diff --git a/README.md b/README.md
index ae1c990..2298d88 100644
--- a/README.md
+++ b/README.md
@@ -161,7 +161,7 @@ docker compose up --build
 # 打开 http://localhost:3018
 ```
 
-Docker 镜像内置固定版本的 **Codex CLI**，Compose 会将主机 `${HOME}/.codex` 只读挂载到容器，因此主机需先完成 Codex 登录。需要覆盖镜像内版本时可设置构建参数：
+Docker 镜像内置固定版本的 **Codex CLI**，Compose 会将主机 `${HOME}/.codex` 只读挂载到容器，因此主机需先完成 Codex 登录。若主机 Codex 使用 loopback local-access provider，容器会保留实际端口并自动将主机名映射为 `host.docker.internal`。需要覆盖镜像内版本时可设置构建参数：
 
 ```bash
 CODEX_CLI_VERSION=0.144.3 docker compose up --build
diff --git a/backend/app/services/ai_provider.py b/backend/app/services/ai_provider.py
index 8df8f0c..2886520 100644
--- a/backend/app/services/ai_provider.py
+++ b/backend/app/services/ai_provider.py
@@ -14,6 +14,7 @@ import tomllib
 from collections.abc import AsyncIterator, Callable, Sequence
 from pathlib import Path
 from types import TracebackType
+from urllib.parse import urlsplit, urlunsplit
 
 from app import secrets_store
 from app.config import settings
@@ -699,6 +700,10 @@ def _codex_home() -> Path:
 def _write_compatible_codex_config(path: Path) -> None:
     config = _read_codex_config()
     lines: list[str] = []
+    local_provider = _docker_codex_local_provider(config)
+
+    if local_provider:
+        lines.append(_toml_string("model_provider", "codex_local_access"))
 
     model = current_ai_model() or normalize_codex_model(str(config.get("model") or ""))
     if model:
@@ -713,9 +718,43 @@ def _write_compatible_codex_config(path: Path) -> None:
     lines.append(_toml_string("approval_policy", "never"))
     lines.append(_toml_string("sandbox_mode", "read-only"))
 
+    if local_provider:
+        lines.append("")
+        lines.append("[model_providers.codex_local_access]")
+        for key in ("name", "base_url", "wire_api", "experimental_bearer_token"):
+            value = local_provider.get(key)
+            if isinstance(value, str) and value:
+                lines.append(_toml_string(key, value))
+        for key in ("requires_openai_auth", "supports_websockets"):
+            value = local_provider.get(key)
+            if isinstance(value, bool):
+                lines.append(f"{key} = {'true' if value else 'false'}")
+
     path.write_text("\n".join(lines) + "\n", encoding="utf-8")
 
 
+def _docker_codex_local_provider(config: dict) -> dict | None:
+    """Return the local-access provider adapted to Docker's host gateway."""
+    docker_host = os.environ.get("CODEX_DOCKER_HOST", "").strip()
+    if not docker_host or config.get("model_provider") != "codex_local_access":
+        return None
+
+    providers = config.get("model_providers")
+    if not isinstance(providers, dict):
+        return None
+    source = providers.get("codex_local_access")
+    if not isinstance(source, dict):
+        return None
+
+    provider = dict(source)
+    base_url = str(provider.get("base_url") or "").strip()
+    parsed = urlsplit(base_url)
+    if parsed.hostname in {"localhost", "127.0.0.1", "::1"}:
+        port = f":{parsed.port}" if parsed.port else ""
+        provider["base_url"] = urlunsplit(parsed._replace(netloc=f"{docker_host}{port}"))
+    return provider
+
+
 def _read_codex_config() -> dict:
     path = _codex_home() / "config.toml"
     if not path.exists():
diff --git a/backend/tests/test_ai_provider.py b/backend/tests/test_ai_provider.py
index 5ff5c05..1b5a89c 100644
--- a/backend/tests/test_ai_provider.py
+++ b/backend/tests/test_ai_provider.py
@@ -1,5 +1,7 @@
 from __future__ import annotations
 
