diff --git a/.gitignore b/.gitignore
index 7bf286f..ee5854e 100644
--- a/.gitignore
+++ b/.gitignore
@@ -161,4 +161,8 @@ cython_debug/
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 #.idea/
 
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\ No newline at end of file
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+checksum = "728a70f3dbaf5bab7f0c4b1ac8d7ae5ea60a4b5549c8a5914361c99147a709d2"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
+
+[[package]]
+name = "tinystr"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42d3e9c45c09de15d06dd8acf5f4e0e399e85927b7f00711024eb7ae10fa4869"
+dependencies = [
+ "displaydoc",
+ "zerovec",
+]
+
+[[package]]
+name = "toml"
+version = "1.1.0+spec-1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f8195ca05e4eb728f4ba94f3e3291661320af739c4e43779cbdfae82ab239fcc"
+dependencies = [
+ "indexmap",
+ "serde_core",
+ "serde_spanned",
+ "toml_datetime",
+ "toml_parser",
+ "toml_writer",
+ "winnow",
+]
+
+[[package]]
+name = "toml_datetime"
+version = "1.1.0+spec-1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "97251a7c317e03ad83774a8752a7e81fb6067740609f75ea2b585b569a59198f"
+dependencies = [
+ "serde_core",
+]
+
+[[package]]
+name = "toml_parser"
+version = "1.1.0+spec-1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2334f11ee363607eb04df9b8fc8a13ca1715a72ba8662a26ac285c98aabb4011"
+dependencies = [
+ "winnow",
+]
+
+[[package]]
+name = "toml_writer"
+version = "1.1.0+spec-1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d282ade6016312faf3e41e57ebbba0c073e4056dab1232ab1cb624199648f8ed"
+
+[[package]]
+name = "unicode-ident"
+version = "1.0.24"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
+
+[[package]]
+name = "url"
+version = "2.5.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff67a8a4397373c3ef660812acab3268222035010ab8680ec4215f38ba3d0eed"
+dependencies = [
+ "form_urlencoded",
+ "idna",
+ "percent-encoding",
+ "serde",
+]
+
+[[package]]
+name = "utf8_iter"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b6c140620e7ffbb22c2dee59cafe6084a59b5ffc27a8859a5f0d494b5d52b6be"
+
+[[package]]
+name = "utf8parse"
+version = "0.2.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "06abde3611657adf66d383f00b093d7faecc7fa57071cce2578660c9f1010821"
+
+[[package]]
+name = "vcpkg"
+version = "0.2.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
+
+[[package]]
+name = "wasip2"
+version = "1.0.2+wasi-0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9517f9239f02c069db75e65f174b3da828fe5f5b945c4dd26bd25d89c03ebcf5"
+dependencies = [
+ "wit-bindgen",
+]
+
+[[package]]
+name = "windows-link"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f0805222e57f7521d6a62e36fa9163bc891acd422f971defe97d64e70d0a4fe5"
+
+[[package]]
+name = "windows-sys"
+version = "0.61.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae137229bcbd6cdf0f7b80a31df61766145077ddf49416a728b02cb3921ff3fc"
+dependencies = [
+ "windows-link",
+]
+
+[[package]]
+name = "winnow"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a90e88e4667264a994d34e6d1ab2d26d398dcdca8b7f52bec8668957517fc7d8"
+
+[[package]]
+name = "wit-bindgen"
+version = "0.51.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7249219f66ced02969388cf2bb044a09756a083d0fab1e566056b04d9fbcaa5"
+
+[[package]]
+name = "writeable"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9edde0db4769d2dc68579893f2306b26c6ecfbe0ef499b013d731b7b9247e0b9"
+
+[[package]]
+name = "yoke"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "72d6e5c6afb84d73944e5cedb052c4680d5657337201555f9f2a16b7406d4954"
+dependencies = [
+ "stable_deref_trait",
+ "yoke-derive",
+ "zerofrom",
+]
+
+[[package]]
+name = "yoke-derive"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b659052874eb698efe5b9e8cf382204678a0086ebf46982b79d6ca3182927e5d"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
+[[package]]
+name = "zerofrom"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50cc42e0333e05660c3587f3bf9d0478688e15d870fab3346451ce7f8c9fbea5"
