diff --git a/Cargo.toml b/Cargo.toml
index fdbaabd..3f875f3 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,47 +1,9 @@
-[package]
-name = "grass"
-version = "0.12.1"
-description = "A Sass compiler written purely in Rust"
-readme = "README.md"
-license = "MIT"
-categories = ["command-line-utilities", "web-programming"]
-keywords = ["scss", "sass", "css", "web"]
-repository = "https://github.com/connorskees/grass"
-authors = ["ConnorSkees <39542938+ConnorSkees@users.noreply.github.com>"]
-edition = "2021"
-include = ["src", "Cargo.toml", "README.md", "CHANGELOG.md", "Cargo.lock", "LICENSE"]
-default-run = "grass"
-
-[[bin]]
-name = "grass"
-path = "src/main.rs"
-required-features = ["commandline"]
-
-[lib]
-name = "grass"
-path = "src/lib.rs"
-# crate-type = ["cdylib", "rlib"]
-bench = false
-
-[dependencies]
-grass_internal = { path = "./grass_internal", version = "0.12.1" }
-include_sass = { path = "./include_sass", version = "0.12.1", optional = true }
-clap = { version = "2.34.0", optional = true }
-
-[features]
-# todo: no commandline by default
-default = ["commandline", "random"]
-# Option (enabled by default): build a binary using clap
-commandline = ["clap"]
-random = ["grass_internal/random"]
-wasm-exports = ["grass_internal/wasm-exports"]
-# Option: include the proc macro `include_sass!`
-macro = ["include_sass"]
-nightly = ["include_sass/nightly"]
-
-[dev-dependencies]
-tempfile = "3.3.0"
-paste = "1.0.3"
+[workspace]
+members = [
+    "crates/compiler",
+    "crates/include_sass",
+    "crates/lib",
+]
 
 [profile.release]
 debug = true
diff --git a/grass_internal/Cargo.toml b/crates/compiler/Cargo.toml
similarity index 95%
rename from grass_internal/Cargo.toml
rename to crates/compiler/Cargo.toml
index b2e115f..05098ad 100644
--- a/grass_internal/Cargo.toml
+++ b/crates/compiler/Cargo.toml
@@ -1,12 +1,12 @@
 [package]
-name = "grass_internal"
+name = "compiler"
 version = "0.12.1"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [lib]
-name = "grass_internal"
+name = "compiler"
 path = "src/lib.rs"
 # crate-type = ["cdylib", "rlib"]
 bench = false
diff --git a/crates/compiler/input.scss b/crates/compiler/input.scss
new file mode 100644
index 0000000..0ac7fce
--- /dev/null
+++ b/crates/compiler/input.scss
@@ -0,0 +1,3 @@
+a {
+    color: red;
+}
\ No newline at end of file
diff --git a/grass_internal/src/ast/args.rs b/crates/compiler/src/ast/args.rs
similarity index 100%
rename from grass_internal/src/ast/args.rs
rename to crates/compiler/src/ast/args.rs
diff --git a/grass_internal/src/ast/css.rs b/crates/compiler/src/ast/css.rs
similarity index 100%
rename from grass_internal/src/ast/css.rs
rename to crates/compiler/src/ast/css.rs
diff --git a/grass_internal/src/ast/expr.rs b/crates/compiler/src/ast/expr.rs
similarity index 100%
rename from grass_internal/src/ast/expr.rs
rename to crates/compiler/src/ast/expr.rs
diff --git a/grass_internal/src/ast/interpolation.rs b/crates/compiler/src/ast/interpolation.rs
similarity index 100%
rename from grass_internal/src/ast/interpolation.rs
rename to crates/compiler/src/ast/interpolation.rs
diff --git a/grass_internal/src/ast/media.rs b/crates/compiler/src/ast/media.rs
similarity index 100%
rename from grass_internal/src/ast/media.rs
rename to crates/compiler/src/ast/media.rs
diff --git a/grass_internal/src/ast/mixin.rs b/crates/compiler/src/ast/mixin.rs
similarity index 100%
rename from grass_internal/src/ast/mixin.rs
rename to crates/compiler/src/ast/mixin.rs
diff --git a/grass_internal/src/ast/mod.rs b/crates/compiler/src/ast/mod.rs
similarity index 100%
rename from grass_internal/src/ast/mod.rs
rename to crates/compiler/src/ast/mod.rs
diff --git a/grass_internal/src/ast/stmt.rs b/crates/compiler/src/ast/stmt.rs
similarity index 100%
rename from grass_internal/src/ast/stmt.rs
rename to crates/compiler/src/ast/stmt.rs
diff --git a/grass_internal/src/ast/style.rs b/crates/compiler/src/ast/style.rs
similarity index 100%
rename from grass_internal/src/ast/style.rs
rename to crates/compiler/src/ast/style.rs
diff --git a/grass_internal/src/ast/unknown.rs b/crates/compiler/src/ast/unknown.rs
similarity index 100%
rename from grass_internal/src/ast/unknown.rs
rename to crates/compiler/src/ast/unknown.rs
diff --git a/grass_internal/src/builtin/functions/color/hsl.rs b/crates/compiler/src/builtin/functions/color/hsl.rs
similarity index 100%
rename from grass_internal/src/builtin/functions/color/hsl.rs
rename to crates/compiler/src/builtin/functions/color/hsl.rs
diff --git a/grass_internal/src/builtin/functions/color/hwb.rs b/crates/compiler/src/builtin/functions/color/hwb.rs
similarity index 100%
rename from grass_internal/src/builtin/functions/color/hwb.rs
rename to crates/compiler/src/builtin/functions/color/hwb.rs
diff --git a/grass_internal/src/builtin/functions/color/mod.rs b/crates/compiler/src/builtin/functions/color/mod.rs
similarity index 100%
rename from grass_internal/src/builtin/functions/color/mod.rs
