diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
new file mode 100644
index 0000000..dfa49b1
--- /dev/null
+++ b/.github/workflows/test.yml
@@ -0,0 +1,19 @@
+on:
+  push:
+    branches: ['main']
+  pull_request:
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  MISE_EXPERIMENTAL: 1
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+      - uses: jdx/mise-action@v2
+      - run: mise r ci
diff --git a/.mise.toml b/.mise.toml
index 322a934..99f0365 100644
--- a/.mise.toml
+++ b/.mise.toml
@@ -31,5 +31,11 @@ raw = true
 [tasks.test]
 run = 'cargo test --all --all-features'
 
-[tasks.insta]
-run = 'cargo test --all --all-features'
+[tasks.lint]
+run = 'cargo clippy --all --all-features -- -D warnings'
+
+[tasks.format-check]
+run = 'cargo fmt --all -- --check'
+
+[tasks.ci]
+depends = ['test', 'lint', 'format-check']
diff --git a/cli/src/cli/generate/markdown.rs b/cli/src/cli/generate/markdown.rs
index 492c043..cf1a618 100644
--- a/cli/src/cli/generate/markdown.rs
+++ b/cli/src/cli/generate/markdown.rs
@@ -1,3 +1,4 @@
+use std::fmt::{Display, Formatter};
 use std::fs;
 use std::fs::File;
 use std::io::Write;
@@ -162,6 +163,24 @@ enum UsageMdDirective {
     Plain(String),
 }
 
+impl Display for UsageMdDirective {
+    fn fmt(&self, f: &mut Formatter<'_>) -> std::fmt::Result {
+        match self {
+            UsageMdDirective::Load { file } => {
+                write!(f, "<!-- [USAGE] load file=\"{}\" -->", file.display())
+            }
+            UsageMdDirective::Title => write!(f, "<!-- [USAGE] title -->"),
+            UsageMdDirective::UsageOverview => write!(f, "<!-- [USAGE] usage_overview -->"),
+            UsageMdDirective::GlobalArgs => write!(f, "<!-- [USAGE] global_args -->"),
+            UsageMdDirective::GlobalFlags => write!(f, "<!-- [USAGE] global_flags -->"),
+            UsageMdDirective::CommandIndex => write!(f, "<!-- [USAGE] command_index -->"),
+            UsageMdDirective::Commands => write!(f, "<!-- [USAGE] commands -->"),
+            UsageMdDirective::EndToken => write!(f, "<!-- [USAGE] -->"),
+            UsageMdDirective::Plain(line) => write!(f, "{}", line),
+        }
+    }
+}
+
 struct UsageMdContext {
     plain: bool,
     spec: Option<Spec>,
@@ -191,13 +210,13 @@ impl UsageMdDirective {
             UsageMdDirective::Load { file } => {
                 let file = context::prepend_load_root(file);
                 ctx.spec = Some(fs::read_to_string(&file).into_diagnostic()?.parse()?);
-                ctx.push(format!("<!-- [USAGE] load file=\"{}\" -->", file.display()));
+                ctx.push(self.to_string());
             }
             UsageMdDirective::Title => {
                 ensure!(ctx.spec.is_some(), "spec must be loaded before title");
                 ctx.plain = false;
                 let spec = ctx.spec.as_ref().unwrap();
-                ctx.push(format!("<!-- [USAGE] title -->"));
+                ctx.push(self.to_string());
                 ctx.push(format!("# {name}", name = spec.name));
                 ctx.push(format!("<!-- [USAGE] -->"));
             }
@@ -205,7 +224,7 @@ impl UsageMdDirective {
                 ctx.plain = false;
                 let spec = ctx.spec.as_ref().unwrap();
 
-                ctx.push("<!-- [USAGE] usage_overview -->".to_string());
+                ctx.push(self.to_string());
                 ctx.push("```".to_string());
                 ctx.push(format!("{bin} [flags] [args]", bin = spec.bin));
                 ctx.push("```".to_string());
@@ -215,7 +234,7 @@ impl UsageMdDirective {
                 ctx.plain = false;
                 let spec = ctx.spec.as_ref().unwrap();
 
