diff --git a/BACKEND_NAMING_AUDIT.md b/BACKEND_NAMING_AUDIT.md
new file mode 100644
index 0000000..dc5572b
--- /dev/null
+++ b/BACKEND_NAMING_AUDIT.md
@@ -0,0 +1,77 @@
+# Backend Naming Audit
+
+DOC-003 audit for the internal `TJWaterServerBinary` backend.
+
+## Scope
+
+Reviewed FastAPI route decorators under `app/api/v1/endpoints`, router prefixes in `app/api/v1/router.py`, and public request/response schema fields in `app/api` and `app/domain`.
+
+The backend is mounted only under `/api/v1` from `app/main.py`; the old no-prefix router include remains commented out.
+
+## Current Good Surface
+
+These newer routes already follow the naming rule for public HTTP paths:
+
+- Metadata/admin: `/api/v1/admin/projects`, `/api/v1/admin/users/sync`, `/api/v1/admin/projects/{project_id}/members`
+- Audit: `/api/v1/audit/logs`, `/api/v1/audit/logs/count`
+- Agent auth: `/api/v1/agent/auth/context`
+- Business APIs: `/api/v1/burst-detection/detect`, `/api/v1/burst-location/locate`, `/api/v1/leakage/identify`
+- Time-series APIs: `/api/v1/scada/by-ids-time-range`, `/api/v1/scada/by-ids-field-time-range`, `/api/v1/composite/clean-scada`
+- Project data APIs: `/api/v1/scada-info`, `/api/v1/scheme-list`, `/api/v1/burst-locate-result`
+- Web integrations: `/api/v1/web-search`, `/api/v1/geocode`
+
+Path template parameters such as `{project_id}`, `{user_id}`, `{device_id}`, `{scheme_name}`, and `{link_id}` intentionally remain `snake_case`.
+
+## Legacy URL Categories
+
+### Keep With Compatibility
+
+These now have `kebab-case` aliases. The frontend has been migrated to the replacement paths; keep the old paths as deprecated compatibility aliases for Agent planning, tests, customer scripts, or external callers:
+
+| Current URL | Suggested replacement |
+| --- | --- |
+| `/api/v1/openproject/` | `/api/v1/projects/open` |
+| `/api/v1/project_info/` | `/api/v1/project-info` |
+| `/api/v1/getallschemes/` | `/api/v1/schemes` |
+| `/api/v1/getallsensorplacements/` | `/api/v1/sensor-placement-schemes` |
+| `/api/v1/sensorplacementscheme/create` | `/api/v1/sensor-placement-schemes` |
+| `/api/v1/burst_analysis/` | `/api/v1/burst-analysis` |
+| `/api/v1/valve_isolation_analysis/` | `/api/v1/valve-isolation-analysis` |
+| `/api/v1/flushing_analysis/` | `/api/v1/flushing-analysis` |
+| `/api/v1/contaminant_simulation/` | `/api/v1/contaminant-simulation` |
+| `/api/v1/runsimulationmanuallybydate/` | `/api/v1/simulations/run-by-date` |
+
+### Broad Legacy Surface
+
+These route groups expose many command-style concatenated paths. They should not be copied into new work; replace only when a caller migration is planned:
+
+- Project lifecycle: `listprojects`, `createproject`, `deleteproject`, `isprojectopen`, `closeproject`, `copyproject`, `importinp`, `exportinp`, `readinp`, `dumpinp`, `lockproject`, `unlockproject`
+- Network object CRUD: `addjunction`, `getjunctionelevation`, `setpipediameter`, `getvalvesetting`, and similar junction/pipe/pump/tank/reservoir/valve routes
+- Region/DMA/VD commands: `calculatedistrictmeteringareaforregion`, `getdistrictmeteringarea`, `generatevirtualdistrict`, and related routes
+- SCADA native CRUD: `getscadadevice`, `setscadadevicedata`, `cleanscadaelement`, and related routes
+- Snapshot/cache utilities: `takesnapshotforoperation`, `syncwithserver`, `clearrediskey`, `queryredis`
+- Advanced simulation endpoints with underscore paths: `pressure_regulation`, `daily_scheduling_analysis`, `network_update`, `pressure_sensor_placement_kmeans`
+
+### Direct Cleanup Candidates
+
+These are likely safe only after confirming no caller uses them:
+
+- `/api/v1/test_dict/`: development/test utility in `misc.py`.
+- `/api/v1/takenapshotforcurrentoperation`: typo compatibility path; keep deprecated if any client may still call it.
+- `/api/v1/getpumpenergyproperties//` and `/api/v1/setpumpenergyproperties//`: double-slash paths in options endpoints.
+
+## Field Naming
+
+Most public JSON, query, and SSE fields are already `snake_case`, including `project_id`, `user_id`, `scheme_name`, `scheme_type`, `start_time`, `end_time`, `device_ids`, `session_id`, and `request_id`.
+
+Known legacy exception:
+
+- `BurstAnalysis.burst_ID` in `app/api/v1/endpoints/simulation.py` should become `burst_id` on a new API contract. Preserve `burst_ID` only for the legacy body shape.
+
+Headers keep standard HTTP casing:
+
+- `X-Project-Id`
+
+## Recommendation
+
+Do not rename existing legacy routes in place. For each active legacy route, keep the new `kebab-case` alias as the documented path, keep the old route marked deprecated, migrate remaining Agent/customer/script callers, then remove only after a documented compatibility window.
diff --git a/app/api/v1/endpoints/misc.py b/app/api/v1/endpoints/misc.py
index 248032f..5500268 100644
--- a/app/api/v1/endpoints/misc.py
+++ b/app/api/v1/endpoints/misc.py
@@ -28,7 +28,8 @@ async def fastapi_get_json():
     )
 