+dependencies = [
+ "zerofrom-derive",
+]
+
+[[package]]
+name = "zerofrom-derive"
+version = "0.1.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d71e5d6e06ab090c67b5e44993ec16b72dcbaabc526db883a360057678b48502"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+ "synstructure",
+]
+
+[[package]]
+name = "zerotrie"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a59c17a5562d507e4b54960e8569ebee33bee890c70aa3fe7b97e85a9fd7851"
+dependencies = [
+ "displaydoc",
+ "yoke",
+ "zerofrom",
+]
+
+[[package]]
+name = "zerovec"
+version = "0.11.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c28719294829477f525be0186d13efa9a3c602f7ec202ca9e353d310fb9a002"
+dependencies = [
+ "yoke",
+ "zerofrom",
+ "zerovec-derive",
+]
+
+[[package]]
+name = "zerovec-derive"
+version = "0.11.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "eadce39539ca5cb3985590102671f2567e659fca9666581ad3411d59207951f3"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn",
+]
diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 0000000..f67235a
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,16 @@
+[package]
+name = "git-varcs"
+version = "2.0.0-alpha.0"
+edition = "2024"
+
+[[bin]]
+name = "git-vms"
+path = "src/main.rs"
+
+[dependencies]
+anyhow = "1.0.101"
+clap = { version = "4.5.59", features = ["derive"] }
+git2 = "0.20.4"
+regex = "1.12.3"
+serde = { version = "1.0.228", features = ["derive"] }
+toml = "1.0.7"
diff --git a/README.md b/README.md
index 4df1e3c..d7a4cc3 100644
--- a/README.md
+++ b/README.md
@@ -160,3 +160,31 @@ For further details or to explore more usage options, refer to the [Typer Docume
 
 ## Development
 1. Create a virtual environment and install both requirement-files.
+
+### Rust Components
+
+To build and run the rust components, use standard Cargo commands from the project root:
+
+```bash
+# Build the project
+cargo build
+
+# Run the project
+cargo run
+```
+
+The binary will be compiled into `target/debug/git-vms`.
+
+**Symlinking Binaries**
+
+For rapid development, you can symlink the compiled binaries to a location in your `$PATH` so you can run them like any other git command:
+
+```bash
+ln -s $(pwd)/target/debug/git-vms /path/to/your/bin/git-vms
+```
+
+After that, you can run the binary directly:
+
+```bash
+git vms --version
+```
diff --git a/src/cli.rs b/src/cli.rs
new file mode 100644
index 0000000..ca6c482
--- /dev/null
+++ b/src/cli.rs
@@ -0,0 +1,36 @@
+use clap::{Parser, Subcommand};
+
+#[derive(Parser)]
+#[command(version, about)]
+pub struct Cli {
+    #[command(subcommand)]
+    pub command: Commands,
+}
+
+#[derive(Subcommand)]
+pub enum Commands {
+    /// Initialize variation management support in the git repository
+    Init,
+    /// Associate feature metadata and stage files to the git index
+    Add {
+        /// Files to tag with feature meta and stage to git
+        files: Vec<String>,
+        /// Feature to associate the file(s) with
+        #[arg(short, long)]
+        feature: String,
+    },
+    /// Commit staged changes with feature metadata
+    Commit {
+        /// Commit message
+        #[arg(short, long)]
+        message: String,
+    },
+    /// Derive a variant with the features specified in fog.toml
+    Derive {
+        /// Name of the variant entry in fog.toml
+        name: String,
+        /// Refresh the variant if it already exists
+        #[arg(short, long)]
+        refresh: bool,
+    },
+}
diff --git a/src/commands.rs b/src/commands.rs
new file mode 100644
index 0000000..1e70c70
--- /dev/null
+++ b/src/commands.rs
@@ -0,0 +1,4 @@
+pub mod add;
+pub mod commit;
+pub mod derive;
+pub mod init;
diff --git a/src/commands/add.rs b/src/commands/add.rs
new file mode 100644
index 0000000..35140dc
--- /dev/null
+++ b/src/commands/add.rs
@@ -0,0 +1,31 @@
+use std::path::Path;
+
+use anyhow::{Context, Result};
+use git2::Repository;
+
+use crate::meta::{read_meta, write_meta};
+
+pub fn run(repo: &Repository, files: &[String], feature: &str) -> Result<()> {
