diff --git a/data/scripts/o b/data/scripts/o
index 8ef0792..b20cce7 100755
--- a/data/scripts/o
+++ b/data/scripts/o
@@ -167,7 +167,8 @@ cmd_prompt() {
     s=$(require_session)
     a=$(require_agent "$s")
     echo "[$s/$a]"
-    echo "Enter prompts (blank line sends, Ctrl+D exits):"
+    echo "Enter prompts (blank line sends, Ctrl+D exits)."
+    echo "Slash commands: /stop /compact /kill /clear /model /backend /cwd /help"
     echo ""
 
     local buf=""
@@ -185,6 +186,30 @@ cmd_prompt() {
             printf "\n"
             break
         fi
+        # Slash commands (only when buffer is empty — first line)
+        if [[ -z "$buf" && "$line" == /* ]]; then
+            local cmd="${line#/}"
+            case "$cmd" in
+                stop)    echo "stop" | ollie-9p write "$path/ctl"; echo "[stopped]" ;;
+                compact) echo "compact" | ollie-9p write "$path/ctl"; echo "[compacted]" ;;
+                kill)    echo "kill" | ollie-9p write "session/$s/ctl"; echo "[session killed]"; break ;;
+                clear)   echo "clear" | ollie-9p write "$path/ctl"; echo "[cleared]" ;;
+                model*)  echo "$cmd" | ollie-9p write "$path/ctl"; echo "[${cmd}]" ;;
+                backend*) echo "$cmd" | ollie-9p write "$path/ctl"; echo "[${cmd}]" ;;
+                cwd*)    echo "$cmd" | ollie-9p write "$path/ctl"; echo "[${cmd}]" ;;
+                help)
+                    echo "  /stop      — interrupt running agent"
+                    echo "  /compact   — compact context"
+                    echo "  /kill      — kill the session"
+                    echo "  /clear     — clear history"
+                    echo "  /model X   — switch model"
+                    echo "  /backend X — switch backend"
+                    echo "  /cwd X     — change working directory"
+                    ;;
+                *)  echo "unknown command: /$cmd (try /help)" ;;
+            esac
+            continue
+        fi
         if [[ -z "$line" && -n "$buf" ]]; then
             # Blank line sends accumulated buffer
             printf '%s\n' "$buf" | ollie-9p write "$path/prompt"
@@ -225,6 +250,12 @@ cmd_stop() {
     echo "stop" | ollie-9p write "$path/ctl"
 }
 
+cmd_kill() {
+    local s
+    s=$(require_session)
+    echo "kill" | ollie-9p write "session/$s/ctl"
+}
+
 cmd_tui() {
     local s a
     s=$(require_session)
@@ -270,7 +301,8 @@ commands:
   read <file>       Read a file from the active agent's namespace
   ls [path]         List namespace entries (defaults to agent dir)
   ctl <cmd>         Send control command (stop, compact, kill, ...)
-  stop              Interrupt the running agent (shorthand for 'o ctl stop')
+  stop              Interrupt the running agent
+  kill              Kill the active session
   prompt            Interactive multi-line prompt REPL
   tail              Stream chat output
   tui               Launch tmux layout (chat + prompt + state + shell)
@@ -299,6 +331,7 @@ case "$subcmd" in
     ls)     cmd_ls "$@" ;;
     ctl)    cmd_ctl "$@" ;;
     stop)   cmd_stop "$@" ;;
+    kill)   cmd_kill "$@" ;;
     prompt) cmd_prompt "$@" ;;
     tail)   cmd_tail "$@" ;;
     tui)    cmd_tui "$@" ;;