diff --git a/.gitignore b/.gitignore
index 4097644..b6b3fab 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,3 +2,6 @@
 /engines/
 /logs/
 *.tmp
+
+# Optional per-frame output, including standalone Orin runs
+output/
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 151691d..5735049 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -13,7 +13,7 @@ find_path(TENSORRT_INCLUDE_DIR NvInfer.h PATH_SUFFIXES aarch64-linux-gnu x86_64-
 find_library(TENSORRT_LIBRARY nvinfer REQUIRED)
 add_library(camera_risk_core
   src/trt_engine.cpp src/pose_engine.cu src/gpu_preprocess.cu src/uyvy_converter.cu
-  src/detector.cpp src/door_risk.cpp src/camera.cpp src/camera_pipeline.cpp src/config.cpp src/lazy_gate.cpp src/can_input.cpp src/can_comm.cpp)
+  src/detector.cpp src/door_risk.cpp src/camera.cpp src/camera_pipeline.cpp src/serialization.cpp src/output_writer.cpp src/result_renderer.cpp src/config.cpp src/lazy_gate.cpp src/can_input.cpp src/can_comm.cpp)
 target_include_directories(camera_risk_core PUBLIC include third_party ${TENSORRT_INCLUDE_DIR} ${OpenCV_INCLUDE_DIRS})
 target_link_libraries(camera_risk_core PUBLIC ${TENSORRT_LIBRARY} ${OpenCV_LIBS} Threads::Threads CUDA::cudart CUDA::nppc CUDA::nppig CUDA::nppidei CUDA::nppicc
   "${CMAKE_SOURCE_DIR}/orin/lib/libusbcanfd.so" "${CMAKE_SOURCE_DIR}/orin/lib/libusb-1.0.so")
diff --git a/README.md b/README.md
index 495f486..61a15a5 100644
--- a/README.md
+++ b/README.md
@@ -74,3 +74,22 @@ if (result) {
 - `scripts/`：编译、初始化、打包；`third_party/`：JSON 依赖。
 
 模型和推理算法沿用纯推理基线。当前门 mask 为研发机位配置，装车需按实际机位标定。
+
+## 可选保存（默认全部关闭）
+
+三个独立参数可以单独使用，也可以组合：
+
+```bash
+./run_camera.sh --save-original --save-annotated --save-results
+# 独立包：./orin/run.sh --save-original --save-annotated --save-results
+```
+
+开启任一项时，程序自动创建可执行文件所属工程的 `output/` 及三个子目录：
+
+- `original/`：`--save-original` 保存未叠加的原图，JPEG 质量 95。
+- `annotated/`：`--save-annotated` 保存带框、关键点及风险文字的 JPEG，无需开启可视化窗口。
+- `results/`：`--save-results` 每个完成推理的帧保存一个 JSON，包含帧号、检测框、跟踪 ID、关键点及置信度、风险和耗时；有 CAN 的分支还包含相应状态。
+
+同一帧三类文件同名（扩展名不同），文件名包含运行标识和帧号，多次运行不覆盖。JSON 的 `images` 提供相对于 `output/` 的图片路径，未选择保存的图片为 null。源码入口写入工程 `output/`；独立包入口写入 `orin/output/`。默认不创建目录、不保存文件。
+
+保存对象是完成推理的帧；惰性分支暂停时不新增文件。开启保存会增加编码和磁盘 I/O 开销。写入失败时报告错误并停止，不静默丢失文件。
diff --git a/include/camera_pipeline.hpp b/include/camera_pipeline.hpp
index 165a36f..d47de62 100644
--- a/include/camera_pipeline.hpp
+++ b/include/camera_pipeline.hpp
@@ -1,6 +1,7 @@
 #pragma once
 #include "camera.hpp"
 #include "frame_result.hpp"
+#include "output_writer.hpp"
 #include "lazy_gate.hpp"
 #include <filesystem>
 #include <memory>
@@ -8,6 +9,7 @@
 namespace cms {
 struct PipelineConfig {
     CameraConfig camera;
+    OutputOptions output;
     LazyGateConfig lazy_gate;
     std::filesystem::path engines,door_mask;
     double detector_confidence{0.30};
diff --git a/include/output_writer.hpp b/include/output_writer.hpp
new file mode 100644
index 0000000..2f8f0d6
--- /dev/null
+++ b/include/output_writer.hpp
@@ -0,0 +1,20 @@
+#pragma once
+#include "frame_result.hpp"
+#include <filesystem>
+#include <string>
+namespace cms {
+struct OutputOptions {
+    bool original{},annotated{},results{};
+    std::filesystem::path directory;
+    bool enabled() const {return original||annotated||results;}
+};
+// Called by the inference worker; one matching filename stem per completed frame.
