Vibe coding and AI agents classes in Canada

# Our park agent: a tool loop with a checked answer (Modern Age Coders, written for this page)
import csv

PARKS = list(csv.DictReader(open("ottawa-parks.csv", encoding="utf-8-sig")))
DOG_CODES = {"off_leash": "0", "on_leash": "1", "mixed": "2", "no_dogs": "3", "not_designated": "4"}

def find_parks(ward, dog_rule):
    """Tool 1: park names in a ward with a given dog rule."""
    code = DOG_CODES[dog_rule]
    return [p["NAME"] for p in PARKS if p["WARD_NAME"] == ward and p["DOG_DESIGNATION"] == code]

def park_details(name):
    """Tool 2: address and the city's own dog wording for one park."""
    for p in PARKS:
        if p["NAME"] == name:
            return {"address": p["ADDRESS"], "dogs": p["DOG_DESIGNATION_DETAILS"]}
    return {"error": "no park called " + name}

TOOLS = {"find_parks": find_parks, "park_details": park_details}

def run(model_steps):
    """The loop: run each tool call the model asks for, keep every result, check the final answer."""
    seen = set()
    for step in model_steps:
        if step["type"] == "tool":
            result = TOOLS[step["name"]](**step["args"])
            names = result if isinstance(result, list) else [step["args"].get("name", "")]
            seen.update(names)
            print("tool", step["name"], "->", len(names) if isinstance(result, list) else result.get("address", result))
        else:
            unsupported = [n for n in step["parks"] if n not in seen]
            print("answer:", step["parks"][:3], "..." if len(step["parks"]) > 3 else "")
            print("check:", "OK" if not unsupported else "REJECTED, no tool result for " + ", ".join(unsupported))

# Stand-in for a model: a fixed plan, so the loop can be tested without any AI service.
found = find_parks("Kanata North", "off_leash")
honest = [{"type": "tool", "name": "find_parks", "args": {"ward": "Kanata North", "dog_rule": "off_leash"}},
          {"type": "tool", "name": "park_details", "args": {"name": found[0]}},
          {"type": "answer", "parks": found}]
invented = honest[:1] + [{"type": "answer", "parks": found[:2] + ["Maple Leaf Dog Run"]}]

run(honest)
run(invented)

tool find_parks -> 11
tool park_details -> 5599 Campeau Drive, Kanata
answer: ['Kanata Town Centre Stormwater Pond', 'Judy Laughton Park', 'Village Green Stormwater Facility'] ...
check: OK
tool find_parks -> 11
answer: ['Kanata Town Centre Stormwater Pond', 'Judy Laughton Park', 'Maple Leaf Dog Run']
check: REJECTED, no tool result for Maple Leaf Dog Run

Kanata North has 95 parks; 11 carry code 0. The honest plan passes the check. The plan that adds a park its tools never returned is rejected.