diff --git a/docs/architecture/rfcs/typescript-control-plane-migration-v0.md b/docs/architecture/rfcs/typescript-control-plane-migration-v0.md
index 4ce9d885b3..3c98b80fc0 100644
--- a/docs/architecture/rfcs/typescript-control-plane-migration-v0.md
+++ b/docs/architecture/rfcs/typescript-control-plane-migration-v0.md
@@ -47,6 +47,15 @@ request-scope adoption separately rather than counting its gain again.
 
 ### Product conversations and asynchronous inbox
 
+**Chat HTTP POST scope.** `ChatRequestHandler.do_POST` now joins the existing
+executable-revision request scope for each complete HTTP dispatch. Session
+creation/resume and other POST routes reuse one code revision across their typed
+calls; the next request resolves current code again. Session, workspace grant,
+provider and authority observations remain live. Background Turn workers retain
+their own scope. This adds no bridge operation, semantic owner or state cache.
+Real HTTP and runtime regressions qualify source admission and revoked-grant
+refusal separately from installed behavior and real-model response latency.
+
 **Public quota read scope.** `quota/should_run.py` now reuses the existing
 executable-revision request scope for each complete public quota read. The
 compatibility facade and global views share that lifetime instead of resolving
diff --git a/docs/architecture/rfcs/typescript-control-plane-migration-v0.zh-CN.md b/docs/architecture/rfcs/typescript-control-plane-migration-v0.zh-CN.md
index 9a6fde824b..203a5aac5c 100644
--- a/docs/architecture/rfcs/typescript-control-plane-migration-v0.zh-CN.md
+++ b/docs/architecture/rfcs/typescript-control-plane-migration-v0.zh-CN.md
@@ -43,6 +43,13 @@ guard、格式和 typed owner。这不新增领域规则、桥接操作或数据
 
 ### 产品对话与通用异步 inbox
 
+**Chat HTTP POST 作用域。** `ChatRequestHandler.do_POST` 现在为每次完整 HTTP
+分发复用既有 executable-revision 请求作用域。Session 创建／恢复及其他 POST
+路由的 typed 调用共用一个代码版本；下一次请求重新解析当前代码。Session、工作区
+授权、provider 与 authority 仍实时读取。后台 Turn worker 保留自己的作用域。
+这不新增桥接操作、语义 owner 或状态缓存。真实 HTTP 与 runtime 回归分别验证
+源码准入和撤销授权后的拒绝；安装后行为与真实模型响应延迟仍需独立验证。
+
 **公共 quota 读取作用域。** `quota/should_run.py` 现在为每次完整公共 quota 读取
 复用既有 executable-revision 请求作用域。兼容 facade 和全局视图共用该生命周期，
 不再在每次 typed 判定前重新解析代码树。已有外层作用域仍可组合；下一次独立读取
diff --git a/loopx/chat_server.py b/loopx/chat_server.py
index 0c8bcf2983..78abf218e2 100644
--- a/loopx/chat_server.py
+++ b/loopx/chat_server.py
@@ -64,6 +64,7 @@
     project_chat_session_snapshot,
 )
 from .control_plane.goals.active_state_metadata import active_state_section_text
+from .control_plane.effect_runtime import effect_runtime_request_scope
 from .control_plane.coordination.local_authority import LocalCoordinationAuthorityUnavailable
 from .control_plane.status.ssh_host_catalog import (
     SSH_HOST_CATALOG_PATH,
@@ -1649,6 +1650,7 @@ def do_GET(self) -> None:
             return self._serve_asset(path)
         self._send_error("unknown path", status=404)
 
+    @effect_runtime_request_scope()
     def do_POST(self) -> None:
         if not self._require_loopback_origin():
             return
diff --git a/tests/test_chat_http_runtime_scope.py b/tests/test_chat_http_runtime_scope.py
new file mode 100644
index 0000000000..8e342df45a
--- /dev/null
+++ b/tests/test_chat_http_runtime_scope.py
@@ -0,0 +1,61 @@
+"""HTTP admission reuses code identity while grants and source reads stay fresh."""
+
+import os
+from pathlib import Path
+
+import pytest
+
+from test_chat_ordinary_project import ordinary  # noqa: F401
+from test_lark_private_conversations import connect
+from loopx.control_plane import effect_runtime
+
+
+@pytest.mark.parametrize("method", ["GET", "POST"])
+def test_http_reuses_code_scan_but_rereads_revoked_grants(ordinary, monkeypatch, method):  # noqa: F811
+    store, runtime, provider, transport = connect(ordinary)
+    _, _, contexts, request, capture, _, workspace = ordinary
+    binding = transport._binding("notes-app")
+    session, _ = runtime.open_session(
+        goal_id=None, agent_id="codex", work_dir=workspace, objective="",
+        mode="resume_latest", conversation_binding_id=binding["binding_id"],
+        source_context={"source_ref": "a" * 24, "sender_ref": binding["operator_ref"],
+                        "private_human_message": True},
+    )
+    path = "/api/chat/sessions"
+    body = None
+    if method == "GET":
+        path += "?conversation_binding_id=" + binding["binding_id"]
+    else:
+        body = {"context_kind": "project", "project_ref": contexts.available()[0]["project_ref"]}
+    # Warm the real source hash before counting filesystem traversals.
+    assert request(path, body)[0] in {200, 201}
+    source_root = Path(effect_runtime.__file__).parent
+    walk = os.walk
+    scans = []
+
+    def counted_walk(root, *args, **kwargs):
+        if Path(root) == source_root:
+            scans.append(root)
+        return walk(root, *args, **kwargs)
+
+    monkeypatch.setattr(os, "walk", counted_walk)
+    try:
+        for _ in range(2):
+            scans.clear()
+            status, payload = request(path, body)
+            assert status == 200, payload
+            if method == "GET":
+                assert [row["session_id"] for row in payload["sessions"]] == [session["session_id"]]
+            else:
+                assert payload["resumed"] is True
+                assert payload["session"]["project_ref"] == body["project_ref"]
+            # A new HTTP request scans again; its typed calls share that scan.
+            assert len(scans) == 1
+        before = store.list_sessions()
+        contexts.roots = []
+        status, _ = request(path, body)
+        assert status == (409 if method == "GET" else 400)
+        assert store.list_sessions() == before
+        assert '"method": "turn/start"' not in capture.read_text()
+    finally:
+        runtime.close()