diff --git a/specs/mvp/refactor/code_refactor.md b/specs/mvp/refactor/code_refactor.md
new file mode 100644
index 0000000..58ea4f6
--- /dev/null
+++ b/specs/mvp/refactor/code_refactor.md
@@ -0,0 +1,301 @@
+# MVP 代码结构重构方案（按功能模块划分）
+
+背景：当前 `src/mvp/` 下以 `v1.1/`、`v2.0/` 版本目录来组织代码。实际上 **v2.0 是在 v1.1 的 Ray Jobs SDK 提交链路基础上扩展了服务层**，并且为了让 v2.0 工作又对 v1.1 的 `docker-compose.yaml`、`dev.yaml` 做了修改（挂载 v2、开放 8080、增加 `v2:` 配置段）。因此“按版本分目录”会让依赖关系变得不清晰（谁是库、谁是应用、哪些配置是共享的）。
+
+本方案目标：把 `src/mvp/` 重构为“按功能模块”划分（ray 提交核心库 / service 服务层 / cli 工具 / TaskSpecs / configs / scripts），并给出迁移后的验证与执行方案。
+
+> 本文仅给出设计与迁移/验证方案，不直接改代码（待确认后再实施）。
+
+---
+
+## 1. 现状梳理（问题点）
+
+### 1.1 代码重复与耦合
+
+- `src/mvp/v2.0/py/mvp_v11/` 是从 `src/mvp/v1.1/py/mvp_v11/` 复制而来用于复用，但这导致：
+  - **库代码重复**（修 bug 要改两份）
+  - 谁是“权威实现”不明确
+- v2 API（`mvp_v2`）通过引用复制的 `mvp_v11.RayJobTool` 来提交 Ray Job，本质上依赖 v1.1 提交链路作为“库”。
+
+### 1.2 配置与部署目录不稳定
+
+- v2.0 复用了 v1.1 config 文件并新增 `v2:` section，这是合理的“向后兼容扩展”，但它把：
+  - “Ray submit 基础配置”
+  - “API 服务配置”
+  - “部署路径约定（/workspace/mvp/v1.1 vs /workspace/mvp/v2）”
+  混在一个文件里，不利于长期维护。
+
+### 1.3 命名歧义：jobspec 与 Ray job
+
+- v1.1/v2.0 都使用 `jobspec.yaml` 指代“训练语义参数”（PPO/GRPO/SFT 的训练字段）。
+- 但 Ray 也有 “Ray Job” 概念（submission_id、entrypoint、runtime_env 等），易造成沟通误解。
+- 需要把训练侧 specs 改名为 **TaskSpecs**（代表平台级任务规范），与 Ray Job 区分。
+
+---
+
+## 2. 重构目标（What good looks like）
+
+### 2.1 目录与职责清晰
+
+- “提交 Ray Job 的 SDK 封装”是一个可复用模块（库）。
+- “服务层（API + scheduler + SQLite）”是一个独立模块（应用/服务）。
+- “训练语义参数（TaskSpecs）”与 “Ray Job 提交参数（RayConfig）”分层清楚。
+
+### 2.2 单一真源（Single Source of Truth）
+
+- 只能有一份“Ray submitter core”实现（不能复制一份到另一个版本目录）。
+- API 与 CLI/脚本都复用同一份 core。
+
+### 2.3 兼容现有运行方式（渐进迁移）
+
+- 保留现有的脚本式启动/准备流程（Ray 起集群、准备模型/数据仍用 scripts）。
+- 允许在迁移期提供薄 wrapper 兼容旧路径（减少一次性 break）。
+
+---
+
+## 3. 目标结构（按功能模块划分）
+
+建议把 `src/mvp/` 重构为下面的“功能分层”：
+
+```
+src/mvp/
+  py/
+    argus/                    # 顶层包（避免与 Ray 的 `ray` 包冲突）
+      __init__.py
+
+      core/                   # 通用：yaml/模型定义/工具函数（纯库）
+        __init__.py
+        yaml_io.py
+        ids.py                # task_id / attempt_id 生成规则
+
+      ray/                    # Ray Job 提交“核心库”（由现成 mvp_v11 迁移而来）
+        __init__.py
+        models.py             # RayConfig, TaskSpec(解析), Attempt, enums
+        builders.py           # build_training_argv (ppo/grpo/sft)
+        driver_entrypoint.py  # 仍然作为 Ray job entrypoint（worker 上执行）
+        ray_job_tool.py       # Ray Jobs SDK 封装（submit/status/stop/logs）
+        runtime_env.py        # 统一 PYTHONPATH/runtime_env 组装逻辑
+
+      service/                # 服务层：FastAPI + scheduler + sqlite（应用）
+        __init__.py
+        app.py
+        scheduler.py
+        db.py
+        config.py             # service 相关配置读取（从 configs 读取）
+        ray_resources.py
+
+      cli/                    # 命令行/SDK 提交入口（由现成 v1.1 run.py 迁移而来）
+        __init__.py
+        run.py                # submit/status/logs/stop 等 action
+
+    server.py                 # uvicorn 入口（导入 argus.service.*）
+
+  configs/
+    dev.yaml                  # RayConfig + ServiceConfig（按层次组织、可扩展）
+    prod.yaml                 # （可选）生产配置模板
+
+  taskspecs/                  # 原 jobspecs/，改名 TaskSpecs（训练语义规范）
+    ppo.yaml
+    grpo.yaml
+    sft.yaml
+    README.md                 # TaskSpec 字段解释、示例
+
+  scripts/                    # 宿主机脚本（docker exec/compose 编排）
+    lib.sh
+    00_prereq_check.sh
+    01_up.sh / 02_down.sh
+    20_start_head.sh / 21_start_workers.sh
+    30_prepare_data_and_model.sh
+    40_submit_cli.sh          # 通过 cli/run.py 提交 TaskSpec
+    60_start_api.sh           # 启动 API（service）
+    61_stop_api.sh
+    62_status_api.sh
+
+  docker-compose.yaml         # dev 环境 compose（从 v1.1 迁移到这里，路径稳定）
+  README.md                   # 总入口文档（运行方式、目录约定）
+```
+
+### 3.1 关键点：库 vs 应用边界
+
+- `argus.ray` 是唯一的 Ray submitter 库（替代当前 v1.1/v2.0 的 `mvp_v11` 双份拷贝）。
+- `argus.service` 依赖 `argus.ray`，不反向依赖。
+- `argus.cli` 依赖 `argus.ray`，用于脚本化提交/调试。
+
+### 3.2 TaskSpecs vs RayConfig
+
+- `taskspecs/*.yaml`：描述训练任务语义参数（workload、nnodes、n_gpus_per_node、数据/模型路径、训练步数等）。
+- `configs/*.yaml`：描述 Ray 提交环境（address、entrypoint_resources、runtime_env 以及 service 配置）。
+
+---
+
+## 4. 配置策略（重构后如何组织 configs）
+
+### 4.1 建议的 config 分层
+
+把当前 `dev.yaml` 的内容明确分为两段（按模块名分段）：
+
+1) `ray:`（RayConfig）
+- job server address
+- shared_root（`/private`）
+- entrypoint resources（强制 driver 落 worker）
+- runtime_env env_vars（HF cache、PYTHONPATH 注入策略）
+
+2) `service:`（ServiceConfig）
+- api host/port
+- auth token_env
+- sqlite db_path
+- scheduler tick/max_running/retry_interval
+
+示例（结构示意）：
+
+```yaml
+ray:
+  address: "http://127.0.0.1:8265"
+  shared_root: "/private"
+  entrypoint_num_cpus: 1
+  entrypoint_resources:
+    worker_node: 1
+  runtime_env:
+    env_vars:
+      HF_ENDPOINT: "https://hf-mirror.com"
+      PYTHONUNBUFFERED: "1"
+  user_code_path: "/private/user/code"
+
+service:
+  api:
+    host: "0.0.0.0"
+    port: 8080
+  auth:
+    token_env: "MVP_INTERNAL_TOKEN"
+  sqlite:
+    db_path: "/private/common/db/mvp.sqlite3"
+  scheduler:
+    tick_s: 5
+    retry_interval_s: 60
+    max_running_tasks: 1
+```
+
+> 迁移期可以支持“旧格式”（v1.1 顶层字段 + v2: 段）与“新格式”（ray:/service: 两段）并存：解析时兼容读取，降低一次性改动风险；但最终以新格式为准。
+
+---
+
+## 5. 迁移路径（推荐分两阶段实施）
+
+### 阶段 A：先拷贝/迁移现成文件，再做最小调整（保持行为不变）
+
+目标：不改功能、不改 API 行为。优先通过“拷贝/迁移现成文件 + 修正包引用/路径”完成重构，避免重头重写逻辑（降低出错概率）。
+
+建议步骤：
+
+1) 抽出 `src/mvp/py/argus/ray/`（由现成代码迁移）
+   - 将 `src/mvp/v1.1/py/mvp_v11/` 迁移到 `src/mvp/py/argus/ray/`，并把它作为 submitter core 的唯一真源（不再保留一份复制品在其它目录）。
+   - 只做机械化调整：修正 import、修正默认路径常量（例如 tool code path / working dir）、修正 scripts 的调用路径。
+
+2) 抽出 `src/mvp/py/argus/service/`（由现成代码迁移）
+   - 将 `src/mvp/v2.0/py/mvp_v2/` 迁移到 `src/mvp/py/argus/service/`。
+   - service 侧对 submitter 的依赖统一改为 `src/mvp/py/argus/ray/`（不再引用 `src/mvp/v2.0/py/mvp_v11/` 的复制品）。
+
+3) CLI 统一入口：`src/mvp/py/argus/cli/run.py`（由现成代码迁移）
+   - 将 `src/mvp/v1.1/py/run.py` 迁移到 `src/mvp/py/argus/cli/run.py`，保留 action 语义（submit/status/logs/stop）。
+   - 仅调整 import 与默认路径，使其指向新目录（configs/taskspecs/py）。
+
+4) scripts 合并（以 v1.1 为基、合入 v2 API）
+   - 将 `src/mvp/v1.1/scripts/` 迁移到 `src/mvp/scripts/`（Ray 集群编排最成熟）。
+   - 将 `src/mvp/v2.0/scripts/` 的 API 启停脚本合入 `src/mvp/scripts/`，并统一命名与默认路径。
+
+5) docker-compose / mounts 稳定化（你已确认要迁移）
+   - 将 `src/mvp/v1.1/docker-compose.yaml` 迁移为 `src/mvp/docker-compose.yaml`。
+   - 容器内挂载统一：宿主机 `.../src/mvp/` → 容器 `/workspace/mvp/`（包含 `py/ configs/ taskspecs/ scripts/`）。
+   - runtime_env 的 `PYTHONPATH` 注入统一指向 `/workspace/mvp/py`（不再出现 `/workspace/mvp/v1.1/py`、`/workspace/mvp/v2/...`）。
+
+阶段 A 完成标准：
+- 原来 v1.1 的 CLI 提交方式仍可用（提交 PPO/GRPO/SFT）。
+- v2 API 仍可用（队列、取消、日志）。
+- 不再存在 `mvp_v11` 的重复目录。
+
+### 阶段 B：配置格式升级（按模块两段）+ TaskSpecs 更名落地
+
+目标：把 jobspec 真正改名为 TaskSpec，并把 config 升级为按模块两段（`ray:`/`service:`）清晰分层。
+
+建议步骤：
+- `jobspecs/` → `taskspecs/`，并更新 README/脚本引用。
+- `dev.yaml` 从“顶层字段 + v2:”迁移为“ray:/service:”两段。
+- 保留一段时间的兼容解析逻辑（读取旧格式时发出 warning）。
+- 完成验证后删除旧版本目录：`src/mvp/v1.1/`、`src/mvp/v2.0/`（以及远端对应目录），确保新结构成为唯一入口。
+
+阶段 B 完成标准：
+- docs 里不再出现 “jobspec” 词汇，统一称 “TaskSpec”。
+- `configs/dev.yaml` 分层清晰（`ray:`/`service:` 两段按模块名），服务与 Ray 的配置互不干扰。
+
+---
+
+## 6. 重构后的验证与执行方案（验收/回归）
+
+### 6.1 本地（仓库内）静态验证
+
+1) import / 入口检查（在容器环境）
+- `python3 -c "from argus.ray.ray_job_tool import RayJobTool"`
+- `python3 -c "from argus.service.app import create_app"`
+
+2) 目录结构检查
+- 确保 `src/mvp/py` 是唯一 python 代码根
+- 确保 `taskspecs/`、`configs/`、`scripts/` 都在 `src/mvp/` 下
+
+### 6.2 dev 环境（argus@h1）端到端验证
+
+前置：
+- 远端目录：`argus@h1:/home2/argus/infra/mvp/`（维持不变）
+- 共享目录：`/home2/argus/infra/mvp/shared` 挂载到容器 `/private`
+
+验证步骤（推荐顺序）：
+
+1) 重新拉起容器 + 启动 Ray
+- `scripts/01_up.sh`
+- `scripts/20_start_head.sh`（head `--num-cpus=0 --num-gpus=0`）
+- `scripts/21_start_workers.sh`（workers 带 `worker_node` 资源）
+- `ray status` / `ray list nodes` 确认 head 无 GPU、workers 各 4 GPU
+
+2) CLI 提交回归（等价 v1.1）
+- 提交 `taskspecs/sft.yaml`，确认成功
+- 提交 `taskspecs/grpo.yaml`，确认成功
+- 提交 `taskspecs/ppo.yaml`，确认成功
+
+3) API 服务回归（等价 v2.0）
+- `scripts/60_start_api.sh`
+- `POST /api/v2/tasks`（raw YAML TaskSpec）
+- `GET /api/v2/tasks/{task_id}`：确认返回 `created_at/updated_at`
+- `POST /api/v2/tasks/{task_id}:cancel`：确认任务 `state=CANCELED` 且 attempt `ray_status=STOPPED`（服务侧语义一致）
+
+4) 队列行为回归
+- 在 `service.scheduler.max_running_tasks=1` 下：
+  - 连续提交两个 8-GPU 任务：第二个应保持 `QUEUED/PENDING_RESOURCES`，直到第一个结束后自动提交。
+
+验收标准：
+- 三种 workload（PPO/GRPO/SFT）都能通过 CLI 跑通（或至少能正确提交到 Ray 并进入 RUNNING）。
+- API 提交/查询/取消/日志正常。
+- “cancel 后 state=CANCELED 但 attempt 仍 RUNNING”的不一致问题不再出现。
+
+---
+
+## 7. 风险与注意事项
+
+1) PYTHONPATH 注入路径变化
+- 当前 runtime_env 里有 `MVP_TOOL_CODE_PATH=/workspace/mvp/v1.1/py` 的历史路径假设；
+- 重构后需统一为 `/workspace/mvp/py`，并确保所有容器都挂载到相同路径。
+
+2) SQLite WAL 在 NFS 上的稳定性
+- 目前 db 使用 WAL（生成 `-wal/-shm`），NFS 下可能有一致性风险；
+- 可作为后续优化：检测 NFS 时退回 `journal_mode=DELETE` 或换成单机本地盘。
+
+3) 渐进迁移的兼容期
+- 迁移期可以短暂保留旧路径（例如 `src/mvp/v1.1`、`src/mvp/v2.0` 仅保留 README 指向新路径）以减少一次性断裂；但你已确认最终会删除这两个目录，因此需要在 scripts/文档同步更新后尽快清理。
+
+---
+
+## 8. 已确认约束（将按此实施）
+
+你已明确：
+
+1) `docker-compose.yaml` 必须迁移到 `src/mvp/` 根；重构完成后 `src/mvp/v1.1`、`src/mvp/v2.0` 都会删除。
+2) `configs/dev.yaml` 升级为两段，按模块名分段：`ray:` 与 `service:`；并保持纯 YAML 风格（不混用 JSON inline map）。
+3) TaskSpec 字段先保持与现有 v1.1 YAML 完全一致（仅目录与命名变化），避免引入不必要的不兼容。
diff --git a/src/mvp/README.md b/src/mvp/README.md
new file mode 100644
index 0000000..d7db5f7
--- /dev/null
+++ b/src/mvp/README.md
@@ -0,0 +1,17 @@
+# MVP（模块化结构）
+
+本目录是 MVP 的“按功能模块”组织后的最终入口（替代原 `v1.1/`、`v2.0/` 版本目录）。
+
+目录：
+- `py/`：Python 代码（`argus.*` 包）
+  - `argus.ray`：Ray Jobs SDK submitter core（提交/查询/停止/日志）
+  - `argus.service`：API + scheduler + SQLite（服务层队列/重试/状态聚合）
+  - `argus.cli`：CLI 工具（用于脚本化提交/调试）
+- `configs/`：配置（`ray:` 与 `service:` 两段，纯 YAML 风格）
+- `taskspecs/`：TaskSpec（训练任务语义参数）
+- `scripts/`：宿主机脚本（docker compose/exec 编排）
+- `docker-compose.yaml`：dev 环境容器定义（head+workers）
+
+快速开始：
+- CLI 提交流程：`scripts/run_all_cli.sh`
+- API 提交流程：`scripts/run_all_api.sh`
diff --git a/src/mvp/configs/dev.yaml b/src/mvp/configs/dev.yaml
new file mode 100644
index 0000000..d117f65
--- /dev/null
+++ b/src/mvp/configs/dev.yaml
@@ -0,0 +1,34 @@
+ray:
+  # Ray Job server address (head 容器内视角)
+  address: "http://127.0.0.1:8265"
+
+  # 共享根路径（容器内统一 /private，对齐生产）
+  shared_root: "/private"
+
+  # 强制 driver 落 worker（head 不跑训练）
+  entrypoint_num_cpus: 1
+  entrypoint_resources:
+    worker_node: 1
+
+  # 所有 job 通用 runtime env
+  runtime_env:
+    env_vars:
+      HF_ENDPOINT: "https://hf-mirror.com"
+      PYTHONUNBUFFERED: "1"
+
+  # 用户自定义代码目录（可被 PYTHONPATH 注入）
+  user_code_path: "/private/user/code"
+
+service:
+  api:
+    host: "0.0.0.0"
+    port: 8080
+  auth:
+    token_env: "MVP_INTERNAL_TOKEN"
+  sqlite:
+    db_path: "/private/common/db/mvp.sqlite3"
+  scheduler:
+    tick_s: 5
+    retry_interval_s: 60
+    max_running_tasks: 1
+
diff --git a/src/mvp/v1.1/docker-compose.yaml b/src/mvp/docker-compose.yaml
similarity index 71%
rename from src/mvp/v1.1/docker-compose.yaml
rename to src/mvp/docker-compose.yaml
index 43892df..7759941 100644
--- a/src/mvp/v1.1/docker-compose.yaml
+++ b/src/mvp/docker-compose.yaml
@@ -3,16 +3,18 @@ version: "3.8"
 services:
   ray_head:
     image: verlai/verl:sgl055.latest
-    container_name: mvp11-ray-head
+    container_name: argus-ray-head
     command: sleep infinity
     ports:
       - "8265:8265"
       - "8080:8080"
     volumes:
-      - ../verl:/workspace/verl
-      - ../shared:/private
-      - .:/workspace/mvp/v1.1
-      - ../v2:/workspace/mvp/v2
+      # NOTE: this compose file is intended for the dev env layout like:
+      #   /home2/argus/infra/mvp/{shared,verl,src/mvp}
+      # so from `src/mvp/` the shared/verl dirs are `../../shared` and `../../verl`.
+      - ../../verl:/workspace/verl
+      - ../../shared:/private
+      - .:/workspace/mvp
     shm_size: "10g"
     ulimits:
       nofile:
@@ -22,7 +24,7 @@ services:
       - SYS_ADMIN
       - SYS_PTRACE
     networks:
-      - mvp11-ray-net
+      - argus-ray-net
     environment:
       HF_HOME: "/private/hf"
       HUGGINGFACE_HUB_CACHE: "/private/hf/hub"
@@ -32,12 +34,12 @@ services:
 
