memory: add staleness indicator to recall, remove body length limit

prompts/tools-memory.md

@@ -20,7 +20,7 @@ call_tool: calls=[{tool: "memory_remember", args: ["<title>", "<tags_csv>", "<bo
 - One memory per distinct fact.
 - Before writing, recall on the same topic to avoid duplicates. If a closely related memory exists, update it rather than creating a new one.
 - Do not store stale facts. If you learn that a previously stored fact is wrong or outdated, update or replace it.
-- Keep bodies concise — a memory should be a fact, not a narrative. If you find yourself writing more than 3-4 sentences, split it into multiple focused memories.
+- There is no length limit on memory bodies. Store as much detail as needed for the fact to be useful in a future session.
 - **Act autonomously.** Do not ask the user whether to remember something — if the trigger condition is met, remember it.
 
 ---

tools/memory_recall

@@ -31,6 +31,7 @@ fi
 
 max_files=10
 max_lines_per_file=50
+stale_days=14
 count=0
 
 while IFS= read -r file; do
@@ -39,7 +40,15 @@ while IFS= read -r file; do
         echo "(showing $max_files of $(echo "$matches" | wc -l) matched files)"
         break
     fi
-    echo "=== $(basename "$file") ==="
+    mtime=$(stat -c %Y "$file" 2>/dev/null)
+    now=$(date +%s)
+    age_days=$(( (now - mtime) / 86400 ))
+    if [ $age_days -ge $stale_days ]; then
+        status="STALE (${age_days}d — verify or forget)"
+    else
+        status="fresh"
+    fi
+    echo "=== $(basename "$file") [$status] ==="
     head -n $max_lines_per_file "$file" || echo "error: could not read $file"
     lines=$(wc -l < "$file" 2>/dev/null)
     if [ "$lines" -gt $max_lines_per_file ] 2>/dev/null; then