Sidebar metadata + tagged reload isolation (#16)

* Sidebar primitives + tagged dev isolation

* Allow wider sidebar resize

* Fix tagged socket selection + panel id errors

* Fix progress label quoting + bundle suffix sanitize

* Skip ctrl-enter keybind test when keystrokes blocked

* Fix shell nc hang + prune stale per-surface sidebar metadata

scripts/reload.sh

@@ -183,6 +183,7 @@ if [[ -n "$TAG" && "$APP_NAME" != "$SEARCH_APP_NAME" ]]; then
       APP_SUPPORT_DIR="$HOME/Library/Application Support/cmuxterm"
       CMUXD_SOCKET="${APP_SUPPORT_DIR}/cmuxd-dev-${TAG_SLUG}.sock"
       CMUX_SOCKET="/tmp/cmuxterm-debug-${TAG_SLUG}.sock"
+      echo "$CMUX_SOCKET" > /tmp/cmuxterm-last-socket-path || true
       /usr/libexec/PlistBuddy -c "Add :LSEnvironment dict" "$INFO_PLIST" 2>/dev/null || true
       /usr/libexec/PlistBuddy -c "Set :LSEnvironment:CMUXD_UNIX_PATH \"${CMUXD_SOCKET}\"" "$INFO_PLIST" 2>/dev/null \
         || /usr/libexec/PlistBuddy -c "Add :LSEnvironment:CMUXD_UNIX_PATH string \"${CMUXD_SOCKET}\"" "$INFO_PLIST"
@@ -206,9 +207,12 @@ fi
 # Ensure any running instance is fully terminated, regardless of DerivedData path.
 /usr/bin/osascript -e "tell application id \"${BUNDLE_ID}\" to quit" >/dev/null 2>&1 || true
 sleep 0.3
-pkill -f "/${BASE_APP_NAME}.app/Contents/MacOS/${BASE_APP_NAME}" || true
-if [[ "${APP_NAME}" != "${BASE_APP_NAME}" ]]; then
-  pkill -f "/${APP_NAME}.app/Contents/MacOS/${APP_NAME}" || true
+if [[ -z "$TAG" ]]; then
+  # Non-tag mode: kill any running instance (across any DerivedData path) to avoid socket conflicts.
+  pkill -f "/${BASE_APP_NAME}.app/Contents/MacOS/${BASE_APP_NAME}" || true
+else
+  # Tag mode: only kill the tagged instance; allow side-by-side with the main app.
+  pkill -f "${APP_NAME}.app/Contents/MacOS/${BASE_APP_NAME}" || true
 fi
 sleep 0.3
 CMUXD_SRC="$PWD/cmuxd/zig-out/bin/cmuxd"
@@ -221,7 +225,33 @@ if [[ -x "$CMUXD_SRC" ]]; then
   cp "$CMUXD_SRC" "$BIN_DIR/cmuxd"
   chmod +x "$BIN_DIR/cmuxd"
 fi
-open "$APP_PATH"
+# Avoid inheriting cmuxterm/ghostty environment variables from the terminal that
+# runs this script (often inside another cmuxterm instance), which can cause
+# socket and resource-path conflicts.
+OPEN_CLEAN_ENV=(
+  env
+  -u CMUX_SOCKET_PATH
+  -u CMUX_TAB_ID
+  -u CMUX_PANEL_ID
+  -u CMUXD_UNIX_PATH
+  -u CMUX_TAG
+  -u CMUXTERM_TAG
+  -u CMUX_BUNDLE_ID
+  -u CMUXTERM_BUNDLE_ID
+  -u CMUX_SHELL_INTEGRATION
+  -u GHOSTTY_BIN_DIR
+  -u GHOSTTY_RESOURCES_DIR
+  -u GHOSTTY_SHELL_FEATURES
+  -u TERMINFO
+  -u XDG_DATA_DIRS
+)
+
+if [[ -n "${TAG_SLUG:-}" && -n "${CMUX_SOCKET:-}" ]]; then
+  # Ensure tag-specific socket paths win even if the caller has CMUX_* overrides.
+  "${OPEN_CLEAN_ENV[@]}" CMUX_SOCKET_PATH="$CMUX_SOCKET" CMUXD_UNIX_PATH="$CMUXD_SOCKET" open "$APP_PATH"
+else
+  "${OPEN_CLEAN_ENV[@]}" open "$APP_PATH"
+fi
 osascript -e "tell application id \"${BUNDLE_ID}\" to activate" || true
 
 # Safety: ensure only one instance is running.