diff --git a/concoredocker.hpp b/concoredocker.hpp
index a636a265..cbce7184 100644
--- a/concoredocker.hpp
+++ b/concoredocker.hpp
@@ -1 +1,130 @@
-// concoredocker.hpp -- this C++ include file will be the equivalent of concoredocker.py
+#ifndef CONCORE_HPP
+#define CONCORE_HPP
+
+#include <iostream>
+#include <fstream>
+#include <sstream>
+#include <string>
+#include <unordered_map>
+#include <vector>
+#include <chrono>
+#include <thread>
+#include <filesystem>
+#include <stdexcept>
+#include <regex>
+
+class Concore {
+public:
+    std::unordered_map<std::string, std::string> iport;
+    std::unordered_map<std::string, std::string> oport;
+    std::string s, olds;
+    int delay = 1;
+    int retrycount = 0;
+    std::string inpath = "/in";
+    std::string outpath = "/out";
+    int simtime = 0;
+    int maxtime = 100;
+    std::unordered_map<std::string, std::string> params;
+
+    Concore() {
+        iport = safe_literal_eval("concore.iport", {});
+        oport = safe_literal_eval("concore.oport", {});
+        default_maxtime(100);
+        load_params();
+    }
+
+    std::unordered_map<std::string, std::string> safe_literal_eval(const std::string& filename, std::unordered_map<std::string, std::string> defaultValue) {
+        std::ifstream file(filename);
+        if (!file) {
+            std::cerr << "Error reading " << filename << "\n";
+            return defaultValue;
+        }
+        return defaultValue;
+    }
+
+    void load_params() {
+        std::ifstream file(inpath + "/1/concore.params");
+        if (!file) return;
+        std::stringstream buffer;
+        buffer << file.rdbuf();
+        std::string sparams = buffer.str();
+
+        if (!sparams.empty() && sparams[0] == '"') {
+            sparams = sparams.substr(1, sparams.find('"') - 1);
+        }
+
+        if (!sparams.empty() && sparams[0] != '{') {
+            sparams = "{'" + std::regex_replace(std::regex_replace(std::regex_replace(sparams, std::regex(","), ", '"), std::regex("="), "':"), std::regex(" "), "") + "}";
+        }
+    }
+
+    std::string tryparam(const std::string& n, const std::string& i) {
+        return params.count(n) ? params[n] : i;
+    }
+
+    void default_maxtime(int defaultValue) {
+        maxtime = defaultValue;
+        std::ifstream file(inpath + "/1/concore.maxtime");
+        if (file) {
+            file >> maxtime;
+        }
+    }
+
+    bool unchanged() {
+        if (olds == s) {
+            s.clear();
+            return true;
+        }
+        olds = s;
+        return false;
+    }
+
+    std::vector<std::string> read(int port, const std::string& name, const std::string& initstr) {
+        std::this_thread::sleep_for(std::chrono::seconds(delay));
+        std::string file_path = inpath + std::to_string(port) + "/" + name;
+        std::ifstream infile(file_path);
+        std::string ins;
+
+        if (!infile) {
+            std::cerr << "File " << file_path << " not found, using default value.\n";
+            return {initstr};
+        }
+        std::getline(infile, ins);
+        
+        int attempts = 0, max_retries = 5;
+        while (ins.empty() && attempts < max_retries) {
+            std::this_thread::sleep_for(std::chrono::seconds(delay));
+            infile.open(file_path);
+            if (infile) std::getline(infile, ins);
+            attempts++;
+            retrycount++;
+        }
+
+        if (ins.empty()) {
+            std::cerr << "Max retries reached for " << file_path << ", using default value.\n";
+            return {initstr};
+        }
+        
+        s += ins;
+        return {ins};
+    }
+
+    void write(int port, const std::string& name, const std::vector<std::string>& val, int delta = 0) {
+        std::string file_path = outpath + std::to_string(port) + "/" + name;
+        std::ofstream outfile(file_path);
+        if (!outfile) {
+            std::cerr << "Error writing to " << file_path << "\n";
+            return;
+        }
+        if (!val.empty()) {
+            outfile << "[" << simtime + delta << ", ";
+            for (size_t i = 0; i < val.size(); ++i) {
+                outfile << val[i] << (i + 1 < val.size() ? ", " : "");
+            }
+            outfile << "]";
+            simtime += delta;
+        }
+    }
+};
+
+#endif