diff --git a/crates/mist-api/src/builder.rs b/crates/mist-api/src/builder.mist
similarity index 52%
rename from crates/mist-api/src/builder.rs
rename to crates/mist-api/src/builder.mist
index ec74fc6..90a9bd9 100644
--- a/crates/mist-api/src/builder.rs
+++ b/crates/mist-api/src/builder.mist
@@ -1,36 +1,37 @@
-use std::{
-    collections::HashMap,
-    env, fs,
-    path::{MAIN_SEPARATOR, PathBuf},
-    process::{Command, Stdio},
-};
-
-use cargo_metadata::{CompilerMessage, Message};
-use mist_parser::rev_mapper::{RustMap, find_mapping, get_mapping};
+use <std::collections::HashMap>;
+use <std::env>;
+use <std::fs>;
+use <std::path::MAIN_SEPARATOR>;
+use <std::path::PathBuf>;
+use <std::process::Command>;
+use <std::process::Stdio>;
+use <cargo_metadata::CompilerMessage>;
+use <cargo_metadata::Message>;
+use <mist_parser::rev_mapper>;
 
 #[derive(Debug, Clone)]
 pub struct MistDiagnosticMessage {
-    pub message: String,
-    pub file_path: PathBuf,
-    pub file_name: String,
-    pub line: usize,
-    pub column: usize,
+    pub String message,
+    pub PathBuf file_path,
+    pub String file_name,
+    pub usize line,
+    pub usize column,
 }
 
 #[derive(Debug, Clone)]
 pub enum MistDiagnostic {
-    Error(MistDiagnosticMessage),
-    Warning(MistDiagnosticMessage),
-    Rust(CompilerMessage),
+    Error[MistDiagnosticMessage],
+    Warning[MistDiagnosticMessage],
+    Rust[CompilerMessage],
 }
 
-pub fn build(mut args: Vec<String>, root: PathBuf) -> bool {
+pub bool build(Vec<String> mut args, PathBuf root) {
     args.remove(0);
     args.insert(1, "--message-format=json".to_string());
 
-    let is_root = root == env::current_dir().expect("Failed getting env");
+    var is_root = root == env::current_dir().expect("Failed getting env");
 
-    let mut command = Command::new("cargo")
+    var mut command = Command::new("cargo")
         .args(args)
         .stdout(Stdio::piped())
         .stderr(Stdio::inherit())
@@ -38,63 +39,63 @@ pub fn build(mut args: Vec<String>, root: PathBuf) -> bool {
         .spawn()
         .expect("Failed to run cargo");
 
-    let mut reader = std::io::BufReader::new(command.stdout.take().expect("Failed to get reader"));
+    var mut reader = std::io::BufReader::new(command.stdout.take().expect("Failed to get reader"));
 
-    let mut diagnostics = Vec::new();
+    var mut diagnostics = Vec::new();
 
-    let mut mapping = HashMap::new();
+    var mut mapping = HashMap::new();
 
-    let mist_src = format!(".mist{MAIN_SEPARATOR}src");
+    var mist_src = format!(".mist{MAIN_SEPARATOR}src");
 
-    for message in cargo_metadata::Message::parse_stream(&mut reader) {
-        match message {
-            Ok(Message::CompilerMessage(msg)) => {
-                for span in &msg.message.spans {
-                    if span.is_primary {
-                        let rust_path = root.join(&span.file_name);
+    for (message : cargo_metadata::Message::parse_stream(&mut reader)) {
+        match (message) {
+            Ok[Message::CompilerMessage[msg]] => {
+                for (span : &msg.message.spans) {
+                    if (span.is_primary) {
+                        var rust_path = root.join(&span.file_name);
 
-                        let mist_file = span
+                        var mist_file = span
                             .file_name
                             .replacen(&mist_src, "src", 1)
                             .trim_end_matches(".rs")
                             .to_string()
                             + ".mist";
 
-                        let mist_path = root.join(&mist_file);
+                        var mist_path = root.join(&mist_file);
 
-                        if !fs::exists(&mist_path).expect("Unable to check if mist file exists") {
+                        if (!fs::exists(&mist_path).expect("Unable to check if mist file exists")) {
                             diagnostics.push(MistDiagnostic::Rust(msg));
                             break;
                         }
 
-                        let map = mapping.entry(rust_path.clone()).or_insert_with(|| {
-                            get_mapping(
+                        var map = mapping.entry(rust_path.clone()).or_insert_with(|| {
+                            rev_mapper::get_mapping(
                                 &fs::read_to_string(rust_path)
-                                    .expect("Failed to read file for mapping"),
+                                    .expect("Failed to read file for mapping")
                             )
                         });
 
