diff --git a/cli/src/commands/mod.rs b/cli/src/commands/mod.rs
index a94e680bcbc..736c04af871 100644
--- a/cli/src/commands/mod.rs
+++ b/cli/src/commands/mod.rs
@@ -42,6 +42,7 @@ mod operation;
 mod prev;
 mod rebase;
 mod resolve;
+mod run;
 
 use std::collections::HashSet;
 use std::fmt::Debug;
@@ -129,7 +130,7 @@ enum Commands {
     Restore(RestoreArgs),
     #[command(hide = true)]
     // TODO: Flesh out.
-    Run(RunArgs),
+    Run(run::RunArgs),
     Show(ShowArgs),
     #[command(subcommand)]
     Sparse(SparseArgs),
@@ -280,29 +281,6 @@ struct RestoreArgs {
     revision: Option<RevisionArg>,
 }
 
-/// Run a command across a set of revisions.
-///
-///
-/// All recorded state will be persisted in the `.jj` directory, so occasionally
-/// a `jj run --clean` is needed to clean up disk space.
-///
-/// # Example
-///
-/// # Run pre-commit on your local work
-/// $ jj run 'pre-commit.py .github/pre-commit.yaml' -r (main..@) -j 4
-///
-/// This allows pre-commit integration and other funny stuff.
-#[derive(clap::Args, Clone, Debug)]
-#[command(verbatim_doc_comment)]
-struct RunArgs {
-    /// The command to run across all selected revisions.
-    #[arg(long, short, alias = "x")]
-    command: String,
-    /// The revisions to change.
-    #[arg(long, short, default_value = "@")]
-    revisions: Vec<RevisionArg>,
-}
-
 /// Split a revision in two
 ///
 /// Starts a diff editor (`meld` by default) on the changes in the revision.
@@ -1259,11 +1237,6 @@ don't make any changes, then the operation will be aborted.
     Ok(())
 }
 
-// TODO: Move to run.rs
-fn cmd_run(_ui: &mut Ui, _command: &CommandHelper, _args: &RunArgs) -> Result<(), CommandError> {
-    Err(user_error("This is a stub, do not use"))
-}
-
 fn make_branch_term(branch_names: &[impl fmt::Display]) -> String {
     match branch_names {
         [branch_name] => format!("branch {}", branch_name),
@@ -1668,7 +1641,7 @@ pub fn run_command(ui: &mut Ui, command_helper: &CommandHelper) -> Result<(), Co
         Commands::Squash(sub_args) => cmd_squash(ui, command_helper, sub_args),
         Commands::Unsquash(sub_args) => cmd_unsquash(ui, command_helper, sub_args),
         Commands::Restore(sub_args) => cmd_restore(ui, command_helper, sub_args),
-        Commands::Run(sub_args) => cmd_run(ui, command_helper, sub_args),
+        Commands::Run(sub_args) => run::cmd_run(ui, command_helper, sub_args),
         Commands::Diffedit(sub_args) => diffedit::cmd_diffedit(ui, command_helper, sub_args),
         Commands::Split(sub_args) => cmd_split(ui, command_helper, sub_args),
         Commands::Merge(sub_args) => merge::cmd_merge(ui, command_helper, sub_args),
diff --git a/cli/src/commands/run.rs b/cli/src/commands/run.rs
new file mode 100644
index 00000000000..6b1ebb261a2
--- /dev/null
+++ b/cli/src/commands/run.rs
@@ -0,0 +1,34 @@
+//! This file contains the internal implementation of `run`.
+use crate::cli_util::{user_error, CommandError, CommandHelper, RevisionArg};
+use crate::ui::Ui;
+
+/// Run a command across a set of revisions.
+///
+///
+/// All recorded state will be persisted in the `.jj` directory, so occasionally
+/// a `jj run --clean` is needed to clean up disk space.
+///
+/// # Example
+///
+/// # Run pre-commit on your local work
+/// $ jj run 'pre-commit.py .github/pre-commit.yaml' -r (main..@) -j 4
+///
+/// This allows pre-commit integration and other funny stuff.
+#[derive(clap::Args, Clone, Debug)]
+#[command(verbatim_doc_comment)]
+pub struct RunArgs {
+    /// The command to run across all selected revisions.
+    #[arg(long, short, alias = "x")]
+    command: String,
+    /// The revisions to change.
+    #[arg(long, short, default_value = "@")]
+    revisions: Vec<RevisionArg>,
+}
+
+pub fn cmd_run(
+    _ui: &mut Ui,
+    _command: &CommandHelper,
+    _args: &RunArgs,
+) -> Result<(), CommandError> {
+    Err(user_error("This is a stub, do not use"))
+}