{"file":".trellis/spec/backend/index.md","reason":"后端开发入口规范"}
{"file":".trellis/spec/backend/quality-guidelines.md","reason":"回归测试和代码质量要求"}
{"file":".trellis/spec/backend/error-handling.md","reason":"API 错误行为要求"}
{"file":".trellis/tasks/08-07-file-preview-encoding/prd.md","reason":"本任务需求与验收标准"}