-                        let mist_span =
-                            find_mapping(&map, &RustMap(span.line_end, span.column_start))
+                        var [_, rev_mapper::MistMap[line, column]] =
+                            rev_mapper::find_mapping(&map, &rev_mapper::RustMap(span.line_end, span.column_start))
                                 .expect("Unable to find mapping");
 
-                        let mist_msg = MistDiagnosticMessage {
+                        var mist_msg = MistDiagnosticMessage {
                             message: format!(
                                 "{}: {}",
                                 msg.message.message,
                                 span.label.clone().unwrap_or_default()
                             ),
-                            file_name: if is_root {
+                            file_name: if (is_root) {
                                 mist_file
                             } else {
                                 mist_path.to_string_lossy().to_string()
                             },
                             file_path: mist_path,
-                            line: mist_span.1.0,
-                            column: mist_span.1.1,
+                            line: line,
+                            column: column
                         };
 
-                        match msg.message.level {
+                        match (msg.message.level) {
                             cargo_metadata::diagnostic::DiagnosticLevel::Error => {
                                 diagnostics.push(MistDiagnostic::Error(mist_msg))
                             }
@@ -109,14 +110,14 @@ pub fn build(mut args: Vec<String>, root: PathBuf) -> bool {
                 }
             }
 
-            Ok(Message::BuildFinished(finish)) => {
+            Ok[Message::BuildFinished[finish]] => {
                 print_diagnostics(&diagnostics);
 
-                let mut raw_reader = reader.into_inner();
-                let mut stdout = std::io::stdout();
+                var mut raw_reader = reader.into_inner();
+                var mut stdout = std::io::stdout();
 
                 std::io::copy(&mut raw_reader, &mut stdout)
-                    .map_err(|v| v.to_string())
+                    .map_err(|var v| v.to_string())
                     .expect("(Mist) Failed to copy IO");
 
                 command.wait().unwrap();
@@ -124,7 +125,7 @@ pub fn build(mut args: Vec<String>, root: PathBuf) -> bool {
                 return finish.success;
             }
 
-            Ok(Message::TextLine(text)) => println!("{text}"),
+            Ok[Message::TextLine[text]] => println!("{text}");
             _ => {}
         }
     }
@@ -132,13 +133,13 @@ pub fn build(mut args: Vec<String>, root: PathBuf) -> bool {
     false
 }
 
-pub fn print_diagnostics(diagnostics: &Vec<MistDiagnostic>) {
-    let mut files = HashMap::new();
+pub void print_diagnostics(Vec<MistDiagnostic>* diagnostics) {
+    var mut files = HashMap::new();
 
-    for diag in diagnostics {
-        match diag {
-            MistDiagnostic::Error(msg) => {
-                let line = get_line(&mut files, &msg);
+    for (diag : diagnostics) {
+        match (diag) {
+            MistDiagnostic::Error[msg] => {
+                var line = get_line(&mut files, &msg);
 
                 println!(
                     "\n{}:{}:{}\n \x1b[31mError\x1b[0m: {}\n\t{}",
@@ -150,8 +151,8 @@ pub fn print_diagnostics(diagnostics: &Vec<MistDiagnostic>) {
                 )
             }
 
-            MistDiagnostic::Warning(msg) => {
-                let line = get_line(&mut files, &msg);
+            MistDiagnostic::Warning[msg] => {
+                var line = get_line(&mut files, &msg);
 
                 println!(
                     "\n{}:{}:{}\n \x1b[33mWarning\x1b[0m: {}\n\t{}",
@@ -163,18 +164,18 @@ pub fn print_diagnostics(diagnostics: &Vec<MistDiagnostic>) {
                 )
             }
 
-            MistDiagnostic::Rust(rs) => println!("{rs}"),
+            MistDiagnostic::Rust[rs] => println!("{rs}");
         }
     }
 }
 
-pub fn get_line(
-    files: &mut HashMap<PathBuf, Vec<String>>,
-    msg: &MistDiagnosticMessage,
-) -> Option<String> {
-    let src_path = msg.file_path.clone();
+pub Option<String> get_line(
+    HashMap<PathBuf, Vec<String>> mut* files,
+    MistDiagnosticMessage* msg,
+) {
+    var src_path = msg.file_path.clone();
 
-    let lines = files.entry(src_path.clone()).or_insert_with(|| {
+    var lines = files.entry(src_path.clone()).or_insert_with(|| {
         fs::read_to_string(src_path)
             .expect("Unable to read mist file")
             .lines()
@@ -183,5 +184,5 @@ pub fn get_line(
             .collect()
     });
 
