diff --git a/AGENTS.md b/AGENTS.md
index 0ae3ba1..82e7a1d 100644
--- a/AGENTS.md
+++ b/AGENTS.md
@@ -13,7 +13,7 @@
    - 验收范围：`docs/12-验收与迭代规划.md`
 2. 检查 `git status`，保留用户已有改动；不要顺手格式化、重写或删除无关文件。
 3. 区分三类内容：
-   - `frontend/platform_admin`、`backend/{api,worker,iot-client,iot-server}` 是当前业务实现。
+   - `frontend/platform_admin`、`backend/{api,worker,iot-gateway,iot-server}` 是当前业务实现。
    - `docs/10-技术实现规划.md` 中尚不存在的目录和系统属于规划，不得为完成局部任务擅自创建空壳工程。
 4. 需求不明确时以文档中的系统主责、数据主责和安全规则为边界；不得把标为“待确认”的事项自行固化为政策。
 5. 文档之间出现冲突时按以下顺序处理：
@@ -29,7 +29,7 @@
 
 - `backend/api`：Gin HTTP API/BFF、鉴权、同步业务事务、数据库事实和审计。
 - `backend/worker`：Outbox 投递、Redis Streams 消费、告警、派单、通知、对账和超时任务。当前主要是 Mock 边界，未确定持久化消息契约前不要伪造完整实现。
-- `backend/iot-client`：管理系统/App 的设备上下行 HTTP 边界；不得绕过 API 的业务鉴权和安全状态校验。
+- `backend/iot-gateway`：API/Worker 与 IoT Server 的无状态上下行 HTTP 轻网关；不得保存业务事实或绕过 API 的业务鉴权和安全状态校验。
 - `backend/iot-server`：内嵌 Mochi MQTT Broker、厂商协议、遥测、设备命令和回执；本地配置不代表已完成真实设备联调。
 - `frontend/platform_admin`：平台级治理、运营、财务、安全、主数据和审计界面；后端资源契约是其资源和操作能力的依据。
 - `docs`：产品和技术基线；涉及业务口径、实体、状态、权限或跨端流程的变更必须同步更新相应文档。
@@ -60,7 +60,7 @@ platforms/
   backend/
     api/                        # 当前：同步 HTTP API/BFF
     worker/                     # 当前：异步任务和事件消费
-    iot-client/                 # 当前：管理系统/App 的设备上下行接口
+    iot-gateway/                # 当前：API/Worker 与 IoT Server 的无状态上下行网关
     iot-server/                 # 当前：MQTT 与设备协议边界
   contracts/
     openapi/                    # 规划：HTTP 契约
@@ -147,7 +147,7 @@ go build ./cmd/main/main.go
 
 # Worker / IoT（改动对应模块时）
 cd backend/worker && go test ./... && go build ./cmd/main/main.go
-cd backend/iot-client && go test ./... && go build ./cmd/main/main.go
+cd backend/iot-gateway && go test ./... && go build ./cmd/main/main.go
 cd backend/iot-server && go test ./... && go build ./cmd/main/main.go
 
 # 平台总后台
diff --git a/backend/README.md b/backend/README.md
index a96bdd3..c5d147a 100644
--- a/backend/README.md
+++ b/backend/README.md
@@ -6,7 +6,7 @@
 | --- | --- |
 | `api` | Gin HTTP API / BFF、同步事务、JWT 鉴权与统一响应 |
 | `worker` | Outbox 投递、超时扫描与可重试异步任务 |
-| `iot-client` | 管理系统/App 的设备上下行 HTTP 边界、幂等受理与状态查询 |
+| `iot-gateway` | API/Worker 与 IoT Server 之间的无状态上下行 HTTP 轻网关 |
 | `iot-server` | 内嵌 Mochi MQTT Broker、厂商二进制协议、遥测、命令与回执 |
 
 四个进程沿用统一的工程机制；API 是命令、Outbox 和上行报文的数据库事实主责，Worker 负责投递，IoT Client 负责系统接口，IoT Server 负责设备协议。
diff --git a/backend/api/etc/heqi_dev.yaml b/backend/api/etc/heqi_dev.yaml
index ccb20e2..6fe6ec4 100644
--- a/backend/api/etc/heqi_dev.yaml
+++ b/backend/api/etc/heqi_dev.yaml
@@ -50,4 +50,3 @@ Payment:
 
 IoT:
   InternalServiceToken: change-me-iot-internal-token
-  ClientBaseURL: http://127.0.0.1:12429
diff --git a/backend/api/internal/config/config.go b/backend/api/internal/config/config.go
index 1312244..c529839 100644
--- a/backend/api/internal/config/config.go
+++ b/backend/api/internal/config/config.go
@@ -66,10 +66,9 @@ type PaymentConfig struct {
 	Wechat               WechatPayConfig `yaml:"Wechat"`
 }
 
-// IoTConfig 保存 API、Worker 与 IoT Client 间的内部认证和地址。
+// IoTConfig 保存 API 与 IoT 链路间的内部认证配置。
 type IoTConfig struct {
 	InternalServiceToken string `yaml:"InternalServiceToken"`
-	ClientBaseURL        string `yaml:"ClientBaseURL"`
 }
 