   ray_worker_0:
     image: verlai/verl:sgl055.latest
-    container_name: mvp11-ray-worker-0
+    container_name: argus-ray-worker-0
     command: sleep infinity
     volumes:
-      - ../verl:/workspace/verl
-      - ../shared:/private
-      - .:/workspace/mvp/v1.1
+      - ../../verl:/workspace/verl
+      - ../../shared:/private
+      - .:/workspace/mvp
     shm_size: "10g"
     ulimits:
       nofile:
@@ -47,7 +49,7 @@ services:
       - SYS_ADMIN
       - SYS_PTRACE
     networks:
-      - mvp11-ray-net
+      - argus-ray-net
     runtime: nvidia
     environment:
       NVIDIA_VISIBLE_DEVICES: "0,1,2,3"
@@ -60,12 +62,12 @@ services:
 
   ray_worker_1:
     image: verlai/verl:sgl055.latest
-    container_name: mvp11-ray-worker-1
+    container_name: argus-ray-worker-1
     command: sleep infinity
     volumes:
-      - ../verl:/workspace/verl
-      - ../shared:/private
-      - .:/workspace/mvp/v1.1
+      - ../../verl:/workspace/verl
+      - ../../shared:/private
+      - .:/workspace/mvp
     shm_size: "10g"
     ulimits:
       nofile:
@@ -75,7 +77,7 @@ services:
       - SYS_ADMIN
       - SYS_PTRACE
     networks:
-      - mvp11-ray-net
+      - argus-ray-net
     runtime: nvidia
     environment:
       NVIDIA_VISIBLE_DEVICES: "4,5,6,7"
@@ -87,5 +89,5 @@ services:
       PYTHONUNBUFFERED: "1"
 
 networks:
-  mvp11-ray-net:
+  argus-ray-net:
     driver: bridge
diff --git a/src/mvp/v2.0/py/mvp_v2/__init__.py b/src/mvp/py/argus/__init__.py
similarity index 100%
rename from src/mvp/v2.0/py/mvp_v2/__init__.py
rename to src/mvp/py/argus/__init__.py
diff --git a/src/mvp/py/argus/cli/__init__.py b/src/mvp/py/argus/cli/__init__.py
new file mode 100644
index 0000000..fe16459
--- /dev/null
+++ b/src/mvp/py/argus/cli/__init__.py
@@ -0,0 +1,2 @@
+__all__ = []
+
diff --git a/src/mvp/v1.1/py/run.py b/src/mvp/py/argus/cli/run.py
similarity index 66%
rename from src/mvp/v1.1/py/run.py
rename to src/mvp/py/argus/cli/run.py
index 67fe975..9cb52a1 100644
--- a/src/mvp/v1.1/py/run.py
+++ b/src/mvp/py/argus/cli/run.py
@@ -8,22 +8,25 @@ import sys
 
 
 def _ensure_import_path() -> None:
-    # Allow `python3 /workspace/.../py/run.py` to import `mvp_v11.*`
+    # Allow running as a file path (not just `python3 -m argus.cli.run`).
+    # Ensure `/workspace/mvp/py` is on sys.path so `import argus.*` works.
     here = os.path.dirname(os.path.abspath(__file__))
-    if here not in sys.path:
-        sys.path.insert(0, here)
+    py_root = os.path.dirname(os.path.dirname(here))  # .../py
+    if py_root not in sys.path:
+        sys.path.insert(0, py_root)
 
 
 def main() -> int:
     _ensure_import_path()
 