+class OutputWriter {
+public:
+    explicit OutputWriter(OutputOptions options);
+    void write(FrameResult const& result);
+private:
+    OutputOptions options_;
+    std::string runId_;
+};
+}
diff --git a/include/serialization.hpp b/include/serialization.hpp
new file mode 100644
index 0000000..d6e7fc2
--- /dev/null
+++ b/include/serialization.hpp
@@ -0,0 +1,4 @@
+#pragma once
+#include "frame_result.hpp"
+#include "door_risk.hpp"
+namespace cms { Json serializeResult(FrameResult const& result); }
diff --git a/orin/README.md b/orin/README.md
index c40305f..345f9cc 100644
--- a/orin/README.md
+++ b/orin/README.md
@@ -15,3 +15,21 @@ CAN 0x391 的 data[0..3] 为左前、右前、左后、右后百分比。左前
 模型只加载预热一次并常驻；相机和 CAN 始终运行。重复相同开度保留运动方向 300 ms，之后视为静止。参数见 config/camera.json 的 lazy_inference。默认结果保存在 C++ 内存，不写逐帧文件；暂停时 latest() 为空。标准输出记录启停状态与累计模型运行次数。
 
 文件完整性：`sha256sum -c SHA256SUMS`。
+
+## 可选保存（默认全部关闭）
+
+三个独立参数可以单独使用，也可以组合：
+
+```bash
+./run.sh --save-original --save-annotated --save-results
+```
+
+开启任一项时，程序自动创建可执行文件所属工程的 `output/` 及三个子目录：
+
+- `original/`：`--save-original` 保存未叠加的原图，JPEG 质量 95。
+- `annotated/`：`--save-annotated` 保存带框、关键点及风险文字的 JPEG，无需开启可视化窗口。
+- `results/`：`--save-results` 每个完成推理的帧保存一个 JSON，包含帧号、检测框、跟踪 ID、关键点及置信度、风险和耗时；有 CAN 的分支还包含相应状态。
+
+同一帧三类文件同名（扩展名不同），文件名包含运行标识和帧号，多次运行不覆盖。JSON 的 `images` 提供相对于 `output/` 的图片路径，未选择保存的图片为 null。源码入口写入工程 `output/`；独立包入口写入 `orin/output/`。默认不创建目录、不保存文件。
+
+保存对象是完成推理的帧；惰性分支暂停时不新增文件。开启保存会增加编码和磁盘 I/O 开销。写入失败时报告错误并停止，不静默丢失文件。
diff --git a/orin/SHA256SUMS b/orin/SHA256SUMS
index 4d682c1..33bc824 100644
--- a/orin/SHA256SUMS
+++ b/orin/SHA256SUMS
@@ -1,8 +1,8 @@
-cc83bfe41b66445843ef56b535e267939ed7944869474ca5aed6908f981b4687  ./README.md
+5a78784dd7ea279618d3b6cf0c63be4b6b6f20f5ce6c9b13ff32bc9001e73ca6  ./README.md
 6d5e874fd27fcfd75d303d7e35d9672028af71041f52dcc82a1e83676faefa65  ./bin/drivers/max9295.ko
 8a78d04ef8be44e9b62a5e4ee315d3d6d679e34aedff02a234bbf4d40e222933  ./bin/drivers/max9296.ko
 3da628587477cc35d5e3f8aee86e718e2ddf16808e893e00ba6e164b2307e843  ./bin/drivers/sgx-yuv-gmsl2.ko
-9b467b4caf53d5cc5cdb5f71687e246146c05ef72fc7d7c593681409f63eec70  ./build/camera_risk
+2675d6cfafef74d75bcf8fba460cf2cad4c3dc80779614e45b0565db34abba21  ./build/camera_risk
 951c514ee76e10233a84746f25a884e0a1e8cbed84df57845a5aff66af9aecbd  ./config/camera.json
 9ba768d559fd3b64e833b50c62c70f2adfd6c169620aea5fba32cfb1b4c5b0e9  ./config/door_mask.json
 ebcd09e8c2e35008adbb0c1d222e580b17e0df1c8093df3481ba3374cd9a8174  ./engines/rtmw_l_384.engine
diff --git a/orin/build/camera_risk b/orin/build/camera_risk
index c57dd89..4a2fb35 100755
Binary files a/orin/build/camera_risk and b/orin/build/camera_risk differ
diff --git a/scripts/package_orin.sh b/scripts/package_orin.sh
index 858ac9e..ba0280c 100755
--- a/scripts/package_orin.sh
+++ b/scripts/package_orin.sh
@@ -7,6 +7,6 @@ cp -p "$root/config/door_mask.json" "$root/orin/config/"
 sed 's|../orin/engines|../engines|' "$root/config/camera.json" > "$root/orin/config/camera.json"
 (
   cd "$root/orin"
-  find . -type f ! -path './outputs/*' ! -path './logs/*' ! -name SHA256SUMS -print0 |
+  find . -type f ! -path './output/*' ! -path './outputs/*' ! -path './logs/*' ! -name SHA256SUMS -print0 |
     sort -z | xargs -0 sha256sum > SHA256SUMS
 )
diff --git a/src/camera_pipeline.cpp b/src/camera_pipeline.cpp
index 200aa6a..962c412 100644
--- a/src/camera_pipeline.cpp
+++ b/src/camera_pipeline.cpp
@@ -52,6 +52,7 @@ struct CameraPipeline::Impl {
     BoundedQueue<Pending> captures;
     BoundedQueue<Detected> detections;
     LatestResult results;
+    std::unique_ptr<OutputWriter> outputWriter;
     fangjia::TrtLogger logger;
     std::unique_ptr<Detector> detector;
     std::unique_ptr<fangjia::RtmwEngine> pose;