+    let feature_meta_path = repo.path().join("varcs").join("FEATUREMETA");
+    let current_index_feature = read_meta(&feature_meta_path).unwrap_or_default();
+
+    if current_index_feature.is_empty() {
+        write_meta(&feature_meta_path, feature)?;
+    } else if feature != current_index_feature {
+        eprintln!(
+            "Current index is already associated with feature '{}'. Commit it before continuing.",
+            current_index_feature
+        );
+        return Ok(());
+    }
+
+    let mut index = repo.index()?;
+    for file in files {
+        index
+            .add_path(Path::new(file))
+            .with_context(|| format!("Failed to stage path '{}'", file))?;
+    }
+    index.write()?;
+
+    Ok(())
+}
diff --git a/src/commands/commit.rs b/src/commands/commit.rs
new file mode 100644
index 0000000..3de78fc
--- /dev/null
+++ b/src/commands/commit.rs
@@ -0,0 +1,48 @@
+use anyhow::{Context, Result};
+use git2::Repository;
+
+use crate::meta::{read_meta, write_meta};
+
+pub fn run(repo: &Repository, message: &str) -> Result<()> {
+    let feature_meta_path = repo.path().join("varcs").join("FEATUREMETA");
+    let current_index_feature = read_meta(&feature_meta_path).unwrap_or_default();
+
+    if current_index_feature.is_empty() {
+        eprintln!("No associated feature metadata. Aborting.");
+        return Ok(());
+    }
+
+    let mut index = repo.index()?;
+
+    let tree_oid = index
+        .write_tree()
+        .context("failed to write tree from index")?;
+    let tree = repo.find_tree(tree_oid)?;
+
+    let sig = repo
+        .signature()
+        .context("failed to determine git signature")?;
+    index.write()?;
+
+    let parent_commit = match repo.head() {
+        Ok(head) => {
+            let commit = head
+                .peel_to_commit()
+                .context("HEAD does not point to a commit")?;
+            Some(commit)
+        }
+        Err(_) => None,
+    };
+
+    let meta_msg = format!(
+        "{}\n\nCHANGE_ID: {}\nFEATURE: {}\n",
+        message, tree_oid, current_index_feature
+    );
+    match parent_commit {
+        Some(parent) => repo.commit(Some("HEAD"), &sig, &sig, &meta_msg, &tree, &[&parent])?,
+        None => repo.commit(Some("HEAD"), &sig, &sig, &meta_msg, &tree, &[])?,
+    };
+
+    write_meta(&feature_meta_path, "")?;
+    Ok(())
+}
diff --git a/src/commands/derive.rs b/src/commands/derive.rs
new file mode 100644
index 0000000..ce83491
--- /dev/null
+++ b/src/commands/derive.rs
@@ -0,0 +1,182 @@
+use std::collections::{HashMap, HashSet};
+use std::fs::File;
+use std::io::{BufRead, BufReader};
+use std::path::{Path, PathBuf};
+
+use anyhow::{Context, Result, anyhow};
+use git2::{BlameOptions, Commit, ObjectType, Oid, Repository, Status, Tree};
+use regex::Regex;
+
+use crate::config::{Variant, read_config};
+
+pub fn run(repo: &Repository, name: &str, refresh: bool) -> Result<()> {
+    let statuses = repo.statuses(None)?;
+    for entry in statuses.iter() {
+        let s = entry.status();
+        if s != Status::CURRENT {
+            println!("Repository is not clean!");
+            return Ok(());
+        }
+    }
+
+    let variant_spec = get_variant_spec(repo, name).context("Failed to get variant spec")?;
+    let ref_name = format!("refs/heads/variant/{}", variant_spec.name);
+
+    let variant_ref = repo.find_reference(&ref_name).ok();
+
+    let parent_refs = if let Some(variant_ref) = variant_ref {
+        if refresh {
+            let commit = variant_ref.peel_to_commit()?;
+            vec![commit]
+        } else {
+            anyhow::bail!("Variant already exists. Use --refresh to update it.");
+        }
+    } else {
+        vec![]
+    };
+    let parent_refs: Vec<&Commit> = parent_refs.iter().collect();
+
+    let target_features: HashSet<String> = variant_spec.features.iter().cloned().collect();
+    let sig = repo.signature()?;
+
+    let head = repo.head()?;
+    let tree = head.peel_to_tree()?;
