auto-detect plan, complexity scoring, ctx7 cache, graphify in workflows

- detect_plan() auto-detects Max/Pro/Free from ~/.claude.json
- session-start budget adapts to plan (Max=20k, Pro=11k, Free=5k)
- token counting now uses only ACTIVE plugins, not installed binaries
- statusline shows plan label + session duration instead of start time
- plugin-advisor: complexity assessment (0-100%) drives tool selection
- plugin-advisor: auto-activation with confirmation (PHASE 4)
- ruflo OFF by default, GSD v2 preferred for multi-session
- init-project: ctx7 pre-fetch + graphify scaffold + graphify full
- ship-feature: ctx7 cache check before implementation
- frontend-design disabled in installer (doublon with ui-ux-pro-max)
- python3 -c moved from deny to ask (unblocks graphify)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

lib/detect-plugins.sh

@@ -72,3 +72,33 @@ detect_graphifyy() {
   # Graphifyy — codebase knowledge graph, installed via pipx
   command -v graphify &>/dev/null
 }
+
+
+# --- Plan detection ---
+
+detect_plan() {
+  # Detect Claude plan: max, pro, or free.
+  # Checks ~/.claude.json for model access hints.
+  # Returns plan name on stdout, always exits 0.
+  local claude_json="$HOME/.claude.json"
+  if [ -f "$claude_json" ]; then
+    # Max plan: has opus model access or max flag
+    if grep -q '"planType".*"max"' "$claude_json" 2>/dev/null; then
+      echo "max"; return 0
+    fi
+    # Check cached features for max indicators
+    if grep -q '"tengu_cobalt_compass": true' "$claude_json" 2>/dev/null \
+       && grep -q '"tengu_harbor": true' "$claude_json" 2>/dev/null; then
+      echo "max"; return 0
+    fi
+  fi
+  # Fallback: check if claude CLI reports plan
+  local plan
+  plan=$(claude config get planType 2>/dev/null || true)
+  case "$plan" in
+    max|Max|MAX) echo "max" ;;
+    pro|Pro|PRO) echo "pro" ;;
+    free|Free|FREE) echo "free" ;;
+    *) echo "pro" ;;  # default assumption
+  esac
+}