feat: add cache rebuild flag and progress

tests/parse-progress.test.ts

@@ -0,0 +1,25 @@
+import { describe, expect, it, vi } from 'vitest'
+
+import { createTerminalProgressReporter } from '../src/parse-progress.js'
+
+describe('createTerminalProgressReporter', () => {
+  it('renders Updating cache progress lines to stderr-compatible streams', () => {
+    const writes: string[] = []
+    const stream = {
+      isTTY: true,
+      write: vi.fn((chunk: string) => {
+        writes.push(chunk)
+        return true
+      }),
+    } as unknown as NodeJS.WriteStream
+
+    const reporter = createTerminalProgressReporter(true, stream)
+    reporter?.start('Updating cache', 2)
+    reporter?.advance('claude/session.jsonl')
+    reporter?.advance('codex/rollout.jsonl')
+    reporter?.finish()
+
+    expect(writes.join('')).toContain('Updating cache')
+    expect(writes.join('')).toContain('2/2')
+  })
+})