diff --git a/.github/actions/dart_package/action.yaml b/.github/actions/dart_package/action.yaml
index bb5e5439..c2697f1e 100644
--- a/.github/actions/dart_package/action.yaml
+++ b/.github/actions/dart_package/action.yaml
@@ -1,38 +1,39 @@
 name: Dart Package Workflow
+description: Build and test your Dart packages.
 
 inputs:
   concurrency:
     required: false
-    type: number
-    default: 4
+    default: "4"
+    description: The value of the concurrency flag (-j) used when running tests
   coverage_excludes:
     required: false
-    type: string
     default: ""
+    description: Globs to exclude from coverage
   dart_sdk:
     required: false
-    type: string
     default: "stable"
+    description: "The dart sdk version to use"
   working_directory:
     required: false
-    type: string
     default: "."
+    description: The working directory for this workflow
   min_coverage:
     required: false
-    type: number
-    default: 100
+    default: "100"
+    description: The minimum coverage percentage value
   analyze_directories:
     required: false
-    type: string
     default: "lib test"
+    description: Directories to analyze
   report_on:
     required: false
-    type: string
     default: "lib"
+    description: Directories to report on when collecting coverage
   platform:
     required: false
-    type: string
     default: "vm"
+    description: Platform to use when running tests
 
 runs:
   using: "composite"
diff --git a/.github/actions/rust_crate/action.yaml b/.github/actions/rust_crate/action.yaml
new file mode 100644
index 00000000..6e450c12
--- /dev/null
+++ b/.github/actions/rust_crate/action.yaml
@@ -0,0 +1,21 @@
+name: Rust Crate Workflow
+description: Build and test your Rust crate
+
+inputs:
+  working_directory:
+    required: false
+    default: "."
+    description: The working directory for this workflow.
+
+runs:
+  using: "composite"
+  steps:
+    - name: Build
+      working-directory: ${{ inputs.working_directory }}
+      shell: ${{ inputs.shell }}
+      run: cargo build --verbose
+
+    - name: Test
+      working-directory: ${{ inputs.working_directory }}
+      shell: ${{ inputs.shell }}
+      run: cargo test --verbose
diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 3ef3d30f..df13fa33 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -17,7 +17,8 @@ jobs:
       pull-requests: read
 
     outputs:
-      needs_build: ${{ steps.needs_build.outputs.changes }}
+      needs_dart_build: ${{ steps.needs_dart_build.outputs.changes }}
+      needs_rust_build: ${{ steps.needs_rust_build.outputs.changes }}
       needs_verify: ${{ steps.needs_verify.outputs.changes }}
 
     name: 👀 Detect Changes
@@ -28,7 +29,7 @@ jobs:
 
       - uses: dorny/paths-filter@v2
         name: Build Detection
-        id: needs_build
+        id: needs_dart_build
         with:
           filters: |
             shorebird_cli:
@@ -42,6 +43,15 @@ jobs:
               - ./.github/actions/dart_package
               - packages/shorebird_code_push_protocol/**
 
+      - uses: dorny/paths-filter@v2
+        name: Build Detection
+        id: needs_rust_build
+        with:
+          filters: |
+            updater:
+              - ./.github/actions/rust
+              - updater/**
+
       - uses: dorny/paths-filter@v2
         name: Verify Detection
         id: needs_verify
@@ -51,13 +61,13 @@ jobs:
               - ./.github/actions/dart_package
               - packages/shorebird_cli/**
 
-  build_packages:
+  build_dart_packages:
     needs: changes
-    if: ${{ needs.changes.outputs.needs_build != '[]' }}
+    if: ${{ needs.changes.outputs.needs_dart_build != '[]' }}
 
     strategy:
       matrix:
-        package: ${{ fromJSON(needs.changes.outputs.needs_build) }}
+        package: ${{ fromJSON(needs.changes.outputs.needs_dart_build) }}
 
     runs-on: ubuntu-latest
 
@@ -72,6 +82,27 @@ jobs:
         with:
           working_directory: packages/${{ matrix.package }}
 