rename to crates/compiler/src/builtin/functions/color/mod.rs
diff --git a/grass_internal/src/builtin/functions/color/opacity.rs b/crates/compiler/src/builtin/functions/color/opacity.rs
similarity index 100%
rename from grass_internal/src/builtin/functions/color/opacity.rs
rename to crates/compiler/src/builtin/functions/color/opacity.rs
diff --git a/grass_internal/src/builtin/functions/color/other.rs b/crates/compiler/src/builtin/functions/color/other.rs
similarity index 100%
rename from grass_internal/src/builtin/functions/color/other.rs
rename to crates/compiler/src/builtin/functions/color/other.rs
diff --git a/grass_internal/src/builtin/functions/color/rgb.rs b/crates/compiler/src/builtin/functions/color/rgb.rs
similarity index 100%
rename from grass_internal/src/builtin/functions/color/rgb.rs
rename to crates/compiler/src/builtin/functions/color/rgb.rs
diff --git a/grass_internal/src/builtin/functions/list.rs b/crates/compiler/src/builtin/functions/list.rs
similarity index 100%
rename from grass_internal/src/builtin/functions/list.rs
rename to crates/compiler/src/builtin/functions/list.rs
diff --git a/grass_internal/src/builtin/functions/macros.rs b/crates/compiler/src/builtin/functions/macros.rs
similarity index 100%
rename from grass_internal/src/builtin/functions/macros.rs
rename to crates/compiler/src/builtin/functions/macros.rs
diff --git a/grass_internal/src/builtin/functions/map.rs b/crates/compiler/src/builtin/functions/map.rs
similarity index 100%
rename from grass_internal/src/builtin/functions/map.rs
rename to crates/compiler/src/builtin/functions/map.rs
diff --git a/grass_internal/src/builtin/functions/math.rs b/crates/compiler/src/builtin/functions/math.rs
similarity index 100%
rename from grass_internal/src/builtin/functions/math.rs
rename to crates/compiler/src/builtin/functions/math.rs
diff --git a/grass_internal/src/builtin/functions/meta.rs b/crates/compiler/src/builtin/functions/meta.rs
similarity index 100%
rename from grass_internal/src/builtin/functions/meta.rs
rename to crates/compiler/src/builtin/functions/meta.rs
diff --git a/grass_internal/src/builtin/functions/mod.rs b/crates/compiler/src/builtin/functions/mod.rs
similarity index 100%
rename from grass_internal/src/builtin/functions/mod.rs
rename to crates/compiler/src/builtin/functions/mod.rs
diff --git a/grass_internal/src/builtin/functions/selector.rs b/crates/compiler/src/builtin/functions/selector.rs
similarity index 100%
rename from grass_internal/src/builtin/functions/selector.rs
rename to crates/compiler/src/builtin/functions/selector.rs
diff --git a/grass_internal/src/builtin/functions/string.rs b/crates/compiler/src/builtin/functions/string.rs
similarity index 100%
rename from grass_internal/src/builtin/functions/string.rs
rename to crates/compiler/src/builtin/functions/string.rs
diff --git a/grass_internal/src/builtin/mod.rs b/crates/compiler/src/builtin/mod.rs
similarity index 100%
rename from grass_internal/src/builtin/mod.rs
rename to crates/compiler/src/builtin/mod.rs
diff --git a/grass_internal/src/builtin/modules/color.rs b/crates/compiler/src/builtin/modules/color.rs
similarity index 100%
rename from grass_internal/src/builtin/modules/color.rs
rename to crates/compiler/src/builtin/modules/color.rs
diff --git a/grass_internal/src/builtin/modules/list.rs b/crates/compiler/src/builtin/modules/list.rs
similarity index 100%
rename from grass_internal/src/builtin/modules/list.rs
rename to crates/compiler/src/builtin/modules/list.rs
diff --git a/grass_internal/src/builtin/modules/map.rs b/crates/compiler/src/builtin/modules/map.rs
similarity index 100%
rename from grass_internal/src/builtin/modules/map.rs
rename to crates/compiler/src/builtin/modules/map.rs
diff --git a/grass_internal/src/builtin/modules/math.rs b/crates/compiler/src/builtin/modules/math.rs
similarity index 100%
rename from grass_internal/src/builtin/modules/math.rs
rename to crates/compiler/src/builtin/modules/math.rs
diff --git a/grass_internal/src/builtin/modules/meta.rs b/crates/compiler/src/builtin/modules/meta.rs
similarity index 100%
rename from grass_internal/src/builtin/modules/meta.rs
rename to crates/compiler/src/builtin/modules/meta.rs
diff --git a/grass_internal/src/builtin/modules/mod.rs b/crates/compiler/src/builtin/modules/mod.rs
similarity index 100%
rename from grass_internal/src/builtin/modules/mod.rs
rename to crates/compiler/src/builtin/modules/mod.rs
diff --git a/grass_internal/src/builtin/modules/selector.rs b/crates/compiler/src/builtin/modules/selector.rs
similarity index 100%
rename from grass_internal/src/builtin/modules/selector.rs
rename to crates/compiler/src/builtin/modules/selector.rs
diff --git a/grass_internal/src/builtin/modules/string.rs b/crates/compiler/src/builtin/modules/string.rs
similarity index 100%
rename from grass_internal/src/builtin/modules/string.rs
rename to crates/compiler/src/builtin/modules/string.rs
diff --git a/grass_internal/src/color/mod.rs b/crates/compiler/src/color/mod.rs
