feat: 品牌替换 + 启动优化 + AGENTS.md 模板定制

- 品牌替换：OpenCode/opencode → AirCoding/aircoding（16+ 文件）
- Logo ASCII art：修复 left/right 行数不匹配导致的启动崩溃
- 启动诊断：添加 OPENCODE_PRINT_TIMING 计时探针
- dev 模式默认 --pure 跳过外部插件加载
- AGENTS.md 模板：追加 AirCoding 多 Agent 专项段落
- architect prompt + plugin：强化 AGENTS.md 产出验证

packages/llm/test/fixtures/recordings/cloudflare-ai-gateway/cloudflare-ai-gateway-workers-ai-llama-3-1-8b-text.json

@@ -0,0 +1,32 @@
+{
+  "version": 1,
+  "metadata": {
+    "name": "cloudflare-ai-gateway/cloudflare-ai-gateway-workers-ai-llama-3-1-8b-text",
+    "recordedAt": "2026-05-08T15:55:48.952Z",
+    "provider": "cloudflare-ai-gateway",
+    "route": "cloudflare-ai-gateway",
+    "transport": "http",
+    "model": "workers-ai/@cf/meta/llama-3.1-8b-instruct",
+    "tags": ["prefix:cloudflare-ai-gateway", "provider:cloudflare-ai-gateway", "text", "golden"]
+  },
+  "interactions": [
+    {
+      "transport": "http",
+      "request": {
+        "method": "POST",
+        "url": "https://gateway.ai.cloudflare.com/v1/{account}/{gateway}/compat/chat/completions",
+        "headers": {
+          "content-type": "application/json"
+        },
+        "body": "{\"model\":\"workers-ai/@cf/meta/llama-3.1-8b-instruct\",\"messages\":[{\"role\":\"system\",\"content\":\"You are concise.\"},{\"role\":\"user\",\"content\":\"Reply exactly with: Hello!\"}],\"stream\":true,\"stream_options\":{\"include_usage\":true},\"max_tokens\":40,\"temperature\":0}"
+      },
+      "response": {
+        "status": 200,
+        "headers": {
+          "content-type": "text/event-stream"
+        },
+        "body": "data: {\"id\":\"id-1778255748911\",\"created\":1778255748,\"model\":\"@cf/meta/llama-3.1-8b-instruct\",\"object\":\"chat.completion.chunk\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"Hello\"}}]}\n\ndata: {\"id\":\"id-1778255748911\",\"created\":1778255748,\"model\":\"@cf/meta/llama-3.1-8b-instruct\",\"object\":\"chat.completion.chunk\",\"choices\":[{\"index\":0,\"delta\":{\"content\":\"!\"}}]}\n\ndata: {\"id\":\"id-1778255748911\",\"object\":\"chat.completion.chunk\",\"created\":1778255748,\"model\":\"@cf/meta/llama-3.1-8b-instruct\",\"choices\":[{\"index\":0,\"delta\":{},\"finish_reason\":\"stop\"}],\"usage\":{\"prompt_tokens\":45,\"completion_tokens\":2,\"total_tokens\":47}}\n\ndata: {\"id\":\"id-1778255748911\",\"object\":\"chat.completion.chunk\",\"created\":1778255748,\"model\":\"@cf/meta/llama-3.1-8b-instruct\",\"choices\":[{\"index\":0,\"delta\":{},\"finish_reason\":\"stop\"}],\"usage\":{\"prompt_tokens\":0,\"completion_tokens\":0,\"total_tokens\":0,\"prompt_tokens_details\":{\"cached_tokens\":0}}}\n\ndata: [DONE]\n\n"
+      }
+    }
+  ]
+}