-    from mvp_v11.models import JobSpec, RayConfig
-    from mvp_v11.ray_job_tool import RayJobTool
-    from mvp_v11.yaml_io import load_yaml
+    from argus.ray.models import JobSpec, RayConfig
+    from argus.ray.ray_job_tool import RayJobTool
+    from argus.ray.yaml_io import load_yaml
 
     parser = argparse.ArgumentParser()
-    parser.add_argument("--config", required=True, help="Ray base config yaml")
-    parser.add_argument("--jobspec", help="Training jobspec yaml (required for submit)")
+    parser.add_argument("--config", required=True, help="MVP config yaml (ray/service)")
+    parser.add_argument("--taskspec", help="Training TaskSpec yaml (required for submit)")
+    parser.add_argument("--jobspec", dest="taskspec", help=argparse.SUPPRESS)  # backward compatible alias
     parser.add_argument("--action", required=True, choices=["submit", "status", "stop", "logs", "list"])
     parser.add_argument("--submission-id", help="For status/stop/logs")
     parser.add_argument("--no-wait", action="store_true", help="Submit and return immediately")
@@ -34,9 +37,9 @@ def main() -> int:
     tool = RayJobTool(cfg)
 
     if args.action == "submit":
-        if not args.jobspec:
-            raise SystemExit("--jobspec is required for submit")
-        spec = JobSpec.from_dict(load_yaml(args.jobspec))
+        if not args.taskspec:
+            raise SystemExit("--taskspec is required for submit")
+        spec = JobSpec.from_dict(load_yaml(args.taskspec))
         submitted = tool.submit(spec, no_wait=args.no_wait)
         print(submitted)
         return 0
diff --git a/src/mvp/py/argus/core/__init__.py b/src/mvp/py/argus/core/__init__.py
new file mode 100644
index 0000000..fe16459
--- /dev/null
+++ b/src/mvp/py/argus/core/__init__.py
@@ -0,0 +1,2 @@
+__all__ = []
+
diff --git a/src/mvp/v2.0/py/mvp_v2/ids.py b/src/mvp/py/argus/core/ids.py
similarity index 100%
rename from src/mvp/v2.0/py/mvp_v2/ids.py
rename to src/mvp/py/argus/core/ids.py
diff --git a/src/mvp/v1.1/py/mvp_v11/__init__.py b/src/mvp/py/argus/ray/__init__.py
similarity index 100%
rename from src/mvp/v1.1/py/mvp_v11/__init__.py
rename to src/mvp/py/argus/ray/__init__.py
diff --git a/src/mvp/v1.1/py/mvp_v11/builders.py b/src/mvp/py/argus/ray/builders.py
similarity index 100%
rename from src/mvp/v1.1/py/mvp_v11/builders.py
rename to src/mvp/py/argus/ray/builders.py
diff --git a/src/mvp/v1.1/py/mvp_v11/driver_entrypoint.py b/src/mvp/py/argus/ray/driver_entrypoint.py
similarity index 100%
rename from src/mvp/v1.1/py/mvp_v11/driver_entrypoint.py
rename to src/mvp/py/argus/ray/driver_entrypoint.py
diff --git a/src/mvp/v2.0/py/mvp_v11/models.py b/src/mvp/py/argus/ray/models.py
similarity index 96%
rename from src/mvp/v2.0/py/mvp_v11/models.py
rename to src/mvp/py/argus/ray/models.py
index 41f8804..66bd823 100644
--- a/src/mvp/v2.0/py/mvp_v11/models.py
+++ b/src/mvp/py/argus/ray/models.py
@@ -21,6 +21,11 @@ class RayConfig:
 
     @staticmethod
     def from_dict(d: dict[str, Any]) -> "RayConfig":
+        # New format: root.ray
+        # Backward compatible: root (flat)
+        if isinstance(d.get("ray"), dict):
+            d = d["ray"]  # type: ignore[assignment]
+
         runtime_env = d.get("runtime_env") or {}
         env_vars = (runtime_env.get("env_vars") or {}) if isinstance(runtime_env, dict) else {}
         if not isinstance(env_vars, dict):
diff --git a/src/mvp/v1.1/py/mvp_v11/ray_job_tool.py b/src/mvp/py/argus/ray/ray_job_tool.py
similarity index 98%
rename from src/mvp/v1.1/py/mvp_v11/ray_job_tool.py
rename to src/mvp/py/argus/ray/ray_job_tool.py
index 01b899a..8d7c538 100644
--- a/src/mvp/v1.1/py/mvp_v11/ray_job_tool.py
+++ b/src/mvp/py/argus/ray/ray_job_tool.py
@@ -53,9 +53,9 @@ class RayJobTool:
         env_vars.setdefault("TRANSFORMERS_CACHE", f"{self.cfg.shared_root}/hf/transformers")
         env_vars.setdefault("PYTHONUNBUFFERED", "1")
 
-        # Tool code path must be importable on workers (compose mounts v1.1 into all containers).
+        # Tool code path must be importable on workers (compose mounts `/workspace/mvp` into all containers).
         # Place it before verl code to avoid interfering with verl import priority.
-        tool_code_path = os.environ.get("MVP_TOOL_CODE_PATH", "/workspace/mvp/v1.1/py")
+        tool_code_path = os.environ.get("MVP_TOOL_CODE_PATH", "/workspace/mvp/py")
 
         user_code_path = self.cfg.user_code_path
         code_path = spec.code_path
@@ -81,7 +81,7 @@ class RayJobTool:
         entrypoint_argv = [
             "python3",
             "-m",
-            "mvp_v11.driver_entrypoint",
+            "argus.ray.driver_entrypoint",
             "--job-dir",
             job_dir,
             *built.argv,
diff --git a/src/mvp/v1.1/py/mvp_v11/yaml_io.py b/src/mvp/py/argus/ray/yaml_io.py
similarity index 100%
rename from src/mvp/v1.1/py/mvp_v11/yaml_io.py
rename to src/mvp/py/argus/ray/yaml_io.py
diff --git a/src/mvp/py/argus/service/__init__.py b/src/mvp/py/argus/service/__init__.py
new file mode 100644
index 0000000..fe16459
--- /dev/null
+++ b/src/mvp/py/argus/service/__init__.py
@@ -0,0 +1,2 @@
+__all__ = []
+
diff --git a/src/mvp/v2.0/py/mvp_v2/app.py b/src/mvp/py/argus/service/app.py
similarity index 98%
rename from src/mvp/v2.0/py/mvp_v2/app.py
rename to src/mvp/py/argus/service/app.py
index 798a124..6df707a 100644
--- a/src/mvp/v2.0/py/mvp_v2/app.py
+++ b/src/mvp/py/argus/service/app.py
@@ -7,11 +7,11 @@ from typing import Any
 import yaml
 from fastapi import FastAPI, HTTPException, Request, Response
 
-from mvp_v11.models import JobSpec, RayConfig
+from argus.core.ids import new_task_id
+from argus.ray.models import JobSpec, RayConfig
 
 from .config import V2Config
 from .db import Db
-from .ids import new_task_id
 from .scheduler import Scheduler
 
 
diff --git a/src/mvp/v2.0/py/mvp_v2/config.py b/src/mvp/py/argus/service/config.py
similarity index 63%
rename from src/mvp/v2.0/py/mvp_v2/config.py
rename to src/mvp/py/argus/service/config.py
index c859c9b..7d3f5dd 100644
--- a/src/mvp/v2.0/py/mvp_v2/config.py
+++ b/src/mvp/py/argus/service/config.py
@@ -36,20 +36,29 @@ class V2Config:
 
     @staticmethod
     def from_root_dict(root: dict[str, Any]) -> "V2Config":
-        v2 = root.get("v2") or {}
-        if not isinstance(v2, dict):
-            raise ValueError("config.v2 must be a mapping")
+        # New format: root.service
+        # Backward compatible: root.v2
+        service = root.get("service")
+        if service is None:
+            service = root.get("v2") or {}
+        if not isinstance(service, dict):
+            raise ValueError("config.service must be a mapping")
 
-        api = v2.get("api") or {}
-        auth = v2.get("auth") or {}
-        sqlite = v2.get("sqlite") or {}
-        scheduler = v2.get("scheduler") or {}
+        api = service.get("api") or {}
+        auth = service.get("auth") or {}
+        sqlite = service.get("sqlite") or {}
+        scheduler = service.get("scheduler") or {}
 
         if not isinstance(api, dict) or not isinstance(auth, dict) or not isinstance(sqlite, dict) or not isinstance(scheduler, dict):
-            raise ValueError("config.v2.{api,auth,sqlite,scheduler} must be mappings")
+            raise ValueError("config.service.{api,auth,sqlite,scheduler} must be mappings")
 
-        shared_root = str(root.get("shared_root") or "/private")
-        default_db_path = f"{shared_root}/common/db/mvp_v2.sqlite3"
+        ray = root.get("ray")
+        if isinstance(ray, dict) and ray.get("shared_root"):
+            shared_root = str(ray.get("shared_root"))
+        else:
+            shared_root = str(root.get("shared_root") or "/private")
+
+        default_db_path = f"{shared_root}/common/db/mvp.sqlite3"
         db_path = str(sqlite.get("db_path") or default_db_path)
 
         return V2Config(
@@ -65,4 +74,3 @@ class V2Config:
                 max_running_tasks=int(scheduler.get("max_running_tasks") or 1),
             ),
         )
-
diff --git a/src/mvp/v2.0/py/mvp_v2/db.py b/src/mvp/py/argus/service/db.py
similarity index 100%
rename from src/mvp/v2.0/py/mvp_v2/db.py
rename to src/mvp/py/argus/service/db.py
diff --git a/src/mvp/v2.0/py/mvp_v2/ray_resources.py b/src/mvp/py/argus/service/ray_resources.py
similarity index 100%
rename from src/mvp/v2.0/py/mvp_v2/ray_resources.py
rename to src/mvp/py/argus/service/ray_resources.py
diff --git a/src/mvp/v2.0/py/mvp_v2/scheduler.py b/src/mvp/py/argus/service/scheduler.py
similarity index 97%
rename from src/mvp/v2.0/py/mvp_v2/scheduler.py
rename to src/mvp/py/argus/service/scheduler.py
index d84f9f2..452b77c 100644
--- a/src/mvp/v2.0/py/mvp_v2/scheduler.py
+++ b/src/mvp/py/argus/service/scheduler.py
@@ -8,12 +8,12 @@ from typing import Any
 
 import yaml
 
-from mvp_v11.models import JobSpec, RayConfig
-from mvp_v11.ray_job_tool import RayJobTool
+from argus.core.ids import attempt_submission_id
+from argus.ray.models import JobSpec, RayConfig
+from argus.ray.ray_job_tool import RayJobTool
 
 from .config import V2Config
 from .db import Db
-from .ids import attempt_submission_id
 from .ray_resources import ensure_ray_connected, get_cluster_available
 
 
diff --git a/src/mvp/v2.0/py/requirements.txt b/src/mvp/py/requirements.txt
similarity index 100%
rename from src/mvp/v2.0/py/requirements.txt
rename to src/mvp/py/requirements.txt
diff --git a/src/mvp/v2.0/py/server.py b/src/mvp/py/server.py
similarity index 86%
rename from src/mvp/v2.0/py/server.py
rename to src/mvp/py/server.py
index b1ea2ef..31482f6 100644
--- a/src/mvp/v2.0/py/server.py
+++ b/src/mvp/py/server.py
@@ -5,13 +5,13 @@ import argparse
 
 import uvicorn
 
-from mvp_v2.app import create_app
-from mvp_v2.config import V2Config
+from argus.service.app import create_app
+from argus.service.config import V2Config
 
 
 def main() -> int:
     parser = argparse.ArgumentParser()
-    parser.add_argument("--config", required=True, help="Path to v1.1 RayConfig YAML (extended with v2:)")
+    parser.add_argument("--config", required=True, help="Path to MVP config YAML (ray:/service:)")
     args = parser.parse_args()
 
     # Load app and read v2.api host/port from config.
@@ -30,4 +30,3 @@ def main() -> int:
 
 if __name__ == "__main__":
     raise SystemExit(main())
-
diff --git a/src/mvp/v1.1/scripts/00_prereq_check.sh b/src/mvp/scripts/00_prereq_check.sh
old mode 100644
new mode 100755
similarity index 56%
rename from src/mvp/v1.1/scripts/00_prereq_check.sh
rename to src/mvp/scripts/00_prereq_check.sh
index e6479f8..c6335df
--- a/src/mvp/v1.1/scripts/00_prereq_check.sh
+++ b/src/mvp/scripts/00_prereq_check.sh
@@ -27,16 +27,15 @@ else
   nvidia-smi -L || true
 fi
 
-echo "[host] ensure shared dirs exist under ../shared"
-mkdir -p "${ROOT_DIR}/../shared"/{datasets,hf,jobs,outputs,ray,common,user}
-mkdir -p "${ROOT_DIR}/../shared/common"/{code,datasets,models}
-mkdir -p "${ROOT_DIR}/../shared/user"/{code}
+echo "[host] ensure shared dirs exist under ../../shared"
+mkdir -p "${ROOT_DIR}/../../shared"/{datasets,hf,jobs,outputs,ray,common,user}
+mkdir -p "${ROOT_DIR}/../../shared/common"/{code,datasets,models}
+mkdir -p "${ROOT_DIR}/../../shared/user"/{code}
 
