derstandard: auto-track seen articles

- items now shows only NEW (unseen) articles by default
- items --all shows everything including seen
- articles command auto-marks URLs as seen
- Added seen/reset commands for state management
- State stored in memory/derstandard-seen.txt

bin/derstandard

@@ -4,19 +4,27 @@ set -e
 
 FIVEFILTERS_URL="https://fivefilters.cloonar.com"
 RSS_SOURCE="https://www.derstandard.at/rss"
+SEEN_FILE="${DERSTANDARD_SEEN_FILE:-$HOME/clawd/memory/derstandard-seen.txt}"
 
 CURL="curl -sk"
 
+# Ensure seen file exists
+mkdir -p "$(dirname "$SEEN_FILE")"
+touch "$SEEN_FILE"
+
 usage() {
   cat <<EOF
 Usage: derstandard <command> [args]
 
 Commands:
-  items [max]              Title + URL pairs for selection (default: 50)
+  items [max]              NEW items only (unseen), title + URL pairs
+  items --all [max]        All items including seen
   article <url>            Fetch single article content
-  articles <url1,url2,...> Fetch multiple articles (comma-separated)
-  urls [max]               Article URLs only
-  titles [max]             Article titles only
+  articles <url1,url2,...> Fetch multiple articles + mark as seen
+  urls [max]               Article URLs only (all)
+  titles [max]             Article titles only (all)
+  seen                     Show seen count and recent entries
+  reset                    Clear seen history
   raw [max]                Full RSS XML
 EOF
 }
@@ -41,12 +49,41 @@ decode_entities() {
   sed 's/&amp;amp;/\&/g; s/&amp;/\&/g; s/&lt;/</g; s/&gt;/>/g; s/&quot;/"/g; s/&#39;/'"'"'/g'
 }
 
+mark_seen() {
+  local url="$1"
+  # Only add if not already present
+  if ! grep -qF "$url" "$SEEN_FILE" 2>/dev/null; then
+    echo "$url" >> "$SEEN_FILE"
+  fi
+}
+
+is_seen() {
+  grep -qF "$1" "$SEEN_FILE" 2>/dev/null
+}
+
 case "${1:-}" in
   items)
-    feed=$(fetch_feed "${2:-50}")
-    titles=$(echo "$feed" | grep -oP '<title>\K[^<]+' | tail -n +2 | decode_entities)
-    urls=$(echo "$feed" | grep -oP '<link>\K[^<]+' | grep "derstandard.at/story")
-    paste <(echo "$titles") <(echo "$urls") 2>/dev/null | head -"${2:-50}"
+    show_all=false
+    max=50
+    shift || true
+    if [ "${1:-}" = "--all" ]; then
+      show_all=true
+      shift || true
+    fi
+    [ -n "${1:-}" ] && max="$1"
+    
+    feed=$(fetch_feed "$max")
+    
+    # Build items list
+    while IFS=$'\t' read -r title url; do
+      if $show_all || ! is_seen "$url"; then
+        printf '%s\t%s\n' "$title" "$url"
+      fi
+    done < <(
+      titles=$(echo "$feed" | grep -oP '<title>\K[^<]+' | tail -n +2 | decode_entities)
+      urls=$(echo "$feed" | grep -oP '<link>\K[^<]+' | grep "derstandard.at/story")
+      paste <(echo "$titles") <(echo "$urls") 2>/dev/null | head -"$max"
+    )
     ;;
   article)
     [ -z "${2:-}" ] && { echo "Usage: derstandard article <url>"; exit 1; }
@@ -62,6 +99,8 @@ case "${1:-}" in
       fetch_single_article "$url"
       echo ""
       echo ""
+      # Mark as seen
+      mark_seen "$url"
     done
     ;;
   urls)
@@ -70,6 +109,18 @@ case "${1:-}" in
   titles)
     fetch_feed "${2:-50}" | grep -oP '<title>\K[^<]+' | tail -n +2 | decode_entities
     ;;
+  seen)
+    count=$(wc -l < "$SEEN_FILE" 2>/dev/null | tr -d ' ')
+    echo "Seen: $count URLs"
+    if [ "$count" -gt 0 ]; then
+      echo "Recent:"
+      tail -5 "$SEEN_FILE"
+    fi
+    ;;
+  reset)
+    > "$SEEN_FILE"
+    echo "Cleared seen history"
+    ;;
   raw)
     fetch_feed "${2:-50}"
     ;;