-    lines.get(msg.line - 1).map(|v| v.trim().to_string())
+    lines.get(msg.line - 1).map(|var v| v.trim().to_string())
 }
diff --git a/crates/mist-api/src/modules.mist b/crates/mist-api/src/modules.mist
index edf47d2..d28df95 100644
--- a/crates/mist-api/src/modules.mist
+++ b/crates/mist-api/src/modules.mist
@@ -9,25 +9,27 @@ pub class Module {
     pub PathBuf path;
     pub Vec<Self> children;
 
-    pub constructor(String name, PathBuf mist_path, PathBuf rust_path) {
+    pub constructor(PathBuf mist_path) {
         self.children = new Vec();
-        self.name = name;
+        self.name = mist_path.file_stem()
+            .and_then(|var s| s.to_str())
+            .expect("Failed to get module name")
+            .to_string();
         self.path = mist_path;
 
         if (self.path.is_dir()) {
             PathBuf dir = self.path.clone();
 
-            // Behavior 2: It's a directory node. Check for gateway package.mist first.
             PathBuf pkg_gate = self.path.join("package.mist");
             if (pkg_gate.exists()) {
                 self.path = pkg_gate;
             }
-            
-            self.scan_directory(&dir, &rust_path);
+
+            self.scan_directory(&dir);
         }
     }
 
-    void scan_directory(self mut*, Path* search_dir, Path* rust_path) {
+    void scan_directory(self mut*, Path* search_dir) {
         var entries = match (fs::read_dir(search_dir)) {
             Ok[entries] => entries;
             Err[e] => {
@@ -51,18 +53,7 @@ pub class Module {
                 continue;
             }
 
-            String child_name = child_path.file_stem()
-                .and_then(|var s| s.to_str())
-                .expect("Failed to get module name")
-                .to_string();
-
-            PathBuf child_output = rust_path.join(&child_name).with_extension("rs");
-
-            if (!child_path.is_dir() && should_skip(&child_path, &child_output)) {
-                continue;
-            }
-
-            self.children.push(new Module(child_name, child_path, child_output));
+            self.children.push(new Module(child_path));
         }
     }
 
@@ -83,35 +74,13 @@ pub class Module {
     }
 }
 
-pub Module master_package(PathBuf mist_path, PathBuf rust_path) {
-    String name = mist_path.file_stem()
-        .and_then(|var s| s.to_str())
-        .expect("Failed to get module name")
-        .to_string();
+pub Module master_package(PathBuf mist_path) {
+    var mut root_mod = new Module(mist_path.clone());
 
-    var mut root_mod = new Module(name, mist_path.clone(), rust_path.clone());
+    Path* parent_dir = mist_path.parent()
+        .expect("Failed to get parent directory of root file");
 
-    if (!mist_path.is_dir()) {
-        PathBuf parent_dir = mist_path.parent()
-            .expect("Failed to get parent directory of root file")
-            .to_path_buf();
-            
-        root_mod.scan_directory(&parent_dir, &rust_path);
-    }
+    root_mod.scan_directory(parent_dir);
 
     root_mod
 }
-
-bool should_skip(Path* source, Path* output) {
-    var src_time = fs::metadata(source)
-        .ok()
-        .and_then(|var v| v.modified().ok());
-
-    var out_time = fs::metadata(output)
-        .ok()
-        .and_then(|var v| v.modified().ok());
-
-    out_time
-        .map(|var out_time| out_time >= src_time.unwrap())
-        .unwrap_or_default()
-}
diff --git a/crates/mist-api/src/transpiler.mist b/crates/mist-api/src/transpiler.mist
index da5a49b..789c422 100644
--- a/crates/mist-api/src/transpiler.mist
+++ b/crates/mist-api/src/transpiler.mist
@@ -1,5 +1,4 @@
 use <std::fs>;
-use <std::path::Path>;
 use <std::path::PathBuf>;
 use <std::process>;
 use <std::time>;
@@ -8,7 +7,7 @@ use <std::env>;
 use <mist_parser::error>;
 use <crate::modules>;
 
-pub PathBuf build(bool force) {
+pub PathBuf transpile() {
     var start = time::Instant::now();
 
     var root = env::current_dir().expect("Unable to find project root");
@@ -16,7 +15,7 @@ pub PathBuf build(bool force) {
     PathBuf src = root.join("src");
     PathBuf out = root.join(".mist/src");
 
-    var master = modules::master_package(src.join("main.mist"), out.join("main.rs"));
+    var master = modules::master_package(src.join("main.mist"));
 
     master.transpile(&out);
 