+  build_rust_crates:
+    needs: changes
+    if: ${{ needs.changes.outputs.needs_rust_build != '[]' }}
+
+    strategy:
+      matrix:
+        crate: ${{ fromJSON(needs.changes.outputs.needs_rust_build) }}
+
+    runs-on: ubuntu-latest
+
+    name: 🦀 Build ${{ matrix.crate }}
+
+    steps:
+      - name: 📚 Git Checkout
+        uses: actions/checkout@v3
+
+      - name: 🦀 Build ${{ matrix.package }}
+        uses: ./.github/actions/rust_crate
+        with:
+          working_directory: ${{ matrix.crate }}
+
   verify_packages:
     needs: changes
     if: ${{ needs.changes.outputs.needs_verify != '[]' }}
@@ -94,7 +125,8 @@ jobs:
           working_directory: packages/${{ matrix.package }}
 
   ci:
-    needs: [semantic_pull_request, build_packages, verify_packages]
+    needs:
+      [semantic_pull_request, build_dart_packages, build_rust_crates, verify_packages]
     if: ${{ always() }}
 
     runs-on: ubuntu-latest
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/models.dart b/packages/shorebird_code_push_protocol/lib/src/models/models.dart
index ce00521a..06b55763 100644
--- a/packages/shorebird_code_push_protocol/lib/src/models/models.dart
+++ b/packages/shorebird_code_push_protocol/lib/src/models/models.dart
@@ -1,4 +1,3 @@
 export 'app.dart';
 export 'patch.dart';
-export 'patch_artifact.dart';
 export 'user.dart';
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/patch_artifact.dart b/packages/shorebird_code_push_protocol/lib/src/models/patch_artifact.dart
deleted file mode 100644
index 80891474..00000000
--- a/packages/shorebird_code_push_protocol/lib/src/models/patch_artifact.dart
+++ /dev/null
@@ -1,33 +0,0 @@
-import 'package:json_annotation/json_annotation.dart';
-
-part 'patch_artifact.g.dart';
-
-/// {@template patch_artifact}
-/// A patch artifact represents the contents of an update (patch) for a specific
-/// platform and architecture.
-/// {@endtemplate}
-@JsonSerializable()
-class PatchArtifact {
-  /// {@macro patch_PatchArtifact}
-  const PatchArtifact({
-    required this.patchNumber,
-    required this.downloadUrl,
-    required this.hash,
-  });
-
-  /// Converts a Map<String, dynamic> to an [PatchArtifact]
-  factory PatchArtifact.fromJson(Map<String, dynamic> json) =>
-      _$PatchArtifactFromJson(json);
-
-  /// Converts an [PatchArtifact] to a Map<String, dynamic>
-  Map<String, dynamic> toJson() => _$PatchArtifactToJson(this);
-
-  /// The patch number associated with the artifact.
-  final int patchNumber;
-
-  /// The URL of the artifact.
-  final String downloadUrl;
-
-  /// The hash of the artifact.
-  final String hash;
-}
diff --git a/packages/shorebird_code_push_protocol/lib/src/models/patch_artifact.g.dart b/packages/shorebird_code_push_protocol/lib/src/models/patch_artifact.g.dart
deleted file mode 100644
index ead612da..00000000
--- a/packages/shorebird_code_push_protocol/lib/src/models/patch_artifact.g.dart
+++ /dev/null
@@ -1,34 +0,0 @@
-// GENERATED CODE - DO NOT MODIFY BY HAND
-
-// ignore_for_file: implicit_dynamic_parameter, require_trailing_commas, cast_nullable_to_non_nullable, lines_longer_than_80_chars
-
-part of 'patch_artifact.dart';
-
-// **************************************************************************
-// JsonSerializableGenerator
-// **************************************************************************
-
-PatchArtifact _$PatchArtifactFromJson(Map<String, dynamic> json) =>
-    $checkedCreate(
-      'PatchArtifact',
-      json,
-      ($checkedConvert) {
-        final val = PatchArtifact(
-          patchNumber: $checkedConvert('patch_number', (v) => v as int),
-          downloadUrl: $checkedConvert('download_url', (v) => v as String),
-          hash: $checkedConvert('hash', (v) => v as String),
-        );
-        return val;
-      },
-      fieldKeyMap: const {
-        'patchNumber': 'patch_number',
-        'downloadUrl': 'download_url'
-      },
-    );
-
-Map<String, dynamic> _$PatchArtifactToJson(PatchArtifact instance) =>
-    <String, dynamic>{
-      'patch_number': instance.patchNumber,
-      'download_url': instance.downloadUrl,
-      'hash': instance.hash,
-    };
diff --git a/packages/shorebird_code_push_protocol/test/src/models/patch_artifact_test.dart b/packages/shorebird_code_push_protocol/test/src/models/patch_artifact_test.dart
deleted file mode 100644
index 22581441..00000000
--- a/packages/shorebird_code_push_protocol/test/src/models/patch_artifact_test.dart
+++ /dev/null
@@ -1,18 +0,0 @@
-import 'package:shorebird_code_push_protocol/shorebird_code_push_protocol.dart';
-import 'package:test/test.dart';
-
-void main() {
-  group('PatchArtifact', () {
-    test('can be (de)serialized', () {
-      const patchArtifact = PatchArtifact(
-        patchNumber: 1,
-        downloadUrl: 'https://example.com',
-        hash: '#',
-      );
-      expect(
-        PatchArtifact.fromJson(patchArtifact.toJson()).toJson(),
-        equals(patchArtifact.toJson()),
-      );
-    });
-  });
-}
diff --git a/updater/cli/src/main.rs b/updater/cli/src/main.rs
index beeb3c8a..f2c1a136 100644
--- a/updater/cli/src/main.rs
+++ b/updater/cli/src/main.rs
@@ -21,7 +21,7 @@ fn main() {
 