@@ -99,6 +100,7 @@ struct CameraPipeline::Impl {
     void start() {
         {std::lock_guard<std::mutex> lock(stateMutex);if(started||stopped)throw std::logic_error("CameraPipeline can only be started once");started=true;}
         try {
+            outputWriter=std::make_unique<OutputWriter>(config.output);
             detector=std::make_unique<Detector>(config.engines/"yolo11s.engine",logger,config.detector_confidence,config.max_people);
             pose=std::make_unique<fangjia::RtmwEngine>(config.engines/"rtmw_l_384.engine",logger,config.camera.width,config.camera.height,config.max_people);
             DoorOptions options;options.constant=config.door_mask;options.warning=config.warning_relative;options.release=config.release_relative;
@@ -192,6 +194,7 @@ struct CameraPipeline::Impl {
             FrameResultPtr immutable=result;
             results.publish(std::move(immutable));
             {std::lock_guard<std::mutex> lock(stateMutex);totalLatency+=result->timing.capture_to_result_ms;++published;}
+            outputWriter->write(*result);
         }
         active=false;
     }
diff --git a/src/main.cpp b/src/main.cpp
index 9eb5abe..d8cd6c6 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -13,20 +13,25 @@
 int main(int argc,char** argv)try {
     auto root=std::filesystem::canonical("/proc/self/exe").parent_path().parent_path();
     auto configPath=root/"config/camera.json";
+    cms::OutputOptions output;output.directory=root/"output";
     bool visualize=false;double duration=0;
     auto value=[&](int& i){if(++i>=argc)throw std::invalid_argument("Missing option value");return std::string(argv[i]);};
     for(int i=1;i<argc;++i) {
         std::string arg=argv[i];
         if(arg=="--config")configPath=value(i);
+        else if(arg=="--save-original")output.original=true;
+        else if(arg=="--save-annotated")output.annotated=true;
+        else if(arg=="--save-results")output.results=true;
         else if(arg=="--visualize")visualize=true;
         else if(arg=="--duration") {duration=std::stod(value(i));if(!std::isfinite(duration)||duration<0)throw std::invalid_argument("Invalid duration");}
         else if(arg=="--help") {
-            std::cout<<"camera_risk [--config FILE] [--visualize] [--duration SECONDS]\n"
+            std::cout<<"camera_risk [--save-original] [--save-annotated] [--save-results] [--config FILE] [--visualize] [--duration SECONDS]\n"
                      <<"C++ lazy inference; resident warm engines, continuous CAN reception.\n";return 0;
         }else throw std::invalid_argument("Unknown option: "+arg);
     }
     cv::setNumThreads(2);
-    cms::CameraPipeline pipeline(cms::loadConfig(configPath));
+    auto config=cms::loadConfig(configPath);config.output=output;
+    cms::CameraPipeline pipeline(config);
     cms::StopSignals signals(pipeline);pipeline.start();
     auto started=std::chrono::steady_clock::now();std::atomic<bool> monitorStop{false};
     std::thread monitor([&] {
diff --git a/src/output_writer.cpp b/src/output_writer.cpp
new file mode 100644
index 0000000..77c96e1
--- /dev/null
+++ b/src/output_writer.cpp
@@ -0,0 +1,69 @@
+#include "output_writer.hpp"
+#include "serialization.hpp"
+#include "visualizer.hpp"
+#include <opencv2/imgcodecs.hpp>
+#include <chrono>
+#include <ctime>
+#include <fstream>
+#include <iomanip>
+#include <iostream>
+#include <sstream>
+#include <unistd.h>
+
+namespace cms {
+namespace {
+void writeFile(std::filesystem::path const& path,char const* data,std::size_t size) {
+    auto temporary=path;temporary+=".tmp";
+    try {
+        std::ofstream file;file.exceptions(std::ios::failbit|std::ios::badbit);
+        file.open(temporary,std::ios::binary|std::ios::trunc);