-echo "[host] ensure verl repo exists under ../verl (required by prepare scripts)"
-if [[ ! -d "${ROOT_DIR}/../verl" ]]; then
-  echo "missing ../verl. On remote, ensure /home2/argus/infra/mvp/verl exists (git clone volcengine/verl)." >&2
+echo "[host] ensure verl repo exists under ../../verl (required by prepare scripts)"
+if [[ ! -d "${ROOT_DIR}/../../verl" ]]; then
+  echo "missing ../../verl. On remote, ensure /home2/argus/infra/mvp/verl exists (git clone volcengine/verl)." >&2
   exit 1
 fi
 
 echo "ok"
-
diff --git a/src/mvp/v1.1/scripts/01_up.sh b/src/mvp/scripts/01_up.sh
old mode 100644
new mode 100755
similarity index 80%
rename from src/mvp/v1.1/scripts/01_up.sh
rename to src/mvp/scripts/01_up.sh
index 5dffc6c..ab67090
--- a/src/mvp/v1.1/scripts/01_up.sh
+++ b/src/mvp/scripts/01_up.sh
@@ -9,8 +9,8 @@ if [[ "${SKIP_CLEANUP_V1:-0}" != "1" ]]; then
   "${SCRIPT_DIR}/03_cleanup_v1_legacy.sh" || true
 fi
 
-echo "[host] docker compose up -d (v1.1)"
+echo "[host] docker compose up -d (mvp)"
 dc up -d
 
 echo "[host] containers:"
-docker ps --format 'table {{.Names}}\t{{.Status}}\t{{.Ports}}' | (head -n 1 && grep -E "mvp11-ray-") || true
+docker ps --format 'table {{.Names}}\t{{.Status}}\t{{.Ports}}' | (head -n 1 && grep -E "argus-ray-") || true
diff --git a/src/mvp/v1.1/scripts/02_down.sh b/src/mvp/scripts/02_down.sh
old mode 100644
new mode 100755
similarity index 82%
rename from src/mvp/v1.1/scripts/02_down.sh
rename to src/mvp/scripts/02_down.sh
index a0d6eb0..9e950f9
--- a/src/mvp/v1.1/scripts/02_down.sh
+++ b/src/mvp/scripts/02_down.sh
@@ -5,8 +5,7 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 # shellcheck source=lib.sh
 source "${SCRIPT_DIR}/lib.sh"
 
-echo "[host] docker compose down (v1.1)"
+echo "[host] docker compose down (mvp)"
 dc down -v || true
 
 echo "[host] done"
-
diff --git a/src/mvp/v1.1/scripts/03_cleanup_v1_legacy.sh b/src/mvp/scripts/03_cleanup_v1_legacy.sh
old mode 100644
new mode 100755
similarity index 100%
rename from src/mvp/v1.1/scripts/03_cleanup_v1_legacy.sh
rename to src/mvp/scripts/03_cleanup_v1_legacy.sh
diff --git a/src/mvp/v1.1/scripts/05_ensure_verl_repo.sh b/src/mvp/scripts/05_ensure_verl_repo.sh
old mode 100644
new mode 100755
similarity index 94%
rename from src/mvp/v1.1/scripts/05_ensure_verl_repo.sh
rename to src/mvp/scripts/05_ensure_verl_repo.sh
index 3a6da0d..3d8d7a1
--- a/src/mvp/v1.1/scripts/05_ensure_verl_repo.sh
+++ b/src/mvp/scripts/05_ensure_verl_repo.sh
@@ -5,7 +5,7 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 # shellcheck source=lib.sh
 source "${SCRIPT_DIR}/lib.sh"
 
-VERL_DIR="${ROOT_DIR}/../verl"
+VERL_DIR="${ROOT_DIR}/../../verl"
 
 echo "[host] ensure verl repo exists at: ${VERL_DIR}"
 if [[ -d "${VERL_DIR}/.git" ]]; then
@@ -20,4 +20,3 @@ fi
 
 echo "cloning volcengine/verl -> ${VERL_DIR}"
 git clone https://github.com/volcengine/verl.git "${VERL_DIR}"
-
diff --git a/src/mvp/scripts/12_install_api_deps.sh b/src/mvp/scripts/12_install_api_deps.sh
new file mode 100755
index 0000000..565db17
--- /dev/null
+++ b/src/mvp/scripts/12_install_api_deps.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+# Install API/CLI dependencies inside the head container (best-effort).
+# Assumes containers are already up and `/workspace/mvp/` is mounted.
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=lib.sh
+source "${SCRIPT_DIR}/lib.sh"
+
+dexec "${HEAD_CONTAINER}" bash -lc "python3 -m pip install -U pip >/dev/null 2>&1 || true"
+dexec "${HEAD_CONTAINER}" bash -lc "python3 -m pip install -r /workspace/mvp/py/requirements.txt"
diff --git a/src/mvp/scripts/12_install_py_deps.sh b/src/mvp/scripts/12_install_py_deps.sh
new file mode 100755
index 0000000..4c1126f
--- /dev/null
+++ b/src/mvp/scripts/12_install_py_deps.sh
@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=lib.sh
+source "${SCRIPT_DIR}/lib.sh"
+
+echo "[head] install python deps for CLI/API"
+dexec "${HEAD_CONTAINER}" bash -lc "python3 -m pip install -r /workspace/mvp/py/requirements.txt"
diff --git a/src/mvp/v1.1/scripts/20_start_head.sh b/src/mvp/scripts/20_start_head.sh
old mode 100644
new mode 100755
similarity index 100%
rename from src/mvp/v1.1/scripts/20_start_head.sh
rename to src/mvp/scripts/20_start_head.sh
diff --git a/src/mvp/v1.1/scripts/21_start_workers.sh b/src/mvp/scripts/21_start_workers.sh
old mode 100644
new mode 100755
similarity index 100%
rename from src/mvp/v1.1/scripts/21_start_workers.sh
rename to src/mvp/scripts/21_start_workers.sh
diff --git a/src/mvp/v1.1/scripts/30_prepare_data_and_model.sh b/src/mvp/scripts/30_prepare_data_and_model.sh
old mode 100644
new mode 100755
similarity index 100%
rename from src/mvp/v1.1/scripts/30_prepare_data_and_model.sh
rename to src/mvp/scripts/30_prepare_data_and_model.sh
diff --git a/src/mvp/v1.1/scripts/31_snapshot_verl_code.sh b/src/mvp/scripts/31_snapshot_verl_code.sh
old mode 100644
new mode 100755
similarity index 100%
rename from src/mvp/v1.1/scripts/31_snapshot_verl_code.sh
rename to src/mvp/scripts/31_snapshot_verl_code.sh
diff --git a/src/mvp/scripts/44_submit_sdk.sh b/src/mvp/scripts/44_submit_sdk.sh
new file mode 100755
index 0000000..1df83e0
--- /dev/null
+++ b/src/mvp/scripts/44_submit_sdk.sh
@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=lib.sh
+source "${SCRIPT_DIR}/lib.sh"
+
+CONFIG_PATH="${1:-/workspace/mvp/configs/dev.yaml}"
+TASKSPEC_PATH="${2:-}"
+
+if [[ -z "${TASKSPEC_PATH}" ]]; then
+  echo "usage: $0 <config_yaml_in_container> <taskspec_yaml_in_container>" >&2
+  echo "example: $0 /workspace/mvp/configs/dev.yaml /workspace/mvp/taskspecs/ppo.yaml" >&2
+  exit 1
+fi
+
+echo "[head] submit via Ray Python SDK"
+dexec "${HEAD_CONTAINER}" bash -lc "cd /workspace/mvp/py && python3 -m argus.cli.run --config '${CONFIG_PATH}' --taskspec '${TASKSPEC_PATH}' --action submit --no-wait"
diff --git a/src/mvp/v1.1/scripts/50_status.sh b/src/mvp/scripts/50_status.sh
old mode 100644
new mode 100755
similarity index 100%
rename from src/mvp/v1.1/scripts/50_status.sh
rename to src/mvp/scripts/50_status.sh
diff --git a/src/mvp/scripts/60_start_api.sh b/src/mvp/scripts/60_start_api.sh
new file mode 100755
index 0000000..29cef85
--- /dev/null
+++ b/src/mvp/scripts/60_start_api.sh
@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=lib.sh
+source "${SCRIPT_DIR}/lib.sh"
+
+CONFIG_IN_CONTAINER="${CONFIG_IN_CONTAINER:-/workspace/mvp/configs/dev.yaml}"
+LOG_PATH="${LOG_PATH:-/private/common/logs/argus_mvp_api.log}"
+PID_PATH="${PID_PATH:-/private/common/run/argus_mvp_api.pid}"
+
+echo "[host] starting mvp v2 api in head container: ${HEAD_CONTAINER}"
+
+dexec "${HEAD_CONTAINER}" bash -lc "mkdir -p \"$(dirname "${LOG_PATH}")\" \"$(dirname "${PID_PATH}")\""
+
+# Note: requires /workspace/mvp/py to be present in the container (mounted).
+# Escape $ so that the command substitution happens in the container, not on the host.
+dexec "${HEAD_CONTAINER}" bash -lc "if test -f '${PID_PATH}'; then pid=\$(cat '${PID_PATH}'); if kill -0 \"\${pid}\" >/dev/null 2>&1; then echo 'already_running'; exit 0; fi; fi"
+
+if [[ -z "${MVP_INTERNAL_TOKEN:-}" ]]; then
+  echo "ERROR: MVP_INTERNAL_TOKEN env var must be set on host (will be passed into container)" >&2
+  exit 1
+fi
+
+docker exec -d -e MVP_INTERNAL_TOKEN="${MVP_INTERNAL_TOKEN}" "${HEAD_CONTAINER}" bash -lc "nohup python3 /workspace/mvp/py/server.py --config '${CONFIG_IN_CONTAINER}' >>'${LOG_PATH}' 2>&1 & echo \$! >'${PID_PATH}'"
+
+echo "[host] started; pid stored in ${PID_PATH} (container path)"
+echo "[host] logs: ${LOG_PATH} (container path)"
diff --git a/src/mvp/scripts/61_stop_api.sh b/src/mvp/scripts/61_stop_api.sh
new file mode 100755
index 0000000..f4b46b1
--- /dev/null
+++ b/src/mvp/scripts/61_stop_api.sh
@@ -0,0 +1,12 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=lib.sh
+source "${SCRIPT_DIR}/lib.sh"
+
+PID_PATH="${PID_PATH:-/private/common/run/argus_mvp_api.pid}"
+
+echo "[host] stopping mvp v2 api (pid file: ${PID_PATH})"
+
+dexec "${HEAD_CONTAINER}" bash -lc "if ! test -f '${PID_PATH}'; then echo 'not_running'; exit 0; fi; pid=\"\$(cat '${PID_PATH}')\"; if kill -0 \"\${pid}\" >/dev/null 2>&1; then kill \"\${pid}\"; fi; rm -f '${PID_PATH}'; echo 'stopped'"
diff --git a/src/mvp/scripts/62_status_api.sh b/src/mvp/scripts/62_status_api.sh
new file mode 100755
index 0000000..ec5b6c8
--- /dev/null
+++ b/src/mvp/scripts/62_status_api.sh
@@ -0,0 +1,10 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=lib.sh
+source "${SCRIPT_DIR}/lib.sh"
+
+PID_PATH="${PID_PATH:-/private/common/run/argus_mvp_api.pid}"
+
+dexec "${HEAD_CONTAINER}" bash -lc "if ! test -f '${PID_PATH}'; then echo 'not_running'; exit 0; fi; pid=\"\$(cat '${PID_PATH}')\"; if kill -0 \"\${pid}\" >/dev/null 2>&1; then echo \"running pid=\${pid}\"; else echo \"stale pid=\${pid}\"; fi"
diff --git a/src/mvp/v1.1/scripts/lib.sh b/src/mvp/scripts/lib.sh
old mode 100644
new mode 100755
similarity index 83%
rename from src/mvp/v1.1/scripts/lib.sh
rename to src/mvp/scripts/lib.sh
index 23e0997..778d1a6
--- a/src/mvp/v1.1/scripts/lib.sh
+++ b/src/mvp/scripts/lib.sh
@@ -6,9 +6,10 @@ ROOT_DIR="$(cd "${SCRIPT_DIR}/.." && pwd)"
 
 COMPOSE_FILE="${ROOT_DIR}/docker-compose.yaml"
 
