diff --git a/CMakeLists.txt b/CMakeLists.txt
index 12b4915e3..9ce10c4ef 100755
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -15,8 +15,8 @@ if("${CMAKE_SOURCE_DIR}" STREQUAL "${CMAKE_BINARY_DIR}")
 endif()
 
 option(CMARK_TESTS "Build cmark-gfm tests and enable testing" ON)
-option(CMARK_STATIC "Build static libcmark-gfm library" ON)
-option(CMARK_SHARED "Build shared libcmark-gfm library" ON)
+option(CMARK_STATIC "Build static libcmarkly library" ON)
+option(CMARK_SHARED "Build shared libcmarkly library" ON)
 option(CMARK_LIB_FUZZER "Build libFuzzer fuzzing harness" OFF)
 option(CMARK_FUZZ_QUADRATIC "Build quadratic fuzzing harness" OFF)
 
diff --git a/api_test/CMakeLists.txt b/api_test/CMakeLists.txt
index 55f33e087..220a7812d 100644
--- a/api_test/CMakeLists.txt
+++ b/api_test/CMakeLists.txt
@@ -10,9 +10,9 @@ include_directories(
   ${PROJECT_BINARY_DIR}/extensions
 )
 if(CMARK_SHARED)
-  target_link_libraries(api_test libcmark-gfm-extensions libcmark-gfm)
+  target_link_libraries(api_test libcmarkly-extensions libcmarkly)
 else()
-  target_link_libraries(api_test libcmark-gfm-extensions_static libcmark-gfm_static)
+  target_link_libraries(api_test libcmarkly-extensions_static libcmarkly_static)
 endif()
 
 # Compiler flags
diff --git a/extensions/CMakeLists.txt b/extensions/CMakeLists.txt
index e545b6d6f..0a01d074f 100644
--- a/extensions/CMakeLists.txt
+++ b/extensions/CMakeLists.txt
@@ -1,5 +1,5 @@
-set(LIBRARY "libcmark-gfm-extensions")
-set(STATICLIBRARY "libcmark-gfm-extensions_static")
+set(LIBRARY "libcmarkly-extensions")
+set(STATICLIBRARY "libcmarkly-extensions_static")
 set(LIBRARY_SOURCES
     core-extensions.c
     table.c
@@ -26,8 +26,7 @@ if (CMARK_SHARED)
   add_library(${LIBRARY} SHARED ${LIBRARY_SOURCES})
 
   set_target_properties(${LIBRARY} PROPERTIES
-    OUTPUT_NAME "cmark-gfm-extensions"
-    DEFINE_SYMBOL "cmark-gfm"
+    OUTPUT_NAME "cmarkly-extensions"
     SOVERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}.gfm.${PROJECT_VERSION_GFM}
     VERSION ${PROJECT_VERSION})
 
@@ -35,10 +34,10 @@ if (CMARK_SHARED)
     APPEND PROPERTY MACOSX_RPATH true)
 
   # Avoid name clash between PROGRAM and LIBRARY pdb files.
-  set_target_properties(${LIBRARY} PROPERTIES PDB_NAME cmark-gfm-extensions_dll)
+  set_target_properties(${LIBRARY} PROPERTIES PDB_NAME cmarkly-extensions_dll)
 
   list(APPEND CMARK_INSTALL ${LIBRARY})
-  target_link_libraries(${LIBRARY} libcmark-gfm)
+  target_link_libraries(${LIBRARY} libcmarkly)
 
 endif()
 
@@ -47,16 +46,15 @@ if (CMARK_STATIC)
 
   set_target_properties(${STATICLIBRARY} PROPERTIES
     COMPILE_FLAGS "-DCMARK_GFM_STATIC_DEFINE -DCMARK_GFM_EXTENSIONS_STATIC_DEFINE"
-    DEFINE_SYMBOL "cmark-gfm"
     POSITION_INDEPENDENT_CODE ON)
 
   if (MSVC)
     set_target_properties(${STATICLIBRARY} PROPERTIES
-      OUTPUT_NAME "cmark-gfm-extensions_static"
+      OUTPUT_NAME "cmarkly-extensions_static"
       VERSION ${PROJECT_VERSION})
   else()
     set_target_properties(${STATICLIBRARY} PROPERTIES
-      OUTPUT_NAME "cmark-gfm-extensions"
+      OUTPUT_NAME "cmarkly-extensions"
       VERSION ${PROJECT_VERSION})
   endif(MSVC)
 
