feat: add status line with agent display + fix pa-mode keybind

Status line shows: [agent-name] Model | X% context
- Added statusline.sh script that reads CLAUDE_AGENT env var
- Configured settings.json to use the status line script

Fixed pa-mode keybind issue (terminal closing immediately):
- Changed from detached session + attach to exec tmux -A
- Using exec replaces shell process, keeping terminal open
- Added CLAUDE_AGENT env var export for status line

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

automation/pa-mode

@@ -11,7 +11,7 @@ usage() {
     echo ""
     echo "Commands:"
     echo "  (none)    Attach to existing session or create new one"
-    echo "  new       Force new session (detaches existing if any)"
+    echo "  new       Force new session (kills existing if any)"
     echo "  kill      Terminate the PA session"
     echo "  status    Show session status"
     echo ""
@@ -21,46 +21,41 @@ get_session_id() {
     date +"%Y-%m-%d_%H-%M-%S"
 }
 
-create_session() {
-    local session_id
-    session_id=$(get_session_id)
-    local history_file="$HISTORY_DIR/${session_id}.jsonl"
-
-    # Record session start in index
+record_session_start() {
+    local session_id="$1"
     local tmp_file
     tmp_file=$(mktemp)
     jq --arg id "$session_id" --arg started "$(date -Iseconds)" \
         '.sessions += [{"id": $id, "started": $started, "ended": null, "summarized": false, "topics": []}]' \
         "$INDEX_FILE" > "$tmp_file" && mv "$tmp_file" "$INDEX_FILE"
-
-    # Create tmux session with claude in PA mode
-    # Using HISTFILE-like approach: set env var for history location
-    tmux new-session -d -s "$SESSION_NAME" -c "$HOME" \
-        "PA_SESSION_ID='$session_id' PA_HISTORY_FILE='$history_file' claude --dangerously-skip-permissions --agent personal-assistant"
-
-    echo "Created new PA session: $session_id"
 }
 
-attach_session() {
-    if tmux has-session -t "$SESSION_NAME" 2>/dev/null; then
-        tmux attach-session -t "$SESSION_NAME"
-    else
-        create_session
-        tmux attach-session -t "$SESSION_NAME"
+create_or_attach_session() {
+    local session_id
+    session_id=$(get_session_id)
+    local history_file="$HISTORY_DIR/${session_id}.jsonl"
+
+    # If session doesn't exist, record it in index before creating
+    if ! tmux has-session -t "$SESSION_NAME" 2>/dev/null; then
+        record_session_start "$session_id"
     fi
+
+    # Export for status line, then exec tmux (replaces this shell process)
+    # Using -A: attach if session exists, create if not
+    export CLAUDE_AGENT=personal-assistant
+    exec tmux new-session -A -s "$SESSION_NAME" -c "$HOME" \
+        "CLAUDE_AGENT=personal-assistant PA_SESSION_ID='$session_id' PA_HISTORY_FILE='$history_file' claude --dangerously-skip-permissions --agent personal-assistant"
 }
 
 case "${1:-}" in
     "")
-        attach_session
+        create_or_attach_session
         ;;
     new)
         if tmux has-session -t "$SESSION_NAME" 2>/dev/null; then
-            echo "Killing existing session..."
             tmux kill-session -t "$SESSION_NAME"
         fi
-        create_session
-        tmux attach-session -t "$SESSION_NAME"
+        create_or_attach_session
         ;;
     kill)
         if tmux has-session -t "$SESSION_NAME" 2>/dev/null; then

automation/statusline.sh

@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+# Claude Code Status Line - displays agent, model, and context usage
+input=$(cat)
+
+AGENT="${CLAUDE_AGENT:-}"
+MODEL=$(echo "$input" | jq -r '.model.display_name // "?"')
+
+# Calculate context percentage
+CONTEXT_PCT="?"
+usage=$(echo "$input" | jq '.context_window.current_usage // empty')
+if [ -n "$usage" ]; then
+  current=$(echo "$usage" | jq '.input_tokens + .cache_creation_input_tokens + .cache_read_input_tokens')
+  size=$(echo "$input" | jq '.context_window.context_window_size')
+  if [ "$size" -gt 0 ] 2>/dev/null; then
+    CONTEXT_PCT=$((current * 100 / size))
+  fi
+fi
+
+if [ -n "$AGENT" ]; then
+  echo "[$AGENT] $MODEL | ${CONTEXT_PCT}% context"
+else
+  echo "$MODEL | ${CONTEXT_PCT}% context"
+fi