-HEAD_CONTAINER="mvp11-ray-head"
-WORKER0_CONTAINER="mvp11-ray-worker-0"
-WORKER1_CONTAINER="mvp11-ray-worker-1"
+# Container names (refactor)
+HEAD_CONTAINER="${HEAD_CONTAINER:-argus-ray-head}"
+WORKER0_CONTAINER="${WORKER0_CONTAINER:-argus-ray-worker-0}"
+WORKER1_CONTAINER="${WORKER1_CONTAINER:-argus-ray-worker-1}"
 
 SHARED_ROOT="${SHARED_ROOT:-/private}"
 RAY_DASHBOARD_ADDR="${RAY_DASHBOARD_ADDR:-http://127.0.0.1:8265}"
@@ -49,4 +50,3 @@ container_ip() {
 timestamp() {
   date +"%Y%m%d_%H%M%S"
 }
-
diff --git a/src/mvp/scripts/run_all_api.sh b/src/mvp/scripts/run_all_api.sh
new file mode 100755
index 0000000..3ff190b
--- /dev/null
+++ b/src/mvp/scripts/run_all_api.sh
@@ -0,0 +1,120 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+# shellcheck source=lib.sh
+source "${SCRIPT_DIR}/lib.sh"
+
+# Run the end-to-end flow using the API service (argus.service).
+# This script restarts the Ray cluster, prepares model/data, starts the API,
+# then submits PPO/GRPO/SFT via HTTP API and monitors the queue.
+
+API_ADDR="${API_ADDR:-http://127.0.0.1:8080}"
+TOKEN="${MVP_INTERNAL_TOKEN:-}"
+DB_IN_CONTAINER="${DB_IN_CONTAINER:-/private/common/db/mvp.sqlite3}"
+
+if [[ -z "${TOKEN}" ]]; then
+  echo "ERROR: MVP_INTERNAL_TOKEN must be set in the host env for run_all_api.sh" >&2
+  exit 1
+fi
+
+api_curl() {
+  curl -sS -H "Authorization: Bearer ${TOKEN}" "$@"
+}
+
+api_wait_ready() {
+  local tries="${1:-60}"
+  for i in $(seq 1 "${tries}"); do
+    if curl -sS -m 2 "${API_ADDR}/docs" >/dev/null 2>&1; then
+      echo "[host] api_ready: ${API_ADDR}"
+      return 0
+    fi
+    echo "[host] waiting api... (${i}/${tries})"
+    sleep 2
+  done
+  echo "ERROR: api not ready: ${API_ADDR}" >&2
+  return 1
+}
+
+submit_taskspec() {
+  local taskspec_path="$1"
+  echo "[host] submit via API: ${taskspec_path}" >&2
+  local resp
+  resp="$(api_curl -H "Content-Type: application/yaml" --data-binary @"${taskspec_path}" "${API_ADDR}/api/v2/tasks")"
+  echo "[host] submit_resp: ${resp}" >&2
+  printf '%s' "${resp}" | python3 -c 'import sys,json; print(json.load(sys.stdin)["task_id"])'
+}
+
+print_queue() {
+  echo "[host] queue:"
+  api_curl "${API_ADDR}/api/v2/queue" || true
+  echo
+}
+
+wait_task() {
+  local task_id="$1"
+  while true; do
+    local body state
+    body="$(api_curl "${API_ADDR}/api/v2/tasks/${task_id}")"
+    state="$(printf '%s' "${body}" | python3 -c 'import sys,json; print(json.load(sys.stdin)["state"])')"
+    echo "[host] task ${task_id}: ${state}"
+
+    if [[ "${state}" == "SUCCEEDED" ]]; then
+      return 0
+    fi
+    if [[ "${state}" == "FAILED" || "${state}" == "CANCELED" ]]; then
+      echo "[host] terminal=${state}; tail logs (best-effort):" >&2
+      api_curl "${API_ADDR}/api/v2/tasks/${task_id}/logs?tail=200" >&2 || true
+      return 1
+    fi
+
+    print_queue
+    sleep 10
+  done
+}
+
+echo "[host] ===== run_all_api.sh begin ====="
+
+"${SCRIPT_DIR}/00_prereq_check.sh"
+"${SCRIPT_DIR}/03_cleanup_v1_legacy.sh"
+"${SCRIPT_DIR}/05_ensure_verl_repo.sh"
+
+echo "[host] (re)create containers"
+"${SCRIPT_DIR}/01_up.sh"
+
+echo "[host] restart ray cluster"
+"${SCRIPT_DIR}/20_start_head.sh"
+"${SCRIPT_DIR}/21_start_workers.sh"
+
+echo "[host] prepare data/model/code snapshot"
+"${SCRIPT_DIR}/30_prepare_data_and_model.sh"
+
+echo "[host] install api deps in head container"
+"${SCRIPT_DIR}/12_install_api_deps.sh"
+
+echo "[host] stop api (best-effort)"
+"${SCRIPT_DIR}/61_stop_api.sh" || true
+
+echo "[host] reset api sqlite db in container (best-effort): ${DB_IN_CONTAINER}"
+dexec "${HEAD_CONTAINER}" bash -lc "mkdir -p \"$(dirname "${DB_IN_CONTAINER}")\"; rm -f '${DB_IN_CONTAINER}' '${DB_IN_CONTAINER}-wal' '${DB_IN_CONTAINER}-shm' || true"
+
+echo "[host] start api"
+MVP_INTERNAL_TOKEN="${TOKEN}" "${SCRIPT_DIR}/60_start_api.sh"
+api_wait_ready 60
+
+print_queue
+PPO_TASK_ID="$(submit_taskspec "${ROOT_DIR}/taskspecs/ppo.yaml")"
+GRPO_TASK_ID="$(submit_taskspec "${ROOT_DIR}/taskspecs/grpo.yaml")"
+SFT_TASK_ID="$(submit_taskspec "${ROOT_DIR}/taskspecs/sft.yaml")"
+
+echo "[host] submitted task ids:"
+echo "  ppo=${PPO_TASK_ID}"
+echo "  grpo=${GRPO_TASK_ID}"
+echo "  sft=${SFT_TASK_ID}"
+
+echo "[host] wait for tasks (in submission order)"
+wait_task "${PPO_TASK_ID}"
+wait_task "${GRPO_TASK_ID}"
+wait_task "${SFT_TASK_ID}"
+
+echo "[host] ===== run_all_api.sh done ====="
diff --git a/src/mvp/v1.1/scripts/run_all.sh b/src/mvp/scripts/run_all_cli.sh
old mode 100644
new mode 100755
similarity index 51%
rename from src/mvp/v1.1/scripts/run_all.sh
rename to src/mvp/scripts/run_all_cli.sh
index 1df293d..3e89801
--- a/src/mvp/v1.1/scripts/run_all.sh
+++ b/src/mvp/scripts/run_all_cli.sh
@@ -5,13 +5,16 @@ SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 # shellcheck source=lib.sh
 source "${SCRIPT_DIR}/lib.sh"
 
+# Run the end-to-end flow using the CLI submitter (argus.cli).
+# This script restarts the Ray cluster and submits PPO/GRPO/SFT sequentially.
+
 submit_and_wait() {
-  local jobspec_in_container="$1"
+  local taskspec_in_container="$1"
   local sid
   local out
 
-  echo "[host] submit via SDK: ${jobspec_in_container}"
-  out="$(dexec "${HEAD_CONTAINER}" bash -lc "python3 /workspace/mvp/v1.1/py/run.py --config /workspace/mvp/v1.1/py/configs/dev.yaml --jobspec '${jobspec_in_container}' --action submit --no-wait" | tr -d '\r')"
+  echo "[host] submit via SDK: ${taskspec_in_container}"
+  out="$(dexec "${HEAD_CONTAINER}" bash -lc "cd /workspace/mvp/py && python3 -m argus.cli.run --config /workspace/mvp/configs/dev.yaml --taskspec '${taskspec_in_container}' --action submit --no-wait" | tr -d '\r')"
   sid="$(printf '%s\n' "${out}" | tail -n 1)"
 
   if [[ -z "${sid}" ]]; then
@@ -23,7 +26,7 @@ submit_and_wait() {
   echo "[host] submitted: ${sid}"
 
