Sync from upstream llama.cpp repository

vendor/cpp-httplib/CMakeLists.txt

@@ -0,0 +1,160 @@
+set(TARGET cpp-httplib)
+license_add_file("cpp-httplib" "LICENSE")
+
+find_package(Threads REQUIRED)
+
+add_library(${TARGET} STATIC httplib.cpp httplib.h)
+if (NOT MSVC)
+    # disable warnings in 3rd party code
+    target_compile_options(${TARGET} PRIVATE -w)
+endif()
+
+target_link_libraries(${TARGET} PRIVATE Threads::Threads)
+
+if (WIN32 AND NOT MSVC)
+    target_link_libraries(${TARGET} PRIVATE ws2_32)
+endif()
+
+target_compile_features(${TARGET} PRIVATE cxx_std_17)
+
+target_compile_definitions(${TARGET} PRIVATE
+    # increase max payload length to allow use of larger context size
+    CPPHTTPLIB_FORM_URL_ENCODED_PAYLOAD_MAX_LENGTH=1048576
+    # increase backlog size to avoid connection resets for >> 1 slots
+    CPPHTTPLIB_LISTEN_BACKLOG=512
+    # increase max URI length to handle longer prompts in query string
+    CPPHTTPLIB_REQUEST_URI_MAX_LENGTH=32768
+    # disable Nagle's algorithm
+    CPPHTTPLIB_TCP_NODELAY=1
+)
+
+set(OPENSSL_NO_ASM ON CACHE BOOL "Disable OpenSSL ASM code when building BoringSSL or LibreSSL")
+
+if (LLAMA_BUILD_BORINGSSL)
+    set(FIPS OFF CACHE BOOL "Enable FIPS (BoringSSL)")
+
+    set(BORINGSSL_GIT "https://boringssl.googlesource.com/boringssl" CACHE STRING "BoringSSL git repository")
+    set(BORINGSSL_VERSION "0.20251002.0" CACHE STRING "BoringSSL version")
+
+    message(STATUS "Fetching BoringSSL version ${BORINGSSL_VERSION}")
+
+    set(BORINGSSL_ARGS
+        GIT_REPOSITORY ${BORINGSSL_GIT}
+        GIT_TAG        ${BORINGSSL_VERSION}
+    )
+    if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.28)
+        list(APPEND BORINGSSL_ARGS EXCLUDE_FROM_ALL)
+    endif()
+
+    include(FetchContent)
+    FetchContent_Declare(boringssl ${BORINGSSL_ARGS})
+
+    set(SAVED_BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS})
+    set(SAVED_BUILD_TESTING ${BUILD_TESTING})
+
+    set(BUILD_SHARED_LIBS OFF)
+    set(BUILD_TESTING OFF)
+
+    if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.28)
+        FetchContent_MakeAvailable(boringssl)
+    else()
+        FetchContent_GetProperties(boringssl)
+        if(NOT boringssl_POPULATED)
+            FetchContent_Populate(boringssl)
+            add_subdirectory(${boringssl_SOURCE_DIR} ${boringssl_BINARY_DIR} EXCLUDE_FROM_ALL)
+        endif()
+    endif()
+
+    set(BUILD_SHARED_LIBS ${SAVED_BUILD_SHARED_LIBS})
+    set(BUILD_TESTING ${SAVED_BUILD_TESTING})
+
+    license_add_file("BoringSSL" "${boringssl_SOURCE_DIR}/LICENSE")
+
+    set(CPPHTTPLIB_OPENSSL_SUPPORT TRUE)
+    target_link_libraries(${TARGET} PUBLIC ssl crypto)
+
+elseif (LLAMA_BUILD_LIBRESSL)
+    set(LIBRESSL_VERSION "4.2.1" CACHE STRING "LibreSSL version")
+
+    message(STATUS "Fetching LibreSSL version ${LIBRESSL_VERSION}")
+
+    set(LIBRESSL_ARGS
+        URL "https://cdn.openbsd.org/pub/OpenBSD/LibreSSL/libressl-${LIBRESSL_VERSION}.tar.gz"
+    )
+    if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.24)
+        list(APPEND LIBRESSL_ARGS DOWNLOAD_EXTRACT_TIMESTAMP TRUE)
+    endif()
+
+    if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.28)
+        list(APPEND LIBRESSL_ARGS EXCLUDE_FROM_ALL)
+    endif()
+
+    include(FetchContent)
+    FetchContent_Declare(libressl ${LIBRESSL_ARGS})
+
+    set(SAVED_BUILD_SHARED_LIBS ${BUILD_SHARED_LIBS})
+    set(SAVED_BUILD_TESTING ${BUILD_TESTING})
+
+    set(BUILD_SHARED_LIBS OFF)
+    set(BUILD_TESTING OFF)
+
+    if(CMAKE_VERSION VERSION_GREATER_EQUAL 3.28)
+        FetchContent_MakeAvailable(libressl)
