[2ff88f42] Update GEMINI.md with Notion Tooling Documentation

GEMINI.md

@@ -122,6 +122,29 @@ To ensure the stability and accuracy of the metric extraction logic, a dedicated
 
 These tests are crucial for preventing regressions as the parser logic evolves.
 
+## Notion Maintenance & Data Sync
+
+Since the "Golden Record" for Industry Verticals (Pains, Gains, Products) resides in Notion, specific tools are available to read and sync this data.
+
+**Location:** `/app/company-explorer/backend/scripts/notion_maintenance/`
+
+**Prerequisites:**
+- Ensure `.env` is loaded with `NOTION_API_KEY` and correct DB IDs.
+
+**Key Scripts:**
+
+1.  **`check_relations.py` (Reader - Deep):**
+    -   **Purpose:** Reads Verticals and resolves linked Product Categories (Relation IDs -> Names). Essential for verifying the "Primary/Secondary Product" logic.
+    -   **Usage:** `python3 check_relations.py`
+
+2.  **`update_notion_full.py` (Writer - Batch):**
+    -   **Purpose:** Batch updates Pains and Gains for multiple verticals. Use this as a template when refining the messaging strategy.
+    -   **Usage:** Edit the dictionary in the script, then run `python3 update_notion_full.py`.
+
+3.  **`list_notion_structure.py` (Schema Discovery):**
+    -   **Purpose:** Lists all property keys and page titles. Use this to debug schema changes (e.g. if a column was renamed).
+    -   **Usage:** `python3 list_notion_structure.py`
+
 ## Next Steps
 *   **Marketing Automation:** Implement the actual sending logic (or export) based on the contact status.
 *   **Job Role Mapping Engine:** Connect the configured patterns to the contact import/creation process to auto-assign roles.