1 files changed, 40 insertions, 1 deletions
diff --git a/crates/dinggerd/src/integrations.rs b/crates/dinggerd/src/integrations.rs
index a6378d1..d7cbd34 100644
--- a/crates/dinggerd/src/integrations.rs
+++ b/crates/dinggerd/src/integrations.rs
@@ -18,8 +18,47 @@ fn pi_extension_dir() -> Result<PathBuf, String> {
     Ok(base.join("extensions"))
 }
 
-/// Install the integration for one agent. Only pi has an integration today.
+/// zsh hook: records the command line running in each tmux pane exactly as
+/// typed (aliases, pipes, quoting), for restore to retype.
+const ZSH_HOOK: &str = r#"# installed by dingger; `dingger install zsh` overwrites this file.
+#
+# Records the command line running in this tmux pane, as typed, in the pane
+# option @dingger_cmd, so `dingger restore` can type it again (without
+# running it) after a crash or shutdown.
+if [[ -n $TMUX_PANE ]]; then
+  _dingger_preexec() { command tmux set-option -p -t "$TMUX_PANE" @dingger_cmd "$1" 2>/dev/null &! }
+  _dingger_precmd() { command tmux set-option -p -u -t "$TMUX_PANE" @dingger_cmd 2>/dev/null &! }
+  autoload -Uz add-zsh-hook
+  add-zsh-hook preexec _dingger_preexec
+  add-zsh-hook precmd _dingger_precmd
+fi
+"#;
+
+fn config_dir() -> Result<PathBuf, String> {
+    std::env::var_os("DINGGER_CONFIG_DIR")
+        .map(PathBuf::from)
+        .or_else(|| std::env::var_os("HOME").map(|home| PathBuf::from(home).join(".config").join("dingger")))
+        .ok_or_else(|| "cannot determine the config dir (no HOME)".to_string())
+}
+
+fn install_zsh() -> Result<(), String> {
+    let dir = config_dir()?;
+    std::fs::create_dir_all(&dir).map_err(|err| format!("mkdir failed: {err}"))?;
+    let path = dir.join("dingger.zsh");
+    std::fs::write(&path, ZSH_HOOK).map_err(|err| format!("write failed: {err}"))?;
+    println!(
+        "installed {}\nadd this line to your .zshrc (dingger does not edit it):\n\n  [[ -r {0} ]] && source {0}\n",
+        path.display()
+    );
+    Ok(())
+}
+
+/// Install an integration: an agent's state hooks, or `zsh` for retyping
+/// command lines on restore.
 pub fn install(agent: &str) -> Result<(), String> {
+    if agent == "zsh" {
+        return install_zsh();
+    }
     let parsed = detect_core::parse_agent_label(agent)
         .ok_or_else(|| format!("unknown agent: {agent}"))?;
     match parsed {