similarity index 100%
rename from grass_internal/src/color/mod.rs
rename to crates/compiler/src/color/mod.rs
diff --git a/grass_internal/src/color/name.rs b/crates/compiler/src/color/name.rs
similarity index 100%
rename from grass_internal/src/color/name.rs
rename to crates/compiler/src/color/name.rs
diff --git a/grass_internal/src/common.rs b/crates/compiler/src/common.rs
similarity index 100%
rename from grass_internal/src/common.rs
rename to crates/compiler/src/common.rs
diff --git a/grass_internal/src/context_flags.rs b/crates/compiler/src/context_flags.rs
similarity index 100%
rename from grass_internal/src/context_flags.rs
rename to crates/compiler/src/context_flags.rs
diff --git a/grass_internal/src/error.rs b/crates/compiler/src/error.rs
similarity index 100%
rename from grass_internal/src/error.rs
rename to crates/compiler/src/error.rs
diff --git a/grass_internal/src/evaluate/bin_op.rs b/crates/compiler/src/evaluate/bin_op.rs
similarity index 100%
rename from grass_internal/src/evaluate/bin_op.rs
rename to crates/compiler/src/evaluate/bin_op.rs
diff --git a/grass_internal/src/evaluate/css_tree.rs b/crates/compiler/src/evaluate/css_tree.rs
similarity index 100%
rename from grass_internal/src/evaluate/css_tree.rs
rename to crates/compiler/src/evaluate/css_tree.rs
diff --git a/grass_internal/src/evaluate/env.rs b/crates/compiler/src/evaluate/env.rs
similarity index 100%
rename from grass_internal/src/evaluate/env.rs
rename to crates/compiler/src/evaluate/env.rs
diff --git a/grass_internal/src/evaluate/mod.rs b/crates/compiler/src/evaluate/mod.rs
similarity index 100%
rename from grass_internal/src/evaluate/mod.rs
rename to crates/compiler/src/evaluate/mod.rs
diff --git a/grass_internal/src/evaluate/scope.rs b/crates/compiler/src/evaluate/scope.rs
similarity index 100%
rename from grass_internal/src/evaluate/scope.rs
rename to crates/compiler/src/evaluate/scope.rs
diff --git a/grass_internal/src/evaluate/visitor.rs b/crates/compiler/src/evaluate/visitor.rs
similarity index 100%
rename from grass_internal/src/evaluate/visitor.rs
rename to crates/compiler/src/evaluate/visitor.rs
diff --git a/grass_internal/src/fs.rs b/crates/compiler/src/fs.rs
similarity index 100%
rename from grass_internal/src/fs.rs
rename to crates/compiler/src/fs.rs
diff --git a/grass_internal/src/interner.rs b/crates/compiler/src/interner.rs
similarity index 100%
rename from grass_internal/src/interner.rs
rename to crates/compiler/src/interner.rs
diff --git a/grass_internal/src/lexer.rs b/crates/compiler/src/lexer.rs
similarity index 100%
rename from grass_internal/src/lexer.rs
rename to crates/compiler/src/lexer.rs
diff --git a/grass_internal/src/lib.rs b/crates/compiler/src/lib.rs
similarity index 98%
rename from grass_internal/src/lib.rs
rename to crates/compiler/src/lib.rs
index a420266..fc247bc 100644
--- a/grass_internal/src/lib.rs
+++ b/crates/compiler/src/lib.rs
@@ -14,6 +14,7 @@ implementation.
 
 ## Use as library
 ```
+# use compiler as grass;
 fn main() -> Result<(), Box<grass::Error>> {
     let css = grass::from_string(
         "a { b { color: &; } }".to_owned(),
@@ -186,6 +187,7 @@ fn from_string_with_file_name<P: AsRef<Path>>(
 /// n.b. `grass` does not currently support files or paths that are not valid UTF-8
 ///
 /// ```
+/// # use compiler as grass;
 /// fn main() -> Result<(), Box<grass::Error>> {
 ///     let css = grass::from_path("input.scss", &grass::Options::default())?;
 ///     Ok(())
@@ -199,6 +201,7 @@ pub fn from_path<P: AsRef<Path>>(p: P, options: &Options) -> Result<String> {
 /// Compile CSS from a string
 ///
 /// ```
+/// # use compiler as grass;
 /// fn main() -> Result<(), Box<grass::Error>> {
 ///     let css = grass::from_string("a { b { color: &; } }".to_string(), &grass::Options::default())?;
 ///     assert_eq!(css, "a b {\n  color: a b;\n}\n");
diff --git a/grass_internal/src/options.rs b/crates/compiler/src/options.rs
similarity index 100%
rename from grass_internal/src/options.rs
rename to crates/compiler/src/options.rs
diff --git a/grass_internal/src/parse/at_root_query.rs b/crates/compiler/src/parse/at_root_query.rs
similarity index 100%
rename from grass_internal/src/parse/at_root_query.rs
rename to crates/compiler/src/parse/at_root_query.rs
diff --git a/grass_internal/src/parse/base.rs b/crates/compiler/src/parse/base.rs
similarity index 100%
rename from grass_internal/src/parse/base.rs
rename to crates/compiler/src/parse/base.rs
diff --git a/grass_internal/src/parse/css.rs b/crates/compiler/src/parse/css.rs
similarity index 100%
rename from grass_internal/src/parse/css.rs
rename to crates/compiler/src/parse/css.rs
diff --git a/grass_internal/src/parse/keyframes.rs b/crates/compiler/src/parse/keyframes.rs
similarity index 100%
rename from grass_internal/src/parse/keyframes.rs
rename to crates/compiler/src/parse/keyframes.rs
diff --git a/grass_internal/src/parse/media_query.rs b/crates/compiler/src/parse/media_query.rs
similarity index 100%
