diff --git a/gdn-cli/src/commands/repo.rs b/gdn-cli/src/commands/repo.rs
index b8a3660..f3689ad 100644
--- a/gdn-cli/src/commands/repo.rs
+++ b/gdn-cli/src/commands/repo.rs
@@ -2,6 +2,7 @@ mod add;
 mod info;
 mod list;
 mod remove;
+mod select;
 
 use clap::Parser;
 
@@ -18,6 +19,9 @@ pub enum Command {
     #[command(visible_alias = "i")]
     Info(info::Command),
 
+    #[command(visible_alias = "s")]
+    Select(select::Command),
+
     #[command(visible_alias = "a")]
     Add(add::Command),
 
@@ -30,6 +34,7 @@ impl Command {
         match self {
             Self::List(command) => command.run(env),
             Self::Info(command) => command.run(env),
+            Self::Select(command) => command.run(env),
             Self::Add(command) => command.run(env),
             Self::Remove(command) => command.run(env),
         }
diff --git a/gdn-cli/src/commands/repo/select.rs b/gdn-cli/src/commands/repo/select.rs
new file mode 100644
index 0000000..05de702
--- /dev/null
+++ b/gdn-cli/src/commands/repo/select.rs
@@ -0,0 +1,32 @@
+use clap::Parser;
+
+use crate::Environment;
+
+/// Select a repository.
+#[derive(Debug, Parser)]
+pub struct Command {
+    repo: String,
+}
+
+impl Command {
+    pub fn run(self, env: &Environment) -> anyhow::Result<()> {
+        let data = gdn::data::open_and_migrate(env.data_dir.clone())?;
+        let state = gdn::data::load_state(&data)?;
+
+        if self.repo.is_empty() {
+            println!("Deselecting repo");
+            gdn::data::select_repo(&data, None)?;
+            return Ok(());
+        }
+
+        let Some(id) = state.resolve_repo_identifier(&self.repo) else {
+            println!("No repo found for identifier {}.", self.repo);
+            return Ok(());
+        };
+
+        println!("Selecting repo {id}");
+        gdn::data::select_repo(&data, Some(id))?;
+
+        Ok(())
+    }
+}
diff --git a/gdn/src/data.rs b/gdn/src/data.rs
index b9d3771..39ede80 100644
--- a/gdn/src/data.rs
+++ b/gdn/src/data.rs
@@ -12,7 +12,10 @@ pub use crate::repo::VERSION as REPO_VERSION;
 
 pub use self::{
     datadir::{LockedDataDir, UnlockedDataDir},
-    v1::{State, VERSION, add_repo, load_repo, load_repo_version, load_state, remove_repo, tidy},
+    v1::{
+        State, VERSION, add_repo, load_repo, load_repo_version, load_state, remove_repo,
+        select_repo, tidy,
+    },
 };
 
 fn migrate(dir: &LockedDataDir) -> anyhow::Result<()> {