+        file.write(data,static_cast<std::streamsize>(size));file.close();
+        std::filesystem::rename(temporary,path);
+    } catch(...) {
+        std::error_code ignored;std::filesystem::remove(temporary,ignored);
+        throw std::runtime_error("Cannot save output file: "+path.string());
+    }
+}
+void writeJpeg(std::filesystem::path const& path,cv::Mat const& image) {
+    std::vector<unsigned char> encoded;
+    if(!cv::imencode(".jpg",image,encoded,{cv::IMWRITE_JPEG_QUALITY,95}))
+        throw std::runtime_error("JPEG encoding failed: "+path.string());
+    writeFile(path,reinterpret_cast<char const*>(encoded.data()),encoded.size());
+}
+}
+OutputWriter::OutputWriter(OutputOptions options):options_(std::move(options)) {
+    if(!options_.enabled())return;
+    if(options_.directory.empty())options_.directory=std::filesystem::current_path()/"output";
+    for(auto name:{"original","annotated","results"})std::filesystem::create_directories(options_.directory/name);
+    // Nanosecond wall-clock + PID prevents a later run from overwriting earlier frames.
+    auto now=std::chrono::system_clock::now();auto time=std::chrono::system_clock::to_time_t(now);
+    std::tm utc{};gmtime_r(&time,&utc);
+    auto ns=std::chrono::duration_cast<std::chrono::nanoseconds>(now.time_since_epoch()).count()%1000000000;
+    std::ostringstream id;id<<std::put_time(&utc,"%Y%m%dT%H%M%S")<<'_'<<std::setw(9)<<std::setfill('0')<<ns<<"Z_"<<getpid();
+    runId_=id.str();
+    std::cout<<"Saving selected outputs to "<<options_.directory<<std::endl;
+}
+void OutputWriter::write(FrameResult const& result) {
+    if(!options_.enabled())return;
+    std::ostringstream name;name<<runId_<<"_frame_"<<std::setw(10)<<std::setfill('0')<<result.frame_index;
+    auto stem=name.str();Json original=nullptr,annotated=nullptr;
+    if(options_.original) {
+        if(!result.image)throw std::runtime_error("Cannot save original image: frame is missing");
+        auto const& image=*result.image;
+        if(image.width<=0||image.height<=0||image.stride<image.width*3||image.pixels.size()<std::size_t(image.stride)*image.height)
+            throw std::runtime_error("Cannot save malformed original image");
+        cv::Mat view(image.height,image.width,CV_8UC3,const_cast<std::uint8_t*>(image.pixels.data()),image.stride);
+        auto path=std::filesystem::path("original")/(stem+".jpg");writeJpeg(options_.directory/path,view);original=path.generic_string();
+    }
+    if(options_.annotated) {
+        auto path=std::filesystem::path("annotated")/(stem+".jpg");
+        writeJpeg(options_.directory/path,renderResult(result));annotated=path.generic_string();
+    }
+    if(options_.results) {
+        auto document=serializeResult(result);document["schema_version"]=1;document["run_id"]=runId_;
+        document["images"]={{"original",original},{"annotated",annotated}};
+        auto contents=document.dump(2)+"\n";
+        writeFile(options_.directory/"results"/(stem+".json"),contents.data(),contents.size());
+    }
+}
+}
diff --git a/src/result_renderer.cpp b/src/result_renderer.cpp
new file mode 100644
index 0000000..a315abf
--- /dev/null
+++ b/src/result_renderer.cpp
@@ -0,0 +1,80 @@
+#include "visualizer.hpp"
+#include <opencv2/imgproc.hpp>
+#include <algorithm>
+#include <cmath>
+#include <iomanip>
+#include <sstream>
+#include <stdexcept>
+
+namespace cms {
+namespace {
+cv::Point point(PosePoint const& p){return {int(std::nearbyint(p.x)),int(std::nearbyint(p.y))};}
+cv::Scalar color(std::string const& level) {
+    if(level=="danger")return {40,40,255};
+    if(level=="warning")return {0,160,255};
+    if(level=="watch")return {0,240,240};
+    if(level=="clear")return {80,220,90};