     let config = updater::AppConfig {
         cache_dir: "updater_cache".to_owned(),
-        base_version: "0.1.0".to_owned(),
+        release_version: "0.1.0".to_owned(),
         original_libapp_path: "libapp.so".to_owned(),
         vm_path: "libflutter.so".to_owned(),
     };
@@ -50,7 +50,7 @@ base_url: http://localhost:8000
             match version {
                 Some(v) => {
                     println!("path: {:?}", v.path);
-                    println!("version: {:?}", v.version);
+                    println!("number: {:?}", v.number);
                 }
                 None => {
                     println!("None");
diff --git a/updater/library/include/updater.h b/updater/library/include/updater.h
index 584cf1fa..fc4d0e34 100644
--- a/updater/library/include/updater.h
+++ b/updater/library/include/updater.h
@@ -21,10 +21,10 @@
  */
 typedef struct AppParameters {
   /**
-   * base_version, required.  Named version of the app, off of which updates
+   * release_version, required.  Named version of the app, off of which updates
    * are based.  Can be either a version number or a hash.
    */
-  const char *base_version;
+  const char *release_version;
   /**
    * Path to the original aot library, required.  For Flutter apps this
    * is the path to the bundled libapp.so.  May be used for compression
diff --git a/updater/library/src/c_api.rs b/updater/library/src/c_api.rs
index e8f877f7..615383e0 100644
--- a/updater/library/src/c_api.rs
+++ b/updater/library/src/c_api.rs
@@ -14,9 +14,9 @@ use crate::updater;
 /// NOTE: If this struct is changed all language bindings must be updated.
 #[repr(C)]
 pub struct AppParameters {
-    /// base_version, required.  Named version of the app, off of which updates
+    /// release_version, required.  Named version of the app, off of which updates
     /// are based.  Can be either a version number or a hash.
-    pub base_version: *const libc::c_char,
+    pub release_version: *const libc::c_char,
 
