fix(commands): wire workspace slash command

rust/crates/commands/src/lib.rs

@@ -1131,6 +1131,9 @@ pub enum SlashCommand {
     SecurityReview,
     Keybindings,
     PrivacySettings,
+    Workspace {
+        path: Option<String>,
+    },
     Plan {
         mode: Option<String>,
     },
@@ -1272,6 +1275,7 @@ impl SlashCommand {
             Self::SecurityReview => "/security-review",
             Self::Keybindings => "/keybindings",
             Self::PrivacySettings => "/privacy-settings",
+            Self::Workspace { .. } => "/workspace",
             Self::Plan { .. } => "/plan",
             Self::Review { .. } => "/review",
             Self::Tasks { .. } => "/tasks",
@@ -1405,6 +1409,9 @@ pub fn validate_slash_command_input(
             validate_no_args(command, &args)?;
             SlashCommand::Setup
         }
+        "workspace" | "cwd" => SlashCommand::Workspace {
+            path: optional_single_arg(command, &args, "[path]")?,
+        },
         "login" | "logout" => {
             return Err(command_error(
                 "This auth flow was removed. Set ANTHROPIC_API_KEY or ANTHROPIC_AUTH_TOKEN instead.",
@@ -5342,6 +5349,7 @@ pub fn handle_slash_command(
         | SlashCommand::Cost
         | SlashCommand::Resume { .. }
         | SlashCommand::Config { .. }
+        | SlashCommand::Workspace { .. }
         | SlashCommand::Mcp { .. }
         | SlashCommand::Memory
         | SlashCommand::Init
@@ -6119,6 +6127,24 @@ mod tests {
         assert_eq!(suggest_slash_commands("zzz", 3), Vec::<String>::new());
     }
 
+    #[test]
+    fn parses_workspace_slash_command_and_alias() {
+        let workspace = validate_slash_command_input("/workspace")
+            .expect("workspace should parse")
+            .expect("workspace should be a slash command");
+        assert_eq!(workspace, SlashCommand::Workspace { path: None });
+
+        let cwd = validate_slash_command_input("/cwd src")
+            .expect("cwd alias should parse")
+            .expect("cwd alias should be a slash command");
+        assert_eq!(
+            cwd,
+            SlashCommand::Workspace {
+                path: Some("src".to_string()),
+            }
+        );
+    }
+
     #[test]
     fn compacts_sessions_via_slash_command() {
         let mut session = Session::new();

rust/crates/rusty-claude-cli/src/main.rs

@@ -6654,6 +6654,49 @@ fn run_resume_command(
             message: Some(render_memory_report()?),
             json: Some(render_memory_json()?),
         }),
+        SlashCommand::Workspace { path } => {
+            let cwd_before = env::current_dir()?;
+            let workspace_root = session
+                .workspace_root()
+                .map(Path::to_path_buf)
+                .unwrap_or_else(|| cwd_before.clone());
+            let workspace_root = canonicalize_or_clone(&workspace_root);
+            let changed = if let Some(path) = path.as_deref() {
+                let requested_path = Path::new(path);
+                let resolved_path = if requested_path.is_absolute() {
+                    requested_path.to_path_buf()
+                } else {
+                    cwd_before.join(requested_path)
+                };
+                let resolved_path = canonicalize_or_clone(&resolved_path);
+                if !resolved_path.starts_with(&workspace_root) {
+                    return Err(format!(
+                        "workspace_change_outside_root: `{}` is outside the current workspace root `{}`.\nUse `claw --cwd {}` to start a new session there.",
+                        resolved_path.display(),
+                        workspace_root.display(),
+                        resolved_path.display(),
+                    )
+                    .into());
+                }
+                env::set_current_dir(&resolved_path)?;
+                true
+            } else {
+                false
+            };
+            let cwd_after = env::current_dir()?;
+            let message =
+                render_workspace_report(&cwd_after, &workspace_root, &session.session_id, changed);
+            Ok(ResumeCommandOutcome {
+                session: session.clone(),
+                message: Some(message),
+                json: Some(workspace_report_json(
+                    &cwd_after,
+                    &workspace_root,
+                    &session.session_id,
+                    changed,
+                )),
+            })
+        }
         SlashCommand::Init => {
             // #142: run the init once, then render both text + structured JSON
             // from the same InitReport so both surfaces stay in sync.
@@ -8122,6 +8165,7 @@ impl LiveCli {
                 Self::print_config(section.as_deref())?;
                 false
             }
+            SlashCommand::Workspace { path } => self.handle_workspace_command(path.as_deref())?,
             SlashCommand::Mcp { action, target } => {
                 let args = match (action.as_deref(), target.as_deref()) {
                     (None, None) => None,
@@ -8280,6 +8324,51 @@ impl LiveCli {
         );
     }
 