+    else()
+        FetchContent_GetProperties(libressl)
+        if(NOT libressl_POPULATED)
+            FetchContent_Populate(libressl)
+            add_subdirectory(${libressl_SOURCE_DIR} ${libressl_BINARY_DIR} EXCLUDE_FROM_ALL)
+        endif()
+    endif()
+
+    set(BUILD_SHARED_LIBS ${SAVED_BUILD_SHARED_LIBS})
+    set(BUILD_TESTING ${SAVED_BUILD_TESTING})
+
+    license_add_file("LibreSSL" "${libressl_SOURCE_DIR}/COPYING")
+
+    set(CPPHTTPLIB_OPENSSL_SUPPORT TRUE)
+    target_link_libraries(${TARGET} PUBLIC ssl crypto)
+
+elseif (LLAMA_OPENSSL)
+    find_package(OpenSSL)
+    if (OpenSSL_FOUND)
+        include(CheckCSourceCompiles)
+        set(SAVED_CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES})
+        set(CMAKE_REQUIRED_INCLUDES ${OPENSSL_INCLUDE_DIR})
+        check_c_source_compiles("
+        #include <openssl/opensslv.h>
+        #if defined(OPENSSL_IS_BORINGSSL) || defined(LIBRESSL_VERSION_NUMBER)
+        #    if OPENSSL_VERSION_NUMBER < 0x1010107f
+        #        error bad version
+        #    endif
+        #else
+        #    if OPENSSL_VERSION_NUMBER < 0x30000000L
+        #        error bad version
+        #    endif
+        #endif
+        int main() { return 0; }
+        " OPENSSL_VERSION_SUPPORTED)
+        set(CMAKE_REQUIRED_INCLUDES ${SAVED_CMAKE_REQUIRED_INCLUDES})
+        if (OPENSSL_VERSION_SUPPORTED)
+            message(STATUS "OpenSSL found: ${OPENSSL_VERSION}")
+            set(CPPHTTPLIB_OPENSSL_SUPPORT TRUE)
+            target_link_libraries(${TARGET} PUBLIC OpenSSL::SSL OpenSSL::Crypto)
+        endif()
+    else()
+        message(STATUS "OpenSSL not found, SSL support disabled")
+    endif()
+endif()
+
+if (CPPHTTPLIB_OPENSSL_SUPPORT)
+    target_compile_definitions(${TARGET} PUBLIC CPPHTTPLIB_OPENSSL_SUPPORT) # used in server.cpp
+    if (APPLE AND CMAKE_SYSTEM_NAME STREQUAL "Darwin")
+        target_compile_definitions(${TARGET} PRIVATE CPPHTTPLIB_USE_CERTS_FROM_MACOSX_KEYCHAIN)
+        find_library(CORE_FOUNDATION_FRAMEWORK CoreFoundation REQUIRED)
+        find_library(SECURITY_FRAMEWORK Security REQUIRED)
+        target_link_libraries(${TARGET} PUBLIC ${CORE_FOUNDATION_FRAMEWORK} ${SECURITY_FRAMEWORK})
+    endif()
+    if (WIN32 AND NOT MSVC)
+        target_link_libraries(${TARGET} PUBLIC crypt32)
+    endif()
+endif()

vendor/cpp-httplib/LICENSE

@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2017 yhirose
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+

vendor/minja/chat-template.hpp

@@ -0,0 +1,557 @@
+/*
+    Copyright 2024 Google LLC
+
+    Use of this source code is governed by an MIT-style
+    license that can be found in the LICENSE file or at
+    https://opensource.org/licenses/MIT.
+*/
+// SPDX-License-Identifier: MIT
+#pragma once
+
+#include "minja.hpp"
+
+#include <chrono>
+#include <cstddef>
+#include <cstdio>
+#include <ctime>
+#include <exception>
+#include <iomanip>
+#include <memory>
+#include <sstream>
+#include <stdexcept>
+#include <string>
+#include <vector>
+
+#include <nlohmann/json.hpp>
+
+using json = nlohmann::ordered_json;
+
+namespace minja {
+
+struct chat_template_caps {
+    bool supports_tools = false;
+    bool supports_tool_calls = false;
+    bool supports_tool_responses = false;
+    bool supports_system_role = false;
+    bool supports_parallel_tool_calls = false;
+    bool supports_tool_call_id = false;
+    // meta-llama/Llama-3.1-8B-Instruct expects arguments to be an object.
+    // Most other templates (and OpenAI's API) expect the arguments object to be stringified.
