add context window monitor

Writes the current context window to logs/current_context_window (uses a symlink to a session ID).

This PR was unfortunately generated by a different LLM and did a ton of superficial reformating, it's actually a fairly small and benign change, but I don't want to roll back everything. Hope that's ok.

monitor_context_window.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+
+# Hacky script for viewing context window
+
+if [[ -n "$G3_WORKSPACE" ]]; then
+    TARGET_DIR="$G3_WORKSPACE/logs"
+else
+    TARGET_DIR="$HOME/tmp/workspace/logs"
+fi
+
+if [[ ! -d "$TARGET_DIR" ]]; then
+    echo "Error: Directory '$TARGET_DIR' does not exist."
+    exit 1
+fi
+
+cd "$TARGET_DIR" || exit 1
+
+NAME="$TARGET_DIR/current_context_window"
+
+echo "Monitoring directory '$NAME' for current context window, (waits for first update)"
+
+
+L=$(stat -f %m $NAME); while sleep 0.5; do N=$(stat -f %m $NAME); if [ "$N" != "$L" ]; then clear; cat $NAME; L=$N; fi; done