@@ -32,6 +31,16 @@ pub PathBuf build(bool force) {
 
 impl modules::Module {
     String transpile(self*, PathBuf* parent_dir) {
+        if (!self.path.is_dir() && self.path.extension().and_then(|var v| v.to_str()) != Some("mist")) {
+            var file_name = self.path.file_name()
+                .and_then(|var s| s.to_str())
+                .expect("Failed to get file name");
+
+            fs::copy(&self.path, parent_dir.join(&file_name)).expect("Failed to copy SideFile");
+
+            return String::new();
+        }
+
         PathBuf dir = self.output_dir(&parent_dir);
         PathBuf output_file = self.output_path(&parent_dir);
 
@@ -44,6 +53,10 @@ impl modules::Module {
         }
 
         if (self.path.is_dir()) {
+            if (output.len() == 0) {
+                return String::new();
+            }
+
             var res = fs::write(&output_file, output);
 
             if (res.is_err()) {
diff --git a/mist-test/src/app.mist b/mist-test/src/app.mist
deleted file mode 100644
index 9e68eb4..0000000
--- a/mist-test/src/app.mist
+++ /dev/null
@@ -1,123 +0,0 @@
-use <super::task>;
-use <super::logger>;
-use <super::event>;
-
-pub class Application {
-    String name;
-
-    Vec<task::Task> tasks;
-    Vec<String> plugins;
-
-    logger::Logger logger;
-
-    bool running;
-    i32 ticks;
-
-    pub constructor(str* name) {
-        self.name = name.to_string();
-        self.tasks = new Vec();
-        self.plugins = new Vec();
-
-        self.logger = new logger::Logger("app");
-
-        self.running = false;
-        self.ticks = 0;
-    }
-
-    pub void boot(self mut*) {
-        self.logger.info("booting application");
-
-        self.running = true;
-
-        self.emit(event::Event::Startup);
-    }
-
-    pub void run(self mut*) {
-        while(self.running) {
-            self.tick();
-
-            if(self.ticks >= 5) {
-                self.shutdown();
-            }
-        }
-    }
-
-    void tick(self mut*) {
-        self.logger.info("tick");
-
-        self.ticks++;
-
-        var task = task::create_task("background-job");
-
-        self.tasks.push(task);
-
-        println!("tasks: {}", self.tasks.len());
-    }
-
-    pub void shutdown(self mut*) {
-        self.emit(event::Event::Shutdown);
-
-        self.logger.warning("shutdown");
-
-        self.running = false;
-    }
-
-    pub void register_plugin(self mut*, String name) {
-        self.plugins.push(name.clone());
-
-        self.emit(event::Event::PluginLoaded(name));
-    }
-
-    void emit(self*, event::Event event) {
-        match(event) {
-            event::Event::Startup => {
-                self.logger.info("startup event");
-            }
-
-            event::Event::Shutdown => {
-                self.logger.info("shutdown event");
-            }
-
-            event::Event::PluginLoaded[name] => {
-                println!("plugin loaded: {}", name);
-            }
-
-            event::Event::TaskExecuted[name] => {
-                println!("task executed: {}", name);
-            }
-
-            event::Event::Error[message] => {
-                self.logger.error(&message);
-            }
-        }
-    }
-}
-
-i32 test_stmt() {
-    if (0 == 0) {
-        0
-    }
-    else {
-        1
-    }
-}
-
-void loops_test() {
-    for (x : 0..10) {
-        println!("{x}");
-    }
-
-    for (var mut i = 0; i < 10; i++) {
-        println!("{i}");
-    }
-
-    var i = 0;
-
-    while (i == 1) {
-        println!("hi");
-    }
-
-    loop {
-        println!("loop!");
-    }
-}
diff --git a/mist-test/src/event.mist b/mist-test/src/event.mist
deleted file mode 100644
index 61a1292..0000000
--- a/mist-test/src/event.mist
+++ /dev/null
@@ -1,7 +0,0 @@
-pub enum Event {
-    Startup,
-    Shutdown,
-    TaskExecuted[String],
-    PluginLoaded[String],
-    Error[String],
-}
\ No newline at end of file
diff --git a/mist-test/src/logger.mist b/mist-test/src/logger.mist
deleted file mode 100644
index fab6cea..0000000
--- a/mist-test/src/logger.mist
+++ /dev/null
@@ -1,72 +0,0 @@
-use <std::fmt::Formatter>;
-use <std::fmt>;
-
