protocol: VM v0.22.1 compatibility fixes

CHANGELOG.md

@@ -1,5 +1,11 @@
 # Changelog
 
+## 0.14.3 (unreleased)
+
+### Changes
+
+- Updated for compatibility with miden-vm v0.22.1 (`Arc<Library>` return types, `MastArtifact`/`PackageKind` removal) ([#2742](https://github.com/0xMiden/protocol/pull/2742)).
+
 ## 0.14.2 (2026-03-31)
 
 ### Changes

crates/miden-agglayer/build.rs

@@ -1,6 +1,7 @@
 use std::env;
 use std::fmt::Write;
 use std::path::Path;
+use std::sync::Arc;
 
 use fs_err as fs;
 use miden_assembly::diagnostics::{IntoDiagnostic, NamedSource, Result, WrapErr};
@@ -117,7 +118,7 @@ fn compile_agglayer_lib(
     let output_file = target_dir.join("agglayer").with_extension(Library::LIBRARY_EXTENSION);
     agglayer_lib.write_to_file(output_file).into_diagnostic()?;
 
-    Ok(agglayer_lib)
+    Ok(Arc::unwrap_or_clone(agglayer_lib))
 }
 
 // COMPILE EXECUTABLE MODULES
@@ -206,7 +207,7 @@ fn compile_account_components(
             target_dir.join(&component_name).with_extension(Library::LIBRARY_EXTENSION);
         component_library.write_to_file(&component_file_path).into_diagnostic()?;
 
-        component_libraries.push((component_name, component_library));
+        component_libraries.push((component_name, Arc::unwrap_or_clone(component_library)));
     }
 
     Ok(component_libraries)

crates/miden-protocol/build.rs

@@ -168,7 +168,7 @@ fn compile_tx_kernel(source_dir: &Path, target_dir: &Path, build_dir: &str) -> R
 
         let masb_file_path =
             target_dir.join("kernel_library").with_extension(Library::LIBRARY_EXTENSION);
-        test_lib.write_to_file(masb_file_path).into_diagnostic()?;
+        (*test_lib).write_to_file(masb_file_path).into_diagnostic()?;
     }
 
     Ok(assembler)
@@ -284,7 +284,7 @@ fn compile_protocol_lib(
     let output_file = target_dir.join("protocol").with_extension(Library::LIBRARY_EXTENSION);
     protocol_lib.write_to_file(output_file).into_diagnostic()?;
 
-    Ok(protocol_lib)
+    Ok(Arc::unwrap_or_clone(protocol_lib))
 }
 
 // HELPER FUNCTIONS

crates/miden-protocol/src/account/builder/mod.rs

@@ -289,7 +289,7 @@ impl AccountBuilder {
 
 #[cfg(test)]
 mod tests {
-    use std::sync::LazyLock;
+    use std::sync::{Arc, LazyLock};
 
     use assert_matches::assert_matches;
     use miden_assembly::{Assembler, Library};
@@ -312,14 +312,18 @@ mod tests {
           ";
 
     static CUSTOM_LIBRARY1: LazyLock<Library> = LazyLock::new(|| {
-        Assembler::default()
-            .assemble_library([CUSTOM_CODE1])
-            .expect("code should be valid")
+        Arc::unwrap_or_clone(
+            Assembler::default()
+                .assemble_library([CUSTOM_CODE1])
+                .expect("code should be valid"),
+        )
     });
     static CUSTOM_LIBRARY2: LazyLock<Library> = LazyLock::new(|| {
-        Assembler::default()
-            .assemble_library([CUSTOM_CODE2])
-            .expect("code should be valid")
+        Arc::unwrap_or_clone(
+            Assembler::default()
+                .assemble_library([CUSTOM_CODE2])
+                .expect("code should be valid"),
+        )
     });
 
     static CUSTOM_COMPONENT1_SLOT_NAME: LazyLock<StorageSlotName> = LazyLock::new(|| {