+    bool requires_object_arguments = false;
+    // CohereForAI/c4ai-command-r-plus simple variant
+    bool requires_non_null_content = false;
+    // MiniMaxAI/MiniMax-Text-01 special
+    bool requires_typed_content = false;
+};
+
+struct chat_template_inputs {
+    nlohmann::ordered_json messages;
+    nlohmann::ordered_json tools;
+    bool add_generation_prompt = true;
+    nlohmann::ordered_json extra_context;
+    std::chrono::system_clock::time_point now = std::chrono::system_clock::now();
+};
+
+struct chat_template_options {
+    bool apply_polyfills = true;
+    bool use_bos_token = true;
+    bool use_eos_token = true;
+    bool define_strftime_now = true;
+
+    bool polyfill_tools = true;
+    bool polyfill_tool_call_examples = true;
+    bool polyfill_tool_calls = true;
+    bool polyfill_tool_responses = true;
+    bool polyfill_system_role = true;
+    bool polyfill_object_arguments = true;
+    bool polyfill_typed_content = true;
+};
+
+class chat_template {
+
+  private:
+    chat_template_caps caps_;
+    std::string source_;
+    std::string bos_token_;
+    std::string eos_token_;
+    std::shared_ptr<minja::TemplateNode> template_root_;
+    std::string tool_call_example_;
+
+    std::string try_raw_render(
+        const nlohmann::ordered_json & messages,
+        const nlohmann::ordered_json & tools,
+        bool add_generation_prompt,
+        const nlohmann::ordered_json & extra_context = nlohmann::ordered_json()) const
+    {
+        try {
+            chat_template_inputs inputs;
+            inputs.messages = messages;
+            inputs.tools = tools;
+            inputs.add_generation_prompt = add_generation_prompt;
+            inputs.extra_context = extra_context;
+            // Use fixed date for tests
+            inputs.now = std::chrono::system_clock::from_time_t(0);
+
+            chat_template_options opts;
+            opts.apply_polyfills = false;
+
+            auto prompt = apply(inputs, opts);
+            // fprintf(stderr, "try_raw_render: %s\n", prompt.c_str());
+            return prompt;
+        } catch (const std::exception & e) {
+            // fprintf(stderr, "try_raw_render error: %s\n", e.what());
+            return "";
+        }
+    }
+
+  public:
+
+    chat_template(const std::string & source, const std::string & bos_token, const std::string & eos_token)
+        : source_(source), bos_token_(bos_token), eos_token_(eos_token)
+    {
+        template_root_ = minja::Parser::parse(source_, {
+            /* .trim_blocks = */ true,
+            /* .lstrip_blocks = */ true,
+            /* .keep_trailing_newline = */ false,
+        });
+
+        auto contains = [](const std::string & haystack, const std::string & needle) {
+            return haystack.find(needle) != std::string::npos;
+        };
+
+        const std::string user_needle = "<User Needle>";
+        const std::string sys_needle = "<System Needle>";
+        const json dummy_str_user_msg = {{"role", "user"}, {"content", user_needle}};
+        const json dummy_typed_user_msg = {{"role", "user"}, {"content", json::array({{{"type", "text"}, {"text", user_needle}}})}};
+
+        caps_.requires_typed_content =
+            !contains(try_raw_render(json::array({dummy_str_user_msg}), {}, false), user_needle)
+            && contains(try_raw_render(json::array({dummy_typed_user_msg}), {}, false), user_needle);
+
+        const auto dummy_user_msg = caps_.requires_typed_content
+            ? dummy_typed_user_msg
+            : dummy_str_user_msg;
+        const json needle_system_msg = {
+            {"role", "system"},
+            {"content", caps_.requires_typed_content ? json::array({{{"type", "text"}, {"text", sys_needle}}}) : json(sys_needle)},
+        };
+
+        caps_.supports_system_role = contains(try_raw_render({needle_system_msg, dummy_user_msg,}, {}, false), sys_needle);
+
+        auto out = try_raw_render(json::array({
+            dummy_user_msg
+        }), json::array({
+            {
+                {"name", "some_tool"},
+                {"type", "function"},
+                {"function", {
+                    {"name", "some_tool"},
+                    {"description", "Some tool."},
+                    {"parameters", {
+                        {"type", "object"},
+                        {"properties", {
+                            {"arg", {
+                                {"type", "string"},
+                                {"description", "Some argument."},
+                            }},
+                        }},
+                        {"required", json::array({ "arg" })},
+                    }},
+                }},
+            },
+        }), false);
+        caps_.supports_tools = contains(out, "some_tool");
+
+        const auto render_with_content = [&](const json & content) {
+            const json assistant_msg {{"role", "assistant"}, {"content", content}};
+            // Render two assistant messages as some templates like QwQ-32B are handling
+            // the content differently depending on whether it's the last message or not
+            // (to remove the <think> tag in all but the last message).