   while true; do
-    st="$(dexec "${HEAD_CONTAINER}" bash -lc "python3 /workspace/mvp/v1.1/py/run.py --config /workspace/mvp/v1.1/py/configs/dev.yaml --action status --submission-id '${sid}'" | tr -d '\r' | tail -n 1)"
+    st="$(dexec "${HEAD_CONTAINER}" bash -lc "cd /workspace/mvp/py && python3 -m argus.cli.run --config /workspace/mvp/configs/dev.yaml --action status --submission-id '${sid}'" | tr -d '\r' | tail -n 1)"
     echo "[host] status: ${sid} -> ${st}"
     case "${st}" in
       *SUCCEEDED*)
@@ -32,7 +35,7 @@ submit_and_wait() {
       *FAILED*|*STOPPED*)
         echo "[host] job failed: ${sid} (${st})" >&2
         echo "[host] last logs:" >&2
-        dexec "${HEAD_CONTAINER}" bash -lc "python3 /workspace/mvp/v1.1/py/run.py --config /workspace/mvp/v1.1/py/configs/dev.yaml --action logs --submission-id '${sid}' --tail 200" >&2 || true
+        dexec "${HEAD_CONTAINER}" bash -lc "cd /workspace/mvp/py && python3 -m argus.cli.run --config /workspace/mvp/configs/dev.yaml --action logs --submission-id '${sid}' --tail 200" >&2 || true
         return 1
         ;;
       *)
@@ -50,7 +53,7 @@ submit_and_wait() {
 "${SCRIPT_DIR}/21_start_workers.sh"
 "${SCRIPT_DIR}/30_prepare_data_and_model.sh"
 "${SCRIPT_DIR}/12_install_py_deps.sh"
-submit_and_wait /workspace/mvp/v1.1/py/jobspecs/ppo.yaml
-submit_and_wait /workspace/mvp/v1.1/py/jobspecs/grpo.yaml
-submit_and_wait /workspace/mvp/v1.1/py/jobspecs/sft.yaml
+submit_and_wait /workspace/mvp/taskspecs/ppo.yaml
+submit_and_wait /workspace/mvp/taskspecs/grpo.yaml
+submit_and_wait /workspace/mvp/taskspecs/sft.yaml
 "${SCRIPT_DIR}/50_status.sh"
diff --git a/src/mvp/taskspecs/README.md b/src/mvp/taskspecs/README.md
new file mode 100644
index 0000000..e8fb073
--- /dev/null
+++ b/src/mvp/taskspecs/README.md
@@ -0,0 +1,10 @@
+# TaskSpecs
+
+这里的 `*.yaml` 是 **TaskSpec**（训练任务语义参数），用于描述要跑的 workload（PPO/GRPO/SFT）以及数据/模型路径、训练步数、分布式规模等。
+
+注意区分：
+- **TaskSpec**：训练语义（本目录）
+- **Ray Job**：Ray Jobs 的 submission（由 submitter 将 TaskSpec 转换为 Ray Job entrypoint + runtime_env 等）
+
+字段保持与原 v1.1 `jobspecs/` 一致（迁移期不做字段改名/规范化，以降低风险）。
+
diff --git a/src/mvp/v1.1/py/jobspecs/grpo.yaml b/src/mvp/taskspecs/grpo.yaml
similarity index 100%
rename from src/mvp/v1.1/py/jobspecs/grpo.yaml
rename to src/mvp/taskspecs/grpo.yaml
diff --git a/src/mvp/v1.1/py/jobspecs/ppo.yaml b/src/mvp/taskspecs/ppo.yaml
similarity index 100%
rename from src/mvp/v1.1/py/jobspecs/ppo.yaml
rename to src/mvp/taskspecs/ppo.yaml
diff --git a/src/mvp/v1.1/py/jobspecs/sft.yaml b/src/mvp/taskspecs/sft.yaml
similarity index 100%
rename from src/mvp/v1.1/py/jobspecs/sft.yaml
rename to src/mvp/taskspecs/sft.yaml
diff --git a/src/mvp/v1.1/README.md b/src/mvp/v1.1/README.md
deleted file mode 100644
index 63a7a5b..0000000
--- a/src/mvp/v1.1/README.md
+++ /dev/null
@@ -1,65 +0,0 @@
-# MVP v1.1（GRPO + SFT on Ray）运行说明
-
-本目录是一套**独立可运行**的 v1.1 交付：使用 1 个 Ray head（不跑训练）+ 2 个 Ray worker（各 4 GPU）在同一宿主机通过 `docker exec` 协调容器，并通过 **head 上的 `ray job submit`** 提交作业，同时强制 driver 落到 worker。
-
-> 远程 dev 环境推荐目录布局：
->
-> - `/home2/argus/infra/mvp/`
->   - `shared/`（持久化：datasets/hf/jobs/...）
->   - `verl/`（代码仓库，用于 prepare / snapshot）
->   - `v1.1/`（本目录内容：compose + scripts）
-
----
-
-## 快速开始（远程机 argus@h1）
-
-在 `/home2/argus/infra/mvp/v1.1/` 下执行：
-
-```bash
-./scripts/run_all.sh
-```
-
-说明：
-- `run_all.sh` 会按顺序提交 `ppo -> grpo -> sft`，并等待每个 job 结束后再提交下一个（避免 8 卡集群并发提交导致 “available GPUs 0” 直接失败）。
-
-等价的“分步执行”：
-
-```bash
-./scripts/00_prereq_check.sh
-./scripts/03_cleanup_v1_legacy.sh
-./scripts/05_ensure_verl_repo.sh
-./scripts/01_up.sh
-./scripts/20_start_head.sh
-./scripts/21_start_workers.sh
-./scripts/30_prepare_data_and_model.sh
-./scripts/12_install_py_deps.sh
-./scripts/44_submit_sdk.sh /workspace/mvp/v1.1/py/configs/dev.yaml /workspace/mvp/v1.1/py/jobspecs/ppo.yaml   # no-wait
-./scripts/44_submit_sdk.sh /workspace/mvp/v1.1/py/configs/dev.yaml /workspace/mvp/v1.1/py/jobspecs/grpo.yaml  # no-wait
-./scripts/44_submit_sdk.sh /workspace/mvp/v1.1/py/configs/dev.yaml /workspace/mvp/v1.1/py/jobspecs/sft.yaml   # no-wait
-./scripts/50_status.sh
-```
-
-停止并清理：
-
-```bash
-./scripts/02_down.sh
-```
-
----
-
-## 关键约束（必须满足）
-
-- **必须通过 head 执行 `ray job submit`** 提交任务（满足“从 head 提交”要求）。
-- **head 不跑训练**：head 以 `--num-cpus=0 --num-gpus=0` 启动；worker 具备自定义资源 `worker_node`；提交时 `--entrypoint-resources='{"worker_node": 1}'` 强制 driver 落 worker。
-- **共享路径统一为 `/private`（容器内）**：compose 将宿主机 `../shared` 挂载到容器内 `/private`，对齐生产环境。
-- **job 级别 code_path**：训练 JobSpec 中的 `code_path` 指向 `/private/common/code/verl/verl_repo`（由 `scripts/30_prepare_data_and_model.sh` 准备）。
-
----
-
-## 共享目录（容器内 /private）
-
-- `/private/datasets/`：数据（PPO 的 gsm8k RL parquet、SFT parquet）
-- `/private/hf/`：HF 缓存（模型持久化，避免重复下载）
-- `/private/jobs/<submission_id>/`：每个 Ray Job 的输出目录（logs/config/debug/checkpoints）
-- `/private/common/`：共享区（模型/数据/代码快照）
-- `/private/user/`：用户自定义代码（例如 reward_fn）
diff --git a/src/mvp/v1.1/py/configs/dev.yaml b/src/mvp/v1.1/py/configs/dev.yaml
deleted file mode 100644
index c0244e6..0000000
--- a/src/mvp/v1.1/py/configs/dev.yaml
+++ /dev/null
@@ -1,38 +0,0 @@
-# Ray 基础配置（dev 环境 / head 容器内视角）
-#
-# 说明：
-# - v1.1 的 SDK submitter 会读取本文件作为 RayConfig。
-# - v2.0 的 API 服务/调度器也复用本文件作为“基础 RayConfig”，并在其上扩展 v2 专属配置项（见 v2:）。
-address: "http://127.0.0.1:8265"
-
-# 容器内共享根路径（对齐生产 /private）
-shared_root: "/private"
-
-# 强制 driver 落 worker（head 不跑训练）
-entrypoint_num_cpus: 1
-entrypoint_resources:
-  worker_node: 1
-
-# 运行时环境变量（所有 job 通用）
-runtime_env:
-  env_vars:
-    HF_ENDPOINT: "https://hf-mirror.com"
-    PYTHONUNBUFFERED: "1"
-
-# 用户自定义代码目录（可被 PYTHONPATH 注入）
-user_code_path: "/private/user/code"
-
-# v2.0 服务层配置（v1.1 submitter 会忽略这些字段；v2.0 服务会读取）
-v2:
-  api:
-    host: "0.0.0.0"
-    port: 8080
-  auth:
-    # 内部 token 建议通过环境变量提供，避免写入配置文件
-    token_env: "MVP_INTERNAL_TOKEN"
-  sqlite:
-    db_path: "/private/common/db/mvp_v2.sqlite3"
-  scheduler:
-    tick_s: 5
-    retry_interval_s: 60
-    max_running_tasks: 1
diff --git a/src/mvp/v1.1/py/mvp_v11/models.py b/src/mvp/v1.1/py/mvp_v11/models.py
deleted file mode 100644
index 41f8804..0000000
--- a/src/mvp/v1.1/py/mvp_v11/models.py
+++ /dev/null
@@ -1,121 +0,0 @@
-from __future__ import annotations
-
-from dataclasses import dataclass
-from typing import Any
-
-
-def _require(d: dict[str, Any], key: str) -> Any:
-    if key not in d or d[key] in (None, ""):
-        raise ValueError(f"missing required field: {key}")
-    return d[key]
-
-
-@dataclass(frozen=True)
-class RayConfig:
-    address: str
-    shared_root: str
-    entrypoint_num_cpus: float
-    entrypoint_resources: dict[str, float]
-    runtime_env_env_vars: dict[str, str]
-    user_code_path: str
-
-    @staticmethod
-    def from_dict(d: dict[str, Any]) -> "RayConfig":
-        runtime_env = d.get("runtime_env") or {}
-        env_vars = (runtime_env.get("env_vars") or {}) if isinstance(runtime_env, dict) else {}
-        if not isinstance(env_vars, dict):
-            raise ValueError("runtime_env.env_vars must be a mapping")
-
-        entrypoint_resources = d.get("entrypoint_resources") or {}
-        if not isinstance(entrypoint_resources, dict):
-            raise ValueError("entrypoint_resources must be a mapping")
-
-        return RayConfig(
-            address=str(_require(d, "address")),
-            shared_root=str(_require(d, "shared_root")),
-            entrypoint_num_cpus=float(d.get("entrypoint_num_cpus", 1)),
-            entrypoint_resources={str(k): float(v) for k, v in entrypoint_resources.items()},
-            runtime_env_env_vars={str(k): str(v) for k, v in env_vars.items()},
-            user_code_path=str(d.get("user_code_path", f"{_require(d, 'shared_root')}/user/code")),
-        )
-
-    def to_public_dict(self) -> dict[str, Any]:
-        return {
-            "address": self.address,
-            "shared_root": self.shared_root,
-            "entrypoint_num_cpus": self.entrypoint_num_cpus,
-            "entrypoint_resources": self.entrypoint_resources,
-            "runtime_env": {"env_vars": self.runtime_env_env_vars},
-            "user_code_path": self.user_code_path,
-        }
-
-
-@dataclass(frozen=True)
-class JobSpec:
-    workload: str  # ppo|grpo|sft
-    submission_id: str | None
-    code_path: str
-    model_id: str
-
-    train_file: str
-    val_file: str | None
-
-    nnodes: int
-    n_gpus_per_node: int
-
-    total_epochs: int
-    total_training_steps: int
-
-    save_freq: int
-    test_freq: int | None
-
-    trainer_device: str | None  # only for sft (driver-side device)
-
-    @staticmethod
-    def from_dict(d: dict[str, Any]) -> "JobSpec":
-        workload = str(_require(d, "workload"))
-        if workload not in ("ppo", "grpo", "sft"):
-            raise ValueError(f"unsupported workload: {workload}")
-
-        val_file = d.get("val_file", None)
-        if val_file in ("", "null"):
-            val_file = None
-
-        test_freq = d.get("test_freq", None)
-        if test_freq in ("", "null"):
-            test_freq = None
-
-        return JobSpec(
-            workload=workload,
-            submission_id=(str(d["submission_id"]) if d.get("submission_id") else None),
-            code_path=str(_require(d, "code_path")),
-            model_id=str(_require(d, "model_id")),
-            train_file=str(_require(d, "train_file")),
-            val_file=(str(val_file) if val_file is not None else None),
-            nnodes=int(d.get("nnodes", 2)),
-            n_gpus_per_node=int(d.get("n_gpus_per_node", 4)),
-            total_epochs=int(d.get("total_epochs", 1)),
-            total_training_steps=int(d.get("total_training_steps", 10)),
-            save_freq=int(d.get("save_freq", 10)),
-            test_freq=(int(test_freq) if test_freq is not None else None),
-            trainer_device=(str(d.get("trainer_device")) if d.get("trainer_device") else None),
-        )
-
-    def to_public_dict(self) -> dict[str, Any]:
-        out: dict[str, Any] = {
-            "workload": self.workload,
-            "submission_id": self.submission_id or "",
-            "code_path": self.code_path,
-            "model_id": self.model_id,
-            "train_file": self.train_file,
-            "val_file": self.val_file,
-            "nnodes": self.nnodes,
-            "n_gpus_per_node": self.n_gpus_per_node,
-            "total_epochs": self.total_epochs,
-            "total_training_steps": self.total_training_steps,
-            "save_freq": self.save_freq,
-            "test_freq": self.test_freq,
-        }
-        if self.workload == "sft":
-            out["trainer_device"] = self.trainer_device or "cpu"
-        return out
diff --git a/src/mvp/v1.1/py/requirements.txt b/src/mvp/v1.1/py/requirements.txt
deleted file mode 100644
index e3af026..0000000
--- a/src/mvp/v1.1/py/requirements.txt
+++ /dev/null
@@ -1,2 +0,0 @@
-PyYAML>=6.0.1
-
diff --git a/src/mvp/v1.1/scripts/12_install_py_deps.sh b/src/mvp/v1.1/scripts/12_install_py_deps.sh