 
-@router.get("/getallsensorplacements/", summary="获取所有传感器位置", description="获取网络中所有传感器的放置位置信息")
+@router.get("/sensor-placement-schemes", summary="获取所有传感器位置", description="获取网络中所有传感器的放置位置信息")
+@router.get("/getallsensorplacements/", summary="获取所有传感器位置（旧路径）", description="获取网络中所有传感器的放置位置信息", deprecated=True)
 async def fastapi_get_all_sensor_placements(network: str = Query(..., description="管网名称（或数据库名称）")) -> list[dict[Any, Any]]:
     """
     获取所有传感器位置
diff --git a/app/api/v1/endpoints/project.py b/app/api/v1/endpoints/project.py
index 3b8cc45..c4424ba 100644
--- a/app/api/v1/endpoints/project.py
+++ b/app/api/v1/endpoints/project.py
@@ -42,7 +42,8 @@ inpDir = "data/" # Assuming data directory exists or is defined somewhere.
 router = APIRouter()
 lockedPrjs: Dict[str, str] = {}
 
-@router.get("/project_info/", summary="获取项目信息", description="从数据库获取项目的详细信息，包括地图范围等。", response_model=ProjectMetaResponse)
+@router.get("/project-info", summary="获取项目信息", description="从数据库获取项目的详细信息，包括地图范围等。", response_model=ProjectMetaResponse)
+@router.get("/project_info/", summary="获取项目信息（旧路径）", description="从数据库获取项目的详细信息，包括地图范围等。", response_model=ProjectMetaResponse, deprecated=True)
 async def get_project_info_endpoint(
     network: str = Query(..., description="管网名称（或项目代码）"),
     metadata_repo: MetadataRepository = Depends(get_metadata_repository),
@@ -121,7 +122,8 @@ async def is_project_open_endpoint(
     """
     return is_project_open(network)
 