+    return {190,190,190};
+}
+void segment(cv::Mat& image,cv::Point a,cv::Point b,cv::Scalar c,int thickness,bool dashed) {
+    if(!dashed){cv::line(image,a,b,c,thickness,cv::LINE_AA);return;}
+    cv::Point2d d=b-a;double length=cv::norm(d);if(length<1)return;d*=1.0/length;
+    for(double x=0;x<length;x+=14)cv::line(image,cv::Point2d(a)+d*x,cv::Point2d(a)+d*std::min(x+8,length),c,thickness,cv::LINE_AA);
+}
+}
+cv::Mat renderResult(FrameResult const& r) {
+    if(!r.image)throw std::invalid_argument("Result has no frame image");
+    auto const& image=*r.image;
+    if(image.width<=0||image.height<=0||image.stride<image.width*3||image.pixels.size()<std::size_t(image.stride)*image.height)
+        throw std::invalid_argument("Malformed result image");
+    cv::Mat view(image.height,image.width,CV_8UC3,const_cast<std::uint8_t*>(image.pixels.data()),image.stride);
+    auto canvas=view.clone();
+    if(r.door_mask_pixels) {
+        auto const& m=*r.door_mask_pixels;
+        if(m.width!=image.width||m.height!=image.height||m.stride<m.width||m.pixels.size()<std::size_t(m.stride)*m.height)
+            throw std::invalid_argument("Result mask does not match image");
+        cv::Mat mask(m.height,m.width,CV_8U,const_cast<std::uint8_t*>(m.pixels.data()),m.stride);
+        auto tint=canvas.clone();tint.setTo(cv::Scalar(255,180,0),mask);
+        cv::addWeighted(canvas,0.75,tint,0.25,0,canvas);
+        std::vector<std::vector<cv::Point>> contours;cv::findContours(mask.clone(),contours,cv::RETR_EXTERNAL,cv::CHAIN_APPROX_SIMPLE);
+        cv::drawContours(canvas,contours,-1,{255,180,0},2);
+    }
+    for(auto const& person:r.persons) {
+        auto const& b=person.box;
+        cv::rectangle(canvas,{int(b[0]),int(b[1])},{int(b[2]),int(b[3])},{0,220,255},2);
+        std::ostringstream text;text<<"ID "<<person.track_id<<" "<<std::fixed<<std::setprecision(2)<<person.confidence;
+        cv::putText(canvas,text.str(),{int(b[0])+4,std::max(180,int(b[1])+25)},cv::FONT_HERSHEY_SIMPLEX,.8,{0,220,255},2,cv::LINE_AA);
+        for(int s=0;s<2;++s) {
+            auto const& state=person.hands[s];auto const& k=person.selected;
+            cv::Scalar arm=s==0?cv::Scalar(40,40,255):cv::Scalar(30,230,30);
+            for(auto e:std::vector<std::pair<int,int>>{{5+s,7+s},{7+s,9+s}}) {
+                segment(canvas,point(k[e.first]),point(k[e.second]),state.limb_consensus?arm:cv::Scalar(0,140,255),3,!state.limb_consensus);
+                cv::circle(canvas,point(k[e.second]),4,arm,-1,cv::LINE_AA);
+            }
+            if(state.state=="rejected")continue;
+            int start=s==0?91:112;
+            auto hand=state.distance_eligible?(s==0?cv::Scalar(255,80,220):cv::Scalar(255,190,40)):cv::Scalar(0,140,255);
+            for(int f=0;f<5;++f)for(int j=0;j<4;++j){int a=j==0?start:start+f*4+j;int b=start+1+f*4+j;segment(canvas,point(k[a]),point(k[b]),hand,2,!state.distance_eligible);}
+            for(int j=0;j<21;++j)cv::circle(canvas,point(k[start+j]),3,hand,-1,cv::LINE_AA);
+        }
+    }
+    for(auto const& h:r.hand_regions) {
+        std::vector<cv::Point> points,hull;for(auto const& p:h.keypoints)points.push_back(point(p));cv::convexHull(points,hull);
+        auto risk=std::find_if(r.risk.regions.begin(),r.risk.regions.end(),[&](auto const& item){return item.track_id==h.track_id&&item.side==h.side;});
+        auto c=color(risk==r.risk.regions.end()?"unavailable":risk->risk_level);
+        cv::polylines(canvas,std::vector<std::vector<cv::Point>>{hull},true,c,2,cv::LINE_AA);
+    }
+    for(auto const& region:r.risk.regions)if(region.source=="YOLO_BODY_BOX_FALLBACK") {
+        auto it=std::find(r.track_ids.begin(),r.track_ids.end(),region.track_id);
