Add mise language support

.github/workflows/ci.yml

@@ -19,6 +19,8 @@ env:
   NODE_VERSION: "20"
   BUN_VERSION: "1.3"
   GO_VERSION: "1.24"
+  # The mise tests install 2026.7.18 separately to cover managed downloads.
+  MISE_VERSION: "2026.8.3"
   PYTHON_VERSION: "3.12"
   PHP_VERSION: "8.4"
   RUBY_VERSION: "3.4"
@@ -557,6 +559,17 @@ jobs:
           # Dummy dependency path to satisfy required input while enabling caching
           cache-dependency-path: LICENSE
 
+      - name: "Install mise"
+        if: ${{ contains(format(' {0} ', matrix.languages), ' mise ') }}
+        uses: jdx/mise-action@7e36c90d9ab29c415a2384db3006f3ec8a8cc654 # v4.2.4
+        with:
+          version: ${{ env.MISE_VERSION }}
+          install: false
+          cache: false
+          env: false
+          add_shims_to_path: false
+          working_directory: ${{ runner.temp }}
+
       - name: "Install Lua"
         if: ${{ contains(format(' {0} ', matrix.languages), ' lua ') }}
         uses: leafo/gh-actions-lua@6919171ccf181b826f44b9bca76307b577217377 # v13.0.0

AGENTS.md

@@ -5,7 +5,8 @@
 - Prefer the smallest coherent change. Reuse existing mechanisms and avoid wrappers
   or abstractions for speculative or unmeasured gains.
 - Prefer direct `if` or `match` control flow and explicit state types over clever
-  combinators, wrappers, or invalid boolean/`Option` combinations.
+  combinators, wrappers, or invalid boolean/`Option` combinations. Prefer plain
+  `if`/`else` to `.then()` or `.then_some()`.
 - Try hard to avoid `panic!`, `unreachable!`, `.unwrap()`, and `.expect()`. Encode
   those constraints in the type system instead. More explicit code or a larger
   refactor is acceptable when it avoids these calls.

README.md

@@ -359,7 +359,7 @@ prek self update
 ### prek is easier to work with
 
 - No need to install Python or any other runtime just to use `prek`; it is a single binary.
-- Its [language support](https://prek.j178.dev/languages/) covers every language available in `pre-commit`, plus Bun, Deno, and PHP, and it automatically installs managed toolchains when needed for Python, Node.js, Bun, Deno, Go, Rust, and Ruby.
+- Its [language support](https://prek.j178.dev/languages/) covers every language available in `pre-commit`, plus Bun, Deno, mise, and PHP, and it automatically installs managed toolchains when needed for Python, Node.js, Bun, Deno, Go, mise, Rust, and Ruby.
 - It supports native [`prek.toml`](https://prek.j178.dev/configuration/) in addition to pre-commit YAML, and [`prek util yaml-to-toml`](https://prek.j178.dev/reference/cli/#prek-util-yaml-to-toml) helps migrate existing configs.
 - Built-in support for [workspaces](https://prek.j178.dev/workspace/) means monorepos can keep separate configs per project and still run everything from one command, while independent same-depth projects run concurrently without mixing file scopes.
 - [`prek install`](https://prek.j178.dev/reference/cli/#prek-install) and [`prek uninstall`](https://prek.j178.dev/reference/cli/#prek-uninstall) honor repo-local and worktree-local `core.hooksPath`.

crates/prek-consts/src/env_vars.rs

@@ -111,6 +111,7 @@ impl EnvVars {
     pub const PREK_INTERNAL__DENO_BINARY_NAME: &'static str = "PREK_INTERNAL__DENO_BINARY_NAME";
     pub const PREK_INTERNAL__DOTNET_BINARY_NAME: &'static str = "PREK_INTERNAL_DOTNET_BINARY_NAME";
     pub const PREK_INTERNAL__GO_BINARY_NAME: &'static str = "PREK_INTERNAL__GO_BINARY_NAME";
+    pub const PREK_INTERNAL__MISE_BINARY_NAME: &'static str = "PREK_INTERNAL__MISE_BINARY_NAME";
     pub const PREK_INTERNAL__NODE_BINARY_NAME: &'static str = "PREK_INTERNAL__NODE_BINARY_NAME";
     pub const PREK_INTERNAL__RUSTUP_BINARY_NAME: &'static str = "PREK_INTERNAL__RUSTUP_BINARY_NAME";
     pub const PREK_INTERNAL__SKIP_CABAL_UPDATE: &'static str = "PREK_INTERNAL__SKIP_CABAL_UPDATE";
@@ -138,6 +139,18 @@ impl EnvVars {
     pub const DENO_DIR: &'static str = "DENO_DIR";
     pub const DENO_NO_UPDATE_CHECK: &'static str = "DENO_NO_UPDATE_CHECK";
 
+    // mise related
+    pub const MISE_DATA_DIR: &'static str = "MISE_DATA_DIR";
+    pub const MISE_CACHE_DIR: &'static str = "MISE_CACHE_DIR";
+    pub const MISE_CONFIG_DIR: &'static str = "MISE_CONFIG_DIR";
+    pub const MISE_STATE_DIR: &'static str = "MISE_STATE_DIR";
+    pub const MISE_SYSTEM_CONFIG_DIR: &'static str = "MISE_SYSTEM_CONFIG_DIR";
+    pub const MISE_SYSTEM_DATA_DIR: &'static str = "MISE_SYSTEM_DATA_DIR";
+    pub const MISE_TMP_DIR: &'static str = "MISE_TMP_DIR";
+    pub const MISE_CEILING_PATHS: &'static str = "MISE_CEILING_PATHS";
+    pub const MISE_NO_CONFIG: &'static str = "MISE_NO_CONFIG";
+    pub const MISE_SYSTEM_DEPS: &'static str = "MISE_SYSTEM_DEPS";
+
     // GitHub API authentication (to avoid rate limits)
     pub const GITHUB_TOKEN: &'static str = "GITHUB_TOKEN";
 

crates/prek/src/checksum.rs

@@ -101,8 +101,9 @@ pub(crate) fn digest_from_sha256sums(
             continue;
         };
         let name = name.trim();
-        // GNU-style checksum files may prefix binary-mode filenames with `*`.
+        // GNU entries use `*` for binary mode and may retain a leading `./` from the input path.
         let name = name.strip_prefix('*').unwrap_or(name);
+        let name = name.strip_prefix("./").unwrap_or(name);
         if name == filename {
             return digest.parse().map(Some);
         }
@@ -169,6 +170,16 @@ mod tests {
         Ok(())
     }
 
+    #[test]
+    fn parses_sha256sums_relative_filename() -> Result<()> {
+        let digest =
+            digest_from_sha256sums(&format!("{EMPTY_SHA256}  ./target.tar.gz"), "target.tar.gz")?
+                .context("expected target digest")?;
+
+        assert_eq!(digest.to_string(), EMPTY_SHA256);
+        Ok(())
+    }
+
     #[test]
     fn returns_none_for_missing_sha256sums_entry() -> Result<()> {
         let digest = digest_from_sha256sums(

crates/prek/src/config.rs

@@ -398,6 +398,7 @@ pub enum Language {
     Haskell,
     Julia,
     Lua,
+    Mise,
     Node,
     Perl,
     Php,