diff --git a/crates/ruff/src/lib.rs b/crates/ruff/src/lib.rs
index af7e0bc065..e91bb0354e 100644
--- a/crates/ruff/src/lib.rs
+++ b/crates/ruff/src/lib.rs
@@ -131,6 +131,7 @@ pub fn run(
     }: Args,
 ) -> Result<ExitStatus> {
     {
+        ruff_db::set_program_version(crate::version::version().to_string()).unwrap();
         let default_panic_hook = std::panic::take_hook();
         std::panic::set_hook(Box::new(move |info| {
             #[expect(clippy::print_stderr)]
diff --git a/crates/ruff_db/src/lib.rs b/crates/ruff_db/src/lib.rs
index b501956807..2a152ace72 100644
--- a/crates/ruff_db/src/lib.rs
+++ b/crates/ruff_db/src/lib.rs
@@ -28,6 +28,21 @@ pub use web_time::{Instant, SystemTime, SystemTimeError};
 pub type FxDashMap<K, V> = dashmap::DashMap<K, V, BuildHasherDefault<FxHasher>>;
 pub type FxDashSet<K> = dashmap::DashSet<K, BuildHasherDefault<FxHasher>>;
 
+static VERSION: std::sync::OnceLock<String> = std::sync::OnceLock::new();
+
+/// Returns the version of the executing program if set.
+pub fn program_version() -> Option<&'static str> {
+    VERSION.get().map(|version| version.as_str())
+}
+
+/// Sets the version of the executing program.
+///
+/// ## Errors
+/// If the version has already been initialized (can only be set once).
+pub fn set_program_version(version: String) -> Result<(), String> {
+    VERSION.set(version)
+}
+
 /// Most basic database that gives access to files, the host system, source code, and parsed AST.
 #[salsa::db]
 pub trait Db: salsa::Database {
diff --git a/crates/ty/build.rs b/crates/ty/build.rs
index 98df7eae01..1cb3dbc589 100644
--- a/crates/ty/build.rs
+++ b/crates/ty/build.rs
@@ -7,13 +7,25 @@ use std::{
 fn main() {
     // The workspace root directory is not available without walking up the tree
     // https://github.com/rust-lang/cargo/issues/3946
-    let workspace_root = Path::new(&std::env::var("CARGO_MANIFEST_DIR").unwrap())
-        .join("..")
+    let ruff_workspace_root = Path::new(&std::env::var("CARGO_MANIFEST_DIR").unwrap())
         .join("..")
         .join("..");
+    let ty_workspace_root = ruff_workspace_root.join("..");
 
-    version_info(&workspace_root);
-    commit_info(&workspace_root);
+    version_info(&ty_workspace_root);
+
+    // If not in a git repository, do not attempt to retrieve commit information
+    let git_dir = ty_workspace_root.join(".git");
+    if git_dir.exists() {
+        commit_info(&git_dir, &ty_workspace_root, false);
+    } else {
+        // Try if we're inside the ruff repository and, if so, use that commit hash.
+        let git_dir = ruff_workspace_root.join(".git");
+
+        if git_dir.exists() {
+            commit_info(&git_dir, &ruff_workspace_root, true);
+        }
+    }
 
     let target = std::env::var("TARGET").unwrap();
     println!("cargo::rustc-env=RUST_HOST_TARGET={target}");
@@ -45,14 +57,8 @@ fn version_info(workspace_root: &Path) {
 }
 
 /// Retrieve commit information from the Git repository.
-fn commit_info(workspace_root: &Path) {
-    // If not in a git repository, do not attempt to retrieve commit information
-    let git_dir = workspace_root.join(".git");
-    if !git_dir.exists() {
-        return;
-    }
-
-    if let Some(git_head_path) = git_head(&git_dir) {
+fn commit_info(git_dir: &Path, workspace_root: &Path, is_ruff: bool) {
+    if let Some(git_head_path) = git_head(git_dir) {
         println!("cargo:rerun-if-changed={}", git_head_path.display());
 
         let git_head_contents = fs::read_to_string(git_head_path);
@@ -96,7 +102,10 @@ fn commit_info(workspace_root: &Path) {
         let mut describe_parts = describe.split('-');
         let last_tag = describe_parts.next().unwrap();
 