 // SrvConfig 与仓库现有进程的配置结构保持一致。
@@ -110,8 +109,8 @@ func New(srvKey string) {
 	if Spec.Payment.ExpireMinutes <= 0 || Spec.Payment.RefundWindowDays <= 0 {
 		panic("Payment expiration and refund window must be greater than zero")
 	}
-	if len(strings.TrimSpace(Spec.IoT.InternalServiceToken)) < 16 || !strings.HasPrefix(Spec.IoT.ClientBaseURL, "http") {
-		panic("IoT internal token and client base URL are required")
+	if len(strings.TrimSpace(Spec.IoT.InternalServiceToken)) < 16 {
+		panic("IoT internal token is required")
 	}
 	registerURL, err := url.ParseRequestURI(Spec.Global.UserRegisterURL)
 	if err != nil || (registerURL.Scheme != "http" && registerURL.Scheme != "https") || registerURL.Host == "" {
diff --git a/backend/go.work b/backend/go.work
index 6e604f8..a1c7668 100644
--- a/backend/go.work
+++ b/backend/go.work
@@ -3,6 +3,6 @@ go 1.26.1
 use (
   ./api
   ./worker
-  ./iot-client
+  ./iot-gateway
   ./iot-server
 )
diff --git a/backend/go.work.sum b/backend/go.work.sum
index 5d31711..2c304e3 100644
--- a/backend/go.work.sum
+++ b/backend/go.work.sum
@@ -2,15 +2,26 @@ cel.dev/expr v0.25.1 h1:1KrZg61W6TWSxuNZ37Xy49ps13NUovb66QLprthtwi4=
 cel.dev/expr v0.25.1/go.mod h1:hrXvqGP6G6gyx8UAHSHJ5RGk//1Oj5nXQ2NI02Nrsg4=
 cloud.google.com/go/compute/metadata v0.9.0 h1:pDUj4QMoPejqq20dK0Pg2N4yG9zIkYGdBtwLoEkH9Zs=
 cloud.google.com/go/compute/metadata v0.9.0/go.mod h1:E0bWwX5wTnLPedCKqk3pJmVgCBSM6qQI1yTBdEb3C10=
+github.com/DataDog/zstd v1.4.5/go.mod h1:1jcaCB/ufaK+sKp1NBhlGmpz41jOoPQ35bpF36t7BBo=
 github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.31.0 h1:DHa2U07rk8syqvCge0QIGMCE1WxGj9njT44GH7zNJLQ=
 github.com/GoogleCloudPlatform/opentelemetry-operations-go/detectors/gcp v1.31.0/go.mod h1:P4WPRUkOhJC13W//jWpyfJNDAIpvRbAUIYLX/4jtlE0=
 github.com/agiledragon/gomonkey v2.0.2+incompatible h1:eXKi9/piiC3cjJD1658mEE2o3NjkJ5vDLgYjCQu0Xlw=
+github.com/alicebob/gopher-json v0.0.0-20200520072559-a9ecdc9d1d3a/go.mod h1:SGnFV6hVsYE877CKEZ6tDNTjaSXYUk6QqoIK6PrAtcc=
+github.com/alicebob/miniredis/v2 v2.23.0/go.mod h1:XNqvJdQJv5mSuVMc0ynneafpnL/zv52acZ6kqeS0t88=
 github.com/antihax/optional v1.0.0 h1:xK2lYat7ZLaVVcIuj82J8kIro4V6kDe0AUDFboUCwcg=
 github.com/antihax/optional v1.0.0/go.mod h1:uupD/76wgC+ih3iEmQUL+0Ugr19nfwCT1kdvxnR2qWY=
 github.com/beorn7/perks v1.0.1 h1:VlbKKnNfV8bJzeqoa4cOKqO6bYr3WgKZxO8Z16+hsOM=
 github.com/beorn7/perks v1.0.1/go.mod h1:G2ZrVWU2WbWT9wwq4/hrbKbnv/1ERSJQ0ibhJ6rlkpw=
 github.com/cncf/xds/go v0.0.0-20260202195803-dba9d589def2 h1:aBangftG7EVZoUb69Os8IaYg++6uMOdKK83QtkkvJik=
 github.com/cncf/xds/go v0.0.0-20260202195803-dba9d589def2/go.mod h1:qwXFYgsP6T7XnJtbKlf1HP8AjxZZyzxMmc+Lq5GjlU4=
+github.com/cockroachdb/errors v1.11.1/go.mod h1:8MUxA3Gi6b25tYlFEBGLf+D8aISL+M4MIpiWMSNRfxw=
+github.com/cockroachdb/logtags v0.0.0-20230118201751-21c54148d20b/go.mod h1:Vz9DsVWQQhf3vs21MhPMZpMGSht7O/2vFW2xusFUVOs=
+github.com/cockroachdb/pebble v1.1.0/go.mod h1:sEHm5NOXxyiAoKWhoFxT8xMgd/f3RA6qUqQ1BXKrh2E=
+github.com/cockroachdb/redact v1.1.5/go.mod h1:BVNblN9mBWFyMyqK1k3AAiSxhvhfK2oOZZ2lK+dpvRg=
+github.com/cockroachdb/tokenbucket v0.0.0-20230807174530-cc333fc44b06/go.mod h1:7nc4anLGjupUW/PeY5qiNYsdNXj7zopG+eqsS7To5IQ=
+github.com/dgraph-io/badger/v4 v4.2.0/go.mod h1:qfCqhPoWDFJRx1gp5QwwyGo8xk1lbHUxvK9nK0OGAak=
+github.com/dgraph-io/ristretto v0.1.1/go.mod h1:S1GPSBCYCIhmVNfcth17y2zZtQT6wzkzgwUve0VDWWA=
+github.com/dgryski/go-rendezvous v0.0.0-20200823014737-9f7001d12a5f/go.mod h1:cuUVRXasLTGF7a8hSLbxyZXjz+1KgoB3wDUb6vlszIc=
 github.com/dustin/go-humanize v1.0.1 h1:GzkhY7T5VNhEkwH0PVJgjz+fX1rhBrR7pRT3mDkpeCY=
 github.com/dustin/go-humanize v1.0.1/go.mod h1:Mu1zIs6XwVuF/gI1OepvI0qD18qycQx+mFykh5fBlto=
 github.com/elastic/elastic-transport-go/v8 v8.9.0 h1:KeT/2P54F0xS0S8Y3Pf+tFDg4HmBgReQMB+BMz8dDAs=
@@ -25,18 +36,24 @@ github.com/envoyproxy/go-control-plane/ratelimit v0.1.0 h1:/G9QYbddjL25KvtKTv3an
 github.com/envoyproxy/go-control-plane/ratelimit v0.1.0/go.mod h1:Wk+tMFAFbCXaJPzVVHnPgRKdUdwW/KdbRt94AzgRee4=
 github.com/envoyproxy/protoc-gen-validate v1.3.3 h1:MVQghNeW+LZcmXe7SY1V36Z+WFMDjpqGAGacLe2T0ds=
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+github.com/getsentry/sentry-go v0.18.0/go.mod h1:Kgon4Mby+FJ7ZWHFUAZgVaIa8sxHtnRJRLTXZr51aKQ=
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+github.com/go-redis/redis/v8 v8.11.5/go.mod h1:gREzHqY1hg6oD9ngVRbLStwAWKhA0FEgq8Jd4h5lpwo=
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 github.com/grpc-ecosystem/go-grpc-middleware/providers/prometheus v1.0.1/go.mod h1:lXGCsh6c22WGtjr+qGHj1otzZpV/1kwTMAqkwZsnWRU=
 github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.1.0 h1:pRhl55Yx1eC7BZ1N+BBWwnKaMyD8uC+34TLdndZMAKk=
 github.com/grpc-ecosystem/go-grpc-middleware/v2 v2.1.0/go.mod h1:XKMd7iuf/RGPSMJ/U4HP0zS2Z9Fh8Ps9a+6X26m/tmI=
+github.com/jinzhu/copier v0.3.5/go.mod h1:DfbEm0FYsaqBcKcFuvmOZb218JkPGtvSHsKg8S8hyyg=
 github.com/jordanlewis/gcassert v0.0.0-20250430164644-389ef753e22e h1:a+PGEeXb+exwBS3NboqXHyxarD9kaboBbrSp+7GuBuc=
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 github.com/kisielk/errcheck v1.5.0 h1:e8esj/e4R+SAOwFwN+n3zr0nYeCyeweozKfO23MvHzY=
@@ -46,6 +63,7 @@ github.com/klauspost/compress v1.18.5 h1:/h1gH5Ce+VWNLSWqPzOVn6XBO+vJbCNGvjoaGBF
