Function isStub

test/read-cache.test.ts:17–17

(m: Message)

const MARK = '[QodeX context-cache]';
const isStub = (m: Message) => typeof m.content === 'string' && m.content.startsWith(MARK);

describe('read-cache: lossless superseded collapse', () => {
  it('stubs an earlier full read superseded by a later full read; keeps the latest', () => {