o: add log command, rename tail to chatstream

- Add 'o log [-n N]' to read last N lines from agent log (default 1000)
- Rename 'o tail' to 'o chatstream' for clarity
- Update TUI to show log history before streaming chat

data/scripts/o

@@ -381,20 +381,45 @@ cmd_prompt() {
     done
 }
 
-cmd_tail() {
+cmd_chatstream() {
     local ctx s a
     ctx=$(resolve_context "$@") || exit 1
     s="${ctx%%|*}"
     a="${ctx##*|}"
     if [[ -z "$s" || -z "$a" ]]; then
         echo "error: session and agent are required" >&2
-        echo "  usage: o tail <session> <agent>" >&2
+        echo "  usage: o chatstream <session> <agent>" >&2
         echo "  or:    export session=<name> agent=<name>" >&2
         exit 1
     fi
     exec ollie-9p read "session/$s/agent/$a/chat"
 }
 
+cmd_log() {
+    local lines=1000
+    local ctx s a
+
+    # Parse -n flag for line count
+    while [[ $# -gt 0 && "$1" == -* ]]; do
+        case "$1" in
+            -n) shift; lines="${1:-1000}"; shift ;;
+            -n*) lines="${1#-n}"; shift ;;
+            *) break ;;
+        esac
+    done
+
+    ctx=$(resolve_context "$@") || exit 1
+    s="${ctx%%|*}"
+    a="${ctx##*|}"
+    if [[ -z "$s" || -z "$a" ]]; then
+        echo "error: session and agent are required" >&2
+        echo "  usage: o log [-n lines] [session] [agent]" >&2
+        echo "  or:    export session=<name> agent=<name>" >&2
+        exit 1
+    fi
+    ollie-9p read "session/$s/agent/$a/log" | tail -n "$lines"
+}
+
 cmd_env() {
     # Accept optional positional args to set context
     if [[ $# -ge 1 ]]; then
@@ -481,10 +506,10 @@ cmd_tui() {
     # └──────────────────────────────────┘
     # State shown in tmux status-right.
 
-    # Pane 0: chat (top, 80%)
+    # Pane 0: chat (top, 80%) - show last 1000 lines of log, then tail chat
     tmux -CC new-session -d -s "$tmux_session" -c "$HOME" \
         -e "session=$s" -e "agent=$a"
-    tmux send-keys -t "$tmux_session" "clear; o tail | grep -v '\\[\\[\\[.*\\]\\]\\]'" Enter
+    tmux send-keys -t "$tmux_session" "o log -n 1000 | grep -v '\\[\\[\\[.*\\]\\]\\]'; o chatstream | grep -v '\\[\\[\\[.*\\]\\]\\]'" Enter
 
     # Pane 1: prompt REPL (bottom, 20% height)
     tmux split-window -t "$tmux_session" -v -l 20% \
@@ -540,7 +565,8 @@ Commands:
   kill                 Kill active session
 
   prompt               Interactive multi-line prompt REPL
-  tail                 Stream chat output
+  chatstream           Stream chat output
+  log [-n N]           Show last N lines of agent log (default 1000)
   tui                  Launch tmux layout
   tui exit             Kill tmux TUI session
 
@@ -584,7 +610,8 @@ case "$subcmd" in
     stop)     cmd_stop "$@" ;;
     kill)     cmd_kill "$@" ;;
     prompt)   cmd_prompt "$@" ;;
-    tail)     cmd_tail "$@" ;;
+    chatstream) cmd_chatstream "$@" ;;
+    log)      cmd_log "$@" ;;
     tui)      cmd_tui "$@" ;;
     env)      cmd_env "$@" ;;
     help|-h|--help) cmd_help ;;