@@ -67,7 +65,7 @@ set(CMAKE_INSTALL_SYSTEM_RUNTIME_LIBS_NO_WARNINGS ON)
 
 include (InstallRequiredSystemLibraries)
 install(TARGETS ${CMARK_INSTALL}
-  EXPORT cmark-gfm-extensions
+  EXPORT cmarkly-extensions
   RUNTIME DESTINATION bin
   LIBRARY DESTINATION lib${LIB_SUFFIX}
   ARCHIVE DESTINATION lib${LIB_SUFFIX}
@@ -79,7 +77,7 @@ if (CMARK_SHARED OR CMARK_STATIC)
   DESTINATION include
   )
 
-  install(EXPORT cmark-gfm-extensions DESTINATION lib${LIB_SUFFIX}/cmake-gfm-extensions)
+  install(EXPORT cmarkly-extensions DESTINATION lib${LIB_SUFFIX}/cmake/cmarkly-extensions)
 endif()
 
 # Feature tests
diff --git a/fuzz/CMakeLists.txt b/fuzz/CMakeLists.txt
index a9ed57aa5..8bde0300d 100644
--- a/fuzz/CMakeLists.txt
+++ b/fuzz/CMakeLists.txt
@@ -12,9 +12,9 @@ macro(fuzzer name)
           COMPILE_FLAGS "-fsanitize=fuzzer"
           LINK_FLAGS "-fsanitize=fuzzer")
     if(CMARK_SHARED)
-      target_link_libraries(${name} libcmark-gfm-extensions libcmark-gfm)
+      target_link_libraries(${name} libcmarkly-extensions libcmarkly)
     elseif(CMARK_STATIC)
-      target_link_libraries(${name} libcmark-gfm-extensions_static libcmark-gfm_static)
+      target_link_libraries(${name} libcmarkly-extensions_static libcmarkly_static)
     endif()
 endmacro()
 
diff --git a/man/make_man_page.py b/man/make_man_page.py
index d95620252..64ccaa0a5 100644
--- a/man/make_man_page.py
+++ b/man/make_man_page.py
@@ -21,9 +21,9 @@
 sysname = platform.system()
 
 if sysname == 'Darwin':
-    cmark = CDLL("build/src/libcmark-gfm.dylib")
+    cmark = CDLL("build/src/libcmarkly.dylib")
 else:
-    cmark = CDLL("build/src/libcmark-gfm.so")
+    cmark = CDLL("build/src/libcmarkly.so")
 
 parse_document = cmark.cmark_parse_document
 parse_document.restype = c_void_p
diff --git a/README.md b/readme.md
similarity index 81%
rename from README.md
rename to readme.md
index 0b9f719f6..7bf8fb9cb 100644
--- a/README.md
+++ b/readme.md
@@ -1,16 +1,37 @@
-cmark-gfm
-=========
+# CMarkly
 
-![Actions CI](https://github.com/github/cmark-gfm/actions/workflows/ci.yml/badge.svg)
+![Actions CI](https://github.com/socketry/cmarkly/actions/workflows/ci.yml/badge.svg)
 
-`cmark-gfm` is an extended version of the C reference implementation of
-[CommonMark], a rationalized version of Markdown syntax with a spec.  This
-repository adds GitHub Flavored Markdown extensions to
-[the upstream implementation], as defined in [the spec].
+`CMarkly` is [Markly]'s maintained fork of [GitHub's `cmark-gfm`]. It adds
+functionality needed by Markly while remaining based on GitHub's implementation
+of GitHub Flavored Markdown.
 
-The rest of the README is preserved as-is from the upstream source.  Note that
-the library and binaries produced by this fork are suffixed with `-gfm` in
-order to distinguish them from the upstream.
+The existing `cmark-gfm` C API, headers, and command retain their original names
+for source compatibility and to keep synchronizing upstream changes
+straightforward. The libraries, pkg-config metadata, and CMake targets use the
+`cmarkly` name to distinguish this independently maintained fork from its
+upstream project.
+
+## Maintained Differences
+
+Compared with GitHub's `cmark-gfm`, CMarkly:
+
+- Accepts `:` in HTML tag names, supporting XML namespace prefixes such as
+  `<svg:circle>`.
+- Omits the trailing newline when rendering an inline node by itself.
+- Reports accurate end-line source positions for single-line and multi-line HTML
+  blocks.
+- Supports opt-in front matter parsing through `CMARK_OPT_FRONT_MATTER`, exposed
+  as `CMARK_NODE_FRONT_MATTER` nodes.
+- Supports opt-in language prefixes for inline code, such as `` ruby:`Object.new` ``,
+  through `CMARK_OPT_INLINE_CODE_INFO` and the code-info accessors.
+- Provides `cmark_node_clone` for independently cloning complete node trees,
+  including supported extension metadata and footnote relationships. User data
+  is intentionally not copied.
+
+The rest of the README is preserved as-is from the upstream source. References
+to `cmark-gfm` below describe the compatible API, headers, and command inherited
+from upstream.
 
