diff --git a/CHANGELOG.md b/CHANGELOG.md
index c7d01eff..7ec45a59 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,8 @@
 
 ### Added
 
+- **openkal-llvm-runtime 0.18.6.** Both allocator arrangements select musl 0.27.5 for scoped routing scratch with image automatic zeroing retained. The C++ runtime implementation is unchanged. All ten producer checks passed; the openkal test member follows the release. GLOBAL and CN source archives have the same verified SHA256.
+
 - **openkal-musl 0.27.5.** Scope routing scratch to the syscalls that use it and avoid large temporary initialization on empty descriptor unlocks and ordinary null-name rejections, while retaining image automatic zeroing and existing refusal/ownership behavior. All ten producer checks passed, including the same regression image on four hosts. GLOBAL and CN source archives have the same verified SHA256; the direct C-library test member follows the release.
 
 - **openkal-platform 0.23.4.** Both image and hosted arrangements select loader/tools 0.4.4, musl 0.27.4 and llvm-runtime 0.18.5. Kernel backend pins and compile/link conventions are unchanged. The hosted platform test member follows the release; mcpp remains 2026.11.3.1. GLOBAL and CN source archives have the same verified SHA256.
diff --git a/pkgs/o/openkal-llvm-runtime.lua b/pkgs/o/openkal-llvm-runtime.lua
index 4154b524..8fe38812 100644
--- a/pkgs/o/openkal-llvm-runtime.lua
+++ b/pkgs/o/openkal-llvm-runtime.lua
@@ -75,6 +75,13 @@ package = {
 
     xpm = {
         linux = {
+            ["0.18.6"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/openkal-llvm-runtime/archive/refs/tags/0.18.6.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/openkal-llvm-runtime/releases/download/0.18.6/openkal-llvm-runtime-0.18.6.tar.gz",
+                },
+                sha256 = "811fbb8b59344b319ecf70880708fd7c97c3325b0e47f5a8f8ec3b2f2bb4a898",
+            },
             ["0.18.5"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/openkal-llvm-runtime/archive/refs/tags/0.18.5.tar.gz",
@@ -469,6 +476,13 @@ package = {
             },
         },
         macosx = {
+            ["0.18.6"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/openkal-llvm-runtime/archive/refs/tags/0.18.6.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/openkal-llvm-runtime/releases/download/0.18.6/openkal-llvm-runtime-0.18.6.tar.gz",
+                },
+                sha256 = "811fbb8b59344b319ecf70880708fd7c97c3325b0e47f5a8f8ec3b2f2bb4a898",
+            },
             ["0.18.5"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/openkal-llvm-runtime/archive/refs/tags/0.18.5.tar.gz",
@@ -863,6 +877,13 @@ package = {
             },
         },
         windows = {
+            ["0.18.6"] = {
+                url    = {
+                    GLOBAL = "https://github.com/mcpplibs/openkal-llvm-runtime/archive/refs/tags/0.18.6.tar.gz",
+                    CN     = "https://gitcode.com/mcpp-res/openkal-llvm-runtime/releases/download/0.18.6/openkal-llvm-runtime-0.18.6.tar.gz",
+                },
+                sha256 = "811fbb8b59344b319ecf70880708fd7c97c3325b0e47f5a8f8ec3b2f2bb4a898",
+            },
             ["0.18.5"] = {
                 url    = {
                     GLOBAL = "https://github.com/mcpplibs/openkal-llvm-runtime/archive/refs/tags/0.18.5.tar.gz",
diff --git a/tests/examples/openkal/mcpp.toml b/tests/examples/openkal/mcpp.toml
index b541ea96..6164009f 100644
--- a/tests/examples/openkal/mcpp.toml
+++ b/tests/examples/openkal/mcpp.toml
@@ -30,7 +30,7 @@ openkal-macos = "0.21.3"
 openkal-windows = "0.19.0"
 
 [target.'cfg(all(os = "linux", env = "musl"))'.dependencies.mcpplibs]
-openkal-llvm-runtime = "0.18.5"
+openkal-llvm-runtime = "0.18.6"
 
 [target.'cfg(arch = "wasm32")'.dependencies.mcpplibs]
 openkal-emscripten = "0.12.0"