+            return try_raw_render(json::array({dummy_user_msg, assistant_msg, dummy_user_msg, assistant_msg}), {}, false);
+        };
+        auto out_empty = render_with_content("");
+        auto out_null = render_with_content(json());
+        caps_.requires_non_null_content = contains(out_empty, user_needle) && !contains(out_null, user_needle);
+
+        json j_null;
+        auto make_tool_calls_msg = [&](const json & tool_calls) {
+            return json {
+                {"role", "assistant"},
+                {"content", caps_.requires_non_null_content? "" : j_null},
+                {"tool_calls", tool_calls},
+            };
+        };
+        auto make_tool_call = [](const std::string & tool_name, const json & arguments) {
+            return json {
+                {"id", "call_1___"},
+                {"type", "function"},
+                {"function", {
+                    {"arguments", arguments},
+                    {"name", tool_name},
+                }},
+            };
+        };
+        const json dummy_args_obj {{"argument_needle", "print('Hello, World!')"}};
+        const auto contains_arg_needle = [&](const std::string & out_str) {
+            return contains(out_str, "<parameter=argument_needle>")
+                || contains(out_str, "\"argument_needle\":")
+                || contains(out_str, "'argument_needle':")
+                || contains(out_str, ">argument_needle<")
+                || contains(out_str, "<parameter name=\"argument_needle\">");
+        };
+
+        // Note: the arguments are rendered in both cases, but may be double-escaped, which we don't want.
+        out = try_raw_render(json::array({
+            dummy_user_msg,
+            make_tool_calls_msg(json::array({make_tool_call("ipython", dummy_args_obj.dump())})),
+        }), {}, false);
+        auto tool_call_renders_str_arguments = contains_arg_needle(out);
+        out = try_raw_render(json::array({
+            dummy_user_msg,
+            make_tool_calls_msg(json::array({make_tool_call("ipython", dummy_args_obj)})),
+        }), {}, false);
+        auto tool_call_renders_obj_arguments = contains_arg_needle(out);
+
+        caps_.supports_tool_calls = tool_call_renders_str_arguments || tool_call_renders_obj_arguments;
+        caps_.requires_object_arguments = !tool_call_renders_str_arguments && tool_call_renders_obj_arguments;
+
+        if (caps_.supports_tool_calls) {
+            auto dummy_args = caps_.requires_object_arguments ? dummy_args_obj : json(dummy_args_obj.dump());
+            auto tc1 = make_tool_call("test_tool1", dummy_args);
+            auto tc2 = make_tool_call("test_tool2", dummy_args);
+            auto out = try_raw_render(json::array({
+                dummy_user_msg,
+                make_tool_calls_msg(json::array({tc1, tc2})),
+            }), {}, false);
+            caps_.supports_parallel_tool_calls = contains(out, "test_tool1") && contains(out, "test_tool2");
+
+            out = try_raw_render(json::array({
+                dummy_user_msg,
+                make_tool_calls_msg(json::array({tc1})),
+                {
+                    {"role", "tool"},
+                    {"name", "test_tool1"},
+                    {"content", "Some response!"},
+                    {"tool_call_id", "call_911_"},
+                }
+            }), {}, false);
+            caps_.supports_tool_responses = contains(out, "Some response!");
+            caps_.supports_tool_call_id = contains(out, "call_911_");
+        }
+
+        try {
+            if (!caps_.supports_tools) {
+                const json user_msg {
+                    {"role", "user"},
+                    {"content", "Hey"},
+                };
+                const json args {
+                    {"arg1", "some_value"},
+                };
+                const json tool_call_msg {
+                    {"role", "assistant"},
+                    {"content", caps_.requires_non_null_content ? "" : j_null},
+                    {"tool_calls", json::array({
+                        {
+                            // TODO: detect if requires numerical id or fixed length == 6 like Nemo
+                            {"id", "call_1___"},
+                            {"type", "function"},
+                            {"function", {
+                                {"name", "tool_name"},
+                                {"arguments", (caps_.requires_object_arguments ? args : json(minja::Value(args).dump(-1, /* to_json= */ true)))},
+                            }},
+                        },
+                    })},
+                };
+                std::string prefix, full;
+                {
+                    chat_template_inputs inputs;
+                    inputs.messages = json::array({user_msg});
+                    inputs.add_generation_prompt = true;
+                    prefix = apply(inputs);
+                }
+                {
+                    chat_template_inputs inputs;
+                    inputs.messages = json::array({user_msg, tool_call_msg});
+                    inputs.add_generation_prompt = false;
+                    full = apply(inputs);
+                }
+                auto eos_pos_last = full.rfind(eos_token_);
+                if (eos_pos_last == prefix.size() - eos_token_.size() ||
+                      (full[full.size() - 1] == '\n' && (eos_pos_last == full.size() - eos_token_.size() - 1))) {
+                    full = full.substr(0, eos_pos_last);
+                }
+                size_t common_prefix_length = 0;
+                for (size_t i = 0; i < prefix.size() && i < full.size(); ++i) {
+                    if (prefix[i] != full[i]) {
+                        break;
+                    }
+                    if (prefix[i] == '<') {
+                        // DeepSeek R1's template (as of 20250209) adds a trailing <think> if add_generation_prompt,
+                        // but it removes thinking tags for past messages.