 github.com/klauspost/compress v1.18.5/go.mod h1:cwPg85FWrGar70rWktvGQj8/hthj3wpl0PGDogxkrSQ=
 github.com/mattn/go-sqlite3 v1.14.22 h1:2gZY6PC6kBnID23Tichd1K+Z0oS6nE/XwU+Vz/5o4kU=
 github.com/mattn/go-sqlite3 v1.14.22/go.mod h1:Uh1q+B4BYcTPb+yiD3kU8Ct7aC0hY9fxUwlHK0RXw+Y=
+github.com/matttproud/golang_protobuf_extensions v1.0.2-0.20181231171920-c182affec369/go.mod h1:BSXmuO+STAnVfrANrmjBb36TMTDstsz7MSK+HVaYKv4=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 h1:C3w9PqII01/Oq1c1nUAm88MOHcQC9l5mIlSMApZMrHA=
 github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822/go.mod h1:+n7T8mK8HuQTcFwEeznm/DIxMOiR9yIdICNftLE1DvQ=
 github.com/nats-io/nats.go v1.52.0 h1:n3avV4VBsCgsdwh71TppsTwtv+QdPs7ntSKM8qJLGsc=
@@ -55,6 +73,7 @@ github.com/nats-io/nkeys v0.4.15/go.mod h1:CpMchTXC9fxA5zrMo4KpySxNjiDVvr8ANOSZd
 github.com/nats-io/nuid v1.0.1 h1:5iA8DT8V7q8WK2EScv2padNa/rTESc1KdnPw4TC2paw=
 github.com/nats-io/nuid v1.0.1/go.mod h1:19wcPz3Ph3q0Jbyiqsd0kePYG7A95tJPxeL+1OSON2c=
 github.com/pborman/getopt v0.0.0-20170112200414-7148bc3a4c30 h1:BHT1/DKsYDGkUgQ2jmMaozVcdk+sVfz0+1ZJq4zkWgw=
+github.com/pkg/errors v0.9.1/go.mod h1:bwawxfHBFNV+L2hUp1rHADufV3IMtnDRdf1r5NINEl0=
 github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10 h1:GFCKgmp0tecUJ0sJuv4pzYCqS9+RGSn52M3FUwPs+uo=
 github.com/planetscale/vtprotobuf v0.6.1-0.20240319094008-0393e58bdf10/go.mod h1:t/avpk3KcrXxUnYOhZhMXJlSEyie6gQbtLq5NM3loB8=
 github.com/prometheus/client_golang v1.20.5 h1:cxppBPuYhUnsO6yo/aoRol4L7q7UFfdm+bR9r+8l63Y=
@@ -67,8 +86,6 @@ github.com/prometheus/procfs v0.15.1 h1:YagwOFzUgYfKKHX6Dr+sHT7km/hxC76UB0leargg
 github.com/prometheus/procfs v0.15.1/go.mod h1:fB45yRUv8NstnjriLhBQLuOUt+WW4BsoGhij/e3PBqk=
 github.com/rogpeppe/fastuuid v1.2.0 h1:Ppwyp6VYCF1nvBTXL3trRso7mXMlRrw9ooo375wvi2s=
 github.com/rogpeppe/fastuuid v1.2.0/go.mod h1:jVj6XXZzXRy/MSR5jhDC/2q6DgLz+nrA6LYCDYWNEvQ=
-github.com/rs/xid v1.4.0 h1:qd7wPTDkN6KQx2VmMBLrpHkiyQwgFXRnkOLacUiaSNY=
-github.com/rs/xid v1.4.0/go.mod h1:trrq9SKmegXys3aeAKXMUTdJsYXVwGY3RLcfgqegfbg=
 github.com/shirou/gopsutil v3.21.11+incompatible h1:+1+c1VGhc88SSonWP6foOcLhvnKlUeu/erjjvaPEYiI=
 github.com/shirou/gopsutil v3.21.11+incompatible/go.mod h1:5b4v6he4MtMOwMlS0TUMTu2PcXUg8+E1lC7eC3UO/RA=
 github.com/spiffe/go-spiffe/v2 v2.6.0 h1:l+DolpxNWYgruGQVV0xsfeya3CsC7m8iBzDnMpsbLuo=
@@ -87,12 +104,16 @@ github.com/xdg-go/stringprep v1.0.4/go.mod h1:mPGuuIYwz7CmR2bT9j4GbQqutWS1zV24gi
 github.com/youmark/pkcs8 v0.0.0-20240726163527-a2c0da244d78 h1:ilQV1hzziu+LLM3zUTJ0trRztfwgjqKnBWNtSRkbmwM=
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+github.com/yuin/gopher-lua v0.0.0-20210529063254-f4c35e4016d9/go.mod h1:E1AXubJBdNmFERAOucpDIxNzeGfLzg0mYh+UfMWdChA=
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+go.etcd.io/bbolt v1.3.5/go.mod h1:G5EMThwa9y8QZGBClrRx5EY+Yw9kAhnjy3bSjsnlVTQ=
+go.opencensus.io v0.22.5/go.mod h1:5pWMHQbX5EPX2/62yrJeAkowc+lfs/XD7Uxpq3pI6kk=
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+golang.org/x/exp v0.0.0-20230626212559-97b1e661b5df/go.mod h1:FXUEEKJgO7OQYeo8N01OfiKP8RXMtf6e8aTskBGqWdc=
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 golang.org/x/mod v0.34.0/go.mod h1:ykgH52iCZe79kzLLMhyCUzhMci+nQj+0XkbXpNYtVjY=
 golang.org/x/oauth2 v0.36.0 h1:peZ/1z27fi9hUOFCAZaHyrpWG5lwe0RJEEEeH0ThlIs=
diff --git a/backend/iot-client/README.md b/backend/iot-client/README.md
deleted file mode 100644
index 1e9bfdb..0000000
--- a/backend/iot-client/README.md
+++ /dev/null
@@ -1,5 +0,0 @@
-# IoT Client
-
-管理系统与 App 的上下行设备接口边界。外部业务请求应先经过 Platform API 的 JWT、角色、对象归属和安全状态校验；API/Worker 使用内部令牌调用本服务。命令要求 `identity`、`idempotency_key`、过期时间，并返回可查询状态，不能把 HTTP 受理视为设备执行成功。
-
-设备上行报文由 IoT Server 回调本服务，再转交 Platform API 持久化和审计。
diff --git a/backend/iot-client/go.mod b/backend/iot-client/go.mod
deleted file mode 100644
index bd440ab..0000000
--- a/backend/iot-client/go.mod
+++ /dev/null
@@ -1,5 +0,0 @@
-module git.apinb.com/heqiapp/platforms/backend/iot-client
-
-go 1.26.1
-
-require gopkg.in/yaml.v3 v3.0.1
diff --git a/backend/iot-gateway/README.md b/backend/iot-gateway/README.md
new file mode 100644
index 0000000..81b853d
--- /dev/null
+++ b/backend/iot-gateway/README.md
@@ -0,0 +1,5 @@
+# IoT Gateway
+
+API/Worker 与 IoT Server 之间的无状态轻网关。外部业务请求必须先经过 Platform API 的 JWT、角色、对象归属和安全状态校验；Worker 使用内部令牌经本服务下发命令。网关不保存命令、幂等或设备事实，只透传 `identity`、`idempotency_key` 和过期时间，并返回 IoT Server 的派发结果。
+
+设备上行报文由 IoT Server 回调本服务，再转交 Platform API 持久化和审计；命令与幂等事实、最终状态查询统一由 API/PostgreSQL 提供。
diff --git a/backend/iot-client/cmd/main/main.go b/backend/iot-gateway/cmd/main/main.go
similarity index 60%
rename from backend/iot-client/cmd/main/main.go
rename to backend/iot-gateway/cmd/main/main.go
index ed77a0a..497ea0e 100644
--- a/backend/iot-client/cmd/main/main.go
+++ b/backend/iot-gateway/cmd/main/main.go
@@ -3,15 +3,15 @@ package main
 import (
 	"context"
 	"flag"
-	"git.apinb.com/heqiapp/platforms/backend/iot-client/internal/config"
-	"git.apinb.com/heqiapp/platforms/backend/iot-client/internal/service"
+	"git.apinb.com/heqiapp/platforms/backend/iot-gateway/internal/config"
+	"git.apinb.com/heqiapp/platforms/backend/iot-gateway/internal/service"
 	"log"
 	"os/signal"
 	"syscall"
 )
 
