diff --git a/CHANGELOG.md b/CHANGELOG.md
index f2d6cd69..2cb2407a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,10 @@
 
 ### Added
 
+- **openkal-platform 0.21.0；openkal-emscripten 0.10.0。** openkal 0.21 的版本组：openkal 0.21.0 与三个实现、openkal-musl 0.26.0、
+  openkal-llvm-runtime 0.17.0、openkal-ld/run/tools 0.3.0；mcpp 2026.11.2.2 以它为内置的 `<arch>-openkal` 平台。openkal-emscripten
+  0.10.0 按 openkal 0.21 编写，0.21 的增补都在它不提供的接口上，其余不变。GLOBAL 为 GitHub 标签归档，CN 为 GitCode `mcpp-res` 镜像，
+  sha256 两处一致。
 - **openkal-musl 0.26.0、openkal-llvm-runtime 0.17.0。** openkal-musl 的分配器为嵌入的 mimalloc 3.6.1（`malloc-mimalloc`，默认；
   `malloc-mallocng` 保留 musl 自己的），匿名内存建在 `openkal.region` 上，定位读写不持锁，八个字符串函数按向量处理，普通互斥锁按
   glibc 的方式等待。openkal-llvm-runtime 建在其上（裸机选 mallocng），PE 与 Mach-O 上 `thread_local` 的析构读到自己的变量
diff --git a/pkgs/o/openkal-emscripten.lua b/pkgs/o/openkal-emscripten.lua
index 7eec0cbf..1718ff07 100644
--- a/pkgs/o/openkal-emscripten.lua
+++ b/pkgs/o/openkal-emscripten.lua
@@ -46,6 +46,13 @@ package = {
 
     xpm = {
         linux = {
+            ["0.10.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/openkal-emscripten/archive/refs/tags/0.10.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/openkal-emscripten/releases/download/0.10.0/openkal-emscripten-0.10.0.tar.gz",
+                },
+                sha256 = "0a7988e5950d91cd5fa815e56e27bfce66780b3e4efc27f386c8d81a9904c8e8",
+            },
             ["0.9.0"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/openkal-emscripten/archive/refs/tags/0.9.0.tar.gz",
@@ -125,6 +132,13 @@ package = {
             },
         },
         macosx = {
+            ["0.10.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/openkal-emscripten/archive/refs/tags/0.10.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/openkal-emscripten/releases/download/0.10.0/openkal-emscripten-0.10.0.tar.gz",
+                },
+                sha256 = "0a7988e5950d91cd5fa815e56e27bfce66780b3e4efc27f386c8d81a9904c8e8",
+            },
             ["0.9.0"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/openkal-emscripten/archive/refs/tags/0.9.0.tar.gz",
@@ -204,6 +218,13 @@ package = {
             },
         },
         windows = {
+            ["0.10.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/openkal-emscripten/archive/refs/tags/0.10.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/openkal-emscripten/releases/download/0.10.0/openkal-emscripten-0.10.0.tar.gz",
+                },
+                sha256 = "0a7988e5950d91cd5fa815e56e27bfce66780b3e4efc27f386c8d81a9904c8e8",
+            },
             ["0.9.0"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/openkal-emscripten/archive/refs/tags/0.9.0.tar.gz",
diff --git a/pkgs/o/openkal-platform.lua b/pkgs/o/openkal-platform.lua
index 4d01ab14..d1c4ca47 100644
--- a/pkgs/o/openkal-platform.lua
+++ b/pkgs/o/openkal-platform.lua
@@ -26,6 +26,13 @@ package = {
 
     xpm = {
         linux = {
+            ["0.21.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/openkal-platform/archive/refs/tags/0.21.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/openkal-platform/releases/download/0.21.0/openkal-platform-0.21.0.tar.gz",
+                },
+                sha256 = "278792651d83e585820dd2b243ba9ca53fb7b0371f1cfed212311e2f00495448",
+            },
             ["0.20.2"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/openkal-platform/archive/refs/tags/0.20.2.tar.gz",
@@ -98,6 +105,13 @@ package = {
             },
         },
         macosx = {
+            ["0.21.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/openkal-platform/archive/refs/tags/0.21.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/openkal-platform/releases/download/0.21.0/openkal-platform-0.21.0.tar.gz",
+                },
+                sha256 = "278792651d83e585820dd2b243ba9ca53fb7b0371f1cfed212311e2f00495448",
+            },
             ["0.20.2"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/openkal-platform/archive/refs/tags/0.20.2.tar.gz",
@@ -170,6 +184,13 @@ package = {
             },
         },
         windows = {
+            ["0.21.0"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/openkal-platform/archive/refs/tags/0.21.0.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/openkal-platform/releases/download/0.21.0/openkal-platform-0.21.0.tar.gz",
+                },
+                sha256 = "278792651d83e585820dd2b243ba9ca53fb7b0371f1cfed212311e2f00495448",
+            },
             ["0.20.2"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/openkal-platform/archive/refs/tags/0.20.2.tar.gz",
diff --git a/tests/examples/openkal/mcpp.toml b/tests/examples/openkal/mcpp.toml
index a224772e..1ed09c35 100644
--- a/tests/examples/openkal/mcpp.toml
+++ b/tests/examples/openkal/mcpp.toml
@@ -33,7 +33,7 @@ openkal-windows = "0.17.0"
 openkal-llvm-runtime = "0.17.0"
 
 [target.'cfg(arch = "wasm32")'.dependencies.mcpplibs]
-openkal-emscripten = "0.9.0"
+openkal-emscripten = "0.10.0"
 
 [target.'cfg(arch = "riscv64")'.dependencies.mcpplibs]
 openkal-opensbi = "0.8.3"