diff --git a/codex-rs/tui/src/chatwidget.rs b/codex-rs/tui/src/chatwidget.rs
index b09e030621..ef519d9052 100644
--- a/codex-rs/tui/src/chatwidget.rs
+++ b/codex-rs/tui/src/chatwidget.rs
@@ -1,6 +1,7 @@
 use std::collections::HashMap;
 use std::collections::VecDeque;
 use std::path::PathBuf;
+use std::process::Command;
 use std::sync::Arc;
 
 use codex_core::config::Config;
@@ -737,6 +738,14 @@ impl ChatWidget {
             SlashCommand::Approvals => {
                 self.open_approvals_popup();
             }
+            SlashCommand::Addprompt => {
+                let home = std::env::var("HOME").unwrap_or_else(|_| ".".to_string());
+                let prompts_dir = format!("{home}/.codex/");
+
+                if let Err(e) = Command::new("open").arg(&prompts_dir).spawn() {
+                    tracing::error!("failed to launch 'open prompts': {e}");
+                }
+            }
             SlashCommand::Quit => {
                 self.app_event_tx.send(AppEvent::ExitRequest);
             }
diff --git a/codex-rs/tui/src/slash_command.rs b/codex-rs/tui/src/slash_command.rs
index 6311661b28..ec7fee6a3d 100644
--- a/codex-rs/tui/src/slash_command.rs
+++ b/codex-rs/tui/src/slash_command.rs
@@ -14,6 +14,7 @@ pub enum SlashCommand {
     // more frequently used commands should be listed first.
     Model,
     Approvals,
+    Addprompt,
     New,
     Init,
     Compact,
@@ -40,6 +41,7 @@ impl SlashCommand {
             SlashCommand::Status => "show current session configuration and token usage",
             SlashCommand::Model => "choose what model and reasoning effort to use",
             SlashCommand::Approvals => "choose what Codex can do without approval",
+            SlashCommand::Addprompt => "open the prompts folder",
             SlashCommand::Mcp => "list configured MCP tools",
             SlashCommand::Logout => "log out of Codex",
             #[cfg(debug_assertions)]