diff --git a/bin/start.sh b/bin/start.sh
new file mode 100755
index 0000000..3558024
--- /dev/null
+++ b/bin/start.sh
@@ -0,0 +1,112 @@
+#!/usr/bin/env bash
+# autoresearch tmux session orchestrator
+# Usage: start.sh [start|stop|status]
+set -euo pipefail
+
+SESSION="autoresearch"
+CONFIG="${HOME}/.claude/autoresearch.yaml"
+LOGDIR="${HOME}/.claude/autoresearch"
+SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
+
+get_projects() {
+    python3 -c "
+import yaml, os, sys
+try:
+    cfg = yaml.safe_load(open('${CONFIG}'))
+    for p in cfg.get('projects', []):
+        print(os.path.expanduser(p['path']))
+except Exception as e:
+    print(f'ERROR: {e}', file=sys.stderr)
+    sys.exit(1)
+"
+}
+
+cmd_start() {
+    if tmux has-session -t "$SESSION" 2>/dev/null; then
+        echo "autoresearch: session '$SESSION' already running"
+        echo "  attach: tmux attach -t $SESSION"
+        return 0
+    fi
+
+    mkdir -p "$LOGDIR"
+
+    # Window 0: overview — left: log viewer, right (30%): metrics
+    tmux new-session -d -s "$SESSION" -n "overview" -x 220 -y 50
+    tmux split-window -h -t "${SESSION}:overview" -p 30
+    tmux send-keys -t "${SESSION}:overview.left" \
+        "watch -n5 python3 '${SCRIPT_DIR}/log_view.py'" Enter
+    tmux send-keys -t "${SESSION}:overview.right" \
+        "watch -n10 python3 '${SCRIPT_DIR}/metrics.py'" Enter
+
+    # One window per project
+    local win=1
+    while IFS= read -r project_path; do
+        local project_name
+        project_name=$(basename "$project_path")
+        tmux new-window -t "${SESSION}:${win}" -n "$project_name"
+        # Start claude in the project directory
+        tmux send-keys -t "${SESSION}:${win}" \
+            "cd '${project_path}' && claude --name 'autoresearch-${project_name}'" Enter
+        # Wait for claude to initialize, then invoke the loop skill
+        sleep 3
+        tmux send-keys -t "${SESSION}:${win}" \
+            "/ralph-loop Run one autoresearch experiment iteration per the autoresearch-loop skill. --completion-promise STOP" Enter
+        win=$((win + 1))
+    done < <(get_projects)
+
+    tmux select-window -t "${SESSION}:0"
+    local project_count=$(( win - 1 ))
+    echo "autoresearch: started — ${project_count} project window(s)"
+    echo "  attach: tmux attach -t $SESSION"
+}
+
+cmd_stop() {
+    if ! tmux has-session -t "$SESSION" 2>/dev/null; then
+        echo "autoresearch: not running"
+        return 0
+    fi
+    tmux kill-session -t "$SESSION"
+    echo "autoresearch: stopped"
+}
+
+cmd_status() {
+    if ! tmux has-session -t "$SESSION" 2>/dev/null; then
+        echo "autoresearch: not running"
+        return 1
+    fi
+    echo "autoresearch: running"
+    tmux list-windows -t "$SESSION"
+    echo ""
+    echo "Last experiment per project:"
+    python3 - <<'PYEOF'
+import json, os
+from collections import OrderedDict
+
+log = os.path.expanduser('~/.claude/autoresearch/log.jsonl')
+if not os.path.exists(log):
+    print("  (no experiments yet)")
+else:
+    latest = OrderedDict()
+    with open(log) as f:
+        for line in f:
+            try:
+                e = json.loads(line)
+                latest[e.get('project')] = e
+            except Exception:
+                pass
+    for proj, e in latest.items():
+        kept = '✓' if e.get('kept') else '✗'
+        desc = (e.get('description') or '')[:50]
+        print(f"  {proj}: exp {e.get('exp', '?')} {kept} — {desc}")
+PYEOF
+}
+
+case "${1:-start}" in
+    start)  cmd_start ;;
+    stop)   cmd_stop ;;
+    status) cmd_status ;;
+    *)
+        echo "Usage: $(basename "$0") [start|stop|status]"
+        exit 1
+        ;;
+esac