feat(pid): pid_symbol_list and pid_symbol_insert — blocks with tags, ports and XDATA

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01FKFStjEFzpGyLq5bMpWxTd

docs/tool-inventory.json

@@ -3,10 +3,10 @@
   "schema_version": 1,
   "package_version": "1.5.1",
   "totals": {
-    "tools": 157,
+    "tools": 159,
     "resources": 6,
     "prompts": 5,
-    "groups": 19
+    "groups": 20
   },
   "groups": {
     "analysis": 12,
@@ -21,6 +21,7 @@
     "entity_query": 9,
     "layers": 14,
     "layouts": 12,
+    "pid": 2,
     "premium": 12,
     "solids": 5,
     "system": 7,
@@ -1716,6 +1717,34 @@
         "readOnlyHint": false
       }
     },
+    {
+      "name": "pid_symbol_insert",
+      "group": "pid",
+      "cost": "mutate",
+      "summary": "Place a P&ID symbol (valve, pump, vessel, instrument bubble, connector) as a tagged block with ports.",
+      "tags": [
+        "create",
+        "pid"
+      ],
+      "annotations": {
+        "title": "P&ID: Insert Symbol",
+        "readOnlyHint": false
+      }
+    },
+    {
+      "name": "pid_symbol_list",
+      "group": "pid",
+      "cost": "read",
+      "summary": "List the P&ID symbol catalogue: families, variants, ports, parameters.",
+      "tags": [
+        "pid",
+        "query"
+      ],
+      "annotations": {
+        "title": "P&ID: Symbol Catalogue",
+        "readOnlyHint": true
+      }
+    },
     {
       "name": "point_from_snap",
       "group": "premium",