feat(chat): add /changedir (/cd) slash command to change workdir mid-session

Allows changing the working directory without restarting the session:

  /changedir /path/to/project
  /cd ~/project/wezterm
  /cd          (goes to $HOME)

After changing directory, the user is prompted to run /code init
to reinitialize code intelligence for the new directory.

Author: sandikodev

crates/chat-cli/src/cli/chat/cli/changedir.rs

@@ -0,0 +1,53 @@
+use std::path::PathBuf;
+
+use clap::Args;
+use crossterm::{
+    execute,
+    style,
+};
+
+use crate::cli::chat::{
+    ChatError,
+    ChatSession,
+    ChatState,
+};
+use crate::theme::StyledText;
+
+#[derive(Debug, PartialEq, Args)]
+/// Arguments for the changedir command.
+pub struct ChangedirArgs {
+    /// The directory to switch to. Defaults to $HOME if not provided.
+    pub path: Option<PathBuf>,
+}
+
+impl ChangedirArgs {
+    pub async fn execute(self, session: &mut ChatSession) -> Result<ChatState, ChatError> {
+        let target = match self.path {
+            Some(p) => p,
+            None => dirs::home_dir().ok_or_else(|| ChatError::Custom("Could not determine home directory".into()))?,
+        };
+
+        let target = if target.is_relative() {
+            std::env::current_dir()
+                .map_err(|e| ChatError::Custom(e.to_string().into()))?
+                .join(&target)
+        } else {
+            target
+        };
+
+        std::env::set_current_dir(&target)
+            .map_err(|e| ChatError::Custom(format!("Failed to change directory: {e}").into()))?;
+
+        execute!(
+            session.stderr,
+            StyledText::success_fg(),
+            style::Print(format!("Working directory changed to: {}\n", target.display())),
+            style::Print("Run /code init to reinitialize code intelligence for this directory.\n"),
+            StyledText::reset(),
+        )?;
+
+        Ok(ChatState::PromptUser {
+            skip_printing_tools: true,
+        })
+    }
+}

crates/chat-cli/src/cli/chat/cli/mod.rs

@@ -1,5 +1,6 @@
 use crate::theme::StyledText;
 pub mod changelog;
+pub mod changedir;
 pub mod checkpoint;
 pub mod clear;
 pub mod compact;
@@ -23,6 +24,7 @@ pub mod tools;
 pub mod usage;
 
 use changelog::ChangelogArgs;
+use changedir::ChangedirArgs;
 use clap::Parser;
 use clear::ClearArgs;
 use compact::CompactArgs;
@@ -65,6 +67,9 @@ pub enum SlashCommand {
     Quit,
     /// Clear the conversation history
     Clear(ClearArgs),
+    /// Change the working directory for this session
+    #[command(name = "changedir", alias = "cd")]
+    Changedir(ChangedirArgs),
     /// Manage agents
     #[command(subcommand)]
     Agent(AgentSubcommand),
@@ -134,6 +139,7 @@ impl SlashCommand {
         match self {
             Self::Quit => Ok(ChatState::Exit),
             Self::Clear(args) => args.execute(session).await,
+            Self::Changedir(args) => args.execute(session).await,
             Self::Agent(subcommand) => subcommand.execute(os, session).await,
             Self::Profile => {
                 use crossterm::{
@@ -203,6 +209,7 @@ impl SlashCommand {
         match self {
             Self::Quit => "quit",
             Self::Clear(_) => "clear",
+            Self::Changedir(_) => "changedir",
             Self::Agent(_) => "agent",
             Self::Profile => "profile",
             Self::Context(_) => "context",

crates/chat-cli/src/cli/mod.rs

@@ -378,7 +378,7 @@ mod test {
         });
 