     /// Path to the original aot library, required.  For Flutter apps this
     /// is the path to the bundled libapp.so.  May be used for compression
@@ -43,7 +43,7 @@ fn app_config_from_c(c_params: *const AppParameters) -> updater::AppConfig {
 
     updater::AppConfig {
         cache_dir: to_rust(c_params_ref.cache_dir),
-        base_version: to_rust(c_params_ref.base_version),
+        release_version: to_rust(c_params_ref.release_version),
         original_libapp_path: to_rust(c_params_ref.original_libapp_path),
         vm_path: to_rust(c_params_ref.vm_path),
     }
@@ -67,13 +67,14 @@ pub extern "C" fn shorebird_init(c_params: *const AppParameters, c_yaml: *const
 }
 
 /// Return the active version of the app, or NULL if there is no active version.
+// TODO: This should probably be renamed to `shorebird_active_patch_number`.
 #[no_mangle]
 pub extern "C" fn shorebird_active_version() -> *mut c_char {
-    let version = updater::active_patch();
-    match version {
+    let patch = updater::active_patch();
+    match patch {
         Some(v) => {
-            let c_version = CString::new(v.version).unwrap();
-            c_version.into_raw()
+            let c_patch = CString::new(v.number.to_string()).unwrap();
+            c_patch.into_raw()
         }
         None => std::ptr::null_mut(),
     }
diff --git a/updater/library/src/cache.rs b/updater/library/src/cache.rs
index cd5271ba..d6567fdf 100644
--- a/updater/library/src/cache.rs
+++ b/updater/library/src/cache.rs
@@ -11,15 +11,15 @@ use crate::network::{download_file_to_path, PatchCheckResponse};
 #[derive(PartialEq, Debug)]
 pub struct PatchInfo {
     pub path: String,
-    pub version: String,
+    pub number: usize,
 }
 
 #[derive(Deserialize, Serialize, Default, Clone)]
 struct Slot {
     /// Path to the slot directory.
     path: String,
-    /// Version of the patch in this slot.
-    patch_version: String,
+    /// Patch number for the patch in this slot.
+    patch_number: usize,
 }
 
 // This struct is public, as callers can have a handle to it, but modifying
@@ -27,10 +27,10 @@ struct Slot {
 #[derive(Deserialize, Serialize)]
 pub struct UpdaterState {
     /// List of patches that failed to boot.  We will never attempt these again.
-    failed_patches: Vec<String>,
+    failed_patches: Vec<usize>,
     /// List of patches that successfully booted. We will never rollback past
     /// one of these for this device.
-    successful_patches: Vec<String>,
+    successful_patches: Vec<usize>,
     /// Currently selected slot.
     current_slot_index: usize,
     /// List of slots.
@@ -51,11 +51,11 @@ impl Default for UpdaterState {
 
 impl UpdaterState {
     pub fn is_known_good_patch(&self, patch: &PatchInfo) -> bool {
-        self.successful_patches.iter().any(|v| v == &patch.version)
+        self.successful_patches.iter().any(|v| v == &patch.number)
     }
 
     pub fn is_known_bad_patch(&self, patch: &PatchInfo) -> bool {
-        self.failed_patches.iter().any(|v| v == &patch.version)
+        self.failed_patches.iter().any(|v| v == &patch.number)
     }
 
     pub fn mark_patch_as_bad(&mut self, patch: &PatchInfo) {
@@ -67,7 +67,7 @@ impl UpdaterState {
         if self.is_known_bad_patch(patch) {
             return;
         }
-        self.failed_patches.push(patch.version.clone());
+        self.failed_patches.push(patch.number.clone());
     }
 
     pub fn mark_patch_as_good(&mut self, patch: &PatchInfo) {
@@ -79,7 +79,7 @@ impl UpdaterState {
         if self.is_known_good_patch(patch) {
             return;
         }
-        self.successful_patches.push(patch.version.clone());
+        self.successful_patches.push(patch.number.clone());
     }
 
     pub fn load(cache_dir: &str) -> anyhow::Result<Self> {
@@ -111,7 +111,7 @@ impl UpdaterState {
         // Otherwise return the version info from the current slot.
         return Some(PatchInfo {
             path: slot.path.clone(),
-            version: slot.patch_version.clone(),
+            number: slot.patch_number.clone(),
         });
     }
 
