feat(wechat): add image generation delivery policy

2026-07-21 23:21:44 +08:00
parent bfb1f6fea9
commit 28581310da
13 changed files with 1078 additions and 19 deletions
@@ -0,0 +1,49 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import {
+  buildWechatPageImageInstruction,
+  buildWechatStandaloneImageInstruction,
+  resolveWechatImageGenerationPolicy,
+  WECHAT_PAGE_THUMBNAIL_MODE,
+} from './image-generation-policy.mjs';
+
+test('service-account page always requires a fresh thumbnail without forcing body images', () => {
+  const policy = resolveWechatImageGenerationPolicy({
+    text: '请做一个苏州旅行页面',
+    isPageGenerate: true,
+    requireFreshPageThumbnail: true,
+  });
+  assert.equal(policy.pageThumbnailMode, WECHAT_PAGE_THUMBNAIL_MODE.REQUIRED_FRESH);
+  assert.equal(policy.imageGenerationMode, 'required');
+  assert.equal(policy.inlineImageMode, 'auto');
+  assert.equal(policy.standaloneImageMode, 'auto');
+  assert.match(buildWechatPageImageInstruction(policy), /每个本轮交付给用户的正式内容页面/);
+});
+
+test('no-image page request disables body images but keeps required fresh thumbnail', () => {
+  const policy = resolveWechatImageGenerationPolicy({
+    text: '生成一个活动页面，只要文字，不要图片',
+    isPageGenerate: true,
+    requireFreshPageThumbnail: true,
+  });
+  assert.equal(policy.pageThumbnailMode, 'required_fresh');
+  assert.equal(policy.inlineImageMode, 'disabled');
+  assert.match(buildWechatPageImageInstruction(policy), /正文和 Hero 不展示图片/);
+});
+
+test('explicit body illustration request is independent from the page thumbnail', () => {
+  const policy = resolveWechatImageGenerationPolicy({
+    text: '生成一个科普页面，每个章节都要正文插图',
+    isPageGenerate: true,
+    requireFreshPageThumbnail: true,
+  });
+  assert.equal(policy.inlineImageMode, 'required');
+});
+
+test('standalone image intent gets an inline_image tool contract', () => {
+  const policy = resolveWechatImageGenerationPolicy({ text: '帮我生成一张雨夜橘猫图片' });
+  assert.equal(policy.standaloneImageMode, 'required');
+  const instruction = buildWechatStandaloneImageInstruction(policy, { sourceMessageId: 'msg-1' });
+  assert.match(instruction, /purpose=`inline_image`/);
+  assert.match(instruction, /idempotency_key=wechat-msg-1-image/);
+});