 func main() {
-	path := flag.String("config", "etc/platform_iot_client_dev.yaml", "YAML 配置文件")
+	path := flag.String("config", "etc/platform_iot_gateway_dev.yaml", "YAML 配置文件")
 	flag.Parse()
 	cfg, err := config.Load(*path)
 	if err != nil {
diff --git a/backend/iot-client/etc/platform_iot_client_dev.yaml b/backend/iot-gateway/etc/platform_iot_gateway_dev.yaml
similarity index 87%
rename from backend/iot-client/etc/platform_iot_client_dev.yaml
rename to backend/iot-gateway/etc/platform_iot_gateway_dev.yaml
index fc4f838..9661649 100644
--- a/backend/iot-client/etc/platform_iot_client_dev.yaml
+++ b/backend/iot-gateway/etc/platform_iot_gateway_dev.yaml
@@ -1,4 +1,4 @@
-Service: platform-iot-client
+Service: platform-iot-gateway
 HTTP:
   Address: 127.0.0.1:12429
   InternalToken: change-me-iot-internal-token
diff --git a/backend/iot-gateway/go.mod b/backend/iot-gateway/go.mod
new file mode 100644
index 0000000..3ba3510
--- /dev/null
+++ b/backend/iot-gateway/go.mod
@@ -0,0 +1,5 @@
+module git.apinb.com/heqiapp/platforms/backend/iot-gateway
+
+go 1.26.1
+
+require gopkg.in/yaml.v3 v3.0.1
diff --git a/backend/iot-client/go.sum b/backend/iot-gateway/go.sum
similarity index 100%
rename from backend/iot-client/go.sum
rename to backend/iot-gateway/go.sum
diff --git a/backend/iot-client/internal/config/config.go b/backend/iot-gateway/internal/config/config.go
similarity index 100%
rename from backend/iot-client/internal/config/config.go
rename to backend/iot-gateway/internal/config/config.go
diff --git a/backend/iot-client/internal/service/service.go b/backend/iot-gateway/internal/service/service.go
similarity index 72%
rename from backend/iot-client/internal/service/service.go
rename to backend/iot-gateway/internal/service/service.go
index b1e30ec..e12cbcf 100644
--- a/backend/iot-client/internal/service/service.go
+++ b/backend/iot-gateway/internal/service/service.go
@@ -9,20 +9,15 @@ import (
 	"fmt"
 	"io"
 	"net/http"
-	"strings"
-	"sync"
 	"time"
 