deleted file mode 100644
index da1649c..0000000
--- a/src/mvp/v1.1/scripts/12_install_py_deps.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-# shellcheck source=lib.sh
-source "${SCRIPT_DIR}/lib.sh"
-
-echo "[head] install python deps for v1.1 SDK submitter (PyYAML)"
-dexec "${HEAD_CONTAINER}" bash -lc "pip install -r /workspace/mvp/v1.1/py/requirements.txt"
-
diff --git a/src/mvp/v1.1/scripts/44_submit_sdk.sh b/src/mvp/v1.1/scripts/44_submit_sdk.sh
deleted file mode 100644
index d7bf010..0000000
--- a/src/mvp/v1.1/scripts/44_submit_sdk.sh
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-# shellcheck source=lib.sh
-source "${SCRIPT_DIR}/lib.sh"
-
-CONFIG_PATH="${1:-/workspace/mvp/v1.1/py/configs/dev.yaml}"
-JOBSPEC_PATH="${2:-}"
-
-if [[ -z "${JOBSPEC_PATH}" ]]; then
-  echo "usage: $0 <ray_config_yaml_in_container> <jobspec_yaml_in_container>" >&2
-  echo "example: $0 /workspace/mvp/v1.1/py/configs/dev.yaml /workspace/mvp/v1.1/py/jobspecs/ppo.yaml" >&2
-  exit 1
-fi
-
-echo "[head] submit via Ray Python SDK"
-dexec "${HEAD_CONTAINER}" bash -lc "python3 /workspace/mvp/v1.1/py/run.py --config '${CONFIG_PATH}' --jobspec '${JOBSPEC_PATH}' --action submit --no-wait"
-
diff --git a/src/mvp/v2.0/README.md b/src/mvp/v2.0/README.md
deleted file mode 100644
index 5f20c18..0000000
--- a/src/mvp/v2.0/README.md
+++ /dev/null
@@ -1,104 +0,0 @@
-# MVP v2.0（服务化入口）
-
-v2.0 在 v1.1（Ray Jobs SDK 提交链路）基础上新增一个**服务层**：
-- HTTP API 提交任务（PPO/GRPO/SFT）
-- 服务侧队列 + gang 资源判断
-- 识别 `verl` fail-fast 的资源不足失败并自动重试
-- SQLite 持久化队列/状态/attempt（NFS：`/private`）
-
-设计文档见：
-- `specs/mvp/v2.0/v2_plan.md`
-- `specs/mvp/v2.0/v2_api.md`
-
-## 快速开始（dev 示例）
-
-约定：
-- Ray 容器仍由 v1.1 的 `docker-compose.yaml` 启动（head+2 workers）
-- v2 代码在宿主机：`/home2/argus/infra/mvp/v2/`（容器内挂载 `/workspace/mvp/v2/`）
-- v2 配置复用 v1.1：`/workspace/mvp/v1.1/py/configs/dev.yaml`（扩展了 `v2:` 段）
-
-宿主机执行：
-
-```bash
-export MVP_INTERNAL_TOKEN=...    # 内部 token
-cd /home2/argus/infra/mvp/v2/scripts
-./12_install_v2_deps.sh
-./20_start_api.sh
-./22_status_api.sh
-```
-
-API 测试（宿主机）：
-
-```bash
-curl -H "Authorization: Bearer ${MVP_INTERNAL_TOKEN}" http://127.0.0.1:8080/api/v2/queue
-```
-
-> 进程日志与 pid（容器内路径）默认在 `/private/common/logs/` 与 `/private/common/run/`。
-
-## 提交/查询/停止任务
-
-约定：
-- API 地址（宿主机视角）：`http://127.0.0.1:8080`
-- 鉴权：`Authorization: Bearer ${MVP_INTERNAL_TOKEN}`
-- 请求体：**raw YAML**（JobSpec，格式与 v1.1 jobspec 一致）
-
-### 1) 提交任务（POST /api/v2/tasks）
-
-准备一个 jobspec（示例：PPO）：
-
-```yaml
-workload: "ppo"
-submission_id: ""              # v2 会忽略/覆盖，自动生成 task_id 并派生 ray_submission_id
-code_path: "/private/common/code/verl/verl_repo"
-model_id: "Qwen/Qwen2.5-0.5B-Instruct"
-train_file: "/private/datasets/gsm8k/train.parquet"
-val_file: "/private/datasets/gsm8k/test.parquet"
-nnodes: 2
-n_gpus_per_node: 4
-total_epochs: 1
-total_training_steps: 10
-save_freq: 10
-test_freq: -1
-trainer_device: null
-```
-
-提交：
-
-```bash
-curl -sS \
-  -H "Authorization: Bearer ${MVP_INTERNAL_TOKEN}" \
-  -H "Content-Type: application/yaml" \
-  --data-binary @jobspec.yaml \
-  http://127.0.0.1:8080/api/v2/tasks
-```
-
-返回示例：
-
-```json
-{"task_id":"mvp2-ppo-20251223-082813-6426","state":"QUEUED"}
-```
-
-### 2) 查询任务（GET /api/v2/tasks/{task_id}）
-
-```bash
-curl -sS \
-  -H "Authorization: Bearer ${MVP_INTERNAL_TOKEN}" \
-  http://127.0.0.1:8080/api/v2/tasks/<task_id> | python3 -m json.tool
-```
-
-可选：
-- 查看 attempts：`GET /api/v2/tasks/{task_id}/attempts`
-- 拉取日志（latest attempt）：`GET /api/v2/tasks/{task_id}/logs?tail=2000`
-- 查看队列：`GET /api/v2/queue`
-
-### 3) 停止/取消任务（POST /api/v2/tasks/{task_id}:cancel）
-
-```bash
-curl -sS -X POST \
-  -H "Authorization: Bearer ${MVP_INTERNAL_TOKEN}" \
-  http://127.0.0.1:8080/api/v2/tasks/<task_id>:cancel
-```
-
-说明：
-- 若任务已提交到 Ray（`SUBMITTED/RUNNING`），服务会调用 Ray Jobs SDK `stop_job(ray_submission_id)`。
-- 若任务仍在队列（`QUEUED/PENDING_RESOURCES`），服务直接标记 `CANCELED`（不会产生 attempt）。
diff --git a/src/mvp/v2.0/py/mvp_v11/__init__.py b/src/mvp/v2.0/py/mvp_v11/__init__.py
deleted file mode 100644
index 8b13789..0000000
--- a/src/mvp/v2.0/py/mvp_v11/__init__.py
+++ /dev/null
@@ -1 +0,0 @@
-
diff --git a/src/mvp/v2.0/py/mvp_v11/builders.py b/src/mvp/v2.0/py/mvp_v11/builders.py
deleted file mode 100644
index d4b9786..0000000
--- a/src/mvp/v2.0/py/mvp_v11/builders.py
+++ /dev/null
@@ -1,96 +0,0 @@
-from __future__ import annotations
-
-from dataclasses import dataclass
-
-from .models import JobSpec
-
-
-@dataclass(frozen=True)
-class BuiltCommand:
-    argv: list[str]
-
-
-def build_training_argv(spec: JobSpec, submission_id: str, job_dir: str) -> BuiltCommand:
-    """
-    Returns argv for the actual training process (Hydra overrides preserved).
-    This argv is executed by a lightweight Python driver entrypoint.
-    """
-    if spec.workload in ("ppo", "grpo"):
-        algo_overrides: list[str] = []
-        if spec.workload == "grpo":
-            algo_overrides.append("algorithm.adv_estimator=grpo")
-
-        test_freq = spec.test_freq if spec.test_freq is not None else -1
-        val_file = spec.val_file if spec.val_file is not None else "null"
-
-        argv = [
-            "python3",
-            "-m",
-            "verl.trainer.main_ppo",
-            f"data.train_files={spec.train_file}",
-            f"data.val_files={val_file}",
-            "data.train_batch_size=256",
-            "data.max_prompt_length=512",
-            "data.max_response_length=512",
-            f"actor_rollout_ref.model.path={spec.model_id}",
-            "actor_rollout_ref.actor.optim.lr=1e-6",
-            "actor_rollout_ref.actor.ppo_mini_batch_size=64",
-            "actor_rollout_ref.actor.ppo_micro_batch_size_per_gpu=4",
-            "actor_rollout_ref.rollout.name=sglang",
-            "actor_rollout_ref.rollout.log_prob_micro_batch_size_per_gpu=8",
-            "actor_rollout_ref.rollout.tensor_model_parallel_size=1",
-            "actor_rollout_ref.rollout.gpu_memory_utilization=0.4",
-            "actor_rollout_ref.ref.log_prob_micro_batch_size_per_gpu=4",
-            "critic.optim.lr=1e-5",
-            f"critic.model.path={spec.model_id}",
-            "critic.ppo_micro_batch_size_per_gpu=4",
-            "algorithm.kl_ctrl.kl_coef=0.001",
-            *algo_overrides,
-            "trainer.logger=console",
-            "trainer.val_before_train=False",
-            f"trainer.n_gpus_per_node={spec.n_gpus_per_node}",
-            f"trainer.nnodes={spec.nnodes}",
-            f"trainer.save_freq={spec.save_freq}",
-            f"trainer.test_freq={test_freq}",
-            f"trainer.total_epochs={spec.total_epochs}",
-            f"trainer.total_training_steps={spec.total_training_steps}",
-            "trainer.resume_mode=disable",
-            f"trainer.default_local_dir={job_dir}/checkpoints",
-            "+ray_kwargs.ray_init.address=auto",
-            f"hydra.run.dir={job_dir}/logs/hydra",
-        ]
-        return BuiltCommand(argv=argv)
-
-    if spec.workload == "sft":
-        val_override = "null" if spec.val_file is None else spec.val_file
-        trainer_device = spec.trainer_device or "cpu"
-
-        argv = [
-            "python3",
-            "-m",
-            "verl.trainer.sft_trainer_ray",
-            f"model.path={spec.model_id}",
-            f"data.train_files={spec.train_file}",
-            f"data.val_files={val_override}",
-            "data.train_batch_size=64",
-            "data.micro_batch_size_per_gpu=1",
-            "data.max_token_len_per_gpu=2048",
-            "data.max_length=1024",
-            "trainer.logger=console",
-            "trainer.project_name=mvp11-sft",
-            f"trainer.experiment_name={submission_id}",
-            f"trainer.total_epochs={spec.total_epochs}",
-            f"trainer.total_training_steps={spec.total_training_steps}",
-            f"trainer.save_freq={spec.save_freq}",
-            "trainer.test_freq=-1",
-            "trainer.resume_mode=disable",
-            f"trainer.device={trainer_device}",
-            f"trainer.default_local_dir={job_dir}/checkpoints",
-            f"trainer.nnodes={spec.nnodes}",
-            f"trainer.n_gpus_per_node={spec.n_gpus_per_node}",
-            f"hydra.run.dir={job_dir}/logs/hydra",
-        ]
-        return BuiltCommand(argv=argv)
-
-    raise ValueError(f"unsupported workload: {spec.workload}")
-
diff --git a/src/mvp/v2.0/py/mvp_v11/driver_entrypoint.py b/src/mvp/v2.0/py/mvp_v11/driver_entrypoint.py
deleted file mode 100644
index 9f99c58..0000000
--- a/src/mvp/v2.0/py/mvp_v11/driver_entrypoint.py
+++ /dev/null
@@ -1,63 +0,0 @@
-from __future__ import annotations
-
-import argparse
-import os
-import shlex
-import subprocess
-import sys
-from pathlib import Path
-
-
-def _preflight() -> None:
-    print("MVP_PRECHECK_PYTHON:", sys.executable, flush=True)
-    print("MVP_PRECHECK_PYTHONPATH:", os.environ.get("PYTHONPATH"), flush=True)
-    print("MVP_PRECHECK_MVP_CODE_PATH:", os.environ.get("MVP_CODE_PATH"), flush=True)
-    try:
-        import verl  # type: ignore
-
-        print("MVP_PRECHECK_VERL_FILE:", getattr(verl, "__file__", None), flush=True)
-    except Exception as e:
-        print("MVP_PRECHECK_VERL_IMPORT_ERROR:", repr(e), flush=True)
-
-    try:
-        import mvp_marker  # type: ignore
-
-        print("MVP_PRECHECK_MARKER:", getattr(mvp_marker, "MARKER", None), flush=True)
-    except Exception as e:
-        print("MVP_PRECHECK_MARKER_MISSING:", repr(e), flush=True)
-
-
-def main() -> int:
-    parser = argparse.ArgumentParser()
-    parser.add_argument("--job-dir", required=True)
-    parser.add_argument("cmd", nargs=argparse.REMAINDER)
-    args = parser.parse_args()
-
-    job_dir = Path(args.job_dir)
-    job_dir.mkdir(parents=True, exist_ok=True)
-
-    _preflight()
-
-    if not args.cmd:
-        print("no command provided", file=sys.stderr)
-        return 2
-
-    # argparse includes the leading "--" if the caller uses it; strip it.
-    cmd = list(args.cmd)
-    if cmd and cmd[0] == "--":
-        cmd = cmd[1:]
-    if not cmd:
-        print("no command provided", file=sys.stderr)
-        return 2
-
-    # Execute training command as a subprocess so that logs are captured by Ray job logs.
-    cmd_str = " ".join(shlex.quote(x) for x in cmd)
-    print("MVP_DRIVER_EXEC:", cmd_str, flush=True)
-
-    proc = subprocess.run(cmd, check=False)
-    print("MVP_DRIVER_EXIT_CODE:", proc.returncode, flush=True)
-    return proc.returncode
-
-
-if __name__ == "__main__":
-    raise SystemExit(main())
diff --git a/src/mvp/v2.0/py/mvp_v11/ray_job_tool.py b/src/mvp/v2.0/py/mvp_v11/ray_job_tool.py
deleted file mode 100644
index 01b899a..0000000
--- a/src/mvp/v2.0/py/mvp_v11/ray_job_tool.py
+++ /dev/null
@@ -1,171 +0,0 @@
-from __future__ import annotations
-
-import json
-import os
-import shlex
-from datetime import datetime
-from pathlib import Path
-from typing import Any
-
-import ray
-from ray.job_submission import JobSubmissionClient