+                        // The prefix and full strings diverge at <think> vs. <｜tool▁calls▁begin｜>, we avoid consuming the leading <.
+                        continue;
+                    }
+                    common_prefix_length = i + 1;
+                }
+                auto example = full.substr(common_prefix_length);
+                if (example.find("tool_name") == std::string::npos && example.find("some_value") == std::string::npos) {
+                    fprintf(stderr, "Failed to infer a tool call example (possible template bug)\n");
+                } else {
+                    tool_call_example_ = example;
+                }
+            }
+        } catch (const std::exception & e) {
+            fprintf(stderr, "Failed to generate tool call example: %s\n", e.what());
+        }
+    }
+
+    const std::string & source() const { return source_; }
+    const std::string & bos_token() const { return bos_token_; }
+    const std::string & eos_token() const { return eos_token_; }
+    const chat_template_caps & original_caps() const { return caps_; }
+
+    // Deprecated, please use the form with chat_template_inputs and chat_template_options
+    std::string apply(
+        const nlohmann::ordered_json & messages,
+        const nlohmann::ordered_json & tools,
+        bool add_generation_prompt,
+        const nlohmann::ordered_json & extra_context = nlohmann::ordered_json(),
+        bool apply_polyfills = true)
+    {
+        fprintf(stderr, "[%s] Deprecated!\n", __func__);
+        chat_template_inputs inputs;
+        inputs.messages = messages;
+        inputs.tools = tools;
+        inputs.add_generation_prompt = add_generation_prompt;
+        inputs.extra_context = extra_context;
+        inputs.now = std::chrono::system_clock::now();
+
+        chat_template_options opts;
+        opts.apply_polyfills = apply_polyfills;
+
+        return apply(inputs, opts);
+    }
+
+    std::string apply(
+        const chat_template_inputs & inputs,
+        const chat_template_options & opts = chat_template_options()) const
+    {
+        json actual_messages;
+
+        auto has_tools = inputs.tools.is_array() && !inputs.tools.empty();
+        auto has_tool_calls = false;
+        auto has_tool_responses = false;
+        auto has_string_content = false;
+        for (const auto & message : inputs.messages) {
+            if (message.contains("tool_calls") && !message["tool_calls"].is_null()) {
+                has_tool_calls = true;
+            }
+            if (message.contains("role") && message["role"] == "tool") {
+                has_tool_responses = true;
+            }
+            if (message.contains("content") && message["content"].is_string()) {
+                has_string_content = true;
+            }
+        }
+
+        auto polyfill_system_role = opts.polyfill_system_role && !caps_.supports_system_role;
+        auto polyfill_tools = opts.polyfill_tools && has_tools && !caps_.supports_tools;
+        auto polyfill_tool_call_example = polyfill_tools && opts.polyfill_tool_call_examples;
+        auto polyfill_tool_calls = opts.polyfill_tool_calls && has_tool_calls && !caps_.supports_tool_calls;
+        auto polyfill_tool_responses = opts.polyfill_tool_responses && has_tool_responses && !caps_.supports_tool_responses;
+        auto polyfill_object_arguments = opts.polyfill_object_arguments && has_tool_calls && caps_.requires_object_arguments;
+        auto polyfill_typed_content = opts.polyfill_typed_content && has_string_content && caps_.requires_typed_content;
+
+        auto needs_polyfills = opts.apply_polyfills && (false
+            || polyfill_system_role
+            || polyfill_tools
+            || polyfill_tool_calls
+            || polyfill_tool_responses
+            || polyfill_object_arguments
+            || polyfill_typed_content
+        );
+
+        if (needs_polyfills) {
+            actual_messages = json::array();
+
+            auto add_message = [&](const json & msg) {
+                if (polyfill_typed_content && msg.contains("content") && !msg.at("content").is_null() && msg.at("content").is_string()) {
+                    actual_messages.push_back({
+                        {"role", msg.at("role")},
+                        {"content", {{
+                            {"type", "text"},
+                            {"text", msg.at("content")},
+                        }}},
+                    });
+                } else {
+                    actual_messages.push_back(msg);
+                }
+            };
+
+            std::string pending_system;
+            auto flush_sys = [&]() {
+                if (!pending_system.empty()) {
+                    add_message({
+                        {"role", "user"},
+                        {"content", pending_system},