+        if(it!=r.track_ids.end()){auto const& b=r.boxes.at(it-r.track_ids.begin());cv::putText(canvas,"BODY FALLBACK",{int(b[0])+4,int(b[1])+50},cv::FONT_HERSHEY_SIMPLEX,.65,{0,160,255},2,cv::LINE_AA);}
+    }
+    cv::rectangle(canvas,{0,0},{canvas.cols,148},{20,24,30},-1);
+    std::ostringstream headline;headline<<"RISK ";if(r.risk.risk_score)headline<<std::fixed<<std::setprecision(3)<<*r.risk.risk_score;else headline<<"N/A";headline<<"  "<<r.risk.risk_level;
+    cv::putText(canvas,headline.str(),{24,40},cv::FONT_HERSHEY_SIMPLEX,1.0,color(r.risk.risk_level),2,cv::LINE_AA);
+    std::ostringstream status;status<<"camera frame "<<r.frame_index<<" | seq "<<r.capture.driver_sequence<<" | latency "<<std::fixed<<std::setprecision(1)<<r.timing.capture_to_result_ms<<" ms";
+    cv::putText(canvas,status.str(),{24,82},cv::FONT_HERSHEY_SIMPLEX,.72,{235,235,235},2,cv::LINE_AA);
+    std::string calibration=r.door_mask_calibration_verified?"door calibration verified":"door calibration NOT verified (bring-up)";
+    cv::putText(canvas,calibration+" | q/Esc: close preview",{24,123},cv::FONT_HERSHEY_SIMPLEX,.70,{0,190,255},2,cv::LINE_AA);
+    return canvas;
+}
+}
diff --git a/src/serialization.cpp b/src/serialization.cpp
new file mode 100644
index 0000000..57f9e10
--- /dev/null
+++ b/src/serialization.cpp
@@ -0,0 +1,47 @@
+#include "serialization.hpp"
+namespace cms {
+namespace {
+template<class T> Json optional(std::optional<T> const& x){return x?Json(*x):Json(nullptr);}
+Json riskJson(RiskResult const& r) {
+    Json out={{"status",r.status},{"risk_score",optional(r.risk_score)},{"risk_level",r.risk_level},{"decision",r.decision},{"source",optional(r.source)},{"track_id",optional(r.track_id)},{"side",optional(r.side)},{"regions",Json::array()}};
+    if(!r.door_mask.status.empty()) {
+        auto const& d=r.door_mask;out["door_mask"]={{"status",d.status},{"annotation_index",d.annotation_index},{"path",optional(d.path)},{"format",d.format},{"area_px",d.area_px}};
+        out["warning_distance_relative"]=r.warning_distance_relative;out["release_distance_relative"]=r.release_distance_relative;
+    }
+    for(auto const& v:r.regions) {
+        Json j={{"status",v.status},{"risk_score",optional(v.risk_score)},{"risk_level",v.risk_level},{"decision",v.decision},{"source",v.source},{"track_id",v.track_id},{"side",v.side}};
+        if(v.state)j["state"]=*v.state;
+        if(v.region_area_px) {
+            j["region_area_px"]=optional(v.region_area_px);j["door_overlap_px"]=optional(v.door_overlap_px);j["region_overlap_ratio"]=optional(v.region_overlap_ratio);
+            j["min_distance_px"]=optional(v.min_distance_px);j["region_scale_px"]=optional(v.region_scale_px);j["distance_relative"]=optional(v.distance_relative);
+        }
+        out["regions"].push_back(std::move(j));
+    }
+    return out;
+}
+}
+Json serializeResult(FrameResult const& r) {
+    Json out={{"frame_index",r.frame_index},{"track_ids",r.track_ids},{"boxes",r.boxes},{"skeletons",Json::array()},{"risk",riskJson(r.risk)}};
+    for(std::size_t i=0;i<r.persons.size();++i) {
+        auto const& p=r.persons[i];Json points=Json::array(),metadata=Json::object();for(auto const& k:p.selected)points.push_back({rounded(k.x,3),rounded(k.y,3)});
+        for(int s=0;s<2;++s){auto const& h=p.hands[s];metadata[s==0?"left":"right"]={{"limb_state",h.limb_consensus?"consensus":"inferred"},{"hand_source",h.source},{"hand_state",h.state},{"distance_eligible",h.distance_eligible},{"alarm_eligible",h.alarm_eligible}};}
+        out["skeletons"].push_back({{"track_id",p.track_id},{"person_index",i},{"layout","coco_wholebody_133"},{"keypoints",points},{"metadata",metadata}});
+    }
+    auto const& state=r.inference;
