diff --git a/src/main/ipc/inboxApi.ts b/src/main/ipc/inboxApi.ts
index 6f33776..cbc74cf 100644
--- a/src/main/ipc/inboxApi.ts
+++ b/src/main/ipc/inboxApi.ts
@@ -269,6 +269,29 @@ export function registerInboxApi(deps: InboxIpcDeps): void {
     await deps.health.runOnce();
     return { ok: true };
   });
+
+  // v0.2.10 Cut C — raw_text 가변 + revision 보존.
+  // updateRawText: 빈 문자열 reject (trim 후 length===0). 그 외엔 그대로 (newline/space 보존).
+  // listRevisions: 그대로 반환 (camelCase 이미 hydrate 됨).
+  // restoreRevision: repo throw → { ok: false } (UI 가 에러 표시).
+  ipcMain.handle('inbox:update-raw-text', async (_e, id: string, newText: string) => {
+    if (typeof newText !== 'string' || newText.trim().length === 0) {
+      return { ok: false as const, reason: 'empty' as const };
+    }
+    deps.repo.updateRawText(id, newText);
+    return { ok: true as const };
+  });
+
+  ipcMain.handle('inbox:list-revisions', (_e, id: string) => deps.repo.listRevisions(id));
+
+  ipcMain.handle('inbox:restore-revision', async (_e, id: string, revId: number) => {
+    try {
+      deps.repo.restoreRevision(id, revId);
+      return { ok: true as const };
+    } catch (e) {
+      return { ok: false as const, reason: (e as Error).message };
+    }
+  });
 }
 
 export function pushNoteUpdated(getWin: () => BrowserWindow | null, note: Note): void {
diff --git a/tests/unit/inboxApi-revisions.test.ts b/tests/unit/inboxApi-revisions.test.ts
new file mode 100644
index 0000000..9675dfb
--- /dev/null
+++ b/tests/unit/inboxApi-revisions.test.ts
@@ -0,0 +1,99 @@
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+
+vi.mock('electron', () => ({
+  default: {
+    ipcMain: { handle: vi.fn() }
+  }
+}));
+
+import electron from 'electron';
+import { registerInboxApi } from '../../src/main/ipc/inboxApi.js';
+import type { InboxIpcDeps } from '../../src/main/ipc/inboxApi.js';
+
+function getHandler(channel: string): (...args: unknown[]) => unknown {
+  const handle = (electron.ipcMain as unknown as { handle: ReturnType<typeof vi.fn> }).handle;
+  const call = handle.mock.calls.find((c) => c[0] === channel);
+  if (!call) throw new Error(`channel ${channel} not registered`);
+  return call[1] as (...args: unknown[]) => unknown;
+}
+
+function makeDeps(overrides: Partial<InboxIpcDeps> = {}): InboxIpcDeps {
+  const repo = {
+    updateRawText: vi.fn(),
+    listRevisions: vi.fn(() => []),
+    restoreRevision: vi.fn(),
+    findById: vi.fn(),
+    list: vi.fn(),
+    listByStatus: vi.fn(),
+    countByStatus: vi.fn(() => 0),
+    countByAiStatus: vi.fn(() => 0),
+    countTrashed: vi.fn(() => 0),
+    countFailed: vi.fn(() => 0),
+    listTrashed: vi.fn(() => []),
+    setStatus: vi.fn(),
+    requeueDisabled: vi.fn(() => 0),
+    getAllPendingJobs: vi.fn(() => []),
+    getPendingCount: vi.fn(() => 0),
+    countToday: vi.fn(() => 0)
+  } as unknown as InboxIpcDeps['repo'];
+  return {
+    repo,
+    continuity: { get: vi.fn() } as unknown as InboxIpcDeps['continuity'],
+    capture: {} as InboxIpcDeps['capture'],
+    health: {} as InboxIpcDeps['health'],
+    intent: {} as InboxIpcDeps['intent'],
+    getInboxWindow: () => null,
+    settings: {} as InboxIpcDeps['settings'],
+    providerHolder: {} as InboxIpcDeps['providerHolder'],
+    paths: { profileDir: '/tmp' },
+    ...overrides
+  };
+}
+
+describe('inboxApi revisions IPC', () => {
+  beforeEach(() => {
+    (electron.ipcMain as unknown as { handle: ReturnType<typeof vi.fn> }).handle.mockClear();
+  });
+
+  it('inbox:update-raw-text — repo.updateRawText 호출 + ok:true', async () => {
+    const deps = makeDeps();
+    registerInboxApi(deps);
+    const h = getHandler('inbox:update-raw-text');
+    const r = await h({}, 'note-1', 'new text');
+    expect(deps.repo.updateRawText).toHaveBeenCalledWith('note-1', 'new text');
+    expect(r).toEqual({ ok: true });
+  });
+
+  it('inbox:update-raw-text — 빈 문자열 reject', async () => {
+    const deps = makeDeps();
+    registerInboxApi(deps);
+    const h = getHandler('inbox:update-raw-text');
+    const r = await h({}, 'note-1', '   ');
+    expect(deps.repo.updateRawText).not.toHaveBeenCalled();
+    expect(r).toEqual({ ok: false, reason: 'empty' });
+  });
+
+  it('inbox:list-revisions — repo.listRevisions 결과 반환', async () => {
+    const deps = makeDeps();
+    (deps.repo.listRevisions as ReturnType<typeof vi.fn>).mockReturnValue([
+      { revId: 1, noteId: 'a', rawText: 'v1', editedAt: 't1', editedBy: 'capture' }
+    ]);
+    registerInboxApi(deps);
+    const h = getHandler('inbox:list-revisions');
+    const r = await h({}, 'a');
+    expect(r).toEqual([
+      { revId: 1, noteId: 'a', rawText: 'v1', editedAt: 't1', editedBy: 'capture' }
+    ]);
+  });
+
+  it('inbox:restore-revision — repo throw 시 ok:false', async () => {
+    const deps = makeDeps();
+    (deps.repo.restoreRevision as ReturnType<typeof vi.fn>).mockImplementation(() => {
+      throw new Error('revision 99 not found for note a');
+    });
+    registerInboxApi(deps);
+    const h = getHandler('inbox:restore-revision');
+    const r = await h({}, 'a', 99);
+    expect(r).toEqual({ ok: false, reason: 'revision 99 not found for note a' });
+  });
+});