-	"git.apinb.com/heqiapp/platforms/backend/iot-client/internal/config"
+	"git.apinb.com/heqiapp/platforms/backend/iot-gateway/internal/config"
 )
 
 type Service struct {
-	cfg           config.Config
-	client        *http.Client
-	mu            sync.RWMutex
-	byIdentity    map[string]Command
-	byIdempotency map[string]string
-	http          *http.Server
+	cfg    config.Config
+	client *http.Client
+	http   *http.Server
 }
 type Command struct {
 	Identity       string    `json:"identity"`
@@ -37,11 +32,6 @@ type Command struct {
 	Controller     byte      `json:"controller"`
 	Loop           byte      `json:"loop"`
 	Component      byte      `json:"component"`
-	Status         string    `json:"status"`
-	PacketNumber   uint16    `json:"packet_number,omitempty"`
-	ErrorCode      string    `json:"error_code,omitempty"`
-	CreatedAt      time.Time `json:"created_at"`
-	UpdatedAt      time.Time `json:"updated_at"`
 }
 type deviceEnvelope struct {
 	Type, Topic, DeviceID, ReceivedAt, PayloadHex string
@@ -49,13 +39,12 @@ type deviceEnvelope struct {
 }
 
 func New(cfg config.Config) *Service {
-	return &Service{cfg: cfg, client: &http.Client{Timeout: 12 * time.Second}, byIdentity: map[string]Command{}, byIdempotency: map[string]string{}}
+	return &Service{cfg: cfg, client: &http.Client{Timeout: 12 * time.Second}}
 }
 func (s *Service) Run(ctx context.Context) error {
 	mux := http.NewServeMux()
 	mux.HandleFunc("/health", func(w http.ResponseWriter, _ *http.Request) { w.WriteHeader(http.StatusNoContent) })
 	mux.HandleFunc("/v1/device-commands", s.commands)
-	mux.HandleFunc("/v1/device-commands/", s.commandStatus)
 	mux.HandleFunc("/internal/v1/device-messages", s.deviceMessage)
 	s.http = &http.Server{Addr: s.cfg.HTTP.Address, Handler: mux, ReadHeaderTimeout: 5 * time.Second}
 	go func() {
@@ -95,56 +84,12 @@ func (s *Service) commands(w http.ResponseWriter, r *http.Request) {
 		http.Error(w, "command expired", 422)
 		return
 	}
-	s.mu.Lock()
-	if existingID, ok := s.byIdempotency[cmd.IdempotencyKey]; ok {
-		existing := s.byIdentity[existingID]
-		s.mu.Unlock()
-		writeJSON(w, http.StatusOK, existing)
-		return
-	}
-	cmd.Status = "accepted"
-	cmd.CreatedAt = time.Now().UTC()
-	cmd.UpdatedAt = cmd.CreatedAt
-	s.byIdentity[cmd.Identity] = cmd
-	s.byIdempotency[cmd.IdempotencyKey] = cmd.Identity
-	s.mu.Unlock()
 	status, packet, err := s.dispatch(r.Context(), cmd)
-	s.mu.Lock()
-	current := s.byIdentity[cmd.Identity]
-	current.UpdatedAt = time.Now().UTC()
 	if err != nil {
-		current.Status = "dispatch_failed"
-		current.ErrorCode = "IOT_DISPATCH_FAILED"
-	} else {
-		current.Status = status
-		current.PacketNumber = packet
-	}
-	s.byIdentity[cmd.Identity] = current
-	s.mu.Unlock()
-	if err != nil {
-		writeJSON(w, http.StatusBadGateway, current)
+		writeJSON(w, http.StatusBadGateway, map[string]any{"identity": cmd.Identity, "status": "dispatch_failed", "error_code": "IOT_DISPATCH_FAILED"})
 		return
 	}
-	writeJSON(w, http.StatusAccepted, current)
-}
-func (s *Service) commandStatus(w http.ResponseWriter, r *http.Request) {
-	if r.Method != http.MethodGet {
-		http.Error(w, "method not allowed", 405)
-		return
-	}
-	if !s.authorized(r) {
-		http.Error(w, "unauthorized", 401)
-		return
-	}
-	identity := strings.TrimPrefix(r.URL.Path, "/v1/device-commands/")
-	s.mu.RLock()
-	cmd, ok := s.byIdentity[identity]
-	s.mu.RUnlock()
-	if !ok {
-		http.Error(w, "not found", 404)
-		return
-	}
-	writeJSON(w, 200, cmd)
+	writeJSON(w, http.StatusAccepted, map[string]any{"identity": cmd.Identity, "status": status, "packet_number": packet})
 }
 func (s *Service) deviceMessage(w http.ResponseWriter, r *http.Request) {
 	if r.Method != http.MethodPost || !s.authorized(r) {
diff --git a/backend/iot-client/internal/service/service_test.go b/backend/iot-gateway/internal/service/service_test.go
similarity index 60%
rename from backend/iot-client/internal/service/service_test.go
rename to backend/iot-gateway/internal/service/service_test.go
index 4f1de02..57aa93f 100644
--- a/backend/iot-client/internal/service/service_test.go
+++ b/backend/iot-gateway/internal/service/service_test.go
@@ -8,10 +8,10 @@ import (
 	"testing"
 	"time"
 