rename from grass_internal/src/parse/media_query.rs
rename to crates/compiler/src/parse/media_query.rs
diff --git a/grass_internal/src/parse/mod.rs b/crates/compiler/src/parse/mod.rs
similarity index 100%
rename from grass_internal/src/parse/mod.rs
rename to crates/compiler/src/parse/mod.rs
diff --git a/grass_internal/src/parse/sass.rs b/crates/compiler/src/parse/sass.rs
similarity index 100%
rename from grass_internal/src/parse/sass.rs
rename to crates/compiler/src/parse/sass.rs
diff --git a/grass_internal/src/parse/scss.rs b/crates/compiler/src/parse/scss.rs
similarity index 100%
rename from grass_internal/src/parse/scss.rs
rename to crates/compiler/src/parse/scss.rs
diff --git a/grass_internal/src/parse/stylesheet.rs b/crates/compiler/src/parse/stylesheet.rs
similarity index 100%
rename from grass_internal/src/parse/stylesheet.rs
rename to crates/compiler/src/parse/stylesheet.rs
diff --git a/grass_internal/src/parse/value.rs b/crates/compiler/src/parse/value.rs
similarity index 100%
rename from grass_internal/src/parse/value.rs
rename to crates/compiler/src/parse/value.rs
diff --git a/grass_internal/src/selector/attribute.rs b/crates/compiler/src/selector/attribute.rs
similarity index 100%
rename from grass_internal/src/selector/attribute.rs
rename to crates/compiler/src/selector/attribute.rs
diff --git a/grass_internal/src/selector/common.rs b/crates/compiler/src/selector/common.rs
similarity index 100%
rename from grass_internal/src/selector/common.rs
rename to crates/compiler/src/selector/common.rs
diff --git a/grass_internal/src/selector/complex.rs b/crates/compiler/src/selector/complex.rs
similarity index 100%
rename from grass_internal/src/selector/complex.rs
rename to crates/compiler/src/selector/complex.rs
diff --git a/grass_internal/src/selector/compound.rs b/crates/compiler/src/selector/compound.rs
similarity index 100%
rename from grass_internal/src/selector/compound.rs
rename to crates/compiler/src/selector/compound.rs
diff --git a/grass_internal/src/selector/extend/extended_selector.rs b/crates/compiler/src/selector/extend/extended_selector.rs
similarity index 100%
rename from grass_internal/src/selector/extend/extended_selector.rs
rename to crates/compiler/src/selector/extend/extended_selector.rs
diff --git a/grass_internal/src/selector/extend/extension.rs b/crates/compiler/src/selector/extend/extension.rs
similarity index 100%
rename from grass_internal/src/selector/extend/extension.rs
rename to crates/compiler/src/selector/extend/extension.rs
diff --git a/grass_internal/src/selector/extend/functions.rs b/crates/compiler/src/selector/extend/functions.rs
similarity index 100%
rename from grass_internal/src/selector/extend/functions.rs
rename to crates/compiler/src/selector/extend/functions.rs
diff --git a/grass_internal/src/selector/extend/merged.rs b/crates/compiler/src/selector/extend/merged.rs
similarity index 100%
rename from grass_internal/src/selector/extend/merged.rs
rename to crates/compiler/src/selector/extend/merged.rs
diff --git a/grass_internal/src/selector/extend/mod.rs b/crates/compiler/src/selector/extend/mod.rs
similarity index 100%
rename from grass_internal/src/selector/extend/mod.rs
rename to crates/compiler/src/selector/extend/mod.rs
diff --git a/grass_internal/src/selector/extend/rule.rs b/crates/compiler/src/selector/extend/rule.rs
similarity index 100%
rename from grass_internal/src/selector/extend/rule.rs
rename to crates/compiler/src/selector/extend/rule.rs
diff --git a/grass_internal/src/selector/list.rs b/crates/compiler/src/selector/list.rs
similarity index 100%
rename from grass_internal/src/selector/list.rs
rename to crates/compiler/src/selector/list.rs
diff --git a/grass_internal/src/selector/mod.rs b/crates/compiler/src/selector/mod.rs
similarity index 100%
rename from grass_internal/src/selector/mod.rs
rename to crates/compiler/src/selector/mod.rs
diff --git a/grass_internal/src/selector/parse.rs b/crates/compiler/src/selector/parse.rs
similarity index 100%
rename from grass_internal/src/selector/parse.rs
rename to crates/compiler/src/selector/parse.rs
diff --git a/grass_internal/src/selector/simple.rs b/crates/compiler/src/selector/simple.rs
similarity index 100%
rename from grass_internal/src/selector/simple.rs
rename to crates/compiler/src/selector/simple.rs
diff --git a/grass_internal/src/serializer.rs b/crates/compiler/src/serializer.rs
similarity index 100%
rename from grass_internal/src/serializer.rs
rename to crates/compiler/src/serializer.rs
diff --git a/grass_internal/src/unit/conversion.rs b/crates/compiler/src/unit/conversion.rs
similarity index 100%
rename from grass_internal/src/unit/conversion.rs
rename to crates/compiler/src/unit/conversion.rs
diff --git a/grass_internal/src/unit/mod.rs b/crates/compiler/src/unit/mod.rs
similarity index 100%
rename from grass_internal/src/unit/mod.rs
rename to crates/compiler/src/unit/mod.rs
diff --git a/grass_internal/src/utils/chars.rs b/crates/compiler/src/utils/chars.rs