-        println!("cargo::rustc-env=TY_LAST_TAG={last_tag}");
+        println!(
+            "cargo::rustc-env=TY_LAST_TAG={ruff}{last_tag}",
+            ruff = if is_ruff { "ruff/" } else { "" }
+        );
 
         // If this is the tagged commit, this component will be missing
         println!(
diff --git a/crates/ty/src/lib.rs b/crates/ty/src/lib.rs
index 25f5085567..b9d7cbd8f9 100644
--- a/crates/ty/src/lib.rs
+++ b/crates/ty/src/lib.rs
@@ -33,6 +33,7 @@ use ty_server::run_server;
 
 pub fn run() -> anyhow::Result<ExitStatus> {
     setup_rayon();
+    ruff_db::set_program_version(crate::version::version().to_string()).unwrap();
 
     let args = wild::args_os();
     let args = argfile::expand_args_from(args, argfile::parse_fromfile, argfile::PREFIX)
diff --git a/crates/ty_project/src/lib.rs b/crates/ty_project/src/lib.rs
index 79778d93fa..ffff0204f5 100644
--- a/crates/ty_project/src/lib.rs
+++ b/crates/ty_project/src/lib.rs
@@ -667,6 +667,13 @@ where
                     arch = std::env::consts::ARCH
                 ),
             ));
+            if let Some(version) = ruff_db::program_version() {
+                diagnostic.sub(SubDiagnostic::new(
+                    Severity::Info,
+                    format!("Version: {version}"),
+                ));
+            }
+
             diagnostic.sub(SubDiagnostic::new(
                 Severity::Info,
                 format!(
diff --git a/crates/ty_server/src/lib.rs b/crates/ty_server/src/lib.rs
index 663565932c..f370e79c16 100644
--- a/crates/ty_server/src/lib.rs
+++ b/crates/ty_server/src/lib.rs
@@ -17,10 +17,6 @@ pub(crate) const DIAGNOSTIC_NAME: &str = "ty";
 /// result type is needed.
 pub(crate) type Result<T> = anyhow::Result<T>;
 
-pub(crate) fn version() -> &'static str {
-    env!("CARGO_PKG_VERSION")
-}
-
 pub fn run_server() -> anyhow::Result<()> {
     let four = NonZeroUsize::new(4).unwrap();
 
diff --git a/crates/ty_server/src/server.rs b/crates/ty_server/src/server.rs
index 779564a88b..c4d5845f7e 100644
--- a/crates/ty_server/src/server.rs
+++ b/crates/ty_server/src/server.rs
@@ -57,12 +57,10 @@ impl Server {
         let server_capabilities =
             Self::server_capabilities(position_encoding, global_options.diagnostic_mode());
 
-        let connection = connection.initialize_finish(
-            id,
-            &server_capabilities,
-            crate::SERVER_NAME,
-            crate::version(),
-        )?;
+        let version = ruff_db::program_version().unwrap_or("Unknown");
+
+        let connection =
+            connection.initialize_finish(id, &server_capabilities, crate::SERVER_NAME, version)?;
 
         // The number 32 was chosen arbitrarily. The main goal was to have enough capacity to queue
         // some responses before blocking.
@@ -74,6 +72,8 @@ impl Server {
             global_options.tracing.log_file.as_deref(),
         );
 
+        tracing::debug!("Version: {version}");
+
         let mut workspace_for_url = |url: Url| {
             let Some(workspace_settings) = workspace_options.as_mut() else {
                 return (url, ClientOptions::default());
diff --git a/crates/ty_wasm/src/lib.rs b/crates/ty_wasm/src/lib.rs
index 4533175828..4cf9662eaa 100644
--- a/crates/ty_wasm/src/lib.rs
+++ b/crates/ty_wasm/src/lib.rs
@@ -36,6 +36,8 @@ pub fn version() -> String {
 pub fn run() {
     use log::Level;
 
+    ruff_db::set_program_version(version()).unwrap();
+
     // When the `console_error_panic_hook` feature is enabled, we can call the
     // `set_panic_hook` function at least once during initialization, and then
     // we will get better error messages if our code ever panics.