 ---
 
@@ -194,6 +215,8 @@ Nick Wellnhofer contributed many improvements, including
 most of the C library's API and its test harness.
 
 [benchmarks]: benchmarks.md
+[Markly]: https://github.com/socketry/markly
+[GitHub's `cmark-gfm`]: https://github.com/github/cmark-gfm
 [the spec]: https://github.github.com/gfm/
 [the upstream implementation]: https://github.com/jgm/cmark
 [CommonMark]: http://commonmark.org
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
index 79c2382d9..9339a48b1 100644
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -4,8 +4,8 @@ endif()
 
 include(GNUInstallDirs)
 
-set(LIBRARY "libcmark-gfm")
-set(STATICLIBRARY "libcmark-gfm_static")
+set(LIBRARY "libcmarkly")
+set(STATICLIBRARY "libcmarkly_static")
 set(HEADERS
   cmark-gfm.h
   cmark-gfm-extension_api.h
@@ -79,9 +79,9 @@ CHECK_FILE_OFFSET_BITS()
 add_executable(${PROGRAM} ${PROGRAM_SOURCES})
 
 if(CMARK_SHARED)
-  target_link_libraries(${PROGRAM} libcmark-gfm-extensions libcmark-gfm)
+  target_link_libraries(${PROGRAM} libcmarkly-extensions libcmarkly)
 elseif(CMARK_STATIC)
-  target_link_libraries(${PROGRAM} libcmark-gfm-extensions_static libcmark-gfm_static)
+  target_link_libraries(${PROGRAM} libcmarkly-extensions_static libcmarkly_static)
 endif()
 
 # Disable the PUBLIC declarations when compiling the executable:
@@ -103,7 +103,7 @@ if (CMARK_SHARED)
   add_library(${LIBRARY} SHARED ${LIBRARY_SOURCES})
   # Include minor version and patch level in soname for now.
   set_target_properties(${LIBRARY} PROPERTIES
-    OUTPUT_NAME "cmark-gfm"
+    OUTPUT_NAME "cmarkly"
     SOVERSION ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}.${PROJECT_VERSION_PATCH}.gfm.${PROJECT_VERSION_GFM}
     VERSION ${PROJECT_VERSION})
 
@@ -111,7 +111,7 @@ if (CMARK_SHARED)
     APPEND PROPERTY MACOSX_RPATH true)
 
   # Avoid name clash between PROGRAM and LIBRARY pdb files.
-  set_target_properties(${LIBRARY} PROPERTIES PDB_NAME cmark-gfm_dll)
+  set_target_properties(${LIBRARY} PROPERTIES PDB_NAME cmarkly_dll)
 
   generate_export_header(${LIBRARY}
     BASE_NAME ${PROJECT_NAME})
@@ -127,11 +127,11 @@ if (CMARK_STATIC)
 
   if (MSVC)
     set_target_properties(${STATICLIBRARY} PROPERTIES
-      OUTPUT_NAME "cmark-gfm_static"
+      OUTPUT_NAME "cmarkly_static"
       VERSION ${PROJECT_VERSION})
   else()
     set_target_properties(${STATICLIBRARY} PROPERTIES
-      OUTPUT_NAME "cmark-gfm"
+      OUTPUT_NAME "cmarkly"
       VERSION ${PROJECT_VERSION})
   endif(MSVC)
 
@@ -156,16 +156,16 @@ endif()
 set(libdir lib${LIB_SUFFIX})
 
 install(TARGETS ${PROGRAM} ${CMARK_INSTALL}
-  EXPORT cmark-gfm
+  EXPORT cmarkly
   RUNTIME DESTINATION bin
   LIBRARY DESTINATION ${libdir}
   ARCHIVE DESTINATION ${libdir}
   )
 
 if(CMARK_SHARED OR CMARK_STATIC)
-  configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libcmark-gfm.pc.in
-    ${CMAKE_CURRENT_BINARY_DIR}/libcmark-gfm.pc @ONLY)
-  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libcmark-gfm.pc
+  configure_file(${CMAKE_CURRENT_SOURCE_DIR}/libcmarkly.pc.in
+    ${CMAKE_CURRENT_BINARY_DIR}/libcmarkly.pc @ONLY)
+  install(FILES ${CMAKE_CURRENT_BINARY_DIR}/libcmarkly.pc
     DESTINATION ${libdir}/pkgconfig)
 
   install(FILES
@@ -176,7 +176,7 @@ if(CMARK_SHARED OR CMARK_STATIC)
     DESTINATION include
     )
 