+    fn handle_workspace_command(
+        &mut self,
+        target: Option<&str>,
+    ) -> Result<bool, Box<dyn std::error::Error>> {
+        let current_dir = env::current_dir()?;
+        let workspace_root = self
+            .runtime
+            .session()
+            .workspace_root()
+            .map(Path::to_path_buf)
+            .unwrap_or_else(|| current_dir.clone());
+        let workspace_root = canonicalize_or_clone(&workspace_root);
+
+        if let Some(target) = target {
+            let requested_path = Path::new(target);
+            let resolved_path = if requested_path.is_absolute() {
+                requested_path.to_path_buf()
+            } else {
+                current_dir.join(requested_path)
+            };
+            let resolved_path = canonicalize_or_clone(&resolved_path);
+            if !resolved_path.starts_with(&workspace_root) {
+                return Err(format!(
+                    "workspace_change_outside_root: `{}` is outside the current workspace root `{}`.\nUse `claw --cwd {}` to start a new session there.",
+                    resolved_path.display(),
+                    workspace_root.display(),
+                    resolved_path.display(),
+                )
+                .into());
+            }
+            env::set_current_dir(&resolved_path)?;
+        }
+
+        println!(
+            "{}",
+            render_workspace_report(
+                &env::current_dir()?,
+                &workspace_root,
+                &self.session.id,
+                target.is_some(),
+            )
+        );
+        Ok(target.is_some())
+    }
+
     fn record_prompt_history(&mut self, prompt: &str) {
         let timestamp_ms = std::time::SystemTime::now()
             .duration_since(UNIX_EPOCH)
@@ -9111,6 +9200,41 @@ fn new_cli_session() -> Result<Session, Box<dyn std::error::Error>> {
     Ok(Session::new().with_workspace_root(env::current_dir()?))
 }
 
+fn canonicalize_or_clone(path: &Path) -> PathBuf {
+    fs::canonicalize(path).unwrap_or_else(|_| path.to_path_buf())
+}
+
+fn render_workspace_report(
+    cwd: &Path,
+    workspace_root: &Path,
+    session_id: &str,
+    changed: bool,
+) -> String {
+    let action = if changed { "change" } else { "show" };
+    format!(
+        "Workspace\n  Action           {action}\n  Session          {session_id}\n  Workspace root   {}\n  Current directory {}",
+        workspace_root.display(),
+        cwd.display(),
+    )
+}
+
+fn workspace_report_json(
+    cwd: &Path,
+    workspace_root: &Path,
+    session_id: &str,
+    changed: bool,
+) -> Value {
+    serde_json::json!({
+        "kind": "workspace",
+        "action": if changed { "change" } else { "show" },
+        "status": "ok",
+        "session_id": session_id,
+        "workspace_root": workspace_root.display().to_string(),
+        "current_directory": cwd.display().to_string(),
+        "changed": changed,
+    })
+}
+
 fn create_managed_session_handle(
     session_id: &str,
 ) -> Result<SessionHandle, Box<dyn std::error::Error>> {