-	"git.apinb.com/heqiapp/platforms/backend/iot-client/internal/config"
+	"git.apinb.com/heqiapp/platforms/backend/iot-gateway/internal/config"
 )
 
-func TestDispatchPreservesIdempotency(t *testing.T) {
+func TestDispatchForwardsCommandMetadata(t *testing.T) {
 	calls := 0
 	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		calls++
@@ -28,7 +28,24 @@ func TestDispatchPreservesIdempotency(t *testing.T) {
 	}
 }
 
-func TestCommandsDoesNotDispatchDuplicateIdempotencyKey(t *testing.T) {
+func TestDeviceMessageForwardsToPlatformAPI(t *testing.T) {
+	var received bool
+	platform := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		received = r.URL.Path == "/heqi/internal/v1/iot/device-messages" && r.Header.Get("X-Heqi-Iot-Token") == "token"
+		w.WriteHeader(http.StatusAccepted)
+	}))
+	defer platform.Close()
+	srv := New(config.Config{HTTP: config.HTTP{InternalToken: "token"}, Upstream: config.Upstream{PlatformAPIURL: platform.URL, Token: "token"}})
+	request := httptest.NewRequest(http.MethodPost, "/internal/v1/device-messages", bytes.NewBufferString(`{"type":"device_message","receivedAt":"2026-08-03T12:00:00Z"}`))
+	request.Header.Set("X-Heqi-Iot-Token", "token")
+	response := httptest.NewRecorder()
+	srv.deviceMessage(response, request)
+	if response.Code != http.StatusAccepted || !received {
+		t.Fatalf("status=%d received=%v body=%s", response.Code, received, response.Body.String())
+	}
+}
+
+func TestCommandsForwardsEveryRequestWithoutLocalState(t *testing.T) {
 	calls := 0
 	upstream := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
 		calls++
@@ -48,7 +65,7 @@ func TestCommandsDoesNotDispatchDuplicateIdempotencyKey(t *testing.T) {
 			t.Fatalf("unexpected status %d: %s", response.Code, response.Body.String())
 		}
 	}
-	if calls != 1 {
-		t.Fatalf("duplicate command dispatched %d times", calls)
+	if calls != 2 {
+		t.Fatalf("stateless gateway forwarded %d requests, want 2", calls)
 	}
 }
diff --git a/backend/worker/cmd/main/main.go b/backend/worker/cmd/main/main.go
index 819bd3a..a0d8e4d 100644
--- a/backend/worker/cmd/main/main.go
+++ b/backend/worker/cmd/main/main.go
@@ -94,7 +94,7 @@ func dispatchIoTOutbox(ctx context.Context) {
 			}
 			payload["identity"] = outbox.CommandIdentity
 			body, _ := json.Marshal(payload)
-			dispatch, err := http.NewRequestWithContext(ctx, http.MethodPost, config.Spec.IoTAPI.ClientBaseURL+"/v1/device-commands", bytes.NewReader(body))
+			dispatch, err := http.NewRequestWithContext(ctx, http.MethodPost, config.Spec.IoTAPI.GatewayBaseURL+"/v1/device-commands", bytes.NewReader(body))
 			if err != nil {
 				continue
 			}
@@ -102,7 +102,7 @@ func dispatchIoTOutbox(ctx context.Context) {
 			dispatch.Header.Set("X-Heqi-Iot-Token", config.Spec.IoTAPI.Token)
 			dispatchResponse, err := client.Do(dispatch)
 			if err != nil {
-				completeIoTOutbox(ctx, client, outbox.Identity, false, 0, "IOT_CLIENT_UNAVAILABLE")
+				completeIoTOutbox(ctx, client, outbox.Identity, false, 0, "IOT_GATEWAY_UNAVAILABLE")
 				continue
 			}
 			var result struct {
@@ -114,7 +114,7 @@ func dispatchIoTOutbox(ctx context.Context) {
 			success := (status == http.StatusAccepted || status == http.StatusOK) && decodeErr == nil
 			errorCode := ""
 			if !success {
-				errorCode = "IOT_CLIENT_REJECTED"
+				errorCode = "IOT_GATEWAY_REJECTED"
 			}
 			completeIoTOutbox(ctx, client, outbox.Identity, success, result.PacketNumber, errorCode)
 		}
diff --git a/backend/worker/etc/platform_worker_dev.yaml b/backend/worker/etc/platform_worker_dev.yaml
index 3c4243a..7682562 100644
--- a/backend/worker/etc/platform_worker_dev.yaml
+++ b/backend/worker/etc/platform_worker_dev.yaml
@@ -13,7 +13,7 @@ PaymentAPI:
   IntervalSeconds: 60
 IoTAPI:
   PlatformBaseURL: http://127.0.0.1:12426
-  ClientBaseURL: http://127.0.0.1:12429
+  GatewayBaseURL: http://127.0.0.1:12429
   Token: change-me-iot-internal-token
   IntervalMilliseconds: 500
 SecretKey: change-me-to-a-random-string
diff --git a/backend/worker/internal/config/config.go b/backend/worker/internal/config/config.go
index cafdc9c..eb15533 100644
--- a/backend/worker/internal/config/config.go
+++ b/backend/worker/internal/config/config.go
@@ -23,7 +23,7 @@ type PaymentAPIConfig struct {
 }
 type IoTAPIConfig struct {
 	PlatformBaseURL      string `yaml:"PlatformBaseURL"`
-	ClientBaseURL        string `yaml:"ClientBaseURL"`
+	GatewayBaseURL       string `yaml:"GatewayBaseURL"`
 	Token                string `yaml:"Token"`
 	IntervalMilliseconds int    `yaml:"IntervalMilliseconds"`
 }
@@ -37,7 +37,7 @@ func New(srvKey string) {
 	if Spec.PaymentAPI.BaseURL == "" || Spec.PaymentAPI.Token == "" || Spec.PaymentAPI.IntervalSeconds <= 0 {
 		panic("PaymentAPI configuration is required")
 	}
-	if Spec.IoTAPI.PlatformBaseURL == "" || Spec.IoTAPI.ClientBaseURL == "" || Spec.IoTAPI.Token == "" || Spec.IoTAPI.IntervalMilliseconds <= 0 {
+	if Spec.IoTAPI.PlatformBaseURL == "" || Spec.IoTAPI.GatewayBaseURL == "" || Spec.IoTAPI.Token == "" || Spec.IoTAPI.IntervalMilliseconds <= 0 {
 		panic("IoTAPI configuration is required")
 	}
 	conf.PrintInfo(Spec.Addr)
diff --git a/checking/02-总体测试计划.md b/checking/02-总体测试计划.md
index e7175ad..d14439c 100644
--- a/checking/02-总体测试计划.md
+++ b/checking/02-总体测试计划.md
@@ -23,7 +23,7 @@
 | Web | `frontend/site` | 官网内容、导航、响应式、静态资源、可访问性、SEO 基础、构建与托管 Worker |
 | 后端 | `backend/api` | Gin API/BFF、JWT、权限、同步事务、状态动作、金额、幂等、审计、上传和数据库事实 |
 | 后端 | `backend/worker` | 配置、启动、Mock 循环、优雅退出；未来 Outbox/Streams 的投递、重试、死信和积压 |
-| 后端 | `backend/iot-client`、`backend/iot-server` | 配置、启动、幂等命令、协议编解码、MQTT TLS、身份、遥测、回执和断线重连 |
+| 后端 | `backend/iot-gateway`、`backend/iot-server` | 配置、启动、无状态转发、协议编解码、MQTT TLS、身份、遥测、回执和断线重连 |
 