+
+    let variant_tree_oid = build_variant_tree(repo, &tree, Path::new(""), &target_features)?;
+    let variant_tree = repo.find_tree(variant_tree_oid)?;
+
+    repo.commit(
+        Some(&ref_name),
+        &sig,
+        &sig,
+        &format!(
+            "variant derivation with features {:?}",
+            variant_spec.features
+        ),
+        &variant_tree,
+        &parent_refs,
+    )?;
+    Ok(())
+}
+
+fn get_variant_spec(repo: &Repository, name: &str) -> Result<Variant> {
+    let config = read_config(repo)?;
+    let variant = config
+        .variants
+        .get(name)
+        .ok_or_else(|| anyhow!("no variant found with name '{}'", name))?;
+    Ok(variant.clone())
+}
+
+fn build_variant_tree(
+    repo: &Repository,
+    tree: &Tree,
+    base_path: &Path,
+    target_features: &HashSet<String>,
+) -> Result<Oid> {
+    let mut builder = repo.treebuilder(None)?;
+    for entry in tree.iter() {
+        let name = entry
+            .name()
+            .ok_or_else(|| anyhow!("tree entry without valid UTF-8 name"))?;
+        let full_path = base_path.join(name);
+
+        match entry.kind() {
+            Some(ObjectType::Blob) => {
+                let content = process_file(repo, &full_path, target_features)
+                    .with_context(|| format!("Failed to process file {}", full_path.display()))?;
+                let oid = repo.blob(content.as_bytes())?;
+                builder.insert(name, oid, entry.filemode())?;
+            }
+            Some(ObjectType::Tree) => {
+                let subtree = repo.find_tree(entry.id())?;
+                let subtree_oid = build_variant_tree(repo, &subtree, &full_path, target_features)
+                    .with_context(|| {
+                    format!("Failed to process directory: {}", full_path.display())
+                })?;
+                builder.insert(name, subtree_oid, entry.filemode())?;
+            }
+            _ => {}
+        }
+    }
+
+    Ok(builder.write()?)
+}
+
+fn process_file(
+    repo: &Repository,
+    name: &PathBuf,
+    target_features: &HashSet<String>,
+) -> Result<String> {
+    let file = File::open(name)?;
+    let reader = BufReader::new(file);
+    let mut lines: Vec<String> = reader.lines().collect::<Result<_, _>>()?;
+
+    let mut commit_cache: HashMap<Oid, bool> = HashMap::new();
+
+    let mut blame_opts = BlameOptions::new();
+    let blame = repo.blame_file(Path::new(name), Some(&mut blame_opts))?;
+
+    for (i, line) in lines.iter_mut().enumerate() {
+        let line_no = i + 1;
+
+        let hunk = blame
+            .get_line(line_no)
+            .context("Cant get line info in hunk")?;
+
+        let oid = hunk.final_commit_id();
+
+        let contains_feature = commit_cache.entry(oid).or_insert_with(|| {
+            let commit = repo.find_commit(oid).unwrap();
+            let summary = commit.body().unwrap();
+            extract_feature_meta(summary).is_some_and(|feature| target_features.contains(feature))
+        });
+
+        if !*contains_feature {
+            *line = String::new();
+        }
+    }
+
+    // lines.retain(|line| !line.is_empty());
+    Ok(lines.join("\n"))
+}
+
+// TODO: building each time can be expensive. Look for an alternative
+fn extract_feature_meta(commit: &str) -> Option<&str> {
+    let re = Regex::new(r"(?m)^FEATURE:\s*(?P<feature>[^\n]+)$").unwrap();
+    re.captures(commit)
+        .and_then(|caps| caps.name("feature").map(|m| m.as_str()))
+}
+
+#[cfg(test)]
+mod tests {
+    use super::extract_feature_meta;
+
+    #[test]
+    fn extracts_feature_when_present() {
+        let msg = "chore: init\n\nFeature: core";
+        assert_eq!(extract_feature_meta(msg), Some("core"));
+    }
+
+    #[test]
+    fn extracts_feature_with_other_metadata() {
+        let msg = "\
+chore: initialize fog support in repo
+
+ChangeId: de9378ec963973b367aa0ad706fa006af3ce65da
+Feature: core";
+        assert_eq!(extract_feature_meta(msg), Some("core"));