-  install(EXPORT cmark-gfm DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake)
+  install(EXPORT cmarkly DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/cmarkly)
 endif()
 
 # Feature tests
diff --git a/src/libcmark-gfm.pc.in b/src/libcmarkly.pc.in
similarity index 53%
rename from src/libcmark-gfm.pc.in
rename to src/libcmarkly.pc.in
index 46fff31a2..03c71e406 100644
--- a/src/libcmark-gfm.pc.in
+++ b/src/libcmarkly.pc.in
@@ -3,8 +3,8 @@ exec_prefix=@CMAKE_INSTALL_PREFIX@
 libdir=@CMAKE_INSTALL_PREFIX@/@libdir@
 includedir=@CMAKE_INSTALL_PREFIX@/include
 
-Name: libcmark-gfm
-Description: CommonMark parsing, rendering, and manipulation with GitHub Flavored Markdown extensions
+Name: libcmarkly
+Description: CMarkly Markdown parsing, rendering, and manipulation
 Version: @PROJECT_VERSION@
-Libs: -L${libdir} -lcmark-gfm -lcmark-gfm-extensions
+Libs: -L${libdir} -lcmarkly -lcmarkly-extensions
 Cflags: -I${includedir}
diff --git a/test/cmark.py b/test/cmark.py
index b0eb20dbe..5526e0340 100644
--- a/test/cmark.py
+++ b/test/cmark.py
@@ -93,13 +93,12 @@ def __init__(self, prog=None, library_dir=None, extensions=None):
             if not library_dir:
                 library_dir = os.path.join("..", "build", "src")
             for prefix, suffix in libnames:
-                candidate = os.path.join(library_dir, prefix + "cmark-gfm" + suffix)
+                candidate = os.path.join(library_dir, prefix + "cmarkly" + suffix)
                 if os.path.isfile(candidate):
                     libpath = candidate
                     break
             cmark = CDLL(libpath)
             extlib = CDLL(os.path.join(
-                library_dir, "..", "extensions", prefix + "cmark-gfm-extensions" + suffix))
+                library_dir, "..", "extensions", prefix + "cmarkly-extensions" + suffix))
             self.to_html = lambda x, exts=[]: to_html(cmark, extlib, x, exts + self.extensions)
             self.to_commonmark = lambda x, exts=[]: to_commonmark(cmark, extlib, x, exts + self.extensions)
-
diff --git a/wrappers/wrapper_ext.py b/wrappers/wrapper_ext.py
index f08cc2076..2df522cac 100755
--- a/wrappers/wrapper_ext.py
+++ b/wrappers/wrapper_ext.py
@@ -3,7 +3,7 @@
 #
 # Example for using the shared library from python.
 # Will work with either python 2 or python 3.
-# Requires cmark-gfm and cmark-gfm-extensions libraries to be installed.
+# Requires libcmarkly and libcmarkly-extensions to be installed.
 #
 # This particular example uses the GitHub extensions from the gfm-extensions
 # library. EXTENSIONS specifies which to use, and the sample shows how to
@@ -14,14 +14,14 @@
 import ctypes
 
 if sys.platform == 'darwin':
-    libname = 'libcmark-gfm.dylib'
-    extname = 'libcmark-gfm-extensions.dylib'
+    libname = 'libcmarkly.dylib'
+    extname = 'libcmarkly-extensions.dylib'
 elif sys.platform == 'win32':
-    libname = 'cmark-gfm.dll'
-    extname = 'cmark-gfm-extensions.dll'
+    libname = 'cmarkly.dll'
+    extname = 'cmarkly-extensions.dll'
 else:
-    libname = 'libcmark-gfm.so'
-    extname = 'libcmark-gfm-extensions.so'
+    libname = 'libcmarkly.so'
+    extname = 'libcmarkly-extensions.so'
 cmark = ctypes.CDLL(libname)
 cmark_ext = ctypes.CDLL(extname)
 
@@ -36,7 +36,7 @@
   'tagfilter',
   )
 
-# Use ctypes to access the functions in libcmark-gfm
+# Use ctypes to access the functions in libcmarkly
 
 F_cmark_parser_new = cmark.cmark_parser_new
 F_cmark_parser_new.restype = ctypes.c_void_p
@@ -75,7 +75,7 @@
 F_cmark_render_html.argtypes = (ctypes.c_void_p, ctypes.c_int, ctypes.c_void_p)
 
 
-# Set up the libcmark-gfm library and its extensions
+# Set up the libcmarkly library and its extensions
 F_register = cmark_ext.cmark_gfm_core_extensions_ensure_registered
 F_register.restype = None
 F_register.argtypes = ( )