Model Context Protocol (MCP) support with new use case (#42)

* initial mcp

* food ordering with mcp

* prompt eng

* splitting out goals and updating docs

* a diff so I can get tests from codex

* a diff so I can get tests from codex

* oops, missing files

* tests, file formatting

* readme and setup updates

* setup.md link fixes

* readme change

* readme change

* readme change

* stripe food setup script

* single agent mode default

* prompt engineering for better multi agent performance

* performance should be greatly improved

* Update goals/finance.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* Update activities/tool_activities.py

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

* co-pilot PR suggested this change, and now fixed it

* stronger wording around json format response

* formatting

* moved docs to dir

* moved image assets under docs

* cleanup env example, stripe guidance

* cleanup

---------

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>

tools/food/add_to_cart.py

@@ -0,0 +1,33 @@
+def add_to_cart(args: dict) -> dict:
+    """
+    Simple stateless cart tool for demo purposes.
+    In production, this would use proper session storage or database.
+    """
+    customer_email = args.get("customer_email")
+    item_name = args.get("item_name")
+    item_price = float(args.get("item_price", 0))
+    quantity = int(args.get("quantity", 1))
+    stripe_product_id = args.get("stripe_product_id")
+
+    # Basic validation
+    if not customer_email:
+        return {"error": "Customer email is required"}
+    if not item_name:
+        return {"error": "Item name is required"}
+    if item_price <= 0:
+        return {"error": "Item price must be greater than 0"}
+    if quantity <= 0:
+        return {"error": "Quantity must be greater than 0"}
+
+    # For demo purposes, just acknowledge the addition
+    # In a real system, this would store to session/database
+    return {
+        "status": "success",
+        "message": f"Added {quantity} x {item_name} (${item_price}) to cart for {customer_email}",
+        "item_added": {
+            "name": item_name,
+            "price": item_price,
+            "quantity": quantity,
+            "stripe_product_id": stripe_product_id,
+        },
+    }