+    }
+
+    #[test]
+    fn returns_none_when_no_feature() {
+        let msg = "fix: missing semicolon";
+        assert_eq!(extract_feature_meta(msg), None);
+    }
+
+    #[test]
+    fn ignores_invalid_format() {
+        let msg = "Feature core";
+        assert_eq!(extract_feature_meta(msg), None);
+    }
+}
diff --git a/src/commands/init.rs b/src/commands/init.rs
new file mode 100644
index 0000000..60dc5f1
--- /dev/null
+++ b/src/commands/init.rs
@@ -0,0 +1,32 @@
+use std::fs;
+use std::io::Write;
+
+use anyhow::{Context, Result};
+use git2::Repository;
+
+const DEFAULT_CONFIG: &str = r#"# git-varcs configuration file
+# You can define variants and associate features here
+"#;
+
+pub fn run(repo: &Repository) -> Result<()> {
+    let base_path = repo
+        .path()
+        .parent()
+        .context("Repository has no parent directory")?;
+    let config_path = base_path.join("varcs.toml");
+    let meta_path = base_path.join(".git/varcs");
+
+    fs::create_dir(meta_path)?;
+
+    let mut file = fs::OpenOptions::new()
+        .write(true)
+        .create_new(true)
+        .open(&config_path)
+        .with_context(|| format!("Failed to create config file at path: {:?}", config_path))?;
+
+    file.write(DEFAULT_CONFIG.as_bytes())
+        .with_context(|| format!("Failed to write default config to: {:?}", config_path))?;
+
+    println!("Initialized config file at {}", config_path.display());
+    Ok(())
+}
diff --git a/src/config.rs b/src/config.rs
new file mode 100644
index 0000000..bf0b62b
--- /dev/null
+++ b/src/config.rs
@@ -0,0 +1,28 @@
+use std::collections::HashMap;
+use std::fs;
+
+use anyhow::{Context, Result};
+use git2::Repository;
+use serde::Deserialize;
+
+#[derive(Deserialize)]
+pub struct Config {
+    pub variants: HashMap<String, Variant>,
+}
+
+#[derive(Deserialize, Clone)]
+pub struct Variant {
+    pub name: String,
+    pub features: Vec<String>,
+}
+
+pub fn read_config(repo: &Repository) -> Result<Config> {
+    let base_path = repo
+        .path()
+        .parent()
+        .context("Repository has no parent directory")?;
+    let config_path = base_path.join("varcs.toml");
+    let data = fs::read_to_string(config_path)?;
+    let config = toml::from_str(&data)?;
+    Ok(config)
+}
diff --git a/src/main.py b/src/main.py
deleted file mode 100644
index 4e3d766..0000000
--- a/src/main.py
+++ /dev/null
@@ -1,5 +0,0 @@
-# &begin[test]
-def test(): ...
-
-
-# &end[test]
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 0000000..12fa3bb
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,33 @@
+mod cli;
+mod commands;
+mod config;
+mod meta;
+
+use anyhow::{Context, Result};
+use clap::Parser;
+use git2::Repository;
+
+use cli::{Cli, Commands};
+use commands::{add, commit, derive, init};
+
+fn main() -> Result<()> {
+    let args = Cli::parse();
+    let repo = Repository::discover(".").context("Not in a git repository")?;
+
+    match args.command {
+        Commands::Init => {
+            init::run(&repo).context("Failed to initialize varcs support")?;
+        }
+        Commands::Add { files, feature } => {
+            add::run(&repo, &files, &feature).context("Failed staging files with meta")?;
+        }
+        Commands::Commit { message } => {
+            commit::run(&repo, &message).context("Failed commiting current index")?;
+        }
+        Commands::Derive { name, refresh } => {
+            derive::run(&repo, &name, refresh)
+                .with_context(|| format!("Failed to derive variant '{}'", name))?;
+        }
+    }
+    Ok(())
+}
diff --git a/src/meta.rs b/src/meta.rs
new file mode 100644
index 0000000..04f4b8a
--- /dev/null
+++ b/src/meta.rs
@@ -0,0 +1,14 @@
+use std::fs;
+use std::path::PathBuf;
+
+use anyhow::Result;
+
+pub fn read_meta(path: &PathBuf) -> Result<String> {
+    let data = fs::read_to_string(path)?;
+    Ok(data)
+}
+
+pub fn write_meta(path: &PathBuf, content: &str) -> Result<()> {
+    fs::write(path, content)?;
+    Ok(())
+}