@@ -180,7 +180,7 @@ fn download_into_slot(
         slot_index,
         Slot {
             path: path.to_str().unwrap().to_string(),
-            patch_version: patch.version.clone(),
+            patch_number: patch.number.clone(),
         },
     );
     state.save(cache_dir)?;
diff --git a/updater/library/src/config.rs b/updater/library/src/config.rs
index e415cfb9..a8f83cb3 100644
--- a/updater/library/src/config.rs
+++ b/updater/library/src/config.rs
@@ -38,7 +38,7 @@ pub struct ResolvedConfig {
     pub cache_dir: String,
     pub channel: String,
     pub app_id: String,
-    pub base_version: String,
+    pub release_version: String,
     pub original_libapp_path: String,
     pub vm_path: String,
     pub base_url: String,
@@ -51,7 +51,7 @@ impl ResolvedConfig {
             cache_dir: String::new(),
             channel: String::new(),
             app_id: String::new(),
-            base_version: String::new(),
+            release_version: String::new(),
             original_libapp_path: String::new(),
             vm_path: String::new(),
             base_url: String::new(),
@@ -77,7 +77,7 @@ pub fn set_config(config: AppConfig, yaml: YamlConfig) {
         .to_owned();
     lock.cache_dir = config.cache_dir.to_string();
     lock.app_id = yaml.app_id.to_string();
-    lock.base_version = config.base_version.to_string();
+    lock.release_version = config.release_version.to_string();
     lock.original_libapp_path = config.original_libapp_path.to_string();
     lock.vm_path = config.vm_path.to_string();
     lock.is_initialized = true;
diff --git a/updater/library/src/network.rs b/updater/library/src/network.rs
index f2d07998..9c2f94c1 100644
--- a/updater/library/src/network.rs
+++ b/updater/library/src/network.rs
@@ -17,7 +17,7 @@ fn patches_check_url(base_url: &str) -> String {
 
 #[derive(Debug, Deserialize)]
 pub struct Patch {
-    pub version: String,
+    pub number: usize,
     pub hash: String,
     pub download_url: String,
 }
@@ -40,9 +40,9 @@ pub fn send_patch_check_request(
     let mut body = HashMap::new();
     body.insert("app_id", config.app_id.clone());
     body.insert("channel", config.channel.clone());
-    body.insert("base_version", config.base_version.clone());
+    body.insert("release_version", config.release_version.clone());
     if let Some(patch) = patch {
-        body.insert("patch_version", patch.version);
+        body.insert("patch_number", patch.number.to_string());
     }
     body.insert("platform", current_platform().to_string());
     body.insert("arch", current_arch().to_string());
diff --git a/updater/library/src/updater.rs b/updater/library/src/updater.rs
index f816f429..8892d473 100644
--- a/updater/library/src/updater.rs
+++ b/updater/library/src/updater.rs
@@ -52,7 +52,7 @@ impl Display for UpdateError {
 // but making &str from CStr* is a bit of a pain.
 pub struct AppConfig {
     pub cache_dir: String,
-    pub base_version: String,
+    pub release_version: String,
     pub original_libapp_path: String,
     pub vm_path: String,
 }
@@ -168,7 +168,7 @@ mod tests {
         crate::init(
             crate::AppConfig {
                 cache_dir: cache_dir.clone(),
-                base_version: "1.0.0".to_string(),
+                release_version: "1.0.0".to_string(),
                 original_libapp_path: "original_libapp_path".to_string(),
                 vm_path: "vm_path".to_string(),
             },
@@ -185,7 +185,7 @@ mod tests {
             crate::init(
                 crate::AppConfig {
                     cache_dir: cache_dir.clone(),
-                    base_version: "1.0.0".to_string(),
+                    release_version: "1.0.0".to_string(),
                     original_libapp_path: "original_libapp_path".to_string(),
                     vm_path: "vm_path".to_string(),
                 },