+    out["inference"]={{"models_ready",state.models_ready},{"enabled",state.enabled},{"can_valid",state.can_valid},{"positions",state.positions},{"direction",state.direction},{"left_front_trigger",state.left_front_trigger},{"left_rear_trigger",state.left_rear_trigger},{"generation",state.generation},{"can_age_ms",state.can_age_ms},{"reason",state.reason}};
+    for(std::size_t i=0;i<r.persons.size();++i) {
+        auto const& p=r.persons[i];auto& skeleton=out["skeletons"][i];
+        skeleton["confidence"]=p.confidence;skeleton["keypoint_scores"]=Json::array();
+        skeleton["smoothed_keypoints"]=Json::array();skeleton["temporal_keypoints"]=Json::array();
+        for(std::size_t k=0;k<p.selected.size();++k) {
+            skeleton["keypoint_scores"].push_back(p.selected[k].score);
+            auto const& a=p.smoothed[k];auto const& b=p.temporal[k];
+            skeleton["smoothed_keypoints"].push_back({a.x,a.y,a.score});
+            skeleton["temporal_keypoints"].push_back({b.x,b.y,b.score});
+        }
+    }
+    out["timing"]={{"detector_ms",r.timing.detector_ms},{"pose_ms",r.timing.pose_ms},{"fusion_risk_ms",r.timing.fusion_risk_ms},{"capture_to_result_ms",r.timing.capture_to_result_ms}};
+    out["capture"]={{"sequence",r.capture.driver_sequence},{"capture_monotonic_ms",r.capture.capture_monotonic_ns*1e-6},{"driver_timestamp_ms",r.capture.driver_timestamp_ns*1e-6}};
+    out["capture_to_result_ms"]=rounded(r.timing.capture_to_result_ms,3);out["calibration_verified"]=r.door_mask_calibration_verified;return out;
+}
+}
diff --git a/src/visualizer.cpp b/src/visualizer.cpp
index 9a7f48f..ac9d187 100644
--- a/src/visualizer.cpp
+++ b/src/visualizer.cpp
@@ -3,84 +3,8 @@
 #include <opencv2/highgui.hpp>
 #include <opencv2/highgui/highgui_c.h>
 #include <opencv2/imgproc.hpp>
-#include <algorithm>
-#include <cmath>
-#include <iomanip>
-#include <sstream>
-#include <stdexcept>
-
 namespace cms {
-namespace {
-constexpr char windowName[]="CMS Camera Risk";
-cv::Point point(PosePoint const& p){return {int(std::nearbyint(p.x)),int(std::nearbyint(p.y))};}
-cv::Scalar color(std::string const& level) {
-    if(level=="danger")return {40,40,255};
-    if(level=="warning")return {0,160,255};
-    if(level=="watch")return {0,240,240};
-    if(level=="clear")return {80,220,90};
-    return {190,190,190};
-}
-void segment(cv::Mat& image,cv::Point a,cv::Point b,cv::Scalar c,int thickness,bool dashed) {
-    if(!dashed){cv::line(image,a,b,c,thickness,cv::LINE_AA);return;}
-    cv::Point2d d=b-a;double length=cv::norm(d);if(length<1)return;d*=1.0/length;
-    for(double x=0;x<length;x+=14)cv::line(image,cv::Point2d(a)+d*x,cv::Point2d(a)+d*std::min(x+8,length),c,thickness,cv::LINE_AA);
-}
-}
-cv::Mat renderResult(FrameResult const& r) {
-    if(!r.image)throw std::invalid_argument("Result has no frame image");
-    auto const& image=*r.image;
-    if(image.width<=0||image.height<=0||image.stride<image.width*3||image.pixels.size()<std::size_t(image.stride)*image.height)
-        throw std::invalid_argument("Malformed result image");
-    cv::Mat view(image.height,image.width,CV_8UC3,const_cast<std::uint8_t*>(image.pixels.data()),image.stride);
-    auto canvas=view.clone();
-    if(r.door_mask_pixels) {
-        auto const& m=*r.door_mask_pixels;
-        if(m.width!=image.width||m.height!=image.height||m.stride<m.width||m.pixels.size()<std::size_t(m.stride)*m.height)
-            throw std::invalid_argument("Result mask does not match image");
-        cv::Mat mask(m.height,m.width,CV_8U,const_cast<std::uint8_t*>(m.pixels.data()),m.stride);
-        auto tint=canvas.clone();tint.setTo(cv::Scalar(255,180,0),mask);
-        cv::addWeighted(canvas,0.75,tint,0.25,0,canvas);