-
-from .builders import build_training_argv
-from .models import JobSpec, RayConfig
-from .yaml_io import dump_yaml
-
-
-def _ts() -> str:
-    return datetime.now().strftime("%Y%m%d_%H%M%S")
-
-
-def _mkdir(p: Path) -> None:
-    p.mkdir(parents=True, exist_ok=True)
-
-
-def _write_text(p: Path, content: str) -> None:
-    _mkdir(p.parent)
-    p.write_text(content, encoding="utf-8")
-
-
-def _write_json(p: Path, obj: Any) -> None:
-    _write_text(p, json.dumps(obj, indent=2, ensure_ascii=False) + "\n")
-
-
-def _safe_basename(path: str) -> str:
-    return path.rstrip("/").split("/")[-1]
-
-
-class RayJobTool:
-    def __init__(self, cfg: RayConfig):
-        self.cfg = cfg
-        self.client = JobSubmissionClient(cfg.address)
-
-    def _job_dir(self, submission_id: str) -> str:
-        return f"{self.cfg.shared_root}/jobs/{submission_id}"
-
-    def _runtime_env(self, spec: JobSpec) -> dict[str, Any]:
-        env_vars = dict(self.cfg.runtime_env_env_vars)
-
-        # Default HF cache
-        env_vars.setdefault("HF_HOME", f"{self.cfg.shared_root}/hf")
-        env_vars.setdefault("HUGGINGFACE_HUB_CACHE", f"{self.cfg.shared_root}/hf/hub")
-        env_vars.setdefault("TRANSFORMERS_CACHE", f"{self.cfg.shared_root}/hf/transformers")
-        env_vars.setdefault("PYTHONUNBUFFERED", "1")
-
-        # Tool code path must be importable on workers (compose mounts v1.1 into all containers).
-        # Place it before verl code to avoid interfering with verl import priority.
-        tool_code_path = os.environ.get("MVP_TOOL_CODE_PATH", "/workspace/mvp/v1.1/py")
-
-        user_code_path = self.cfg.user_code_path
-        code_path = spec.code_path
-
-        existing = env_vars.get("PYTHONPATH", "")
-        prefix = f"{tool_code_path}:{code_path}:{user_code_path}"
-        env_vars["PYTHONPATH"] = f"{prefix}:{existing}" if existing else prefix
-
-        # For debugging / log visibility
-        env_vars["MVP_CODE_PATH"] = code_path
-
-        # SFT: ensure ray.init() connects to the cluster
-        if spec.workload == "sft":
-            env_vars.setdefault("RAY_ADDRESS", "auto")
-
-        return {"env_vars": env_vars}
-
-    def submit(self, spec: JobSpec, no_wait: bool) -> str:
-        submission_id = spec.submission_id or f"mvp11_{spec.workload}_{_ts()}_{os.getpid()}"
-        job_dir = self._job_dir(submission_id)
-
-        built = build_training_argv(spec, submission_id=submission_id, job_dir=job_dir)
-        entrypoint_argv = [
-            "python3",
-            "-m",
-            "mvp_v11.driver_entrypoint",
-            "--job-dir",
-            job_dir,
-            *built.argv,
-        ]
-        entrypoint = " ".join(shlex.quote(x) for x in entrypoint_argv)
-
-        runtime_env = self._runtime_env(spec)
-
-        # Prepare job artifacts directory
-        job_root = Path(job_dir)
-        _mkdir(job_root / "config")
-        _mkdir(job_root / "logs")
-        _mkdir(job_root / "debug")
-        _mkdir(job_root / "checkpoints")
-
-        _write_text(job_root / "config" / "ray_config.yaml", dump_yaml(self.cfg.to_public_dict()))
-        _write_text(job_root / "config" / "jobspec.yaml", dump_yaml(spec.to_public_dict()))
-        _write_json(job_root / "config" / "submit_payload.json", {
-            "submission_id": submission_id,
-            "address": self.cfg.address,
-            "entrypoint": entrypoint,
-            "entrypoint_num_cpus": self.cfg.entrypoint_num_cpus,
-            "entrypoint_resources": self.cfg.entrypoint_resources,
-            "runtime_env": runtime_env,
-        })
-
-        # Pre-submit debug snapshot (ray cluster resources via ray.init)
-        try:
-            ray.init(address="auto", ignore_reinit_error=True, log_to_driver=False)
-            _write_json(job_root / "debug" / "ray_cluster_resources_pre.json", ray.cluster_resources())
-            _write_json(job_root / "debug" / "ray_available_resources_pre.json", ray.available_resources())
-        except Exception as e:
-            _write_text(job_root / "debug" / "ray_resources_pre.error.txt", repr(e) + "\n")
-
-        try:
-            submitted = self.client.submit_job(
-                entrypoint=entrypoint,
-                submission_id=submission_id,
-                runtime_env=runtime_env,
-                entrypoint_num_cpus=self.cfg.entrypoint_num_cpus,
-                entrypoint_resources=self.cfg.entrypoint_resources,
-            )
-        except Exception as e:
-            _write_text(job_root / "logs" / "submit.error.txt", repr(e) + "\n")
-            raise
-
-        _write_text(job_root / "config" / "ray_submission_id.txt", submitted + "\n")
-
-        # Post-submit debug snapshot via SDK
-        try:
-            jobs = self.client.list_jobs()
-            _write_text(
-                job_root / "debug" / "ray_job_list_post.json",
-                json.dumps([_job_details_to_dict(j) for j in jobs], indent=2) + "\n",
-            )
-        except Exception as e:
-            _write_text(job_root / "debug" / "ray_job_list_post.error.txt", repr(e) + "\n")
-
-        if not no_wait:
-            # caller can separately wait; keep submit non-blocking by default in scripts
-            pass
-
-        return submitted
-
-    def status(self, submission_id: str) -> str:
-        return str(self.client.get_job_status(submission_id))
-
-    def stop(self, submission_id: str) -> bool:
-        return bool(self.client.stop_job(submission_id))
-
-    def logs(self, submission_id: str) -> str:
-        return self.client.get_job_logs(submission_id)
-
-    def list(self) -> list[dict[str, Any]]:
-        return [_job_details_to_dict(j) for j in self.client.list_jobs()]
-
-
-def _job_details_to_dict(obj: Any) -> dict[str, Any]:
-    # Ray uses pydantic models internally, but depending on bundled pydantic version
-    # we might get `.model_dump()` (v2) or `.dict()` (v1).
-    if hasattr(obj, "model_dump"):
-        return obj.model_dump()  # type: ignore[no-any-return]
-    if hasattr(obj, "dict"):
-        return obj.dict()  # type: ignore[no-any-return]
-    if hasattr(obj, "__dict__"):
-        return dict(obj.__dict__)
-    return {"repr": repr(obj)}
diff --git a/src/mvp/v2.0/py/mvp_v11/yaml_io.py b/src/mvp/v2.0/py/mvp_v11/yaml_io.py
deleted file mode 100644
index c321688..0000000
--- a/src/mvp/v2.0/py/mvp_v11/yaml_io.py
+++ /dev/null
@@ -1,21 +0,0 @@
-from __future__ import annotations
-
-from pathlib import Path
-from typing import Any
-
-import yaml
-
-
-def load_yaml(path: str) -> dict[str, Any]:
-    p = Path(path)
-    data = yaml.safe_load(p.read_text(encoding="utf-8"))
-    if data is None:
-        return {}
-    if not isinstance(data, dict):
-        raise ValueError(f"yaml root must be a mapping: {path}")
-    return data
-
-
-def dump_yaml(data: dict[str, Any]) -> str:
-    return yaml.safe_dump(data, sort_keys=False, allow_unicode=True)
-
diff --git a/src/mvp/v2.0/scripts/12_install_v2_deps.sh b/src/mvp/v2.0/scripts/12_install_v2_deps.sh
deleted file mode 100755
index 38f3544..0000000
--- a/src/mvp/v2.0/scripts/12_install_v2_deps.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-
-# Install v2.0 API dependencies inside the head container (best-effort).
-# Assumes v1.1 containers are already up and v2.0 code is mounted/available.
-
-HEAD_CONTAINER="${HEAD_CONTAINER:-mvp11-ray-head}"
-
-docker exec -i "${HEAD_CONTAINER}" bash -lc "python3 -m pip install -U pip >/dev/null 2>&1 || true"
-docker exec -i "${HEAD_CONTAINER}" bash -lc "python3 -m pip install -r /workspace/mvp/v2/py/requirements.txt"
diff --git a/src/mvp/v2.0/scripts/20_start_api.sh b/src/mvp/v2.0/scripts/20_start_api.sh
deleted file mode 100755
index 81f328c..0000000
--- a/src/mvp/v2.0/scripts/20_start_api.sh
+++ /dev/null
@@ -1,28 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-# shellcheck source=lib.sh
-source "${SCRIPT_DIR}/lib.sh"
-
-CONFIG_IN_CONTAINER="${CONFIG_IN_CONTAINER:-/workspace/mvp/v1.1/py/configs/dev.yaml}"
-LOG_PATH="${LOG_PATH:-/private/common/logs/mvp_v2_api.log}"
-PID_PATH="${PID_PATH:-/private/common/run/mvp_v2_api.pid}"
-
-echo "[host] starting mvp v2 api in head container: ${HEAD_CONTAINER}"
-
-dexec bash -lc "mkdir -p \"$(dirname "${LOG_PATH}")\" \"$(dirname "${PID_PATH}")\""
-
-# Note: requires /workspace/mvp/v2.0/py to be present in the container (mounted or copied).
-# Escape $ so that the command substitution happens in the container, not on the host.
-dexec bash -lc "if test -f '${PID_PATH}'; then pid=\$(cat '${PID_PATH}'); if kill -0 \"\${pid}\" >/dev/null 2>&1; then echo 'already_running'; exit 0; fi; fi"
-
-if [[ -z "${MVP_INTERNAL_TOKEN:-}" ]]; then
-  echo "ERROR: MVP_INTERNAL_TOKEN env var must be set on host (will be passed into container)" >&2
-  exit 1
-fi
-
-docker exec -d -e MVP_INTERNAL_TOKEN="${MVP_INTERNAL_TOKEN}" "${HEAD_CONTAINER}" bash -lc "nohup python3 /workspace/mvp/v2/py/server.py --config '${CONFIG_IN_CONTAINER}' >>'${LOG_PATH}' 2>&1 & echo \$! >'${PID_PATH}'"
-
-echo "[host] started; pid stored in ${PID_PATH} (container path)"
-echo "[host] logs: ${LOG_PATH} (container path)"
diff --git a/src/mvp/v2.0/scripts/21_stop_api.sh b/src/mvp/v2.0/scripts/21_stop_api.sh
deleted file mode 100755
index 4d711ca..0000000
--- a/src/mvp/v2.0/scripts/21_stop_api.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-# shellcheck source=lib.sh
-source "${SCRIPT_DIR}/lib.sh"
-
-PID_PATH="${PID_PATH:-/private/common/run/mvp_v2_api.pid}"
-
-echo "[host] stopping mvp v2 api (pid file: ${PID_PATH})"
-
-dexec bash -lc "if ! test -f '${PID_PATH}'; then echo 'not_running'; exit 0; fi; pid=\"\$(cat '${PID_PATH}')\"; if kill -0 \"\${pid}\" >/dev/null 2>&1; then kill \"\${pid}\"; fi; rm -f '${PID_PATH}'; echo 'stopped'"
diff --git a/src/mvp/v2.0/scripts/22_status_api.sh b/src/mvp/v2.0/scripts/22_status_api.sh
deleted file mode 100755
index 0b3a8b6..0000000
--- a/src/mvp/v2.0/scripts/22_status_api.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-
-SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
-# shellcheck source=lib.sh
-source "${SCRIPT_DIR}/lib.sh"
-
-PID_PATH="${PID_PATH:-/private/common/run/mvp_v2_api.pid}"
-
-dexec bash -lc "if ! test -f '${PID_PATH}'; then echo 'not_running'; exit 0; fi; pid=\"\$(cat '${PID_PATH}')\"; if kill -0 \"\${pid}\" >/dev/null 2>&1; then echo \"running pid=\${pid}\"; else echo \"stale pid=\${pid}\"; fi"
diff --git a/src/mvp/v2.0/scripts/lib.sh b/src/mvp/v2.0/scripts/lib.sh
deleted file mode 100755
index 5f2c9bf..0000000
--- a/src/mvp/v2.0/scripts/lib.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/usr/bin/env bash
-set -euo pipefail
-
-# v2.0 scripts are intended to run on the host and control the existing Ray containers
-# (same topology as v1.1). Adjust container names via env vars if needed.
-
-HEAD_CONTAINER="${HEAD_CONTAINER:-mvp11-ray-head}"
-
-dexec() {
-  docker exec -i "${HEAD_CONTAINER}" "$@"
-}
-