Method createImportedSession

packages/storage/src/session-store.ts:403–428

(
    input: CreateSessionInput,
    messages: readonly StoredMessage[],
  )

  }

  async createImportedSession(
    input: CreateSessionInput,
    messages: readonly StoredMessage[],
  ): Promise<SessionHeader> {
    await this.ensureReady();
    assertNoConversationCopyMetadata(input);
    if (input.subagentSpawn) {
      throw new Error('Subagent spawn metadata requires createSubagent()');
    }
    const canonicalMessages = messages.map((message) =>
      decodeStoredMessage(JSON.parse(JSON.stringify(message)) as unknown),
    );
    const header: SessionHeader = {
      ...buildSessionHeader(this.workspaceRoot, input),
      transcriptLedgerVersion: 0,
    };
    const outcome = await this.metadata.importSession(
      header,
      canonicalMessages,
      projectSessionCatalogMessages(canonicalMessages),
    );
    if (outcome !== 'imported') {
      throw new Error(`Generated Session id already exists: ${header.id}`);
    }
    return (await this.metadata.read(header.id)).header;
  }

  async probeStableSessionCreate(
    sessionId: string,