5 files changed, 38 insertions, 2 deletions
diff --git a/src/platform/fallback.rs b/src/platform/fallback.rs
index cdfbc157..64e5467b 100644
--- a/src/platform/fallback.rs
+++ b/src/platform/fallback.rs
@@ -3,6 +3,16 @@ use std::process::Command;
 
 use super::{ClipboardImage, ForegroundJob, Signal};
 
+#[cfg(unix)]
+pub(crate) use super::unix_common::set_default_plugin_pane_pwd;
+
+#[cfg(not(unix))]
+pub(crate) fn set_default_plugin_pane_pwd(
+    _env: &mut Vec<(String, String)>,
+    _cwd: &std::path::Path,
+) {
+}
+
 pub(crate) fn remote_ssh_config_paths() -> super::RemoteSshConfigPaths {
     super::RemoteSshConfigPaths {
         user_config: std::env::var_os("HOME")
diff --git a/src/platform/linux.rs b/src/platform/linux.rs
index b5c33259..fde57e57 100644
--- a/src/platform/linux.rs
+++ b/src/platform/linux.rs
@@ -16,7 +16,8 @@ pub(crate) use super::unix_common::{
     configure_status_command, create_remote_private_dir, create_remote_ssh_config_dir,
     create_remote_ssh_config_file, hostname, local_datetime, remote_bridge_endpoint_path,
     remote_private_temp_base, remote_reattach_argument, remote_reattach_program,
-    remote_ssh_config_paths, status_commands_supported, StatusCommandGuard,
+    remote_ssh_config_paths, set_default_plugin_pane_pwd, status_commands_supported,
+    StatusCommandGuard,
 };
 
 const WSL_MARKER_ENV_VARS: &[&str] = &["WSL_DISTRO_NAME", "WSL_INTEROP"];
diff --git a/src/platform/macos.rs b/src/platform/macos.rs
index 00fd2452..948468ac 100644
--- a/src/platform/macos.rs
+++ b/src/platform/macos.rs
@@ -16,7 +16,8 @@ pub(crate) use super::unix_common::{
     configure_status_command, create_remote_private_dir, create_remote_ssh_config_dir,
     create_remote_ssh_config_file, hostname, local_datetime, remote_bridge_endpoint_path,
     remote_private_temp_base, remote_reattach_argument, remote_reattach_program,
-    remote_ssh_config_paths, status_commands_supported, StatusCommandGuard,
+    remote_ssh_config_paths, set_default_plugin_pane_pwd, status_commands_supported,
+    StatusCommandGuard,
 };
 
 const PROC_PGRP_ONLY: u32 = 2;
diff --git a/src/platform/unix_common.rs b/src/platform/unix_common.rs
index b997049f..ce5bba00 100644
--- a/src/platform/unix_common.rs
+++ b/src/platform/unix_common.rs
@@ -228,11 +228,29 @@ fn datetime_from_tm(value: &libc::tm) -> Option<time::PrimitiveDateTime> {
     Some(time::PrimitiveDateTime::new(date, time))
 }
 
+pub(crate) fn set_default_plugin_pane_pwd(env: &mut Vec<(String, String)>, cwd: &std::path::Path) {
+    if !env.iter().any(|(key, _)| key == "PWD") {
+        env.push(("PWD".to_string(), cwd.display().to_string()));
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
 
     #[test]
+    fn plugin_pane_pwd_defaults_to_cwd_without_overriding_explicit_env() {
+        let cwd = Path::new("/plugin-cwd");
+        let mut derived = vec![("OTHER".to_string(), "value".to_string())];
+        set_default_plugin_pane_pwd(&mut derived, cwd);
+        assert!(derived.contains(&("PWD".to_string(), "/plugin-cwd".to_string())));
+
+        let mut explicit = vec![("PWD".to_string(), "/caller-pwd".to_string())];
+        set_default_plugin_pane_pwd(&mut explicit, cwd);
+        assert_eq!(explicit, [("PWD".to_string(), "/caller-pwd".to_string())]);
+    }
+
+    #[test]
     fn remote_ssh_config_dir_rejects_overlong_control_socket_name() {
         let err = create_remote_ssh_config_dir(&"x".repeat(200)).unwrap_err();
         assert_eq!(err.kind(), std::io::ErrorKind::InvalidInput);
diff --git a/src/platform/windows.rs b/src/platform/windows.rs
index 7aee384e..5d5b0141 100644
--- a/src/platform/windows.rs
+++ b/src/platform/windows.rs
@@ -15,6 +15,12 @@ use std::{
 
 mod clipboard_image;
 
+pub(crate) fn set_default_plugin_pane_pwd(
+    _env: &mut Vec<(String, String)>,
+    _cwd: &std::path::Path,
+) {
+}
+
 use windows_sys::{
     Wdk::System::Threading::{NtQueryInformationProcess, ProcessBasicInformation},
     Win32::{