+                    });
+                    pending_system.clear();
+                }
+            };
+
+            json adjusted_messages;
+            if (polyfill_tools) {
+                adjusted_messages = add_system(inputs.messages,
+                    "You can call any of the following tools to satisfy the user's requests: " + minja::Value(inputs.tools).dump(2, /* to_json= */ true) +
+                    (!polyfill_tool_call_example || tool_call_example_.empty() ? "" : "\n\nExample tool call syntax:\n\n" + tool_call_example_ + "\n\n"));
+            } else {
+                adjusted_messages = inputs.messages;
+            }
+
+            for (const auto & message_ : adjusted_messages) {
+                auto message = message_;
+                if (!message.contains("role") || (!message.contains("content") && !message.contains("tool_calls"))) {
+                    throw std::runtime_error("message must have 'role' and one of 'content' or 'tool_calls' fields: " + message.dump());
+                }
+                std::string role = message.at("role");
+
+                if (message.contains("tool_calls")) {
+                    if (polyfill_object_arguments || polyfill_tool_calls) {
+                        for (auto & tool_call : message.at("tool_calls")) {
+                            if (tool_call["type"] == "function") {
+                                auto & function = tool_call.at("function");
+                                auto & arguments = function.at("arguments");
+                                if (arguments.is_string()) {
+                                    try {
+                                        arguments = json::parse(arguments.get<std::string>());
+                                    } catch (const std::exception & ecvt) {
+                                        fprintf(stderr, "Failed to parse arguments: %s\n", ecvt.what());
+                                    }
+                                }
+                            }
+                        }
+                    }
+                    if (polyfill_tool_calls) {
+                        auto tool_calls = json::array();
+                        for (const auto & tool_call : message.at("tool_calls")) {
+                            if (tool_call.at("type") != "function") {
+                                continue;
+                            }
+                            const auto & function = tool_call.at("function");
+                            auto tc = json {
+                                {"name", function.at("name")},
+                                {"arguments", function.at("arguments")},
+                            };
+                            if (tool_call.contains("id")) {
+                                tc["id"] = tool_call["id"];
+                            }
+                            tool_calls.push_back(tc);
+                        }
+                        auto obj = json {
+                            {"tool_calls", tool_calls},
+                        };
+                        if (message.contains("content")) {
+                            auto content = message.at("content");
+                            if (!content.is_null() && !content.empty()) {
+                                obj["content"] = content;
+                            }
+                        }
+                        message["content"] = obj.dump(2);
+                        message.erase("tool_calls");
+                    }
+                }
+                if (polyfill_tool_responses && role == "tool") {
+                    message["role"] = "user";
+                    auto obj = json {
+                        {"tool_response", json::object()},
+                    };
+                    if (message.contains("name")) {
+                        obj["tool_response"]["tool"] = message.at("name");
+                    }
+                    obj["tool_response"]["content"] = message.at("content");
+                    if (message.contains("tool_call_id")) {
+                        obj["tool_response"]["tool_call_id"] = message.at("tool_call_id");
+                    }
+                    message["content"] = obj.dump(2);
+                    message.erase("name");
+                }
+
+                if (!message["content"].is_null() && polyfill_system_role) {
+                    std::string content = message.at("content");
+                    if (role == "system") {
+                        if (!pending_system.empty()) pending_system += "\n";
+                        pending_system += content;
+                        continue;
+                    } else {
+                        if (role == "user") {
+                            if (!pending_system.empty()) {
