diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 531b66b..afe8214 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,9 +2,9 @@ name: CI
 
 on:
   push:
-    branches: [ main ]
+    branches: [main]
   pull_request:
-    branches: [ main ]
+    branches: [main]
 
 env:
   CARGO_TERM_COLOR: always
@@ -20,42 +20,34 @@ jobs:
         rust: [stable]
 
     steps:
-    - uses: actions/checkout@v4
-
-    - name: Install Rust
-      uses: dtolnay/rust-toolchain@stable
-      with:
-        toolchain: ${{ matrix.rust }}
-        components: clippy, rustfmt
-
-    - name: Cache cargo registry
-      uses: actions/cache@v4
-      with:
-        path: ~/.cargo/registry
-        key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
-
-    - name: Cache cargo index
-      uses: actions/cache@v4
-      with:
-        path: ~/.cargo/git
-        key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
-
-    - name: Cache cargo build
-      uses: actions/cache@v4
-      with:
-        path: target
-        key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
-
-    - name: Run tests
-      run: cargo test --verbose
-
-    - name: Run clippy
-      run: cargo clippy --all-targets -- -D warnings
-
-    - name: Check formatting
-      run: cargo fmt -- --check
-
-    - name: Test sample-cli example
-      run: |
-        cd examples/sample-cli
-        cargo test --verbose
\ No newline at end of file
+      - uses: actions/checkout@v4
+
+      - name: Install Rust
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          toolchain: ${{ matrix.rust }}
+          components: clippy, rustfmt
+
+      - name: Cache cargo registry
+        uses: actions/cache@v4
+        with:
+          path: ~/.cargo/registry
+          key: ${{ runner.os }}-cargo-registry-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Cache cargo index
+        uses: actions/cache@v4
+        with:
+          path: ~/.cargo/git
+          key: ${{ runner.os }}-cargo-index-${{ hashFiles('**/Cargo.lock') }}
+
+      - name: Cache cargo build
+        uses: actions/cache@v4
+        with:
+          path: target
+          key: ${{ runner.os }}-cargo-build-target-${{ hashFiles('**/Cargo.lock') }}
+
+      - uses: pre-commit/action@v3.0.1
+      - run: cargo test --verbose
+      - run: |
+          cd examples/sample-cli
+          cargo test --verbose
diff --git a/.pre-commit-config.yaml b/.pre-commit-config.yaml
index d568e32..ed66cac 100644
--- a/.pre-commit-config.yaml
+++ b/.pre-commit-config.yaml
@@ -6,6 +6,7 @@ repos:
         name: Rust formatter
       - id: clippy
         name: Rust linter
-        args: ['--all-targets', '--', '-D', 'warnings']
+        args:
+          ["--fix", "--allow-dirty", "--all-targets", "--", "-D", "warnings"]
       - id: cargo-check
-        name: Rust compiler check
\ No newline at end of file
+        name: Rust compiler check
diff --git a/fuzz/fuzz_targets/env_substitution.rs b/fuzz/fuzz_targets/env_substitution.rs
index 05939f1..026f553 100644
--- a/fuzz/fuzz_targets/env_substitution.rs
+++ b/fuzz/fuzz_targets/env_substitution.rs
@@ -6,7 +6,7 @@ use testscript_rs::TestEnvironment;
 fuzz_target!(|data: &[u8]| {
     // Convert bytes to string, handling invalid UTF-8 gracefully
     let input = String::from_utf8_lossy(data);
-    
+
     // Create a test environment to test environment variable substitution
     if let Ok(mut env) = TestEnvironment::new() {
         // Add some test environment variables with potentially problematic values
@@ -20,40 +20,43 @@ fuzz_target!(|data: &[u8]| {
             ("NESTED", "${OTHER}"),
             ("OTHER", "value"),
         ];
-        
+
         for (key, value) in test_vars {
             env.env_vars.insert(key.to_string(), value.to_string());
         }
-        
+
         // Test environment variable substitution
         // This should never panic, regardless of input
         let result = env.substitute_env_vars(&input);
-        
+
         // Basic sanity check - result should be a valid string
         let _len = result.len();
-        
+
         // Test with some edge cases
         let edge_cases = vec![
-            format!("${{{}}}", input),  // ${input}
-            format!("${}", input),      // $input
+            format!("${{{}}}", input),     // ${input}
+            format!("${}", input),         // $input
             format!("{}${{WORK}}", input), // input${WORK}
             format!("${{WORK}}{}", input), // ${WORK}input
-            format!("$${}$$", input),   // $$input$$
+            format!("$${}$$", input),      // $$input$$
         ];
-        
+
         for edge_case in edge_cases {
             let _result = env.substitute_env_vars(&edge_case);
             // Should not panic
         }
-        
+
         // Test that substitution is idempotent for non-recursive cases
         let once = env.substitute_env_vars(&input);
         let twice = env.substitute_env_vars(&once);
-        
+
         // For most inputs, applying substitution twice should yield the same result
         // unless the first substitution introduced new variables to substitute
         if !once.contains('$') {
-            assert_eq!(once, twice, "Substitution should be idempotent when no $ remains");
+            assert_eq!(
+                once, twice,
+                "Substitution should be idempotent when no $ remains"
+            );
         }
     }
-});
\ No newline at end of file