similarity index 100%
rename from grass_internal/src/utils/chars.rs
rename to crates/compiler/src/utils/chars.rs
diff --git a/grass_internal/src/utils/map_view.rs b/crates/compiler/src/utils/map_view.rs
similarity index 100%
rename from grass_internal/src/utils/map_view.rs
rename to crates/compiler/src/utils/map_view.rs
diff --git a/grass_internal/src/utils/mod.rs b/crates/compiler/src/utils/mod.rs
similarity index 100%
rename from grass_internal/src/utils/mod.rs
rename to crates/compiler/src/utils/mod.rs
diff --git a/grass_internal/src/utils/strings.rs b/crates/compiler/src/utils/strings.rs
similarity index 100%
rename from grass_internal/src/utils/strings.rs
rename to crates/compiler/src/utils/strings.rs
diff --git a/grass_internal/src/value/arglist.rs b/crates/compiler/src/value/arglist.rs
similarity index 100%
rename from grass_internal/src/value/arglist.rs
rename to crates/compiler/src/value/arglist.rs
diff --git a/grass_internal/src/value/calculation.rs b/crates/compiler/src/value/calculation.rs
similarity index 100%
rename from grass_internal/src/value/calculation.rs
rename to crates/compiler/src/value/calculation.rs
diff --git a/grass_internal/src/value/map.rs b/crates/compiler/src/value/map.rs
similarity index 100%
rename from grass_internal/src/value/map.rs
rename to crates/compiler/src/value/map.rs
diff --git a/grass_internal/src/value/mod.rs b/crates/compiler/src/value/mod.rs
similarity index 100%
rename from grass_internal/src/value/mod.rs
rename to crates/compiler/src/value/mod.rs
diff --git a/grass_internal/src/value/number.rs b/crates/compiler/src/value/number.rs
similarity index 100%
rename from grass_internal/src/value/number.rs
rename to crates/compiler/src/value/number.rs
diff --git a/grass_internal/src/value/sass_function.rs b/crates/compiler/src/value/sass_function.rs
similarity index 100%
rename from grass_internal/src/value/sass_function.rs
rename to crates/compiler/src/value/sass_function.rs
diff --git a/grass_internal/src/value/sass_number.rs b/crates/compiler/src/value/sass_number.rs
similarity index 100%
rename from grass_internal/src/value/sass_number.rs
rename to crates/compiler/src/value/sass_number.rs
diff --git a/include_sass/Cargo.toml b/crates/include_sass/Cargo.toml
similarity index 83%
rename from include_sass/Cargo.toml
rename to crates/include_sass/Cargo.toml
index 10bb742..69c89a8 100644
--- a/include_sass/Cargo.toml
+++ b/crates/include_sass/Cargo.toml
@@ -8,7 +8,7 @@ proc-macro = true
 
 [dependencies]
 syn = { version = "1.0.103", default-features = false }
-grass_internal = { path = "../grass_internal" }
+compiler = { path = "../compiler" }
 quote = { version = "1.0.23", default-features = false }
 
 [features]
diff --git a/include_sass/src/lib.rs b/crates/include_sass/src/lib.rs
similarity index 89%
rename from include_sass/src/lib.rs
rename to crates/include_sass/src/lib.rs
index ca83277..7274b95 100644
--- a/include_sass/src/lib.rs
+++ b/crates/include_sass/src/lib.rs
@@ -2,7 +2,7 @@
 
 use std::{cell::RefCell, collections::HashSet, path::PathBuf};
 
-use grass_internal::StdFs;
+use compiler::StdFs;
 use proc_macro::TokenStream;
 use quote::format_ident;
 use syn::{parse_macro_input, LitStr};
@@ -12,10 +12,10 @@ use quote::__private::TokenStream as TokenStream2;
 #[derive(Debug)]
 struct FileTracker<'a> {
     files: RefCell<HashSet<PathBuf>>,
-    fs: &'a dyn grass_internal::Fs,
+    fs: &'a dyn compiler::Fs,
 }
 
-impl<'a> grass_internal::Fs for FileTracker<'a> {
+impl<'a> compiler::Fs for FileTracker<'a> {
     fn is_dir(&self, path: &std::path::Path) -> bool {
         #[cfg(feature = "nightly")]
         if let Ok(p) = std::fs::canonicalize(path) {
@@ -88,7 +88,7 @@ fn finish(css: String, files: &HashSet<PathBuf>) -> TokenStream {
 pub fn include_sass(item: TokenStream) -> TokenStream {
     let input = parse_macro_input!(item as LitStr);
 
-    let options = grass_internal::Options::default();
+    let options = compiler::Options::default();
 
     let fs = FileTracker {
         files: RefCell::new(HashSet::new()),
@@ -97,11 +97,9 @@ pub fn include_sass(item: TokenStream) -> TokenStream {
 
     let value = input.value();
 
-    let css = match grass_internal::from_path(
+    let css = match compiler::from_path(
         value,
-        &options
-            .fs(&fs)
-            .style(grass_internal::OutputStyle::Compressed),
+        &options.fs(&fs).style(compiler::OutputStyle::Compressed),
     ) {
         Ok(css) => css,
         Err(e) => {
diff --git a/crates/lib/Cargo.toml b/crates/lib/Cargo.toml
new file mode 100644
index 0000000..2376d7f
--- /dev/null
+++ b/crates/lib/Cargo.toml
@@ -0,0 +1,50 @@
+[package]
+name = "grass"
+version = "0.12.1"
+description = "A Sass compiler written purely in Rust"
+readme = "README.md"
+license = "MIT"
+categories = ["command-line-utilities", "web-programming"]
+keywords = ["scss", "sass", "css", "web"]
+repository = "https://github.com/connorskees/grass"
