feat(ibmi-mcp-server): add count_total_records tool

Introduce a custom tool that returns total row counts via the Db2 for i
catalog statistic QSYS2.SYSTABLESTAT.NUMBER_ROWS. Supports an optional
table_schema parameter to disambiguate tables sharing a name across
libraries. Register the tool in the custom_tools toolset.

.config/opencode/mcp/ibmi-mcp-server/tools/custom-tools.yaml

@@ -37,7 +37,38 @@ tools:
           TABLE_NAME,
           ORDINAL_POSITION
 
+  count_total_records:
+    source: ibmi-system
+    description: >-
+      Return the total row count for a table by reading the Db2 for i
+      catalog statistic QSYS2.SYSTABLESTAT.NUMBER_ROWS. Optionally
+      provide table_schema to disambiguate tables that share a name
+      across libraries.
+    parameters:
+      - name: table_name
+        type: string
+        description: "The name of the table to count records for."
+        required: true
+      - name: table_schema
+        type: string
+        description: "Schema/library holding the table. Example: 'MYLIB'."
+        required: true
+    statement: |
+      SELECT
+          TABLE_SCHEMA,
+          TABLE_NAME,
+          NUMBER_ROWS AS TOTAL_RECORDS,
+          LAST_USED_TIMESTAMP
+      FROM
+          QSYS2.SYSTABLESTAT
+      WHERE
+          TABLE_NAME = UPPER(:table_name)
+          AND (:table_schema IS NULL OR TABLE_SCHEMA = UPPER(:table_schema))
+      ORDER BY
+          TABLE_SCHEMA
+
 toolsets:
   custom_tools:
     tools:
       - get_column_info
+      - count_total_records

.config/opencode/opencode.jsonc

@@ -98,6 +98,10 @@
       "command": ["npx", "@playwright/mcp@latest"],
       "enabled": true,
     },
+    "chrome-devtools": {
+      "type": "local",
+      "command": ["npx", "-y", "chrome-devtools-mcp@latest"],
+    },
     "ibmi-server": {
       "type": "local",
       "command": [
@@ -134,17 +138,11 @@
     "explore": {
       "model": "zai-coding-plan/glm-4.5-air",
     },
-    "scout": {
-      "model": "zai-coding-plan/glm-4.5-air",
-    },
   },
   "share": "disabled",
   "snapshot": true,
-  // OpenCode Quota: tuiCommandDisplay chooses whether native TUI command output appears in the session transcript or a local popup dialog.
-  // OpenCode Quota: loads the server plugin for slash commands and quota checks.
   "plugin": ["./plugins/ibmi-gate.ts", "@slkiser/opencode-quota@latest"],
   "provider": {
-    // Detected zai authentication; opencode-quota added this global provider declaration.
     "zai": {},
   },
 }