diff --git a/CHANGELOG.md b/CHANGELOG.md
index 5ccd839e..125d6538 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,6 +9,10 @@
 
 ### Added
 
+- **mcpplibs.os 0.2.4。** 按 openkal 0.18 的实现：openkal 0.18.0、openkal-linux 0.19.0、openkal-macos 0.16.0、
+  openkal-windows 0.14.0、openkal-emscripten 0.7.0。其上的 ok 映像选择 openkal-platform 0.19.0（mcpp 2026.10.31.2 的
+  openkal 行钉 0.18.0，其版本组为 openkal 0.17.1）。测试成员 `os` 随之移动。GLOBAL 为 GitHub 标签归档，CN 为 GitCode
+  `mcpp-res` 镜像，sha256 两处一致。
 - **openkal-emscripten 0.7.0。** 按 openkal 0.18.0 编写，提供的十二个接口不变；`openkal.map` 不提供（Emscripten 的文件
   `mmap` 是复制，无法满足共享区域的语义），链接时缺席。mcpplibs.os 0.2.4 的 `wasm32-emscripten` 由此解析；测试成员
   `openkal` 的 wasm32 行随之移动。GLOBAL 为 GitHub 标签归档，CN 为 GitCode `mcpp-res` 镜像，sha256 两处一致。
diff --git a/pkgs/o/os.lua b/pkgs/o/os.lua
index 6d17fc0b..1e785551 100644
--- a/pkgs/o/os.lua
+++ b/pkgs/o/os.lua
@@ -31,6 +31,13 @@ package = {
 
     xpm = {
         linux = {
+            ["0.2.4"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/os/archive/refs/tags/0.2.4.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/os/releases/download/0.2.4/os-0.2.4.tar.gz",
+                },
+                sha256 = "70089d2745ff133b38c93e826e471ff080da30432abd6fd84672c7927d817d9a",
+            },
             ["0.2.3"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/os/archive/refs/tags/0.2.3.tar.gz",
@@ -73,6 +80,13 @@ package = {
             },
         },
         macosx = {
+            ["0.2.4"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/os/archive/refs/tags/0.2.4.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/os/releases/download/0.2.4/os-0.2.4.tar.gz",
+                },
+                sha256 = "70089d2745ff133b38c93e826e471ff080da30432abd6fd84672c7927d817d9a",
+            },
             ["0.2.3"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/os/archive/refs/tags/0.2.3.tar.gz",
@@ -115,6 +129,13 @@ package = {
             },
         },
         windows = {
+            ["0.2.4"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/os/archive/refs/tags/0.2.4.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/os/releases/download/0.2.4/os-0.2.4.tar.gz",
+                },
+                sha256 = "70089d2745ff133b38c93e826e471ff080da30432abd6fd84672c7927d817d9a",
+            },
             ["0.2.3"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/os/archive/refs/tags/0.2.3.tar.gz",
diff --git a/tests/examples/os/mcpp.toml b/tests/examples/os/mcpp.toml
index 8d9e351d..efa37efd 100644
--- a/tests/examples/os/mcpp.toml
+++ b/tests/examples/os/mcpp.toml
@@ -7,7 +7,7 @@ name    = "os-tests"
 version = "0.1.0"
 
 [dependencies.mcpplibs]
-os = "0.2.3"
+os = "0.2.4"
 
 [indices]
 mcpplibs = { path = "../../.." }