+                                message["content"] = pending_system + (content.empty() ? "" : "\n" + content);
+                                pending_system.clear();
+                            }
+                        } else {
+                            flush_sys();
+                        }
+                    }
+                }
+                add_message(message);
+            }
+            flush_sys();
+        } else {
+            actual_messages = inputs.messages;
+        }
+
+        auto context = minja::Context::make(json({
+            {"messages", actual_messages},
+            {"add_generation_prompt", inputs.add_generation_prompt},
+        }));
+        context->set("bos_token", opts.use_bos_token ? bos_token_ : "");
+        context->set("eos_token", opts.use_eos_token ? eos_token_ : "");
+        if (opts.define_strftime_now) {
+            auto now = inputs.now;
+            context->set("strftime_now", Value::callable([now](const std::shared_ptr<minja::Context> &, minja::ArgumentsValue & args) {
+                args.expectArgs("strftime_now", {1, 1}, {0, 0});
+                auto format = args.args[0].get<std::string>();
+
+                auto time = std::chrono::system_clock::to_time_t(now);
+                auto local_time = *std::localtime(&time);
+                std::ostringstream ss;
+                ss << std::put_time(&local_time, format.c_str());
+                return ss.str();
+            }));
+        }
+        if (!inputs.tools.is_null()) {
+            context->set("tools", minja::Value(inputs.tools));
+        }
+        if (!inputs.extra_context.is_null()) {
+            for (auto & kv : inputs.extra_context.items()) {
+                context->set(kv.key(), minja::Value(kv.value()));
+            }
+        }
+
+        auto ret = template_root_->render(context);
+        // fprintf(stderr, "actual_messages: %s\n", actual_messages.dump(2).c_str());
+        // fprintf(stderr, "apply: %s\n\n", ret.c_str());
+        return ret;
+    }
+
+    static nlohmann::ordered_json add_system(const nlohmann::ordered_json & messages, const std::string & system_prompt) {
+        json messages_with_system = messages;
+
+        if (!messages_with_system.empty() && messages_with_system[0].at("role") == "system") {
+            std::string existing_system = messages_with_system.at(0).at("content");
+            messages_with_system[0] = json {
+                {"role", "system"},
+                {"content", existing_system + "\n\n" + system_prompt},
+            };
+        } else {
+            messages_with_system.insert(messages_with_system.begin(), json {
+                {"role", "system"},
+                {"content", system_prompt},
+            });
+        }
+        return messages_with_system;
+    }
+};
+
+}  // namespace minja

vendor/nlohmann/json_fwd.hpp

@@ -0,0 +1,187 @@
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++
+// |  |  |__   |  |  | | | |  version 3.12.0
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
+#ifndef INCLUDE_NLOHMANN_JSON_FWD_HPP_
+#define INCLUDE_NLOHMANN_JSON_FWD_HPP_
+
+#include <cstdint> // int64_t, uint64_t
+#include <map> // map
+#include <memory> // allocator
+#include <string> // string
+#include <vector> // vector
+
+// #include <nlohmann/detail/abi_macros.hpp>
+//     __ _____ _____ _____
+//  __|  |   __|     |   | |  JSON for Modern C++
+// |  |  |__   |  |  | | | |  version 3.12.0
+// |_____|_____|_____|_|___|  https://github.com/nlohmann/json
+//
+// SPDX-FileCopyrightText: 2013 - 2025 Niels Lohmann <https://nlohmann.me>
+// SPDX-License-Identifier: MIT
+
+
+
+// This file contains all macro definitions affecting or depending on the ABI
+
+#ifndef JSON_SKIP_LIBRARY_VERSION_CHECK
+    #if defined(NLOHMANN_JSON_VERSION_MAJOR) && defined(NLOHMANN_JSON_VERSION_MINOR) && defined(NLOHMANN_JSON_VERSION_PATCH)
+        #if NLOHMANN_JSON_VERSION_MAJOR != 3 || NLOHMANN_JSON_VERSION_MINOR != 12 || NLOHMANN_JSON_VERSION_PATCH != 0
+            #warning "Already included a different version of the library!"
+        #endif
+    #endif
+#endif
+
+#define NLOHMANN_JSON_VERSION_MAJOR 3   // NOLINT(modernize-macro-to-enum)
+#define NLOHMANN_JSON_VERSION_MINOR 12  // NOLINT(modernize-macro-to-enum)
+#define NLOHMANN_JSON_VERSION_PATCH 0   // NOLINT(modernize-macro-to-enum)
+
+#ifndef JSON_DIAGNOSTICS
+    #define JSON_DIAGNOSTICS 0
+#endif
+
+#ifndef JSON_DIAGNOSTIC_POSITIONS
+    #define JSON_DIAGNOSTIC_POSITIONS 0
+#endif
+
+#ifndef JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON
+    #define JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON 0
+#endif
+
+#if JSON_DIAGNOSTICS
+    #define NLOHMANN_JSON_ABI_TAG_DIAGNOSTICS _diag
+#else
+    #define NLOHMANN_JSON_ABI_TAG_DIAGNOSTICS
+#endif
+
+#if JSON_DIAGNOSTIC_POSITIONS
+    #define NLOHMANN_JSON_ABI_TAG_DIAGNOSTIC_POSITIONS _dp
+#else
+    #define NLOHMANN_JSON_ABI_TAG_DIAGNOSTIC_POSITIONS
+#endif
+
+#if JSON_USE_LEGACY_DISCARDED_VALUE_COMPARISON
+    #define NLOHMANN_JSON_ABI_TAG_LEGACY_DISCARDED_VALUE_COMPARISON _ldvcmp
+#else
+    #define NLOHMANN_JSON_ABI_TAG_LEGACY_DISCARDED_VALUE_COMPARISON
+#endif
+
+#ifndef NLOHMANN_JSON_NAMESPACE_NO_VERSION
+    #define NLOHMANN_JSON_NAMESPACE_NO_VERSION 0
+#endif
+
+// Construct the namespace ABI tags component
+#define NLOHMANN_JSON_ABI_TAGS_CONCAT_EX(a, b, c) json_abi ## a ## b ## c
+#define NLOHMANN_JSON_ABI_TAGS_CONCAT(a, b, c) \
+    NLOHMANN_JSON_ABI_TAGS_CONCAT_EX(a, b, c)
+
+#define NLOHMANN_JSON_ABI_TAGS                                       \
+    NLOHMANN_JSON_ABI_TAGS_CONCAT(                                   \
+            NLOHMANN_JSON_ABI_TAG_DIAGNOSTICS,                       \
+            NLOHMANN_JSON_ABI_TAG_LEGACY_DISCARDED_VALUE_COMPARISON, \
+            NLOHMANN_JSON_ABI_TAG_DIAGNOSTIC_POSITIONS)
+
+// Construct the namespace version component
+#define NLOHMANN_JSON_NAMESPACE_VERSION_CONCAT_EX(major, minor, patch) \
+    _v ## major ## _ ## minor ## _ ## patch
+#define NLOHMANN_JSON_NAMESPACE_VERSION_CONCAT(major, minor, patch) \
+    NLOHMANN_JSON_NAMESPACE_VERSION_CONCAT_EX(major, minor, patch)
+
+#if NLOHMANN_JSON_NAMESPACE_NO_VERSION
+#define NLOHMANN_JSON_NAMESPACE_VERSION
+#else
+#define NLOHMANN_JSON_NAMESPACE_VERSION                                 \
+    NLOHMANN_JSON_NAMESPACE_VERSION_CONCAT(NLOHMANN_JSON_VERSION_MAJOR, \
+                                           NLOHMANN_JSON_VERSION_MINOR, \
+                                           NLOHMANN_JSON_VERSION_PATCH)
+#endif
+
+// Combine namespace components
+#define NLOHMANN_JSON_NAMESPACE_CONCAT_EX(a, b) a ## b
+#define NLOHMANN_JSON_NAMESPACE_CONCAT(a, b) \
+    NLOHMANN_JSON_NAMESPACE_CONCAT_EX(a, b)
+
+#ifndef NLOHMANN_JSON_NAMESPACE
+#define NLOHMANN_JSON_NAMESPACE               \
+    nlohmann::NLOHMANN_JSON_NAMESPACE_CONCAT( \
+            NLOHMANN_JSON_ABI_TAGS,           \
+            NLOHMANN_JSON_NAMESPACE_VERSION)
+#endif
+
+#ifndef NLOHMANN_JSON_NAMESPACE_BEGIN
+#define NLOHMANN_JSON_NAMESPACE_BEGIN                \
+    namespace nlohmann                               \
+    {                                                \
+    inline namespace NLOHMANN_JSON_NAMESPACE_CONCAT( \
+                NLOHMANN_JSON_ABI_TAGS,              \
+                NLOHMANN_JSON_NAMESPACE_VERSION)     \
+    {
+#endif
+
+#ifndef NLOHMANN_JSON_NAMESPACE_END
+#define NLOHMANN_JSON_NAMESPACE_END                                     \
+    }  /* namespace (inline namespace) NOLINT(readability/namespace) */ \
+    }  // namespace nlohmann
+#endif
+
+
+/*!
+@brief namespace for Niels Lohmann
+@see https://github.com/nlohmann
+@since version 1.0.0
+*/
+NLOHMANN_JSON_NAMESPACE_BEGIN
+
+/*!
+@brief default JSONSerializer template argument
+
+This serializer ignores the template arguments and uses ADL
+([argument-dependent lookup](https://en.cppreference.com/w/cpp/language/adl))
+for serialization.
+*/
+template<typename T = void, typename SFINAE = void>
+struct adl_serializer;
+
+/// a class to store JSON values
+/// @sa https://json.nlohmann.me/api/basic_json/
+template<template<typename U, typename V, typename... Args> class ObjectType =
+         std::map,
+         template<typename U, typename... Args> class ArrayType = std::vector,
+         class StringType = std::string, class BooleanType = bool,
+         class NumberIntegerType = std::int64_t,
+         class NumberUnsignedType = std::uint64_t,
+         class NumberFloatType = double,
+         template<typename U> class AllocatorType = std::allocator,
+         template<typename T, typename SFINAE = void> class JSONSerializer =
+         adl_serializer,
+         class BinaryType = std::vector<std::uint8_t>, // cppcheck-suppress syntaxError
+         class CustomBaseClass = void>
+class basic_json;
+
+/// @brief JSON Pointer defines a string syntax for identifying a specific value within a JSON document
+/// @sa https://json.nlohmann.me/api/json_pointer/
+template<typename RefStringType>
+class json_pointer;
+
+/*!
+@brief default specialization
+@sa https://json.nlohmann.me/api/json/
+*/
+using json = basic_json<>;
+
+/// @brief a minimal map-like container that preserves insertion order
+/// @sa https://json.nlohmann.me/api/ordered_map/
+template<class Key, class T, class IgnoredLess, class Allocator>
+struct ordered_map;
+
+/// @brief specialization that maintains the insertion order of object keys
+/// @sa https://json.nlohmann.me/api/ordered_json/
+using ordered_json = basic_json<nlohmann::ordered_map>;
+
+NLOHMANN_JSON_NAMESPACE_END
+
+#endif  // INCLUDE_NLOHMANN_JSON_FWD_HPP_