+authors = ["ConnorSkees <39542938+ConnorSkees@users.noreply.github.com>"]
+edition = "2021"
+include = ["src", "Cargo.toml", "README.md", "CHANGELOG.md", "Cargo.lock", "LICENSE"]
+default-run = "grass"
+
+[[bin]]
+name = "grass"
+path = "src/main.rs"
+required-features = ["commandline"]
+
+[lib]
+name = "grass"
+path = "src/lib.rs"
+# crate-type = ["cdylib", "rlib"]
+bench = false
+
+[dependencies]
+compiler = { path = "../compiler", version = "0.12.1" }
+include_sass = { path = "../include_sass", version = "0.12.1", optional = true }
+clap = { version = "2.34.0", optional = true }
+
+[features]
+# todo: no commandline by default
+default = ["commandline", "random"]
+# Option (enabled by default): build a binary using clap
+commandline = ["clap"]
+random = ["compiler/random"]
+wasm-exports = ["compiler/wasm-exports"]
+# Option: include the proc macro `include_sass!`
+macro = ["include_sass"]
+nightly = ["include_sass/nightly"]
+
+[dev-dependencies]
+tempfile = "3.3.0"
+paste = "1.0.3"
+
+# [profile.release]
+# debug = true
+# panic = "abort"
+# lto = true
+# codegen-units = 1
diff --git a/src/lib.rs b/crates/lib/src/lib.rs
similarity index 98%
rename from src/lib.rs
rename to crates/lib/src/lib.rs
index 9cceb03..130cdf1 100644
--- a/src/lib.rs
+++ b/crates/lib/src/lib.rs
@@ -80,11 +80,11 @@ grass input.scss
     unknown_lints,
 )]
 
-pub use grass_internal::*;
+pub use compiler::*;
 
 /// Include CSS in your binary at compile time from a Sass source file
 ///
-/// ```ignore
+/// ```
 /// static CSS: &str = grass::include!("../static/_main.scss");
 /// ```
 ///
diff --git a/src/main.rs b/crates/lib/src/main.rs
similarity index 100%
rename from src/main.rs
rename to crates/lib/src/main.rs
diff --git a/tests/addition.rs b/crates/lib/tests/addition.rs
similarity index 100%
rename from tests/addition.rs
rename to crates/lib/tests/addition.rs
diff --git a/tests/and.rs b/crates/lib/tests/and.rs
similarity index 100%
rename from tests/and.rs
rename to crates/lib/tests/and.rs
diff --git a/tests/arglist.rs b/crates/lib/tests/arglist.rs
similarity index 100%
rename from tests/arglist.rs
rename to crates/lib/tests/arglist.rs
diff --git a/tests/args.rs b/crates/lib/tests/args.rs
similarity index 100%
rename from tests/args.rs
rename to crates/lib/tests/args.rs
diff --git a/tests/at-error.rs b/crates/lib/tests/at-error.rs
similarity index 100%
rename from tests/at-error.rs
rename to crates/lib/tests/at-error.rs
diff --git a/tests/at-root.rs b/crates/lib/tests/at-root.rs
similarity index 100%
rename from tests/at-root.rs
rename to crates/lib/tests/at-root.rs
diff --git a/tests/calc_args.rs b/crates/lib/tests/calc_args.rs
similarity index 100%
rename from tests/calc_args.rs
rename to crates/lib/tests/calc_args.rs
diff --git a/tests/charset.rs b/crates/lib/tests/charset.rs
similarity index 100%
rename from tests/charset.rs
rename to crates/lib/tests/charset.rs
diff --git a/tests/clamp.rs b/crates/lib/tests/clamp.rs
similarity index 100%
rename from tests/clamp.rs
rename to crates/lib/tests/clamp.rs
diff --git a/tests/color.rs b/crates/lib/tests/color.rs
similarity index 100%
rename from tests/color.rs
rename to crates/lib/tests/color.rs
diff --git a/tests/color_hsl.rs b/crates/lib/tests/color_hsl.rs
similarity index 100%
rename from tests/color_hsl.rs
rename to crates/lib/tests/color_hsl.rs
diff --git a/tests/color_hwb.rs b/crates/lib/tests/color_hwb.rs
similarity index 100%
rename from tests/color_hwb.rs
rename to crates/lib/tests/color_hwb.rs
diff --git a/tests/comments.rs b/crates/lib/tests/comments.rs
similarity index 100%
rename from tests/comments.rs
rename to crates/lib/tests/comments.rs
diff --git a/tests/compressed.rs b/crates/lib/tests/compressed.rs
similarity index 100%
rename from tests/compressed.rs
rename to crates/lib/tests/compressed.rs
diff --git a/tests/content-exists.rs b/crates/lib/tests/content-exists.rs
similarity index 100%
rename from tests/content-exists.rs
rename to crates/lib/tests/content-exists.rs
diff --git a/tests/custom-property.rs b/crates/lib/tests/custom-property.rs
similarity index 100%
rename from tests/custom-property.rs
rename to crates/lib/tests/custom-property.rs
diff --git a/tests/debug.rs b/crates/lib/tests/debug.rs
similarity index 100%
rename from tests/debug.rs
rename to crates/lib/tests/debug.rs
diff --git a/tests/division.rs b/crates/lib/tests/division.rs
similarity index 100%
rename from tests/division.rs
rename to crates/lib/tests/division.rs
diff --git a/tests/each.rs b/crates/lib/tests/each.rs
similarity index 100%
rename from tests/each.rs
rename to crates/lib/tests/each.rs
diff --git a/tests/equality.rs b/crates/lib/tests/equality.rs
similarity index 100%
rename from tests/equality.rs
rename to crates/lib/tests/equality.rs
diff --git a/tests/error.rs b/crates/lib/tests/error.rs
similarity index 100%
rename from tests/error.rs
rename to crates/lib/tests/error.rs
diff --git a/tests/extend.rs b/crates/lib/tests/extend.rs
similarity index 100%