         assert_eq!(Cli::parse_from([CHAT_BINARY_NAME, "chat", "-vv"]), Cli {
-            subcommand: Some(RootSubcommand::Chat(ChatArgs {
+            subcommand: Some(RootSubcommand::Chat(ChatArgs { workdir: None,
                 resume: false,
                 input: None,
                 agent: None,
@@ -418,7 +418,7 @@ mod test {
     fn test_chat_with_context_profile() {
         assert_parse!(
             ["chat", "--profile", "my-profile"],
-            RootSubcommand::Chat(ChatArgs {
+            RootSubcommand::Chat(ChatArgs { workdir: None,
                 resume: false,
                 input: None,
                 agent: Some("my-profile".to_string()),
@@ -435,7 +435,7 @@ mod test {
     fn test_chat_with_context_profile_and_input() {
         assert_parse!(
             ["chat", "--profile", "my-profile", "Hello"],
-            RootSubcommand::Chat(ChatArgs {
+            RootSubcommand::Chat(ChatArgs { workdir: None,
                 resume: false,
                 input: Some("Hello".to_string()),
                 agent: Some("my-profile".to_string()),
@@ -452,7 +452,7 @@ mod test {
     fn test_chat_with_context_profile_and_accept_all() {
         assert_parse!(
             ["chat", "--profile", "my-profile", "--trust-all-tools"],
-            RootSubcommand::Chat(ChatArgs {
+            RootSubcommand::Chat(ChatArgs { workdir: None,
                 resume: false,
                 input: None,
                 agent: Some("my-profile".to_string()),
@@ -469,7 +469,7 @@ mod test {
     fn test_chat_with_no_interactive_and_resume() {
         assert_parse!(
             ["chat", "--no-interactive", "--resume"],
-            RootSubcommand::Chat(ChatArgs {
+            RootSubcommand::Chat(ChatArgs { workdir: None,
                 resume: true,
                 input: None,
                 agent: None,
@@ -482,7 +482,7 @@ mod test {
         );
         assert_parse!(
             ["chat", "--non-interactive", "-r"],
-            RootSubcommand::Chat(ChatArgs {
+            RootSubcommand::Chat(ChatArgs { workdir: None,
                 resume: true,
                 input: None,
                 agent: None,
@@ -499,7 +499,7 @@ mod test {
     fn test_chat_with_tool_trust_all() {
         assert_parse!(
             ["chat", "--trust-all-tools"],
-            RootSubcommand::Chat(ChatArgs {
+            RootSubcommand::Chat(ChatArgs { workdir: None,
                 resume: false,
                 input: None,
                 agent: None,
@@ -516,7 +516,7 @@ mod test {
     fn test_chat_with_tool_trust_none() {
         assert_parse!(
             ["chat", "--trust-tools="],
-            RootSubcommand::Chat(ChatArgs {
+            RootSubcommand::Chat(ChatArgs { workdir: None,
                 resume: false,
                 input: None,
                 agent: None,
@@ -533,7 +533,7 @@ mod test {
     fn test_chat_with_tool_trust_some() {
         assert_parse!(
             ["chat", "--trust-tools=fs_read,fs_write"],
-            RootSubcommand::Chat(ChatArgs {
+            RootSubcommand::Chat(ChatArgs { workdir: None,
                 resume: false,
                 input: None,
                 agent: None,
@@ -550,7 +550,7 @@ mod test {
     fn test_chat_with_different_wrap_modes() {
         assert_parse!(
             ["chat", "-w", "never"],
-            RootSubcommand::Chat(ChatArgs {
+            RootSubcommand::Chat(ChatArgs { workdir: None,
                 resume: false,
                 input: None,
                 agent: None,
@@ -563,7 +563,7 @@ mod test {
         );
         assert_parse!(
             ["chat", "--wrap", "always"],
-            RootSubcommand::Chat(ChatArgs {
+            RootSubcommand::Chat(ChatArgs { workdir: None,
                 resume: false,
                 input: None,
                 agent: None,
@@ -576,7 +576,7 @@ mod test {
         );
         assert_parse!(
             ["chat", "--wrap", "auto"],
-            RootSubcommand::Chat(ChatArgs {
+            RootSubcommand::Chat(ChatArgs { workdir: None,
                 resume: false,
                 input: None,
                 agent: None,