-@router.post("/openproject/", summary="打开项目", description="将指定项目加载到内存中，并初始化数据库连接池。")
+@router.post("/projects/open", summary="打开项目", description="将指定项目加载到内存中，并初始化数据库连接池。")
+@router.post("/openproject/", summary="打开项目（旧路径）", description="将指定项目加载到内存中，并初始化数据库连接池。", deprecated=True)
 async def open_project_endpoint(
     network: str = Query(..., description="管网名称（或数据库名称）")
 ):
diff --git a/app/api/v1/endpoints/schemes.py b/app/api/v1/endpoints/schemes.py
index 3b650e4..a08746e 100644
--- a/app/api/v1/endpoints/schemes.py
+++ b/app/api/v1/endpoints/schemes.py
@@ -22,7 +22,8 @@ async def fastapi_get_scheme(network: str = Query(..., description="管网名称
     """
     return get_scheme(network, schema_name)
 
-@router.get("/getallschemes/", summary="获取所有方案", description="获取指定网络的所有方案信息")
+@router.get("/schemes", summary="获取所有方案", description="获取指定网络的所有方案信息")
+@router.get("/getallschemes/", summary="获取所有方案（旧路径）", description="获取指定网络的所有方案信息", deprecated=True)
 async def fastapi_get_all_schemes(network: str = Query(..., description="管网名称（或数据库名称）")) -> list[dict[Any, Any]]:
     """
     获取所有方案列表
diff --git a/app/api/v1/endpoints/simulation.py b/app/api/v1/endpoints/simulation.py
index 27be343..c8ad1f4 100644
--- a/app/api/v1/endpoints/simulation.py
+++ b/app/api/v1/endpoints/simulation.py
@@ -188,7 +188,8 @@ async def dump_output_endpoint(output: str = Query(..., description="模拟输
 
 
 # Analysis Endpoints
-@router.get("/burst_analysis/", summary="爆管分析（高级）", description="高级版本的爆管分析，支持在指定时间点修改泵控制模式和阀门开度，以分析这些改变对爆管影响的作用。支持固定泵和变速泵的独立控制。")
+@router.get("/burst-analysis", summary="爆管分析（高级）", description="高级版本的爆管分析，支持在指定时间点修改泵控制模式和阀门开度，以分析这些改变对爆管影响的作用。支持固定泵和变速泵的独立控制。")
+@router.get("/burst_analysis/", summary="爆管分析（高级，旧路径）", description="高级版本的爆管分析，支持在指定时间点修改泵控制模式和阀门开度，以分析这些改变对爆管影响的作用。支持固定泵和变速泵的独立控制。", deprecated=True)
 async def fastapi_burst_analysis(
     network: str = Query(..., description="管网名称（或数据库名称）"),
     modify_pattern_start_time: str = Query(..., description="模式修改开始时间（ISO 8601格式）"),
@@ -249,7 +250,8 @@ async def fastapi_valve_close_analysis(
     return result or "success"
 
 
-@router.get("/valve_isolation_analysis/", summary="阀门隔离分析", description="分析当发生突发事件时，通过关闭指定阀门进行隔离，确定哪些阀门必须关闭、哪些可选关闭，以及隔离的可行性。")
+@router.get("/valve-isolation-analysis", summary="阀门隔离分析", description="分析当发生突发事件时，通过关闭指定阀门进行隔离，确定哪些阀门必须关闭、哪些可选关闭，以及隔离的可行性。")
+@router.get("/valve_isolation_analysis/", summary="阀门隔离分析（旧路径）", description="分析当发生突发事件时，通过关闭指定阀门进行隔离，确定哪些阀门必须关闭、哪些可选关闭，以及隔离的可行性。", deprecated=True)
 async def valve_isolation_endpoint(
     network: str = Query(..., description="管网名称（或数据库名称）"),
     accident_element: List[str] = Query(..., description="发生事故的管段/节点ID列表"),
@@ -289,7 +291,8 @@ async def valve_isolation_endpoint(
     return result
 
