治理 Trellis spec 占位噪音与规则口径（05-29-spec-governance-cleanup）

.trellis/spec/backend/index.md

@@ -1,30 +1,26 @@
-# Backend Development Guidelines
+# Backend Spec Redirect
 
 ---
 
 ## Overview
 
-hyb-oa backend work uses Fastify, Prisma and PostgreSQL under `server/`.
-The project-specific backend rules live in `../hyb-oa/backend-fastify-prisma.md`;
-the files in this directory are Trellis default scaffolding and may be expanded
-only when a later task needs deeper backend conventions.
+hyb-oa backend work uses Fastify, Prisma and PostgreSQL under `server/`. The
+active backend rules live in `../hyb-oa/backend-fastify-prisma.md`.
 
----
+This directory intentionally contains no separate backend guideline files. The
+old default scaffold files were removed because placeholder specs are noise for
+future agents.
 
-## Guidelines Index
+## Read
 
 | Guide | Description | Status |
 |-------|-------------|--------|
 | [hyb-oa Backend Rules](../hyb-oa/backend-fastify-prisma.md) | Current project backend rules | Current |
-| [Directory Structure](./directory-structure.md) | Module organization and file layout | Scaffold |
-| [Database Guidelines](./database-guidelines.md) | ORM patterns, queries, migrations | Scaffold |
-| [Error Handling](./error-handling.md) | Error types, handling strategies | Scaffold |
-| [Quality Guidelines](./quality-guidelines.md) | Code standards, forbidden patterns | Scaffold |
-| [Logging Guidelines](./logging-guidelines.md) | Structured logging, log levels | Scaffold |
 
 ---
 
-## Language
+## Rule
 
-Project rules are Chinese-first where they are user-facing. Short English files
-generated by Trellis may remain when they are tool-facing scaffolding.
+Add a new backend spec file only when a later Trellis task discovers concrete,
+source-backed backend conventions that do not belong in the project-level
+backend spec.