rename from tests/extend.rs
rename to crates/lib/tests/extend.rs
diff --git a/tests/for.rs b/crates/lib/tests/for.rs
similarity index 100%
rename from tests/for.rs
rename to crates/lib/tests/for.rs
diff --git a/tests/forward.rs b/crates/lib/tests/forward.rs
similarity index 100%
rename from tests/forward.rs
rename to crates/lib/tests/forward.rs
diff --git a/tests/functions.rs b/crates/lib/tests/functions.rs
similarity index 100%
rename from tests/functions.rs
rename to crates/lib/tests/functions.rs
diff --git a/tests/get-function.rs b/crates/lib/tests/get-function.rs
similarity index 100%
rename from tests/get-function.rs
rename to crates/lib/tests/get-function.rs
diff --git a/tests/if.rs b/crates/lib/tests/if.rs
similarity index 100%
rename from tests/if.rs
rename to crates/lib/tests/if.rs
diff --git a/tests/important.rs b/crates/lib/tests/important.rs
similarity index 100%
rename from tests/important.rs
rename to crates/lib/tests/important.rs
diff --git a/tests/imports.rs b/crates/lib/tests/imports.rs
similarity index 100%
rename from tests/imports.rs
rename to crates/lib/tests/imports.rs
diff --git a/tests/include_sass.rs b/crates/lib/tests/include_sass.rs
similarity index 100%
rename from tests/include_sass.rs
rename to crates/lib/tests/include_sass.rs
diff --git a/tests/inspect.rs b/crates/lib/tests/inspect.rs
similarity index 100%
rename from tests/inspect.rs
rename to crates/lib/tests/inspect.rs
diff --git a/tests/interpolation.rs b/crates/lib/tests/interpolation.rs
similarity index 100%
rename from tests/interpolation.rs
rename to crates/lib/tests/interpolation.rs
diff --git a/tests/is-superselector.rs b/crates/lib/tests/is-superselector.rs
similarity index 100%
rename from tests/is-superselector.rs
rename to crates/lib/tests/is-superselector.rs
diff --git a/tests/keyframes.rs b/crates/lib/tests/keyframes.rs
similarity index 100%
rename from tests/keyframes.rs
rename to crates/lib/tests/keyframes.rs
diff --git a/tests/keywords.rs b/crates/lib/tests/keywords.rs
similarity index 100%
rename from tests/keywords.rs
rename to crates/lib/tests/keywords.rs
diff --git a/tests/large.rs b/crates/lib/tests/large.rs
similarity index 100%
rename from tests/large.rs
rename to crates/lib/tests/large.rs
diff --git a/tests/list.rs b/crates/lib/tests/list.rs
similarity index 100%
rename from tests/list.rs
rename to crates/lib/tests/list.rs
diff --git a/tests/macros.rs b/crates/lib/tests/macros.rs
similarity index 100%
rename from tests/macros.rs
rename to crates/lib/tests/macros.rs
diff --git a/tests/map.rs b/crates/lib/tests/map.rs
similarity index 100%
rename from tests/map.rs
rename to crates/lib/tests/map.rs
diff --git a/tests/math-module.rs b/crates/lib/tests/math-module.rs
similarity index 100%
rename from tests/math-module.rs
rename to crates/lib/tests/math-module.rs
diff --git a/tests/math.rs b/crates/lib/tests/math.rs
similarity index 100%
rename from tests/math.rs
rename to crates/lib/tests/math.rs
diff --git a/tests/media.rs b/crates/lib/tests/media.rs
similarity index 100%
rename from tests/media.rs
rename to crates/lib/tests/media.rs
diff --git a/tests/meta-module.rs b/crates/lib/tests/meta-module.rs
similarity index 100%
rename from tests/meta-module.rs
rename to crates/lib/tests/meta-module.rs
diff --git a/tests/meta.rs b/crates/lib/tests/meta.rs
similarity index 100%
rename from tests/meta.rs
rename to crates/lib/tests/meta.rs
diff --git a/tests/min-max.rs b/crates/lib/tests/min-max.rs
similarity index 100%
rename from tests/min-max.rs
rename to crates/lib/tests/min-max.rs
diff --git a/tests/misc.rs b/crates/lib/tests/misc.rs
similarity index 100%
rename from tests/misc.rs
rename to crates/lib/tests/misc.rs
diff --git a/tests/mixins.rs b/crates/lib/tests/mixins.rs
similarity index 100%
rename from tests/mixins.rs
rename to crates/lib/tests/mixins.rs
diff --git a/tests/modulo.rs b/crates/lib/tests/modulo.rs
similarity index 100%
rename from tests/modulo.rs
rename to crates/lib/tests/modulo.rs
diff --git a/tests/multiplication.rs b/crates/lib/tests/multiplication.rs
similarity index 100%
rename from tests/multiplication.rs
rename to crates/lib/tests/multiplication.rs
diff --git a/tests/nan.rs b/crates/lib/tests/nan.rs
similarity index 100%
rename from tests/nan.rs
rename to crates/lib/tests/nan.rs
diff --git a/tests/not.rs b/crates/lib/tests/not.rs
similarity index 100%
rename from tests/not.rs
rename to crates/lib/tests/not.rs
diff --git a/tests/null.rs b/crates/lib/tests/null.rs
similarity index 100%
rename from tests/null.rs
rename to crates/lib/tests/null.rs
diff --git a/tests/number.rs b/crates/lib/tests/number.rs
similarity index 100%
rename from tests/number.rs
rename to crates/lib/tests/number.rs
diff --git a/tests/or.rs b/crates/lib/tests/or.rs
similarity index 100%
rename from tests/or.rs
rename to crates/lib/tests/or.rs
diff --git a/tests/order-of-operations.rs b/crates/lib/tests/order-of-operations.rs
similarity index 100%
rename from tests/order-of-operations.rs