-pub trait TestLogging<T: fmt::Display>: fmt::Display {
-    String get(self*);
-}
-
-pub enum LogLevel {
-    Info,
-    Warning,
-    Error,
-}
-
-impl fmt::Display for LogLevel {
-    fmt::Result fmt(self*, Formatter<'_> mut* f) {
-        match (self) {
-            LogLevel::Info => write!(f, "[INFO]");
-
-            LogLevel::Warning => write!(f, "[WARN]");
-
-            LogLevel::Error => write!(f, "[ERROR]");
-        }
-    }
-}
-
-impl TestLogging<LogLevel> for LogLevel {
-    String get(self*) {
-        return format!("{self}");
-    }
-}
-
-pub class Logger {
-    String prefix;
-
-    pub constructor(str* prefix) {
-        self.prefix = prefix.to_string();
-    }
-
-    pub void info(self*, str* message) {
-        self.log(LogLevel::Info, message);
-    }
-
-    pub void warning(self*, str* message) {
-        self.log(LogLevel::Warning, message);
-    }
-
-    pub void error(self*, str* message) {
-        self.log(LogLevel::Error, message);
-    }
-
-    void log(self*, LogLevel level, str* message) {
-        match(level) {
-            LogLevel::Info => {
-                println!("{level} {} {}", self.prefix, message);
-            }
-
-            LogLevel::Warning => {
-                println!("{} {} {}", level.get(), self.prefix, message);
-            }
-
-            LogLevel::Error => {
-                println!("{level} {} {}", self.prefix, message);
-            }
-        }
-    }
-
-    impl fmt::Display {
-        fmt::Result fmt(self*, Formatter<'_> mut* f) {
-            write!(f, "logger ({})", self.prefix)
-        }
-    }
-}
\ No newline at end of file
diff --git a/mist-test/src/main.mist b/mist-test/src/main.mist
index 317b44f..a6546d1 100644
--- a/mist-test/src/main.mist
+++ b/mist-test/src/main.mist
@@ -1,22 +1,3 @@
 void main() {
-    var mut app_instance = new app::Application("mist-app");
-
-    app_instance.boot();
-    app_instance.run();
-}
-
-void do_stuff() {
-    vec!(1, 2, 3).into_iter().map(Option<i32> |var v| {Some(v)}).collect::<Vec<_>>();
-
-    if (43==69) testing1();
-}
-
-i32 testing1() {
-
-    i32 v = if (0 == 0) {
-        0
-    } else {
-        1
-    };
-    v
-}
+    test_package::hello();
+}
\ No newline at end of file
diff --git a/mist-test/src/plugin.mist b/mist-test/src/plugin.mist
deleted file mode 100644
index a3d16ba..0000000
--- a/mist-test/src/plugin.mist
+++ /dev/null
@@ -1,16 +0,0 @@
-pub struct PluginInfo {
-    pub String name,
-    pub String version,
-}
-
-pub class PluginRegistry<T> {
-    T plugins;
-
-    pub constructor(T plugins) {
-        self.plugins = plugins;
-    }
-
-    pub T plugins(self) {
-        return self.plugins;
-    }
-}
\ No newline at end of file
diff --git a/mist-test/src/task.mist b/mist-test/src/task.mist
deleted file mode 100644
index a90f9e3..0000000
--- a/mist-test/src/task.mist
+++ /dev/null
@@ -1,20 +0,0 @@
-pub enum TaskState {
-    Pending,
-    Running,
-    Finished,
-    Failed,
-}
-
-pub struct Task {
-    pub String name,
-    pub TaskState state,
-    pub i32 executions,
-}
-
-pub Task create_task(str* name) {
-    Task {
-        name: name.to_string(),
-        state: TaskState::Pending,
-        executions: 0,
-    }
-}
\ No newline at end of file
diff --git a/mist-test/src/test_package.mist b/mist-test/src/test_package.mist
new file mode 100644
index 0000000..c35a53e
--- /dev/null
+++ b/mist-test/src/test_package.mist
@@ -0,0 +1,3 @@
+pub void hello() {
+    println!("Hello")
+}
\ No newline at end of file
diff --git a/src/main.mist b/src/main.mist
index 671bf6a..0c76e2d 100644
--- a/src/main.mist
+++ b/src/main.mist
@@ -14,7 +14,7 @@ void main() {
 
     match (args[1].as_str()) {
         "run" | "build" | "check" | "r" | "b" | "c" => {
-            var root = transpiler::build(false);
+            var root = transpiler::transpile();
 
             println!("");
 
@@ -25,7 +25,7 @@ void main() {
             }
         }
         "transpile" | "t" => {
-            transpiler::build(args.get(2).is_some());
+            transpiler::transpile();
         }
         "init" => {
             init_project(args);