-                ctx.push("<!-- [USAGE] global_args -->".to_string());
+                ctx.push(self.to_string());
                 let args = spec.cmd.args.iter().filter(|a| !a.hide).collect::<Vec<_>>();
                 if !args.is_empty() {
                     for arg in args {
@@ -236,7 +255,7 @@ impl UsageMdDirective {
                 ctx.plain = false;
                 let spec = ctx.spec.as_ref().unwrap();
 
-                ctx.push("<!-- [USAGE] global_flags -->".to_string());
+                ctx.push(self.to_string());
                 let flags = spec
                     .cmd
                     .flags
@@ -261,14 +280,14 @@ impl UsageMdDirective {
             UsageMdDirective::CommandIndex => {
                 ctx.plain = false;
                 let spec = ctx.spec.as_ref().unwrap();
-                ctx.push(format!("<!-- [USAGE] command_index -->"));
+                ctx.push(self.to_string());
                 print_commands_index(&ctx, &[&spec.cmd])?;
                 ctx.push(format!("<!-- [USAGE] -->"));
             }
             UsageMdDirective::Commands => {
                 ctx.plain = false;
                 let spec = ctx.spec.as_ref().unwrap();
-                ctx.push(format!("<!-- [USAGE] commands -->"));
+                ctx.push(self.to_string());
                 print_commands(&ctx, &[&spec.cmd])?;
                 ctx.push(format!("<!-- [USAGE] -->"));
             }
diff --git a/examples/MISE_README.md b/examples/MISE_README.md
index 1a40531..5533edc 100644
--- a/examples/MISE_README.md
+++ b/examples/MISE_README.md
@@ -1,5 +1,4 @@
 <!-- [USAGE] load file="./mise.usage.kdl" -->
-<!-- [USAGE] load file="./mise.usage.kdl" -->
 <!-- [USAGE] title -->
 # mise
 <!-- [USAGE] -->
diff --git a/src/parse/spec.rs b/src/parse/spec.rs
index 8e6be11..0c294c9 100644
--- a/src/parse/spec.rs
+++ b/src/parse/spec.rs
@@ -1,11 +1,13 @@
-use crate::context::get_load_root;
-use crate::error::UsageErr;
-use crate::parse::cmd::SchemaCmd;
-use kdl::{KdlDocument, KdlEntry, KdlNode};
 use std::fmt::{Display, Formatter};
-use std::path::{Path, PathBuf};
+use std::path::Path;
 use std::str::FromStr;
-use xx::file;
+
+use kdl::{KdlDocument, KdlEntry, KdlNode};
+
+use xx::{context, file};
+
+use crate::error::UsageErr;
+use crate::parse::cmd::SchemaCmd;
 
 #[derive(Debug, Default)]
 pub struct Spec {
@@ -63,7 +65,7 @@ fn get_string_prop(node: &KdlNode, name: &str) -> Option<String> {
 
 impl FromStr for Spec {
     type Err = miette::Error;
-    fn from_str(input: &str) -> miette::Result<Spec> {
+    fn from_str(input: &str) -> Result<Spec, Self::Err> {
         let kdl: KdlDocument = input
             .parse()
             .map_err(|err: kdl::KdlError| UsageErr::KdlError(err))?;
@@ -81,15 +83,16 @@ impl FromStr for Spec {
                     schema.cmd.subcommands.insert(node.name.to_string(), node);
                 }
                 "include" => {
-                    let file = match get_string_prop(node, "file").map(PathBuf::from) {
-                        Some(file) if file.is_relative() => get_load_root().join(file),
-                        Some(file) => file.to_path_buf(),
-                        None => Err(UsageErr::InvalidInput(
-                            node.to_string(),
-                            *node.span(),
-                            input.to_string(),
-                        ))?,
-                    };
+                    let file = get_string_prop(node, "file")
+                        .map(context::prepend_load_root)
+                        .ok_or_else(|| {
+                            UsageErr::InvalidInput(
+                                node.to_string(),
+                                *node.span(),
+                                input.to_string(),
+                            )
+                        })?;
+                    ensure!(file.exists(), "File not found: {}", file.display());
                     info!("include: {}", file.display());
                     let (spec, _) = split_script(&file)?;
                     schema.merge(spec.parse()?);