 
-@router.get("/flushing_analysis/", response_class=PlainTextResponse, summary="冲洗分析（高级）", description="高级版本的冲洗分析，支持同时开启多个阀门进行冲洗，指定排污节点，并设置固定的冲洗流量。返回纯文本格式的分析结果。")
+@router.get("/flushing-analysis", response_class=PlainTextResponse, summary="冲洗分析（高级）", description="高级版本的冲洗分析，支持同时开启多个阀门进行冲洗，指定排污节点，并设置固定的冲洗流量。返回纯文本格式的分析结果。")
+@router.get("/flushing_analysis/", response_class=PlainTextResponse, summary="冲洗分析（高级，旧路径）", description="高级版本的冲洗分析，支持同时开启多个阀门进行冲洗，指定排污节点，并设置固定的冲洗流量。返回纯文本格式的分析结果。", deprecated=True)
 async def fastapi_flushing_analysis(
     network: str = Query(..., description="管网名称（或数据库名称）"),
     start_time: str = Query(..., description="冲洗开始时间（ISO 8601格式）"),
@@ -329,7 +332,8 @@ async def fastapi_flushing_analysis(
     return result or "success"
 
 
-@router.get("/contaminant_simulation/", response_class=PlainTextResponse, summary="污染物模拟", description="对管网中的污染物扩散进行模拟，评估污染源对管网的影响范围和浓度分布。支持指定污染源位置、污染浓度和扩散模式。")
+@router.get("/contaminant-simulation", response_class=PlainTextResponse, summary="污染物模拟", description="对管网中的污染物扩散进行模拟，评估污染源对管网的影响范围和浓度分布。支持指定污染源位置、污染浓度和扩散模式。")
+@router.get("/contaminant_simulation/", response_class=PlainTextResponse, summary="污染物模拟（旧路径）", description="对管网中的污染物扩散进行模拟，评估污染源对管网的影响范围和浓度分布。支持指定污染源位置、污染浓度和扩散模式。", deprecated=True)
 async def fastapi_contaminant_simulation(
     network: str = Query(..., description="管网名称（或数据库名称）"),
     start_time: str = Query(..., description="污染开始时间（ISO 8601格式）"),
@@ -715,7 +719,8 @@ async def fastapi_pressure_sensor_placement_kmeans(
     )
 
 
-@router.post("/sensorplacementscheme/create", summary="传感器放置方案创建", description="创建新的传感器放置方案，支持灵敏度分析和KMeans聚类两种方法。根据指定的方法自动计算最优的传感器放置位置。")
+@router.post("/sensor-placement-schemes", summary="传感器放置方案创建", description="创建新的传感器放置方案，支持灵敏度分析和KMeans聚类两种方法。根据指定的方法自动计算最优的传感器放置位置。")
+@router.post("/sensorplacementscheme/create", summary="传感器放置方案创建（旧路径）", description="创建新的传感器放置方案，支持灵敏度分析和KMeans聚类两种方法。根据指定的方法自动计算最优的传感器放置位置。", deprecated=True)
 async def fastapi_pressure_sensor_placement(
     network: str = Query(..., description="管网名称（或数据库名称）"),
     scheme_name: str = Query(..., description="放置方案名称"),
@@ -763,7 +768,8 @@ async def fastapi_pressure_sensor_placement(
     return "success"
 
 
-@router.post("/runsimulationmanuallybydate/", summary="手动运行日期指定模拟", description="根据指定的开始时间和持续时间，手动运行水力模拟。开始时间必须是显式带时区的 ISO 8601 / RFC3339 时间。")
+@router.post("/simulations/run-by-date", summary="手动运行日期指定模拟", description="根据指定的开始时间和持续时间，手动运行水力模拟。开始时间必须是显式带时区的 ISO 8601 / RFC3339 时间。")
+@router.post("/runsimulationmanuallybydate/", summary="手动运行日期指定模拟（旧路径）", description="根据指定的开始时间和持续时间，手动运行水力模拟。开始时间必须是显式带时区的 ISO 8601 / RFC3339 时间。", deprecated=True)
 async def fastapi_run_simulation_manually_by_date(
     data: RunSimulationManuallyByDate = Body(..., description="模拟运行参数"),
 ) -> dict[str, str]: