diff --git a/cmake/common/targets/clang-format.config b/.clang-format
similarity index 100%
rename from cmake/common/targets/clang-format.config
rename to .clang-format
diff --git a/.clang-tidy b/.clang-tidy
new file mode 100644
index 000000000..faf7bcf01
--- /dev/null
+++ b/.clang-tidy
@@ -0,0 +1,20 @@
+---
+# See https://clang.llvm.org/extra/clang-tidy/index.html
+# First disable all default checks (with -*)
+Checks: '-*,
+          modernize-*'
+# TODO(bavulapati): iterate through the rules and enable them incrementally inorder to send smaller PRs
+          # bugprone-*,-bugprone-branch-clone,-bugprone-easily-swappable-parameters,-bugprone-empty-catch,
+          # clang-analyzer-*,
+          # clang-diagnostic-*,
+          # modernize-*,
+          # concurrency-*,
+          # cppcoreguidelines-*,-cppcoreguidelines-rvalue-reference-param-not-moved,
+          # performance-*,-performance-enum-size,
+          # portability-*,
+          # objc-*,
+          # misc-*,-misc-no-recursion,-misc-unused-parameters,-misc-const-correctness'
+WarningsAsErrors: '*'
+FormatStyle: none
+UseColor: true
+SystemHeaders: false
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 8d8aa7586..95fab6b00 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -161,3 +161,24 @@ jobs:
           alert-threshold: '5%'
           comment-always: true
           fail-on-alert: false
+
+  clang-tidy:
+    runs-on: ubuntu-latest
+    env:
+      CC: clang
+      CXX: clang++
+    steps:
+      - uses: actions/checkout@v4
+      - run: cmake --version
+      - name: Install llvm
+        run: sudo apt update && sudo apt install llvm
+      - run: >
+          cmake -S . -B ./build
+          -DCMAKE_BUILD_TYPE:STRING=Release
+          -DSOURCEMETA_CORE_TESTS:BOOL=OFF
+          -DSOURCEMETA_CORE_BENCHMARK:BOOL=OFF
+          -DSOURCEMETA_CORE_DOCS:BOOL=OFF
+          -DBUILD_SHARED_LIBS:BOOL=OFF
+          -DCMAKE_COMPILE_WARNING_AS_ERROR:BOOL=ON
+          -DSOURCEMETA_CORE_CLANG_TIDY:BOOL=ON
+      - run: cmake --build ./build --config Release
diff --git a/CMakeLists.txt b/CMakeLists.txt
index ce03c9756..4e91f8c34 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,6 +25,7 @@ option(SOURCEMETA_CORE_CONTRIB_ZLIB "Build the ZLIB library for downstream consu
 option(SOURCEMETA_CORE_CONTRIB_BEARSSL "Build the BearSSL library for downstream consumers" OFF)
 option(SOURCEMETA_CORE_CONTRIB_GOOGLETEST "Build the GoogleTest library for downstream consumers" OFF)
 option(SOURCEMETA_CORE_CONTRIB_GOOGLEBENCHMARK "Build the GoogleBenchmark library for downstream consumers" OFF)
+option(SOURCEMETA_CORE_CLANG_TIDY "Run clang-tidy checks" OFF)
 
 include(Sourcemeta)
 
@@ -33,6 +34,10 @@ if(PROJECT_IS_TOP_LEVEL)
   sourcemeta_enable_simd()
 endif()
 
+if(SOURCEMETA_CORE_CLANG_TIDY)
+  sourcemeta_set_clang_tidy_config(HEADER_FILTER "${PROJECT_SOURCE_DIR}/src/*")
+endif()
+
 # TODO: Turn this into a re-usable utility CMake function
 if(SOURCEMETA_CORE_INSTALL)
   include(GNUInstallDirs)
@@ -120,7 +125,6 @@ if(PROJECT_IS_TOP_LEVEL)
     src/*.h src/*.cc
     benchmark/*.h benchmark/*.cc
     test/*.h test/*.cc)
-  sourcemeta_target_clang_tidy(SOURCES src/*.cc)
 endif()
 
 # Testing
diff --git a/Makefile b/Makefile
index d447bd57a..9c166e3fd 100644
--- a/Makefile
+++ b/Makefile
@@ -25,9 +25,6 @@ compile: .always
 	$(CMAKE) --install ./build --prefix ./build/dist --config $(PRESET) --verbose \
 		--component sourcemeta_core_dev
 
-lint: .always
-	$(CMAKE) --build ./build --config $(PRESET) --target clang_tidy
-
 test: .always
 	$(CMAKE) -E env UBSAN_OPTIONS=print_stacktrace=1 \
 		$(CTEST) --test-dir ./build --build-config $(PRESET) \
diff --git a/cmake/common/targets/clang-format.cmake b/cmake/common/targets/clang-format.cmake
index 55fbb6cdc..5aee2edea 100644
--- a/cmake/common/targets/clang-format.cmake
+++ b/cmake/common/targets/clang-format.cmake
@@ -101,7 +101,7 @@ function(sourcemeta_target_clang_format)
   file(GLOB_RECURSE SOURCEMETA_TARGET_CLANG_FORMAT_FILES
     ${SOURCEMETA_TARGET_CLANG_FORMAT_SOURCES})
 
-  set(CLANG_FORMAT_CONFIG "${CMAKE_CURRENT_FUNCTION_LIST_DIR}/clang-format.config")
+  set(CLANG_FORMAT_CONFIG "${PROJECT_SOURCE_DIR}/.clang-format")
   if(CMAKE_SYSTEM_NAME STREQUAL "MSYS")
     # Because `clang-format` is typically a Windows `.exe`, transform the path accordingly
     execute_process(COMMAND cygpath -w "${CLANG_FORMAT_CONFIG}"
diff --git a/cmake/common/targets/clang-tidy.cmake b/cmake/common/targets/clang-tidy.cmake
index 47954d1d0..958c4e139 100644
--- a/cmake/common/targets/clang-tidy.cmake
+++ b/cmake/common/targets/clang-tidy.cmake
@@ -1,130 +1,18 @@
-function(sourcemeta_target_clang_tidy_attempt_install)
-  cmake_parse_arguments(SOURCEMETA_TARGET_CLANG_TIDY_ATTEMPT_INSTALL "" "OUTPUT_DIRECTORY" "" ${ARGN})
-  if(NOT SOURCEMETA_TARGET_CLANG_TIDY_ATTEMPT_INSTALL_OUTPUT_DIRECTORY)
-    message(FATAL_ERROR "You must pass the output directory in the OUTPUT_DIRECTORY option")
-  endif()
-
-  # See https://pypi.org/project/clang-tidy/
-  set(CLANG_TIDY_BINARY_VERSION "20.1.0")
-  set(CLANG_TIDY_BINARY_Windows_AMD64 "clang_tidy-${CLANG_TIDY_BINARY_VERSION}-py2.py3-none-win_amd64.whl")
-  set(CLANG_TIDY_BINARY_MSYS_x86_64 "clang_tidy-${CLANG_TIDY_BINARY_VERSION}-py2.py3-none-win_amd64.whl")
-  set(CLANG_TIDY_BINARY_Darwin_arm64 "clang_tidy-${CLANG_TIDY_BINARY_VERSION}-py2.py3-none-macosx_11_0_arm64.whl")
-  set(CLANG_TIDY_BINARY_Darwin_x86_64 "clang_tidy-${CLANG_TIDY_BINARY_VERSION}-py2.py3-none-macosx_10_9_x86_64.whl")
-  set(CLANG_TIDY_BINARY_Linux_aarch64 "clang_tidy-${CLANG_TIDY_BINARY_VERSION}-py2.py3-none-manylinux_2_17_aarch64.manylinux2014_aarch64.whl")
-  set(CLANG_TIDY_BINARY_Linux_x86_64 "clang_tidy-${CLANG_TIDY_BINARY_VERSION}-py2.py3-none-manylinux_2_17_x86_64.manylinux2014_x86_64.whl")
-  set(CLANG_TIDY_BINARY_CHECKSUM_Windows_AMD64 "02/f0/dd985d9d9b76f8c39f1995aa475d8d5aabbea0d3e0cf498df44dc7bf1cb0")
-  set(CLANG_TIDY_BINARY_CHECKSUM_MSYS_x86_64 "02/f0/dd985d9d9b76f8c39f1995aa475d8d5aabbea0d3e0cf498df44dc7bf1cb0")
-  set(CLANG_TIDY_BINARY_CHECKSUM_Darwin_arm64 "95/02/838baf08764b08327322096bda55e8d1e2344e4a13b9308e5642cfaafd8e")
-  set(CLANG_TIDY_BINARY_CHECKSUM_Darwin_x86_64 "6d/5b/dcfc84b895d8544e00186738ca85132bbd14db4d11dbe39502630ece5391")
-  set(CLANG_TIDY_BINARY_CHECKSUM_Linux_aarch64 "be/61/9e1a0797639e81c41d38d7b8b2508a9be4b05b9a23baa9d64e7284d07238")
-  set(CLANG_TIDY_BINARY_CHECKSUM_Linux_x86_64 "52/76/42c61be1c1fdf8bacdbb265f0cd3e11321fee7362f91fa840717a6a41ad6")
-  set(CLANG_TIDY_BINARY_NAME_Windows_AMD64 "clang-tidy.exe")
-  set(CLANG_TIDY_BINARY_NAME_MSYS_x86_64 "clang-tidy.exe")
-  set(CLANG_TIDY_BINARY_NAME_Darwin_arm64 "clang-tidy")
-  set(CLANG_TIDY_BINARY_NAME_Darwin_x86_64 "clang-tidy")
-  set(CLANG_TIDY_BINARY_NAME_Linux_aarch64 "clang-tidy")
-  set(CLANG_TIDY_BINARY_NAME_Linux_x86_64 "clang-tidy")
-
-  # Determine the pre-built binary URL
-  string(REPLACE "." "_" CLANG_TIDY_BINARY_SYSTEM "${CMAKE_SYSTEM_NAME}")
-  string(REPLACE "." "_" CLANG_TIDY_BINARY_ARCH "${CMAKE_SYSTEM_PROCESSOR}")
-  set(CLANG_TIDY_BINARY_URL_VAR "CLANG_TIDY_BINARY_${CLANG_TIDY_BINARY_SYSTEM}_${CLANG_TIDY_BINARY_ARCH}")
-  set(CLANG_TIDY_BINARY_CHECKSUM_VAR "CLANG_TIDY_BINARY_CHECKSUM_${CLANG_TIDY_BINARY_SYSTEM}_${CLANG_TIDY_BINARY_ARCH}")
-  set(CLANG_TIDY_BINARY_NAME_VAR "CLANG_TIDY_BINARY_NAME_${CLANG_TIDY_BINARY_SYSTEM}_${CLANG_TIDY_BINARY_ARCH}")
-  if(NOT DEFINED ${CLANG_TIDY_BINARY_URL_VAR} OR "${${CLANG_TIDY_BINARY_URL_VAR}}" STREQUAL "")
-    message(WARNING "Skipping `clang-tidy` download. No known pre-build binary URL")
-    return()
-  elseif(NOT DEFINED ${CLANG_TIDY_BINARY_CHECKSUM_VAR} OR "${${CLANG_TIDY_BINARY_CHECKSUM_VAR}}" STREQUAL "")
-    message(FATAL_ERROR "No known `clang-tidy` pre-build binary checksum")
-  elseif(NOT DEFINED ${CLANG_TIDY_BINARY_NAME_VAR} OR "${${CLANG_TIDY_BINARY_NAME_VAR}}" STREQUAL "")
-    message(FATAL_ERROR "No known `clang-tidy` pre-build binary name")
-  endif()
-  set(CLANG_TIDY_BINARY_URL "https://files.pythonhosted.org/packages/${${CLANG_TIDY_BINARY_CHECKSUM_VAR}}/${${CLANG_TIDY_BINARY_URL_VAR}}")
-
-  # Download and extract the pre-built binary ZIP if needed
-  set(CLANG_TIDY_BINARY_NAME "${${CLANG_TIDY_BINARY_NAME_VAR}}")
-  set(CLANG_TIDY_BINARY_OUTPUT "${SOURCEMETA_TARGET_CLANG_TIDY_ATTEMPT_INSTALL_OUTPUT_DIRECTORY}/${CLANG_TIDY_BINARY_NAME}")
-  if(EXISTS "${CLANG_TIDY_BINARY_OUTPUT}")
-    message(STATUS "Found existing `clang-tidy` pre-built binary at ${CLANG_TIDY_BINARY_OUTPUT}")
-    return()
-  endif()
-  set(CLANG_TIDY_BINARY_DOWNLOAD_DIR "${CMAKE_CURRENT_BINARY_DIR}/clang-tidy")
-  file(REMOVE_RECURSE "${CLANG_TIDY_BINARY_DOWNLOAD_DIR}")
-  file(MAKE_DIRECTORY "${CLANG_TIDY_BINARY_DOWNLOAD_DIR}")
-  set(CLANG_TIDY_BINARY_WHEEL "${CLANG_TIDY_BINARY_DOWNLOAD_DIR}/clang-tidy.whl")
-  message(STATUS "Downloading `clang-tidy` pre-built binary from ${CLANG_TIDY_BINARY_URL}")
-  file(DOWNLOAD "${CLANG_TIDY_BINARY_URL}" "${CLANG_TIDY_BINARY_WHEEL}"
-    STATUS CLANG_TIDY_BINARY_DOWNLOAD_STATUS SHOW_PROGRESS TLS_VERIFY ON
-    LOG CLANG_TIDY_BINARY_DOWNLOAD_LOG)
-  list(GET CLANG_TIDY_BINARY_DOWNLOAD_STATUS 0 _code)
-  if(NOT _code EQUAL 0)
-    message(WARNING "Failed to download the `clang-tidy` pre-built binary")
-    message(WARNING "${CLANG_TIDY_BINARY_DOWNLOAD_LOG}")
-    file(REMOVE_RECURSE "${CLANG_TIDY_BINARY_DOWNLOAD_DIR}")
-    return()
-  endif()
-  set(CLANG_TIDY_BINARY_EXTRACT_DIR "${CLANG_TIDY_BINARY_DOWNLOAD_DIR}/extracted")
-  file(MAKE_DIRECTORY "${CLANG_TIDY_BINARY_EXTRACT_DIR}")
-  file(ARCHIVE_EXTRACT INPUT "${CLANG_TIDY_BINARY_WHEEL}" DESTINATION "${CLANG_TIDY_BINARY_EXTRACT_DIR}")
-
-  # Install the binary
-  file(MAKE_DIRECTORY "${SOURCEMETA_TARGET_CLANG_TIDY_ATTEMPT_INSTALL_OUTPUT_DIRECTORY}")
-  file(COPY "${CLANG_TIDY_BINARY_EXTRACT_DIR}/clang_tidy/data/bin/${CLANG_TIDY_BINARY_NAME}"
-       DESTINATION "${SOURCEMETA_TARGET_CLANG_TIDY_ATTEMPT_INSTALL_OUTPUT_DIRECTORY}")
-  file(CHMOD "${CLANG_TIDY_BINARY_OUTPUT}" PERMISSIONS
-       OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE)
-  message(STATUS "Installed `clang-tidy` pre-built binary to ${CLANG_TIDY_BINARY_OUTPUT}")
-endfunction()
-
-function(sourcemeta_target_clang_tidy)
-  cmake_parse_arguments(SOURCEMETA_TARGET_CLANG_TIDY "REQUIRED" "" "SOURCES" ${ARGN})
-  sourcemeta_target_clang_tidy_attempt_install(OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/bin")
-
-  if(SOURCEMETA_TARGET_CLANG_TIDY_REQUIRED)
-    find_program(CLANG_TIDY_BIN NAMES clang-tidy NO_DEFAULT_PATH
-      PATHS "${CMAKE_CURRENT_BINARY_DIR}/bin")
-    if(NOT CLANG_TIDY_BIN)
-      find_program(CLANG_TIDY_BIN NAMES clang-tidy REQUIRED)
-    endif()
+function(sourcemeta_find_clang_tidy)
+  if(CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+    find_program(CLANG_TIDY_BIN NAMES clang-tidy REQUIRED)
   else()
-    find_program(CLANG_TIDY_BIN NAMES clang-tidy NO_DEFAULT_PATH
-      PATHS "${CMAKE_CURRENT_BINARY_DIR}/bin")
-    if(NOT CLANG_TIDY_BIN)
-      find_program(CLANG_TIDY_BIN NAMES clang-tidy)
-    endif()
-  endif()
-
-
-  # This covers the empty list too
-  if(NOT SOURCEMETA_TARGET_CLANG_TIDY_SOURCES)
-    message(FATAL_ERROR "You must pass file globs to analyze in the SOURCES option")
+    message(FATAL_ERROR "Incompatible compiler toolchain. Clang-tidy is only tested to be working with clang toolchain")
   endif()
-  file(GLOB_RECURSE SOURCEMETA_TARGET_CLANG_TIDY_FILES
-    ${SOURCEMETA_TARGET_CLANG_TIDY_SOURCES})
 
-  set(CLANG_TIDY_CONFIG "${CMAKE_CURRENT_FUNCTION_LIST_DIR}/clang-tidy.config")
-
-  if(CMAKE_SYSTEM_NAME STREQUAL "MSYS")
-    # Because `clang-tidy` is typically a Windows `.exe`, transform the path accordingly
-    execute_process(COMMAND cygpath -w "${CLANG_TIDY_CONFIG}"
-      OUTPUT_VARIABLE CLANG_TIDY_CONFIG OUTPUT_STRIP_TRAILING_WHITESPACE)
-  endif()
+endfunction()
 
-  if(CLANG_TIDY_BIN)
-    add_custom_target(clang_tidy
-      WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
-      VERBATIM
-      COMMAND "${CLANG_TIDY_BIN}" -p "${PROJECT_BINARY_DIR}"
-        --config-file "${CLANG_TIDY_CONFIG}"
-        ${SOURCEMETA_TARGET_CLANG_TIDY_FILES}
-        COMMENT "Analyzing sources using ClangTidy")
-  else()
-    add_custom_target(clang_tidy
-      WORKING_DIRECTORY "${PROJECT_SOURCE_DIR}"
-      VERBATIM
-      COMMAND "${CMAKE_COMMAND}" -E echo "Could not locate ClangTidy"
-      COMMAND "${CMAKE_COMMAND}" -E false)
+function(sourcemeta_set_clang_tidy_config)
+  cmake_parse_arguments(SOURCEMETA_SET_CLANG_TIDY_CONFIG "" "HEADER_FILTER" "" ${ARGN})
+  if(NOT SOURCEMETA_SET_CLANG_TIDY_CONFIG_HEADER_FILTER)
+    message(FATAL_ERROR "HEADER_FILTER is required for clang-tidy.")
   endif()
 
-  set_target_properties(clang_tidy PROPERTIES FOLDER "Linting")
+  sourcemeta_find_clang_tidy()
+  set(SOURCEMETA_CXX_CLANG_TIDY "${CLANG_TIDY_BIN};--config-file=${PROJECT_SOURCE_DIR}/.clang-tidy;-header-filter=${SOURCEMETA_SET_CLANG_TIDY_CONFIG_HEADER_FILTER}" PARENT_SCOPE)
 endfunction()
diff --git a/cmake/common/targets/clang-tidy.config b/cmake/common/targets/clang-tidy.config
deleted file mode 100644
index a7de0a47b..000000000
--- a/cmake/common/targets/clang-tidy.config
+++ /dev/null
@@ -1,22 +0,0 @@
----
-# See https://clang.llvm.org/extra/clang-tidy/index.html
-# First disable all default checks (with -*)
-Checks: '-*,
-          bugprone-*,-bugprone-branch-clone,-bugprone-easily-swappable-parameters,-bugprone-empty-catch,
-          clang-analyzer-*,
-          clang-diagnostic-*,
-          modernize-*,
-          concurrency-*,
-          cppcoreguidelines-*,-cppcoreguidelines-rvalue-reference-param-not-moved,
-          performance-*,-performance-enum-size,
-          portability-*,
-          objc-*,
-          misc-*,-misc-no-recursion,-misc-unused-parameters,-misc-const-correctness'
-WarningsAsErrors: '*'
-HeaderFilterRegex: ''
-FormatStyle: none
-CheckOptions:
-  # See https://clang.llvm.org/extra/clang-tidy/checks/misc/include-cleaner.html
-  # Otherwise ClangTidy wants us to directly include private headers from our modules
-  - key: misc-include-cleaner.IgnoreHeaders
-    value: 'src\/core\/.*;uriparser\/.*'
diff --git a/cmake/common/targets/library.cmake b/cmake/common/targets/library.cmake
index e2f2ebe60..e5b0957d1 100644
--- a/cmake/common/targets/library.cmake
+++ b/cmake/common/targets/library.cmake
@@ -1,6 +1,6 @@
 function(sourcemeta_library)
   cmake_parse_arguments(SOURCEMETA_LIBRARY ""
-    "NAMESPACE;PROJECT;NAME;VARIANT" "PRIVATE_HEADERS;SOURCES" ${ARGN})
+    "NAMESPACE;PROJECT;NAME;VARIANT" "PRIVATE_HEADERS;SOURCES;CLANG_TIDY" ${ARGN})
 
   if(NOT SOURCEMETA_LIBRARY_PROJECT)
     message(FATAL_ERROR "You must pass the project name using the PROJECT option")
@@ -115,6 +115,13 @@ function(sourcemeta_library)
     target_include_directories(${TARGET_NAME}
       PUBLIC "$<BUILD_INTERFACE:${CMAKE_CURRENT_BINARY_DIR}/include>")
   endif()
+
+  if(SOURCEMETA_LIBRARY_CLANG_TIDY)
+    message(STATUS "setting CXX_CLANG_TIDY target property to ${SOURCEMETA_LIBRARY_CLANG_TIDY} on ${TARGET_NAME}")
+    set_target_properties(${TARGET_NAME}
+      PROPERTIES
+        CXX_CLANG_TIDY "${SOURCEMETA_LIBRARY_CLANG_TIDY}")
+  endif()
 endfunction()
 
 function(sourcemeta_library_install)
diff --git a/src/core/json/include/sourcemeta/core/json_array.h b/src/core/json/include/sourcemeta/core/json_array.h
index 5772abac5..d43fdc459 100644
--- a/src/core/json/include/sourcemeta/core/json_array.h
+++ b/src/core/json/include/sourcemeta/core/json_array.h
@@ -56,31 +56,39 @@ template <typename Value> class JSONArray {
   /// Get a mutable end iterator on the array
   auto end() noexcept -> iterator { return this->data.end(); }
   /// Get a constant begin iterator on the array
-  auto begin() const noexcept -> const_iterator { return this->data.begin(); }
+  [[nodiscard]] auto begin() const noexcept -> const_iterator {
+    return this->data.begin();
+  }
   /// Get a constant end iterator on the array
-  auto end() const noexcept -> const_iterator { return this->data.end(); }
+  [[nodiscard]] auto end() const noexcept -> const_iterator {
+    return this->data.end();
+  }
   /// Get a constant begin iterator on the array
-  auto cbegin() const noexcept -> const_iterator { return this->data.cbegin(); }
+  [[nodiscard]] auto cbegin() const noexcept -> const_iterator {
+    return this->data.cbegin();
+  }
   /// Get a constant end iterator on the array
-  auto cend() const noexcept -> const_iterator { return this->data.cend(); }
+  [[nodiscard]] auto cend() const noexcept -> const_iterator {
+    return this->data.cend();
+  }
   /// Get a mutable reverse begin iterator on the array
   auto rbegin() noexcept -> reverse_iterator { return this->data.rbegin(); }
   /// Get a mutable reverse end iterator on the array
   auto rend() noexcept -> reverse_iterator { return this->data.rend(); }
   /// Get a constant reverse begin iterator on the array
-  auto rbegin() const noexcept -> const_reverse_iterator {
+  [[nodiscard]] auto rbegin() const noexcept -> const_reverse_iterator {
     return this->data.rbegin();
   }
   /// Get a constant reverse end iterator on the array
-  auto rend() const noexcept -> const_reverse_iterator {
+  [[nodiscard]] auto rend() const noexcept -> const_reverse_iterator {
     return this->data.rend();
   }
   /// Get a constant reverse begin iterator on the array
-  auto crbegin() const noexcept -> const_reverse_iterator {
+  [[nodiscard]] auto crbegin() const noexcept -> const_reverse_iterator {
     return this->data.crbegin();
   }
   /// Get a constant reverse end iterator on the array
-  auto crend() const noexcept -> const_reverse_iterator {
+  [[nodiscard]] auto crend() const noexcept -> const_reverse_iterator {
     return this->data.crend();
   }
 
diff --git a/src/core/json/include/sourcemeta/core/json_hash.h b/src/core/json/include/sourcemeta/core/json_hash.h
index 14bfe9b35..e4da63e38 100644
--- a/src/core/json/include/sourcemeta/core/json_hash.h
+++ b/src/core/json/include/sourcemeta/core/json_hash.h
@@ -14,7 +14,7 @@ template <typename T> struct HashJSON {
     return value.fast_hash();
   }
 
-  inline auto is_perfect(const hash_type) const noexcept -> bool {
+  [[nodiscard]] inline auto is_perfect(const hash_type) const noexcept -> bool {
     return false;
   }
 };
@@ -45,7 +45,8 @@ template <typename T> struct PropertyHashJSON {
     }
   };
 
-  inline auto perfect(const T &value, const std::size_t size) const noexcept
+  [[nodiscard]] inline auto perfect(const T &value,
+                                    const std::size_t size) const noexcept
       -> hash_type {
     hash_type result;
     assert(!value.empty());
@@ -134,7 +135,8 @@ template <typename T> struct PropertyHashJSON {
     }
   }
 
-  inline auto is_perfect(const hash_type &hash) const noexcept -> bool {
+  [[nodiscard]] inline auto is_perfect(const hash_type &hash) const noexcept
+      -> bool {
     // If there is anything written past the first byte,
     // then it is a perfect hash
     return hash.a > 255;
diff --git a/src/core/json/include/sourcemeta/core/json_object.h b/src/core/json/include/sourcemeta/core/json_object.h
index c14d6ba9c..0b8f39e0f 100644
--- a/src/core/json/include/sourcemeta/core/json_object.h
+++ b/src/core/json/include/sourcemeta/core/json_object.h
@@ -46,12 +46,21 @@ template <typename Key, typename Value, typename Hash> class FlatMap {
     }
   }
 
-  auto begin() const noexcept -> const_iterator { return this->data.begin(); }
-  auto end() const noexcept -> const_iterator { return this->data.end(); }
-  auto cbegin() const noexcept -> const_iterator { return this->data.cbegin(); }
-  auto cend() const noexcept -> const_iterator { return this->data.cend(); }
+  [[nodiscard]] auto begin() const noexcept -> const_iterator {
+    return this->data.begin();
+  }
+  [[nodiscard]] auto end() const noexcept -> const_iterator {
+    return this->data.end();
+  }
+  [[nodiscard]] auto cbegin() const noexcept -> const_iterator {
+    return this->data.cbegin();
+  }
+  [[nodiscard]] auto cend() const noexcept -> const_iterator {
+    return this->data.cend();
+  }
 
-  inline auto hash(const key_type &key) const noexcept -> hash_type {
+  [[nodiscard]] inline auto hash(const key_type &key) const noexcept
+      -> hash_type {
     return this->hasher(key);
   }
 
@@ -102,7 +111,8 @@ template <typename Key, typename Value, typename Hash> class FlatMap {
   }
 
   // As a performance optimisation if the hash is known
-  inline auto find(const key_type &key, const hash_type key_hash) const
+  [[nodiscard]] inline auto find(const key_type &key,
+                                 const hash_type key_hash) const
       -> const_iterator {
     assert(this->hash(key) == key_hash);
 
@@ -129,7 +139,8 @@ template <typename Key, typename Value, typename Hash> class FlatMap {
     return this->cend();
   }
 
-  inline auto try_at(const key_type &key, const hash_type key_hash) const
+  [[nodiscard]] inline auto try_at(const key_type &key,
+                                   const hash_type key_hash) const
       -> const mapped_type * {
     assert(this->hash(key) == key_hash);
 
@@ -153,7 +164,8 @@ template <typename Key, typename Value, typename Hash> class FlatMap {
   }
 
   // As a performance optimisation if the hash is known
-  auto contains(const key_type &key, const hash_type key_hash) const -> bool {
+  [[nodiscard]] auto contains(const key_type &key,
+                              const hash_type key_hash) const -> bool {
     assert(this->hash(key) == key_hash);
 
     // Move the perfect hash condition out of the loop for extra performance
@@ -176,7 +188,8 @@ template <typename Key, typename Value, typename Hash> class FlatMap {
 
   // As a performance optimisation if the hash is known
 
-  inline auto at(const key_type &key, const hash_type key_hash) const
+  [[nodiscard]] inline auto at(const key_type &key,
+                               const hash_type key_hash) const
       -> const mapped_type & {
     assert(this->hash(key) == key_hash);
 
@@ -230,7 +243,8 @@ template <typename Key, typename Value, typename Hash> class FlatMap {
 #endif
   }
 
-  inline auto at(const size_type index) const noexcept -> const Entry & {
+  [[nodiscard]] inline auto at(const size_type index) const noexcept
+      -> const Entry & {
     return this->data[index];
   }
 
@@ -285,9 +299,13 @@ template <typename Key, typename Value, typename Hash> class FlatMap {
     return this->erase(key, this->hash(key));
   }
 
-  inline auto size() const noexcept -> size_type { return this->data.size(); }
+  [[nodiscard]] inline auto size() const noexcept -> size_type {
+    return this->data.size();
+  }
 
-  inline auto empty() const noexcept -> bool { return this->data.empty(); }
+  [[nodiscard]] inline auto empty() const noexcept -> bool {
+    return this->data.empty();
+  }
 
   inline auto clear() noexcept -> void { this->data.clear(); }
 
@@ -386,44 +404,48 @@ template <typename Key, typename Value, typename Hash> class JSONObject {
   using const_pointer = typename Container::const_pointer;
   using const_iterator = typename Container::const_iterator;
 
-  inline auto begin() const noexcept -> const_iterator {
+  [[nodiscard]] inline auto begin() const noexcept -> const_iterator {
     return this->data.begin();
   }
   /// Get a constant end iterator on the object
-  inline auto end() const noexcept -> const_iterator {
+  [[nodiscard]] inline auto end() const noexcept -> const_iterator {
     return this->data.end();
   }
   /// Get a constant begin iterator on the object
-  inline auto cbegin() const noexcept -> const_iterator {
+  [[nodiscard]] inline auto cbegin() const noexcept -> const_iterator {
     return this->data.cbegin();
   }
   /// Get a constant end iterator on the object
-  inline auto cend() const noexcept -> const_iterator {
+  [[nodiscard]] inline auto cend() const noexcept -> const_iterator {
     return this->data.cend();
   }
 
   /// Attempt to find an entry by key
-  inline auto find(const Key &key) const -> const_iterator {
+  [[nodiscard]] inline auto find(const Key &key) const -> const_iterator {
     return this->data.find(key, this->data.hash(key));
   }
 
   /// Check if an entry with the given key exists
-  inline auto defines(const Key &key,
-                      const typename Container::hash_type hash) const -> bool {
+  [[nodiscard]] inline auto
+  defines(const Key &key, const typename Container::hash_type hash) const
+      -> bool {
     return this->data.contains(key, hash);
   }
 
   /// Check the size of the object
-  inline auto size() const -> std::size_t { return this->data.size(); }
+  [[nodiscard]] inline auto size() const -> std::size_t {
+    return this->data.size();
+  }
 
   /// Access an object entry by its underlying positional index
-  inline auto at(const size_type index) const noexcept -> const
+  [[nodiscard]] inline auto at(const size_type index) const noexcept -> const
       typename Container::Entry & {
     return this->data.at(index);
   }
 
   // Hash an object property
-  inline auto hash(const Key &property) const -> typename Container::hash_type {
+  [[nodiscard]] inline auto hash(const Key &property) const ->
+      typename Container::hash_type {
     return this->data.hasher(property);
   }
 
diff --git a/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_pointer.h b/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_pointer.h
index 6c89f85fc..23dc47073 100644
--- a/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_pointer.h
+++ b/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_pointer.h
@@ -68,31 +68,39 @@ template <typename PropertyT, typename Hash> class GenericPointer {
   /// Get a mutable end iterator on the pointer
   auto end() noexcept -> iterator { return this->data.end(); }
   /// Get a constant begin iterator on the pointer
-  auto begin() const noexcept -> const_iterator { return this->data.begin(); }
+  [[nodiscard]] auto begin() const noexcept -> const_iterator {
+    return this->data.begin();
+  }
   /// Get a constant end iterator on the pointer
-  auto end() const noexcept -> const_iterator { return this->data.end(); }
+  [[nodiscard]] auto end() const noexcept -> const_iterator {
+    return this->data.end();
+  }
   /// Get a constant begin iterator on the pointer
-  auto cbegin() const noexcept -> const_iterator { return this->data.cbegin(); }
+  [[nodiscard]] auto cbegin() const noexcept -> const_iterator {
+    return this->data.cbegin();
+  }
   /// Get a constant end iterator on the pointer
-  auto cend() const noexcept -> const_iterator { return this->data.cend(); }
+  [[nodiscard]] auto cend() const noexcept -> const_iterator {
+    return this->data.cend();
+  }
   /// Get a mutable reverse begin iterator on the pointer
   auto rbegin() noexcept -> reverse_iterator { return this->data.rbegin(); }
   /// Get a mutable reverse end iterator on the pointer
   auto rend() noexcept -> reverse_iterator { return this->data.rend(); }
   /// Get a constant reverse begin iterator on the pointer
-  auto rbegin() const noexcept -> const_reverse_iterator {
+  [[nodiscard]] auto rbegin() const noexcept -> const_reverse_iterator {
     return this->data.rbegin();
   }
   /// Get a constant reverse end iterator on the pointer
-  auto rend() const noexcept -> const_reverse_iterator {
+  [[nodiscard]] auto rend() const noexcept -> const_reverse_iterator {
     return this->data.rend();
   }
   /// Get a constant reverse begin iterator on the pointer
-  auto crbegin() const noexcept -> const_reverse_iterator {
+  [[nodiscard]] auto crbegin() const noexcept -> const_reverse_iterator {
     return this->data.crbegin();
   }
   /// Get a constant reverse end iterator on the pointer
-  auto crend() const noexcept -> const_reverse_iterator {
+  [[nodiscard]] auto crend() const noexcept -> const_reverse_iterator {
     return this->data.crend();
   }
 
@@ -437,7 +445,7 @@ template <typename PropertyT, typename Hash> class GenericPointer {
   /// assert(left.concat(right) ==
   ///   sourcemeta::core::Pointer{"foo", "bar", "baz"});
   /// ```
-  auto concat(const GenericPointer<PropertyT, Hash> &other) const
+  [[nodiscard]] auto concat(const GenericPointer<PropertyT, Hash> &other) const
       -> GenericPointer<PropertyT, Hash> {
     GenericPointer<PropertyT, Hash> result{*this};
     result.push_back(other);
@@ -455,7 +463,8 @@ template <typename PropertyT, typename Hash> class GenericPointer {
   /// const sourcemeta::core::Pointer prefix{"foo", "bar"};
   /// assert(pointer.starts_with(prefix));
   /// ```
-  auto starts_with(const GenericPointer<PropertyT, Hash> &other) const -> bool {
+  [[nodiscard]] auto
+  starts_with(const GenericPointer<PropertyT, Hash> &other) const -> bool {
     return other.data.size() <= this->data.size() &&
            std::equal(other.data.cbegin(), other.data.cend(),
                       this->data.cbegin());
@@ -473,8 +482,8 @@ template <typename PropertyT, typename Hash> class GenericPointer {
   /// const sourcemeta::core::Pointer prefix{"foo", "bar", "baz"};
   /// assert(pointer.starts_with(prefix, tail));
   /// ```
-  auto starts_with(const GenericPointer<PropertyT, Hash> &other,
-                   const Token &tail) const -> bool {
+  [[nodiscard]] auto starts_with(const GenericPointer<PropertyT, Hash> &other,
+                                 const Token &tail) const -> bool {
     if (other.size() == this->size() + 1) {
       assert(!other.empty());
       return other.starts_with(*this) && other.back() == tail;
@@ -494,7 +503,8 @@ template <typename PropertyT, typename Hash> class GenericPointer {
   /// const sourcemeta::core::Pointer prefix{"foo", "bar", "qux"};
   /// assert(pointer.starts_with_initial(prefix));
   /// ```
-  auto starts_with_initial(const GenericPointer<PropertyT, Hash> &other) const
+  [[nodiscard]] auto
+  starts_with_initial(const GenericPointer<PropertyT, Hash> &other) const
       -> bool {
     const auto prefix_size{other.size()};
     if (prefix_size == 0) {
@@ -525,8 +535,9 @@ template <typename PropertyT, typename Hash> class GenericPointer {
   /// assert(pointer.rebase(prefix, replacement) ==
   ///   sourcemeta::core::Pointer{"qux", "baz"});
   /// ```
-  auto rebase(const GenericPointer<PropertyT, Hash> &prefix,
-              const GenericPointer<PropertyT, Hash> &replacement) const
+  [[nodiscard]] auto
+  rebase(const GenericPointer<PropertyT, Hash> &prefix,
+         const GenericPointer<PropertyT, Hash> &replacement) const
       -> GenericPointer<PropertyT, Hash> {
     typename Container::size_type index{0};
     while (index < prefix.size()) {
@@ -560,7 +571,8 @@ template <typename PropertyT, typename Hash> class GenericPointer {
   ///
   /// If the JSON Pointer is not relative to the base, a copy of the original
   /// input pointer is returned.
-  auto resolve_from(const GenericPointer<PropertyT, Hash> &base) const
+  [[nodiscard]] auto
+  resolve_from(const GenericPointer<PropertyT, Hash> &base) const
       -> GenericPointer<PropertyT, Hash> {
     typename Container::size_type index{0};
     while (index < base.size()) {
diff --git a/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_position.h b/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_position.h
index 6da8ea21e..2e36acbd5 100644
--- a/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_position.h
+++ b/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_position.h
@@ -51,8 +51,9 @@ class SOURCEMETA_CORE_JSONPOINTER_EXPORT PointerPositionTracker {
   auto operator()(const JSON::ParsePhase phase, const JSON::Type,
                   const std::uint64_t line, const std::uint64_t column,
                   const JSON &value) -> void;
-  auto get(const Pointer &pointer) const -> std::optional<Position>;
-  auto size() const -> std::size_t;
+  [[nodiscard]] auto get(const Pointer &pointer) const
+      -> std::optional<Position>;
+  [[nodiscard]] auto size() const -> std::size_t;
 
 private:
 // Exporting symbols that depends on the standard C++ library is considered
diff --git a/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_template.h b/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_template.h
index c79fb91f9..0a6eb600f 100644
--- a/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_template.h
+++ b/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_template.h
@@ -85,31 +85,39 @@ template <typename PointerT> class GenericPointerTemplate {
   /// Get a mutable end iterator on the pointer
   auto end() noexcept -> iterator { return this->data.end(); }
   /// Get a constant begin iterator on the pointer
-  auto begin() const noexcept -> const_iterator { return this->data.begin(); }
+  [[nodiscard]] auto begin() const noexcept -> const_iterator {
+    return this->data.begin();
+  }
   /// Get a constant end iterator on the pointer
-  auto end() const noexcept -> const_iterator { return this->data.end(); }
+  [[nodiscard]] auto end() const noexcept -> const_iterator {
+    return this->data.end();
+  }
   /// Get a constant begin iterator on the pointer
-  auto cbegin() const noexcept -> const_iterator { return this->data.cbegin(); }
+  [[nodiscard]] auto cbegin() const noexcept -> const_iterator {
+    return this->data.cbegin();
+  }
   /// Get a constant end iterator on the pointer
-  auto cend() const noexcept -> const_iterator { return this->data.cend(); }
+  [[nodiscard]] auto cend() const noexcept -> const_iterator {
+    return this->data.cend();
+  }
   /// Get a mutable reverse begin iterator on the pointer
   auto rbegin() noexcept -> reverse_iterator { return this->data.rbegin(); }
   /// Get a mutable reverse end iterator on the pointer
   auto rend() noexcept -> reverse_iterator { return this->data.rend(); }
   /// Get a constant reverse begin iterator on the pointer
-  auto rbegin() const noexcept -> const_reverse_iterator {
+  [[nodiscard]] auto rbegin() const noexcept -> const_reverse_iterator {
     return this->data.rbegin();
   }
   /// Get a constant reverse end iterator on the pointer
-  auto rend() const noexcept -> const_reverse_iterator {
+  [[nodiscard]] auto rend() const noexcept -> const_reverse_iterator {
     return this->data.rend();
   }
   /// Get a constant reverse begin iterator on the pointer
-  auto crbegin() const noexcept -> const_reverse_iterator {
+  [[nodiscard]] auto crbegin() const noexcept -> const_reverse_iterator {
     return this->data.crbegin();
   }
   /// Get a constant reverse end iterator on the pointer
-  auto crend() const noexcept -> const_reverse_iterator {
+  [[nodiscard]] auto crend() const noexcept -> const_reverse_iterator {
     return this->data.crend();
   }
 
@@ -172,7 +180,8 @@ template <typename PointerT> class GenericPointerTemplate {
   ///
   /// assert(left.concat(right) == expected);
   /// ```
-  auto concat(const GenericPointerTemplate<PointerT> &&other) const
+  [[nodiscard]] auto
+  concat(const GenericPointerTemplate<PointerT> &&other) const
       -> GenericPointerTemplate<PointerT> {
     GenericPointerTemplate<PointerT> result{*this};
     result.data.reserve(result.data.size() + other.data.size());
diff --git a/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_walker.h b/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_walker.h
index cece2d5ec..9441f564b 100644
--- a/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_walker.h
+++ b/src/core/jsonpointer/include/sourcemeta/core/jsonpointer_walker.h
@@ -19,10 +19,18 @@ template <typename PointerT> class GenericPointerWalker {
   GenericPointerWalker(const JSON &document) { this->walk(document, {}); }
 
   using const_iterator = typename internal::const_iterator;
-  auto begin() const -> const_iterator { return this->pointers.begin(); };
-  auto end() const -> const_iterator { return this->pointers.end(); };
-  auto cbegin() const -> const_iterator { return this->pointers.cbegin(); };
-  auto cend() const -> const_iterator { return this->pointers.cend(); };
+  [[nodiscard]] auto begin() const -> const_iterator {
+    return this->pointers.begin();
+  };
+  [[nodiscard]] auto end() const -> const_iterator {
+    return this->pointers.end();
+  };
+  [[nodiscard]] auto cbegin() const -> const_iterator {
+    return this->pointers.cbegin();
+  };
+  [[nodiscard]] auto cend() const -> const_iterator {
+    return this->pointers.cend();
+  };
 
 private:
   auto walk(const JSON &document, const PointerT &pointer) -> void {
diff --git a/src/core/jsonschema/include/sourcemeta/core/jsonschema_frame.h b/src/core/jsonschema/include/sourcemeta/core/jsonschema_frame.h
index 5c772f539..38dac4d69 100644
--- a/src/core/jsonschema/include/sourcemeta/core/jsonschema_frame.h
+++ b/src/core/jsonschema/include/sourcemeta/core/jsonschema_frame.h
@@ -110,7 +110,7 @@ class SOURCEMETA_CORE_JSONSCHEMA_EXPORT SchemaFrame {
   SchemaFrame(const Mode mode) : mode_{mode} {}
 
   // Query the current mode that the schema frame was configured with
-  auto mode() const noexcept -> Mode { return this->mode_; }
+  [[nodiscard]] auto mode() const noexcept -> Mode { return this->mode_; }
 
   /// A single entry in a JSON Schema reference map
   struct ReferencesEntry {
@@ -182,7 +182,7 @@ class SOURCEMETA_CORE_JSONSCHEMA_EXPORT SchemaFrame {
   using Paths = std::set<Pointer>;
 
   /// Export the frame entries as JSON
-  auto to_json() const -> JSON;
+  [[nodiscard]] auto to_json() const -> JSON;
 
   /// Analyse a schema or set of schemas from a given root. Passing
   /// multiple paths that have any overlap is undefined behaviour
@@ -194,45 +194,47 @@ class SOURCEMETA_CORE_JSONSCHEMA_EXPORT SchemaFrame {
           const Paths &paths = {empty_pointer}) -> void;
 
   /// Access the analysed schema locations
-  auto locations() const noexcept -> const Locations &;
+  [[nodiscard]] auto locations() const noexcept -> const Locations &;
 
   /// Access the analysed schema references
-  auto references() const noexcept -> const References &;
+  [[nodiscard]] auto references() const noexcept -> const References &;
 
   /// Check whether the analysed schema has no external references
-  auto standalone() const -> bool;
+  [[nodiscard]] auto standalone() const -> bool;
 
   /// Get the vocabularies associated with a location entry
-  auto vocabularies(const Location &location,
-                    const SchemaResolver &resolver) const -> Vocabularies;
+  [[nodiscard]] auto vocabularies(const Location &location,
+                                  const SchemaResolver &resolver) const
+      -> Vocabularies;
 
   /// Get the URI associated with a location entry
-  auto uri(const Location &location,
-           const Pointer &relative_schema_location = empty_pointer) const
+  [[nodiscard]] auto
+  uri(const Location &location,
+      const Pointer &relative_schema_location = empty_pointer) const
       -> JSON::String;
 
   /// Get the location associated by traversing a pointer from another location
-  auto traverse(const Location &location,
-                const Pointer &relative_schema_location) const
+  [[nodiscard]] auto traverse(const Location &location,
+                              const Pointer &relative_schema_location) const
       -> const Location &;
 
   /// Get the location associated with a given URI
-  auto traverse(const JSON::String &uri) const
+  [[nodiscard]] auto traverse(const JSON::String &uri) const
       -> std::optional<std::reference_wrapper<const Location>>;
 
   /// Try to dereference a reference location into its destination location
-  auto
+  [[nodiscard]] auto
   dereference(const Location &location,
               const Pointer &relative_schema_location = empty_pointer) const
       -> std::pair<SchemaReferenceType,
                    std::optional<std::reference_wrapper<const Location>>>;
 
   /// Get the unresolved instance locations associated with a location entry
-  auto instance_locations(const Location &location) const -> const
+  [[nodiscard]] auto instance_locations(const Location &location) const -> const
       typename Instances::mapped_type &;
 
   /// Find all references to a given location pointer
-  auto references_to(const Pointer &pointer) const -> std::vector<
+  [[nodiscard]] auto references_to(const Pointer &pointer) const -> std::vector<
       std::reference_wrapper<const typename References::value_type>>;
 
 private:
diff --git a/src/core/jsonschema/include/sourcemeta/core/jsonschema_transform.h b/src/core/jsonschema/include/sourcemeta/core/jsonschema_transform.h
index 84f738b79..a496bb375 100644
--- a/src/core/jsonschema/include/sourcemeta/core/jsonschema_transform.h
+++ b/src/core/jsonschema/include/sourcemeta/core/jsonschema_transform.h
@@ -93,10 +93,11 @@ class SOURCEMETA_CORE_JSONSCHEMA_EXPORT SchemaTransformRule {
       -> std::pair<bool, Result>;
 
   /// Check if the rule applies to a schema
-  auto check(const JSON &schema, const JSON &root,
-             const Vocabularies &vocabularies, const SchemaWalker &walker,
-             const SchemaResolver &resolver, const SchemaFrame &frame,
-             const SchemaFrame::Location &location) const -> Result;
+  [[nodiscard]] auto
+  check(const JSON &schema, const JSON &root, const Vocabularies &vocabularies,
+        const SchemaWalker &walker, const SchemaResolver &resolver,
+        const SchemaFrame &frame, const SchemaFrame::Location &location) const
+      -> Result;
 
   /// A method to optionally fix any reference location that was affected by the
   /// transformation.
@@ -236,10 +237,11 @@ class SOURCEMETA_CORE_JSONSCHEMA_EXPORT SchemaTransformer {
       -> bool;
 
   /// Report back the rules from the bundle that need to be applied to a schema
-  auto check(const JSON &schema, const SchemaWalker &walker,
-             const SchemaResolver &resolver, const Callback &callback,
-             const std::optional<JSON::String> &default_dialect = std::nullopt,
-             const std::optional<JSON::String> &default_id = std::nullopt) const
+  [[nodiscard]] auto
+  check(const JSON &schema, const SchemaWalker &walker,
+        const SchemaResolver &resolver, const Callback &callback,
+        const std::optional<JSON::String> &default_dialect = std::nullopt,
+        const std::optional<JSON::String> &default_id = std::nullopt) const
       -> bool;
 
 private:
diff --git a/src/core/jsonschema/include/sourcemeta/core/jsonschema_walker.h b/src/core/jsonschema/include/sourcemeta/core/jsonschema_walker.h
index 4083ade59..a953b52fa 100644
--- a/src/core/jsonschema/include/sourcemeta/core/jsonschema_walker.h
+++ b/src/core/jsonschema/include/sourcemeta/core/jsonschema_walker.h
@@ -65,10 +65,10 @@ class SOURCEMETA_CORE_JSONSCHEMA_EXPORT SchemaIterator {
       const JSON &input, const SchemaWalker &walker,
       const SchemaResolver &resolver,
       const std::optional<std::string> &default_dialect = std::nullopt);
-  auto begin() const -> const_iterator;
-  auto end() const -> const_iterator;
-  auto cbegin() const -> const_iterator;
-  auto cend() const -> const_iterator;
+  [[nodiscard]] auto begin() const -> const_iterator;
+  [[nodiscard]] auto end() const -> const_iterator;
+  [[nodiscard]] auto cbegin() const -> const_iterator;
+  [[nodiscard]] auto cend() const -> const_iterator;
 
 private:
 // Exporting symbols that depends on the standard C++ library is considered
@@ -132,10 +132,10 @@ class SOURCEMETA_CORE_JSONSCHEMA_EXPORT SchemaIteratorFlat {
       const JSON &input, const SchemaWalker &walker,
       const SchemaResolver &resolver,
       const std::optional<std::string> &default_dialect = std::nullopt);
-  auto begin() const -> const_iterator;
-  auto end() const -> const_iterator;
-  auto cbegin() const -> const_iterator;
-  auto cend() const -> const_iterator;
+  [[nodiscard]] auto begin() const -> const_iterator;
+  [[nodiscard]] auto end() const -> const_iterator;
+  [[nodiscard]] auto cbegin() const -> const_iterator;
+  [[nodiscard]] auto cend() const -> const_iterator;
 
 private:
 // Exporting symbols that depends on the standard C++ library is considered
@@ -189,10 +189,10 @@ class SOURCEMETA_CORE_JSONSCHEMA_EXPORT SchemaKeywordIterator {
       const JSON &input, const SchemaWalker &walker,
       const SchemaResolver &resolver,
       const std::optional<std::string> &default_dialect = std::nullopt);
-  auto begin() const -> const_iterator;
-  auto end() const -> const_iterator;
-  auto cbegin() const -> const_iterator;
-  auto cend() const -> const_iterator;
+  [[nodiscard]] auto begin() const -> const_iterator;
+  [[nodiscard]] auto end() const -> const_iterator;
+  [[nodiscard]] auto cbegin() const -> const_iterator;
+  [[nodiscard]] auto cend() const -> const_iterator;
 
 private:
 // Exporting symbols that depends on the standard C++ library is considered
diff --git a/src/core/uri/include/sourcemeta/core/uri.h b/src/core/uri/include/sourcemeta/core/uri.h
index 3312a7603..f5a69015f 100644
--- a/src/core/uri/include/sourcemeta/core/uri.h
+++ b/src/core/uri/include/sourcemeta/core/uri.h
@@ -85,7 +85,7 @@ class SOURCEMETA_CORE_URI_EXPORT URI {
   /// const sourcemeta::core::URI uri{"urn:example:schema"};
   /// assert(uri.is_urn());
   /// ```
-  auto is_urn() const -> bool;
+  [[nodiscard]] auto is_urn() const -> bool;
 
   /// Check if the URI is a tag as described by RFC 4151. For example:
   ///
@@ -96,7 +96,7 @@ class SOURCEMETA_CORE_URI_EXPORT URI {
   /// const sourcemeta::core::URI uri{"tag:yaml.org,2002:int"};
   /// assert(uri.is_tag());
   /// ```
-  auto is_tag() const -> bool;
+  [[nodiscard]] auto is_tag() const -> bool;
 
   /// Check if the URI has the `mailto` scheme. For example:
   ///
@@ -107,7 +107,7 @@ class SOURCEMETA_CORE_URI_EXPORT URI {
   /// const sourcemeta::core::URI uri{"mailto:joe@example.com"};
   /// assert(uri.is_mailto());
   /// ```
-  auto is_mailto() const -> bool;
+  [[nodiscard]] auto is_mailto() const -> bool;
 
   /// Check if the URI only consists of a fragment. For example:
   ///
@@ -118,7 +118,7 @@ class SOURCEMETA_CORE_URI_EXPORT URI {
   /// const sourcemeta::core::URI uri{"#foo"};
   /// assert(uri.is_fragment_only());
   /// ```
-  auto is_fragment_only() const -> bool;
+  [[nodiscard]] auto is_fragment_only() const -> bool;
 
   /// Check if the URI is relative. For example:
   ///
@@ -129,7 +129,7 @@ class SOURCEMETA_CORE_URI_EXPORT URI {
   /// sourcemeta::core::URI uri{"./foo"};
   /// assert(uri.is_relative());
   /// ```
-  auto is_relative() const -> bool;
+  [[nodiscard]] auto is_relative() const -> bool;
 
   /// Check if the host is an ipv6 address. For example:
   ///
@@ -140,7 +140,7 @@ class SOURCEMETA_CORE_URI_EXPORT URI {
   /// sourcemeta::core::URI uri{"http://[::1]"};
   /// assert(uri.is_ipv6());
   /// ```
-  auto is_ipv6() const -> bool;
+  [[nodiscard]] auto is_ipv6() const -> bool;
 
   /// Check if the URI corresponds to the empty URI. For example:
   ///
@@ -151,7 +151,7 @@ class SOURCEMETA_CORE_URI_EXPORT URI {
   /// sourcemeta::core::URI uri{""};
   /// assert(uri.empty());
   /// ```
-  auto empty() const -> bool;
+  [[nodiscard]] auto empty() const -> bool;
 
   /// Get the scheme part of the URI, if any. For example:
   ///
diff --git a/src/core/uuid/CMakeLists.txt b/src/core/uuid/CMakeLists.txt
index 324b05a72..550a41ae1 100644
--- a/src/core/uuid/CMakeLists.txt
+++ b/src/core/uuid/CMakeLists.txt
@@ -1,4 +1,15 @@
-sourcemeta_library(NAMESPACE sourcemeta PROJECT core NAME uuid SOURCES uuid.cc)
+if(SOURCEMETA_CXX_CLANG_TIDY)
+  sourcemeta_library(NAMESPACE sourcemeta
+    PROJECT core
+    NAME uuid
+    SOURCES uuid.cc
+    CLANG_TIDY "${SOURCEMETA_CXX_CLANG_TIDY}")
+else()
+  sourcemeta_library(NAMESPACE sourcemeta
+    PROJECT core
+    NAME uuid
+    SOURCES uuid.cc)
+endif()
 
 if(SOURCEMETA_CORE_INSTALL)
   sourcemeta_library_install(NAMESPACE sourcemeta PROJECT core NAME uuid)
diff --git a/test/jsonschema/jsonschema_transformer_test.cc b/test/jsonschema/jsonschema_transformer_test.cc
index 90feacd03..f4e31903f 100644
--- a/test/jsonschema/jsonschema_transformer_test.cc
+++ b/test/jsonschema/jsonschema_transformer_test.cc
@@ -540,9 +540,10 @@ TEST(JSONSchema_transformer, check_throw_if_no_dialect_invalid_default) {
     "qux": "xxx"
   })JSON");
 
-  EXPECT_THROW(bundle.check(document, sourcemeta::core::schema_official_walker,
-                            sourcemeta::core::schema_official_resolver, nullptr,
-                            "https://example.com/invalid"),
+  EXPECT_THROW((void)bundle.check(document,
+                                  sourcemeta::core::schema_official_walker,
+                                  sourcemeta::core::schema_official_resolver,
+                                  nullptr, "https://example.com/invalid"),
                sourcemeta::core::SchemaResolutionError);
 }