diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 6396f326..cddbfab4 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -30,7 +30,7 @@ jobs:
       - name: Format
         run: |
           cargo fmt --all -- --check
-          cargo clippy
+          cargo clippy --workspace --bins -- -D warnings
 
       - name: Build Debug
         run: cargo build --verbose
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
new file mode 100644
index 00000000..d46adc5b
--- /dev/null
+++ b/CONTRIBUTING.md
@@ -0,0 +1,57 @@
+You made it here! This is a great step in helping to contribute to ARK 🎈
+
+## How to contribute
+
+To get started, you can start off here [issues](https://github.com/ARK-Builders/ark-rust/issues) with those tagged [`good first issue`](https://github.com/ARK-Builders/ark-rust/issues?q=is:issue+is:open+label:%22good+first+issue%22).
+
+You can find fresh builds as artifacts of [GitHub Actions workflows](https://github.com/ARK-Builders/ark-rust/actions):
+
+- The "Verify build" workflow runs tests on supported platforms
+- Benchmarks are run on every PR. It uses [`criterion`](https://github.com/bheisler/criterion.rs) to measure performance of the code compared to current main branch
+
+## Forking the project
+
+Before we can add you as a contributor to our project, we suggest to do initial work from your own fork of the project.
+
+To create a fork, please press `fork` button on the project page:
+![fork](https://github.com/ARK-Builders/ark-rust/assets/60650661/fb950e9c-3bff-4850-9fa9-188dc59fdc15)
+
+Then you can modify everything without fear of breaking official version.
+
+## Submitting a Pull Request
+
+After you've implemented a feature or fixed a bug, it is time to open Pull Request.
+![pr](https://github.com/ARK-Builders/ark-rust/assets/60650661/ae6b0070-2d19-4c10-b09f-5f2b64e81c12)
+
+Please enable GitHub Actions in your fork, so our QA will be able to download build of your version without manually compiling from source code.
+![actions](https://github.com/ARK-Builders/ark-rust/assets/60650661/1ae7d5d3-30a4-4e19-8271-8a30ce1d4d99)
+
+### Automated code style checks
+
+The projects uses `rustfmt` and `clippy` to enforce code style and best practices. You can run them locally with:
+
+```bash
+cargo fmt --all
+cargo clippy --workspace --bins -- -D warnings
+```
+
+### Code review
+
+We care a lot about our software quality, that's why we are conducting strict code reviews before merging:
+
+- we will ask questions if we are not sure about particular technical decision
+- when possible, we will suggest alternative solution
+- GitHub Actions workflow must result in success (be green)
+- comments must be resolved before merge
+- code style should be green as well
+
+Right now, the team isn't that big, so please be patient 🙂
+
+### Merge conflicts
+
+If Pull Request is long time in reviewing phase, `main` branch might go forward too far.
+Please, fix all merge conflicts in this case 🛠
+
+## Additional read
+
+https://docs.github.com/en/get-started/quickstart/github-flow
diff --git a/fs-index/src/index.rs b/fs-index/src/index.rs
index 6aa21d43..a60287ea 100644
--- a/fs-index/src/index.rs
+++ b/fs-index/src/index.rs
@@ -106,7 +106,7 @@ impl<Id: ResourceId> ResourceIndex<Id> {
             match CanonicalPathBuf::canonicalize(&path) {
                 Ok(path) => {
                     log::trace!("[load] {} -> {}", id, path.display());
-                    index.insert_entry(path, IndexEntry { id, modified });
+                    index.insert_entry(path, IndexEntry { modified, id });
                 }
                 Err(_) => {
                     log::warn!("File {} not found", path.display());
@@ -638,7 +638,7 @@ where
     let id = Id::from_path(path)?;
     let modified = metadata.modified()?;
 
-    Ok(IndexEntry { id, modified })
+    Ok(IndexEntry { modified, id })
 }
 
 fn scan_entries<Id>(
@@ -685,9 +685,9 @@ mod tests {
     use dev_hash::Crc32;
     use fs_atomic_versions::initialize;
     use std::fs::File;
-    #[cfg(target_os = "linux")]
+    #[cfg(target_family = "unix")]
     use std::fs::Permissions;
-    #[cfg(target_os = "linux")]
+    #[cfg(target_family = "unix")]
     use std::os::unix::fs::PermissionsExt;
 
     use std::path::PathBuf;
@@ -952,7 +952,7 @@ mod tests {
 
             assert_eq!(actual.collisions.len(), 0);
             assert_eq!(actual.size(), 2);
-            #[cfg(target_os = "linux")]
+            #[cfg(target_family = "unix")]
             file.set_permissions(Permissions::from_mode(0o222))
                 .expect("Should be fine");
 
diff --git a/fs-storage/src/file_storage.rs b/fs-storage/src/file_storage.rs
index 044d39f7..191dbcb6 100644
--- a/fs-storage/src/file_storage.rs
+++ b/fs-storage/src/file_storage.rs
@@ -356,7 +356,7 @@ mod tests {
         if let Err(err) = file_storage.erase() {
             panic!("Failed to delete file: {:?}", err);
         }
-        assert_eq!(storage_path.exists(), false);
+        assert!(!storage_path.exists());
     }
 
     #[test]