+import tomllib
+
 import httpx
 import openai
 
@@ -161,3 +163,66 @@ def test_codex_process_env_excludes_application_secrets(monkeypatch, tmp_path):
     assert "AI_API_KEY" not in env
     assert "OPENAI_API_KEY" not in env
     assert "AUTH_PASSWORD" not in env
+
+
+def test_codex_config_adapts_local_access_provider_for_docker(monkeypatch, tmp_path):
+    monkeypatch.setenv("CODEX_DOCKER_HOST", "host.docker.internal")
+    monkeypatch.setattr(ai_provider, "current_ai_model", lambda: "")
+    monkeypatch.setattr(ai_provider, "current_codex_reasoning_effort", lambda: "")
+    monkeypatch.setattr(
+        ai_provider,
+        "_read_codex_config",
+        lambda: {
+            "model_provider": "codex_local_access",
+            "model": "gpt-5.6-sol",
+            "model_providers": {
+                "codex_local_access": {
+                    "name": "Codex API Service",
+                    "base_url": "http://localhost:62678/v1",
+                    "wire_api": "responses",
+                    "requires_openai_auth": True,
+                    "supports_websockets": False,
+                    "experimental_bearer_token": "local-secret",
+                }
+            },
+        },
+    )
+    path = tmp_path / "config.toml"
+
+    ai_provider._write_compatible_codex_config(path)
+
+    with path.open("rb") as f:
+        config = tomllib.load(f)
+    assert config["model_provider"] == "codex_local_access"
+    provider = config["model_providers"]["codex_local_access"]
+    assert provider["base_url"] == "http://host.docker.internal:62678/v1"
+    assert provider["experimental_bearer_token"] == "local-secret"
+    assert provider["requires_openai_auth"] is True
+    assert provider["supports_websockets"] is False
+
+
+def test_codex_config_does_not_copy_provider_without_docker_opt_in(monkeypatch, tmp_path):
+    monkeypatch.delenv("CODEX_DOCKER_HOST", raising=False)
+    monkeypatch.setattr(ai_provider, "current_ai_model", lambda: "")
+    monkeypatch.setattr(ai_provider, "current_codex_reasoning_effort", lambda: "")
+    monkeypatch.setattr(
+        ai_provider,
+        "_read_codex_config",
+        lambda: {
+            "model_provider": "codex_local_access",
+            "model_providers": {
+                "codex_local_access": {
+                    "base_url": "http://localhost:62678/v1",
+                    "experimental_bearer_token": "must-not-leak",
+                }
+            },
+        },
+    )
+    path = tmp_path / "config.toml"
+
+    ai_provider._write_compatible_codex_config(path)
+
+    text = path.read_text(encoding="utf-8")
+    assert "model_provider" not in text
+    assert "model_providers" not in text
+    assert "must-not-leak" not in text
diff --git a/docker-compose.yml b/docker-compose.yml
index aa3d9eb..d32c8c7 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -19,6 +19,8 @@ services:
       # 导致每次 up --build 重建容器都丢数据。environment 优先级高于 env_file,
       # 无论 .env 怎么写这里都以容器路径为准。
       - DATA_DIR=/app/data
+      # 将主机 Codex Desktop 的 loopback local-access 端点映射到 Docker host gateway。
+      - CODEX_DOCKER_HOST=host.docker.internal
     volumes:
       - ./data:/app/data
       - ./tiers.yaml:/app/tiers.yaml:ro
diff --git a/docs/superpowers/plans/2026-07-14-docker-codex-cli.md b/docs/superpowers/plans/2026-07-14-docker-codex-cli.md
index 544d12f..2eb2267 100644
--- a/docs/superpowers/plans/2026-07-14-docker-codex-cli.md
+++ b/docs/superpowers/plans/2026-07-14-docker-codex-cli.md
@@ -37,6 +37,7 @@
 
 - [x] Pass `CODEX_CLI_VERSION` through Compose.
 - [x] Mount `${HOME}/.codex:/root/.codex:ro`.
+- [x] Set `CODEX_DOCKER_HOST=host.docker.internal` for loopback local-access providers.
 - [x] Run `docker compose config` and confirm the version and read-only mount.
 
 ### Task 4: Document behavior
@@ -55,9 +56,10 @@
 
 - [x] Build the Codex builder stage and verify `codex-cli 0.144.3`.
 - [x] Copy the extracted binary into the current TickFlow runtime image and verify it executes without Node.js.
-- [ ] Recreate the app with the Codex-enabled image and existing data.
-- [ ] Verify `/api/settings` reports Codex configured.
-- [ ] POST `/api/strategies/ai/test` and expect `{"ok":true}` with `OK`.
+- [x] Add red/green tests for opt-in local-access provider mapping and default token isolation.
+- [x] Recreate the app with the Codex-enabled image and existing data.
+- [x] Verify `/api/settings` reports Codex configured.
+- [x] POST `/api/strategies/ai/test` and receive `{"ok":true}` with `OK`.
 - [ ] Re-run provider tests and inspect final Git/GitNexus scope.
 - [ ] Push `codex/docker-codex-cli` and open a Draft PR against `main`.
 
diff --git a/docs/superpowers/specs/2026-07-14-docker-codex-cli-design.md b/docs/superpowers/specs/2026-07-14-docker-codex-cli-design.md
index c7e8099..569d979 100644
--- a/docs/superpowers/specs/2026-07-14-docker-codex-cli-design.md
+++ b/docs/superpowers/specs/2026-07-14-docker-codex-cli-design.md
@@ -32,6 +32,8 @@ Dockerfile 新增独立的 `codex-builder` 阶段，使用 Node bookworm 镜像
 
 后端现有 `_prepare_codex_home` 会从只读挂载中读取 `auth.json` 和兼容配置，再复制或生成到单次请求的临时 `CODEX_HOME`。Codex 子进程只使用临时目录，因此不会修改主机凭据目录。
 
+当主机配置明确选择 `codex_local_access` 时，Compose 通过 `CODEX_DOCKER_HOST=host.docker.internal` 启用受控适配：临时配置只复制该 provider 的必要白名单字段，将 `localhost`、`127.0.0.1` 或 `::1` 改为 Docker host gateway，并保留原端口。未设置该环境变量时继续使用原有隔离配置，不复制 provider 或 bearer token。
+
 ### 数据流
 
 1. Compose 启动容器并只读挂载主机 Codex home。
@@ -52,6 +54,7 @@ Dockerfile 新增独立的 `codex-builder` 阶段，使用 Node bookworm 镜像
 
 - Codex home 仅以只读方式挂载。
 - 凭据不进入 Docker build context 的产物层。
+- local-access bearer token 仅从只读主机配置复制到单次请求的临时配置，且只在 Docker 显式启用适配时发生。
 - 现有 `--ephemeral`、`--sandbox read-only`、`approval_policy = "never"` 和空白临时工作区保持不变。
 - 文档明确说明：启用 Docker Codex 模式意味着 TickFlow 容器能够读取 Codex 登录凭据，应仅在受信任的本机环境使用。