diff --git a/__concurrent/surelock-demo/Cargo.lock b/__concurrent/surelock-demo/Cargo.lock
new file mode 100644
index 0000000..a91c961
--- /dev/null
+++ b/__concurrent/surelock-demo/Cargo.lock
@@ -0,0 +1,74 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 4
+
+[[package]]
+name = "proc-macro2"
+version = "1.0.106"
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+ "unicode-ident",
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+ "proc-macro2",
+]
+
+[[package]]
+name = "surelock"
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+checksum = "a46767bf6a98ed239a27040ba62154869479e7ee9fc39d01cc6740edc8741cf6"
+dependencies = [
+ "thiserror",
+]
+
+[[package]]
+name = "surelock-demo"
+version = "0.1.0"
+dependencies = [
+ "surelock",
+]
+
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+ "proc-macro2",
+ "quote",
+ "unicode-ident",
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diff --git a/__concurrent/surelock-demo/Cargo.toml b/__concurrent/surelock-demo/Cargo.toml
new file mode 100644
index 0000000..1c188b7
--- /dev/null
+++ b/__concurrent/surelock-demo/Cargo.toml
@@ -0,0 +1,7 @@
+[package]
+name = "surelock-demo"
+version = "0.1.0"
+edition = "2024"
+
+[dependencies]
+surelock = "0.1.0"
diff --git a/__concurrent/surelock-demo/README.md b/__concurrent/surelock-demo/README.md
new file mode 100644
index 0000000..926c65a
--- /dev/null
+++ b/__concurrent/surelock-demo/README.md
@@ -0,0 +1,5 @@
+surelock
+
+> https://notes.brooklynzelenka.com/Blog/Surelock
+
+
diff --git a/__concurrent/surelock-demo/src/main.rs b/__concurrent/surelock-demo/src/main.rs
new file mode 100644
index 0000000..e7a11a9
--- /dev/null
+++ b/__concurrent/surelock-demo/src/main.rs
@@ -0,0 +1,3 @@
+fn main() {
+    println!("Hello, world!");
+}