+});
diff --git a/fuzz/fuzz_targets/parser.rs b/fuzz/fuzz_targets/parser.rs
index 03f20f3..ceecb60 100644
--- a/fuzz/fuzz_targets/parser.rs
+++ b/fuzz/fuzz_targets/parser.rs
@@ -6,11 +6,11 @@ use testscript_rs::parser;
 fuzz_target!(|data: &[u8]| {
     // Convert bytes to string, handling invalid UTF-8 gracefully
     let input = String::from_utf8_lossy(data);
-    
+
     // Fuzz the main parser function
     // The parser should never panic and always return a proper Result
     let result = parser::parse(&input);
-    
+
     // We don't care if parsing succeeds or fails, just that it doesn't panic
     // If it succeeds, verify the result is well-formed
     if let Ok(ref script) = result {
@@ -22,13 +22,13 @@ fuzz_target!(|data: &[u8]| {
             // Line number should be positive
             assert!(command.line_num > 0, "Invalid line number");
         }
-        
+
         for file in &script.files {
             // File name should not be empty if file exists
             assert!(!file.name.is_empty(), "Empty file name");
         }
     }
-    
+
     // Test that the parser is deterministic - same input should produce same result
     let result2 = parser::parse(&input);
     match (result.is_ok(), result2.is_ok()) {
diff --git a/fuzz/fuzz_targets/structured.rs b/fuzz/fuzz_targets/structured.rs
index 20c38be..f34b32f 100644
--- a/fuzz/fuzz_targets/structured.rs
+++ b/fuzz/fuzz_targets/structured.rs
@@ -28,19 +28,19 @@ struct FuzzFile {
 impl FuzzInput {
     fn to_txtar(&self) -> String {
         let mut result = String::new();
-        
+
         // Add commands
         for cmd in &self.commands {
             // Add condition prefix
             if let Some(ref condition) = cmd.condition {
                 result.push_str(&format!("[{}] ", condition));
             }
-            
+
             // Add negation
             if cmd.negated {
                 result.push_str("! ");
             }
-            
+
             // Add command name and args
             result.push_str(&cmd.name);
             for arg in &cmd.args {
@@ -51,15 +51,15 @@ impl FuzzInput {
                     result.push_str(&format!(" {}", arg));
                 }
             }
-            
+
             // Add background indicator
             if cmd.background {
                 result.push_str(" &");
             }
-            
+
             result.push('\n');
         }
-        
+
         // Add files
         for file in &self.files {
             result.push_str(&format!("-- {} --\n", file.name));
@@ -70,7 +70,7 @@ impl FuzzInput {
                 result.push('\n');
             }
         }
-        
+
         result
     }
 }
@@ -81,28 +81,31 @@ fuzz_target!(|data: &[u8]| {
     if let Ok(fuzz_input) = FuzzInput::arbitrary(&mut unstructured) {
         // Convert to txtar format
         let txtar_content = fuzz_input.to_txtar();
-        
+
         // Test the parser
         let result = parser::parse(&txtar_content);
-        
+
         // Verify parser doesn't panic and produces consistent results
         if let Ok(script) = result {
             // Validate the parsed structure
             // Note: parsed commands may be fewer than input due to empty lines, comments, etc.
-            assert!(script.commands.len() <= fuzz_input.commands.len().max(1000), "Too many commands parsed");
-            
+            assert!(
+                script.commands.len() <= fuzz_input.commands.len().max(1000),
+                "Too many commands parsed"
+            );
+
             for command in &script.commands {
                 assert!(!command.name.is_empty(), "Empty command name");
                 assert!(command.line_num > 0, "Invalid line number");
             }
-            
+
             for file in &script.files {
                 assert!(!file.name.is_empty(), "Empty file name");
             }
         }
     }
-    
+
     // Also test with raw bytes as backup for edge cases
     let raw_input = String::from_utf8_lossy(data);
     let _result = parser::parse(&raw_input);
-});
\ No newline at end of file
+});
diff --git a/fuzz/fuzz_targets/tokens.rs b/fuzz/fuzz_targets/tokens.rs
index 184249a..c0a44ca 100644
--- a/fuzz/fuzz_targets/tokens.rs
+++ b/fuzz/fuzz_targets/tokens.rs
@@ -5,15 +5,15 @@ use libfuzzer_sys::fuzz_target;
 fuzz_target!(|data: &[u8]| {
     // Convert bytes to string, handling invalid UTF-8 gracefully
     let input = String::from_utf8_lossy(data);
-    
+
     // We need to test the token parsing function, but it's private
     // So we test it indirectly through the public parser interface
     // Create minimal txtar content with the fuzzed command line
     let txtar_content = format!("{}\n", input);
-    
+
     // Fuzz through the main parser - this will exercise parse_command_tokens
     let result = testscript_rs::parser::parse(&txtar_content);
-    
+
     // The parser should never panic
     // If parsing succeeds, verify basic properties
     if let Ok(script) = result {
@@ -27,7 +27,7 @@ fuzz_target!(|data: &[u8]| {
             }
         }
     }
-    
+
     // Test with various command prefixes to exercise condition parsing
     if !input.trim().is_empty() && !input.starts_with('#') {
         let prefixes = ["", "[unix] ", "[!windows] ", "! "];
@@ -37,4 +37,4 @@ fuzz_target!(|data: &[u8]| {
             // Should not panic regardless of result
         }
     }
-});
\ No newline at end of file
+});