rename to crates/lib/tests/order-of-operations.rs
diff --git a/tests/ordering.rs b/crates/lib/tests/ordering.rs
similarity index 100%
rename from tests/ordering.rs
rename to crates/lib/tests/ordering.rs
diff --git a/tests/plain-css-fn.rs b/crates/lib/tests/plain-css-fn.rs
similarity index 100%
rename from tests/plain-css-fn.rs
rename to crates/lib/tests/plain-css-fn.rs
diff --git a/tests/plain-css.rs b/crates/lib/tests/plain-css.rs
similarity index 100%
rename from tests/plain-css.rs
rename to crates/lib/tests/plain-css.rs
diff --git a/tests/sass.rs b/crates/lib/tests/sass.rs
similarity index 100%
rename from tests/sass.rs
rename to crates/lib/tests/sass.rs
diff --git a/tests/scope.rs b/crates/lib/tests/scope.rs
similarity index 100%
rename from tests/scope.rs
rename to crates/lib/tests/scope.rs
diff --git a/tests/selector-append.rs b/crates/lib/tests/selector-append.rs
similarity index 100%
rename from tests/selector-append.rs
rename to crates/lib/tests/selector-append.rs
diff --git a/tests/selector-extend.rs b/crates/lib/tests/selector-extend.rs
similarity index 100%
rename from tests/selector-extend.rs
rename to crates/lib/tests/selector-extend.rs
diff --git a/tests/selector-nest.rs b/crates/lib/tests/selector-nest.rs
similarity index 100%
rename from tests/selector-nest.rs
rename to crates/lib/tests/selector-nest.rs
diff --git a/tests/selector-parse.rs b/crates/lib/tests/selector-parse.rs
similarity index 100%
rename from tests/selector-parse.rs
rename to crates/lib/tests/selector-parse.rs
diff --git a/tests/selector-replace.rs b/crates/lib/tests/selector-replace.rs
similarity index 100%
rename from tests/selector-replace.rs
rename to crates/lib/tests/selector-replace.rs
diff --git a/tests/selector-unify.rs b/crates/lib/tests/selector-unify.rs
similarity index 100%
rename from tests/selector-unify.rs
rename to crates/lib/tests/selector-unify.rs
diff --git a/tests/selectors.rs b/crates/lib/tests/selectors.rs
similarity index 100%
rename from tests/selectors.rs
rename to crates/lib/tests/selectors.rs
diff --git a/tests/simple-selectors.rs b/crates/lib/tests/simple-selectors.rs
similarity index 100%
rename from tests/simple-selectors.rs
rename to crates/lib/tests/simple-selectors.rs
diff --git a/tests/special-functions.rs b/crates/lib/tests/special-functions.rs
similarity index 100%
rename from tests/special-functions.rs
rename to crates/lib/tests/special-functions.rs
diff --git a/tests/splat.rs b/crates/lib/tests/splat.rs
similarity index 100%
rename from tests/splat.rs
rename to crates/lib/tests/splat.rs
diff --git a/tests/str-escape.rs b/crates/lib/tests/str-escape.rs
similarity index 100%
rename from tests/str-escape.rs
rename to crates/lib/tests/str-escape.rs
diff --git a/tests/strings.rs b/crates/lib/tests/strings.rs
similarity index 100%
rename from tests/strings.rs
rename to crates/lib/tests/strings.rs
diff --git a/tests/styles.rs b/crates/lib/tests/styles.rs
similarity index 100%
rename from tests/styles.rs
rename to crates/lib/tests/styles.rs
diff --git a/tests/subtraction.rs b/crates/lib/tests/subtraction.rs
similarity index 100%
rename from tests/subtraction.rs
rename to crates/lib/tests/subtraction.rs
diff --git a/tests/supports.rs b/crates/lib/tests/supports.rs
similarity index 100%
rename from tests/supports.rs
rename to crates/lib/tests/supports.rs
diff --git a/tests/unary.rs b/crates/lib/tests/unary.rs
similarity index 100%
rename from tests/unary.rs
rename to crates/lib/tests/unary.rs
diff --git a/tests/unicode-range.rs b/crates/lib/tests/unicode-range.rs
similarity index 100%
rename from tests/unicode-range.rs
rename to crates/lib/tests/unicode-range.rs
diff --git a/tests/units.rs b/crates/lib/tests/units.rs
similarity index 100%
rename from tests/units.rs
rename to crates/lib/tests/units.rs
diff --git a/tests/unknown-at-rule.rs b/crates/lib/tests/unknown-at-rule.rs
similarity index 100%
rename from tests/unknown-at-rule.rs
rename to crates/lib/tests/unknown-at-rule.rs
diff --git a/tests/url.rs b/crates/lib/tests/url.rs
similarity index 100%
rename from tests/url.rs
rename to crates/lib/tests/url.rs
diff --git a/tests/use.rs b/crates/lib/tests/use.rs
similarity index 100%
rename from tests/use.rs
rename to crates/lib/tests/use.rs
diff --git a/tests/values.rs b/crates/lib/tests/values.rs
similarity index 100%
rename from tests/values.rs
rename to crates/lib/tests/values.rs
diff --git a/tests/variables.rs b/crates/lib/tests/variables.rs
similarity index 100%
rename from tests/variables.rs
rename to crates/lib/tests/variables.rs
diff --git a/tests/warn.rs b/crates/lib/tests/warn.rs
similarity index 100%
rename from tests/warn.rs
rename to crates/lib/tests/warn.rs
diff --git a/tests/while.rs b/crates/lib/tests/while.rs
similarity index 100%
rename from tests/while.rs
rename to crates/lib/tests/while.rs
diff --git a/tests/whitespace.rs b/crates/lib/tests/whitespace.rs
similarity index 100%
rename from tests/whitespace.rs
rename to crates/lib/tests/whitespace.rs