-        std::vector<std::vector<cv::Point>> contours;cv::findContours(mask.clone(),contours,cv::RETR_EXTERNAL,cv::CHAIN_APPROX_SIMPLE);
-        cv::drawContours(canvas,contours,-1,{255,180,0},2);
-    }
-    for(auto const& person:r.persons) {
-        auto const& b=person.box;
-        cv::rectangle(canvas,{int(b[0]),int(b[1])},{int(b[2]),int(b[3])},{0,220,255},2);
-        std::ostringstream text;text<<"ID "<<person.track_id<<" "<<std::fixed<<std::setprecision(2)<<person.confidence;
-        cv::putText(canvas,text.str(),{int(b[0])+4,std::max(180,int(b[1])+25)},cv::FONT_HERSHEY_SIMPLEX,.8,{0,220,255},2,cv::LINE_AA);
-        for(int s=0;s<2;++s) {
-            auto const& state=person.hands[s];auto const& k=person.selected;
-            cv::Scalar arm=s==0?cv::Scalar(40,40,255):cv::Scalar(30,230,30);
-            for(auto e:std::vector<std::pair<int,int>>{{5+s,7+s},{7+s,9+s}}) {
-                segment(canvas,point(k[e.first]),point(k[e.second]),state.limb_consensus?arm:cv::Scalar(0,140,255),3,!state.limb_consensus);
-                cv::circle(canvas,point(k[e.second]),4,arm,-1,cv::LINE_AA);
-            }
-            if(state.state=="rejected")continue;
-            int start=s==0?91:112;
-            auto hand=state.distance_eligible?(s==0?cv::Scalar(255,80,220):cv::Scalar(255,190,40)):cv::Scalar(0,140,255);
-            for(int f=0;f<5;++f)for(int j=0;j<4;++j){int a=j==0?start:start+f*4+j;int b=start+1+f*4+j;segment(canvas,point(k[a]),point(k[b]),hand,2,!state.distance_eligible);}
-            for(int j=0;j<21;++j)cv::circle(canvas,point(k[start+j]),3,hand,-1,cv::LINE_AA);
-        }
-    }
-    for(auto const& h:r.hand_regions) {
-        std::vector<cv::Point> points,hull;for(auto const& p:h.keypoints)points.push_back(point(p));cv::convexHull(points,hull);
-        auto risk=std::find_if(r.risk.regions.begin(),r.risk.regions.end(),[&](auto const& item){return item.track_id==h.track_id&&item.side==h.side;});
-        auto c=color(risk==r.risk.regions.end()?"unavailable":risk->risk_level);
-        cv::polylines(canvas,std::vector<std::vector<cv::Point>>{hull},true,c,2,cv::LINE_AA);
-    }
-    for(auto const& region:r.risk.regions)if(region.source=="YOLO_BODY_BOX_FALLBACK") {
-        auto it=std::find(r.track_ids.begin(),r.track_ids.end(),region.track_id);
-        if(it!=r.track_ids.end()){auto const& b=r.boxes.at(it-r.track_ids.begin());cv::putText(canvas,"BODY FALLBACK",{int(b[0])+4,int(b[1])+50},cv::FONT_HERSHEY_SIMPLEX,.65,{0,160,255},2,cv::LINE_AA);}
-    }
-    cv::rectangle(canvas,{0,0},{canvas.cols,148},{20,24,30},-1);
-    std::ostringstream headline;headline<<"RISK ";if(r.risk.risk_score)headline<<std::fixed<<std::setprecision(3)<<*r.risk.risk_score;else headline<<"N/A";headline<<"  "<<r.risk.risk_level;
-    cv::putText(canvas,headline.str(),{24,40},cv::FONT_HERSHEY_SIMPLEX,1.0,color(r.risk.risk_level),2,cv::LINE_AA);
-    std::ostringstream status;status<<"camera frame "<<r.frame_index<<" | seq "<<r.capture.driver_sequence<<" | latency "<<std::fixed<<std::setprecision(1)<<r.timing.capture_to_result_ms<<" ms";
-    cv::putText(canvas,status.str(),{24,82},cv::FONT_HERSHEY_SIMPLEX,.72,{235,235,235},2,cv::LINE_AA);
-    std::string calibration=r.door_mask_calibration_verified?"door calibration verified":"door calibration NOT verified (bring-up)";
-    cv::putText(canvas,calibration+" | q/Esc: close preview",{24,123},cv::FONT_HERSHEY_SIMPLEX,.70,{0,190,255},2,cv::LINE_AA);
-    return canvas;
-}
+namespace { constexpr char windowName[]="CMS Camera Risk"; }
 void runLocalVisualization(CameraPipeline const& pipeline) {
     struct Window {
         Window(){cv::namedWindow(windowName,cv::WINDOW_NORMAL);cv::resizeWindow(windowName,1000,800);}