 不修改 `sample/`。真实支付、短信、地图、对象存储、电子合同、MQTT 厂商接入等，以受控沙箱或 Mock 验证；生产联调另设上线前检查点。
 
diff --git a/checking/05-执行批次与质量门禁.md b/checking/05-执行批次与质量门禁.md
index 0c277b4..f489f43 100644
--- a/checking/05-执行批次与质量门禁.md
+++ b/checking/05-执行批次与质量门禁.md
@@ -56,7 +56,7 @@ npm run build
 ```bash
 cd backend/api && go test ./... && go vet ./... && go build ./cmd/main/main.go
 cd backend/worker && go test ./... && go vet ./... && go build ./cmd/main/main.go
-cd backend/iot-client && go test ./... && go vet ./... && go build ./cmd/main/main.go
+cd backend/iot-gateway && go test ./... && go vet ./... && go build ./cmd/main/main.go
 cd backend/iot-server && go test ./... && go vet ./... && go build ./cmd/main/main.go
 ```
 
diff --git a/checking/README.md b/checking/README.md
index 188853a..72ea557 100644
--- a/checking/README.md
+++ b/checking/README.md
@@ -24,6 +24,6 @@
 
 ## 计划边界
 
-- `backend/worker` 已投递 IoT Outbox；`backend/iot-client` 与内嵌 Mochi MQTT Broker 的 `backend/iot-server` 已落地系统接口和 MQTT 协议边界。真实设备证书和厂商硬件仍需在联调环境验收。
+- `backend/worker` 已投递 IoT Outbox；无状态 `backend/iot-gateway` 与内嵌 Mochi MQTT Broker 的 `backend/iot-server` 已落地系统接口和 MQTT 协议边界。真实设备证书和厂商硬件仍需在联调环境验收。
 - `frontend/site` 是官网，按展示、响应式、可访问性、链接、构建和托管 Worker 测试；不把它当成业务事实写入端。
 - 本计划不把尚未实现或文档中“待确认”的政策当作通过标准。此类项进入阻塞/待决清单，由产品、安全、财务或法务确认后再固化用例。
diff --git a/docs/10-技术实现规划.md b/docs/10-技术实现规划.md
index 29fe738..36c7cfc 100644
--- a/docs/10-技术实现规划.md
+++ b/docs/10-技术实现规划.md
@@ -53,7 +53,7 @@ flowchart LR
 | --- | --- | --- |
 | `api` | 用户端和五个管理系统的 HTTP API、鉴权、同步业务事务 | 无状态部署；所有写操作支持幂等键、事务和审计 |
 | `worker` | 事件消费、告警、派单、推送、对账、超时扫描、轨迹异常识别 | Redis Streams 消费组；重试、死信、幂等消费和可观测的积压告警 |
-| `iot-client` | 管理系统/App 的设备上下行 HTTP 边界、幂等受理与状态查询 | 不绕过 API 的 JWT、角色、对象归属与安全状态校验 |
+| `iot-gateway` | API/Worker 与 IoT Server 的无状态上下行 HTTP 轻网关 | 不保存业务事实；不绕过 API 的 JWT、角色、对象归属与安全状态校验 |
 | `iot-server` | 内嵌 Mochi MQTT Broker、厂商协议适配、遥测校验、命令下发与回执 | 保持设备会话一致性；每设备认证与 Topic ACL；协议版本、设备身份、LRC8 与 AES 校验 |
 
