilitySnapshot({ now: datetime, entries });
-    await this.emit('persona.availability.refreshed', { rangeCount: this.availabilitySnapshot.ranges.length }, persona.id);
+    const entries = await this.memory.listScheduleEntries(
+      persona.id,
+      start.toISOString(),
+      end.toISOString(),
+    );
+    this.availabilitySnapshot = buildAvailabilitySnapshot({
+      now: datetime,
+      entries,
+    });
+    await this.emit(
+      "persona.availability.refreshed",
+      { rangeCount: this.availabilitySnapshot.ranges.length },
+      persona.id,
+    );
   }
 
-  private async emit(name: string, data?: Record<string, unknown>, explicitSpaceId?: string): Promise<void> {
+  private async emit(
+    name: string,
+    data?: Record<string, unknown>,
+    explicitSpaceId?: string,
+  ): Promise<void> {
     if (!this.options.debug) return;
     const event: DebugEvent = {
       name,