 关键业务采用“数据库事务 + Outbox 事件表 + Worker 投递”的模式：先在 PostgreSQL 提交业务事实与待投递事件，再异步写入 Redis Streams。这样 Redis 故障或 Worker 重启不会丢失订单、告警、支付或设备命令的业务事实。
@@ -63,7 +63,7 @@ flowchart LR
 | 基线 | 路径 | 使用要求 |
 | --- | --- | --- |
 | 前端工程基线 | 现有 Vue 管理端 | Vue 管理系统统一前端框架、路由、状态管理、请求封装、权限指令、表格表单、主题、错误处理、国际化与测试规范 |
-| 后端工程基线 | `backend/{api,worker,iot-client,iot-server}` | Go API、Worker 与两个 IoT 进程统一沿用配置、日志、错误码、认证、任务、测试和发布规范 |
+| 后端工程基线 | `backend/{api,worker,iot-gateway,iot-server}` | Go API、Worker 与两个 IoT 进程统一沿用配置、日志、错误码、认证、任务、测试和发布规范 |
 
 业务项目应通过共享包、模板或上游同步机制复用标准库，禁止将标准库目录复制到每个子项目后自行漂移。标准库升级需要记录版本、影响范围、兼容策略和回滚方式。
 
@@ -98,7 +98,7 @@ platforms/
   backend/
     api/                      # Go HTTP API、BFF、同步领域事务
     worker/                   # Go 异步任务：派单、告警、通知、对账、超时扫描
-    iot-client/               # 管理系统/App 的设备上下行接口
+    iot-gateway/              # API/Worker 与 IoT Server 的无状态上下行网关
     iot-server/               # MQTT 会话、厂商协议、设备命令、遥测与回执
   contracts/
     openapi/                  # HTTP API 契约及生成配置
@@ -114,7 +114,7 @@ platforms/
     performance/              # 遥测、订单、轨迹与消息积压压测
 ```
 
-其中 `apps/user_app`、`apps/service_app`、`backend/{api,worker,iot-client,iot-server}` 与当前管理端目录已经落地；其余标记为规划的目录仍不得因局部任务提前创建空壳。
+其中 `apps/user_app`、`apps/service_app`、`backend/{api,worker,iot-gateway,iot-server}` 与当前管理端目录已经落地；其余标记为规划的目录仍不得因局部任务提前创建空壳。
 
 ## 6. 后端领域划分
 
diff --git a/docs/11-数据接口与安全.md b/docs/11-数据接口与安全.md
index c1be48f..996f3fb 100644
--- a/docs/11-数据接口与安全.md
+++ b/docs/11-数据接口与安全.md
@@ -44,7 +44,7 @@
 ## 3. IoT 协议与可靠性
 
 - 设备厂商 V1.8 二进制帧保持 `0x5E` 起始、`0x5B` 结束、大端序、数据包 AES-128 与 LRC8 规则不变，并作为 MQTT payload 传输；Topic 使用 `devices/{deviceId}/{up|down|ack}`，QoS 1，下行命令禁止 retained。
-- `iot-server` 使用 Mochi MQTT v2 内嵌 Broker，只处理 MQTT 会话、每设备认证/Topic ACL 和设备协议；`iot-client` 只提供系统侧上下行接口；命令、Outbox、原始上行和回执事实由 API 持久化，Worker 负责可重试投递。
+- `iot-server` 使用 Mochi MQTT v2 内嵌 Broker，只处理 MQTT 会话、每设备认证/Topic ACL 和设备协议；`iot-gateway` 是不保存业务事实的无状态上下行轻网关；命令、幂等、Outbox、原始上行和回执事实由 API 持久化，Worker 负责可重试投递。
 - 协议封面版本与变更记录冲突时以最新 V1.8 变更记录和绿色标注为兼容实现依据；重复子标识等歧义必须保留原始报文并按设备型号配置解析，不得静默猜测。
 
 - 设备采用 MQTT over TLS，设备身份使用每设备证书或短期轮换令牌；禁止共享默认密钥。
diff --git a/scripts/build-backend.sh b/scripts/build-backend.sh
index 139dce6..4bbec18 100644
--- a/scripts/build-backend.sh
+++ b/scripts/build-backend.sh
@@ -2,6 +2,6 @@
 
 set -Eeuo pipefail
 mkdir -p ./output
-for module in api worker iot-client iot-server; do
+for module in api worker iot-gateway iot-server; do
   (cd "./backend/${module}" && GOARCH=amd64 GOOS=linux go build -o "../../output/${module}" ./cmd/main/main.go)
 done
diff --git a/scripts/run_iot.sh b/scripts/run_iot.sh
index a4e9383..0f81e53 100644
--- a/scripts/run_iot.sh
+++ b/scripts/run_iot.sh
@@ -6,6 +6,6 @@ PIDS=()
 cleanup(){ trap - EXIT INT TERM; for pid in "${PIDS[@]}"; do kill "${pid}" 2>/dev/null || true; done; for pid in "${PIDS[@]}"; do wait "${pid}" 2>/dev/null || true; done; }
 trap cleanup EXIT INT TERM
 (cd "${PROJECT_ROOT}/backend/iot-server" && go run ./cmd/main/main.go -config etc/platform_iot_server_dev.yaml) & PIDS+=("$!")
-(cd "${PROJECT_ROOT}/backend/iot-client" && go run ./cmd/main/main.go -config etc/platform_iot_client_dev.yaml) & PIDS+=("$!")
-echo "IoT Server :12428 与 IoT Client :12429 已启动。"
+(cd "${PROJECT_ROOT}/backend/iot-gateway" && go run ./cmd/main/main.go -config etc/platform_iot_gateway_dev.yaml) & PIDS+=("$!")
+echo "IoT Server :12428 与 IoT Gateway :12429 已启动。"
 wait -n "${PIDS[@]}"