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4579fd7
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1 Parent(s): cbaf37a

security: log only exception type (never secrets); generic client errors

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  1. app.py +314 -314
app.py CHANGED
@@ -1,314 +1,314 @@
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- #!/usr/bin/env python
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- """Tool-Using Agent — ask a question and watch the AI call real, live tools to answer it:
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- a calculator, the current date/time, live weather, and Wikipedia. It runs the ReAct loop
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- (decide → call tool → read result → repeat) and shows every tool call it made.
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-
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- All tools are keyless (Open-Meteo + MediaWiki), so the only secret is ANTHROPIC_API_KEY.
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-
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- pip install flask requests anthropic
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- python app.py # http://127.0.0.1:7860
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-
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- Project #9 of the "30 Projects in 15 Days" challenge — GritAI.
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- UI: GritAI engineered/industrial design system (dark, grit-orange, IBM Plex + Archivo).
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- """
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- import os, ast, json, math, operator, datetime, urllib.parse
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- from flask import Flask, request, jsonify, Response
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- import requests
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-
18
- PORT = int(os.environ.get("PORT", "7860"))
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- ANTHROPIC_KEY = os.environ.get("ANTHROPIC_API_KEY")
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- ANTHROPIC_MODEL = os.environ.get("ANTHROPIC_MODEL", "claude-haiku-4-5")
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- MAX_STEPS = 6
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- UA = {"User-Agent": "GritAI-ToolAgent/1.0 (https://gritai.solutions)"}
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-
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- # --------------------------------------------------------------------------- tools
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- _OPS = {ast.Add: operator.add, ast.Sub: operator.sub, ast.Mult: operator.mul,
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- ast.Div: operator.truediv, ast.Pow: operator.pow, ast.Mod: operator.mod,
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- ast.FloorDiv: operator.floordiv, ast.USub: operator.neg, ast.UAdd: operator.pos}
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- _FUNCS = {"sqrt": math.sqrt, "abs": abs, "round": round, "log": math.log, "log10": math.log10,
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- "sin": math.sin, "cos": math.cos, "tan": math.tan, "pi": math.pi, "e": math.e,
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- "floor": math.floor, "ceil": math.ceil, "exp": math.exp, "min": min, "max": max}
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-
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-
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- def _safe_eval(node):
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- if isinstance(node, ast.Constant):
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- if isinstance(node.value, (int, float)):
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- return node.value
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- raise ValueError("only numbers")
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- if isinstance(node, ast.BinOp):
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- return _OPS[type(node.op)](_safe_eval(node.left), _safe_eval(node.right))
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- if isinstance(node, ast.UnaryOp):
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- return _OPS[type(node.op)](_safe_eval(node.operand))
42
- if isinstance(node, ast.Name):
43
- if node.id in _FUNCS:
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- return _FUNCS[node.id]
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- raise ValueError(f"unknown name {node.id}")
46
- if isinstance(node, ast.Call):
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- fn = _FUNCS.get(getattr(node.func, "id", ""))
48
- if not callable(fn):
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- raise ValueError("unknown function")
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- return fn(*[_safe_eval(a) for a in node.args])
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- raise ValueError("unsupported expression")
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-
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-
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- def tool_calculator(expression):
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- try:
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- val = _safe_eval(ast.parse(str(expression), mode="eval").body)
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- return f"{expression} = {val}"
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- except Exception as e:
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- return f"Could not evaluate '{expression}': {e}"
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-
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-
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- def tool_datetime(timezone="UTC"):
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- now = datetime.datetime.now(datetime.timezone.utc)
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- return f"Current UTC date/time: {now.strftime('%A, %d %B %Y, %H:%M UTC')}"
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-
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-
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- _WMO = {0: "clear sky", 1: "mainly clear", 2: "partly cloudy", 3: "overcast", 45: "fog", 48: "rime fog",
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- 51: "light drizzle", 53: "drizzle", 55: "dense drizzle", 61: "light rain", 63: "rain",
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- 65: "heavy rain", 71: "light snow", 73: "snow", 75: "heavy snow", 80: "rain showers",
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- 81: "rain showers", 82: "violent rain showers", 95: "thunderstorm", 96: "thunderstorm w/ hail"}
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-
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-
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- def tool_weather(location):
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- try:
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- g = requests.get("https://geocoding-api.open-meteo.com/v1/search",
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- params={"name": location, "count": 1}, headers=UA, timeout=15).json()
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- if not g.get("results"):
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- return f"No location found for '{location}'."
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- r = g["results"][0]
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- lat, lon = r["latitude"], r["longitude"]
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- place = ", ".join(filter(None, [r.get("name"), r.get("admin1"), r.get("country")]))
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- w = requests.get("https://api.open-meteo.com/v1/forecast",
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- params={"latitude": lat, "longitude": lon,
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- "current": "temperature_2m,relative_humidity_2m,weather_code,wind_speed_10m"},
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- headers=UA, timeout=15).json()
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- c = w.get("current", {})
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- desc = _WMO.get(c.get("weather_code"), "unknown")
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- return (f"Weather in {place}: {c.get('temperature_2m')}°C, {desc}, "
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- f"humidity {c.get('relative_humidity_2m')}%, wind {c.get('wind_speed_10m')} km/h.")
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- except Exception as e:
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- return f"Weather lookup failed: {e}"
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-
93
-
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- def tool_wikipedia(query):
95
- try:
96
- s = requests.get("https://en.wikipedia.org/w/api.php", headers=UA, timeout=15,
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- params={"action": "query", "list": "search", "srsearch": query,
98
- "format": "json", "srlimit": 1}).json()
99
- hits = s.get("query", {}).get("search", [])
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- if not hits:
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- return f"No Wikipedia article found for '{query}'."
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- title = hits[0]["title"]
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- e = requests.get("https://en.wikipedia.org/w/api.php", headers=UA, timeout=15,
104
- params={"action": "query", "prop": "extracts", "exintro": 1, "explaintext": 1,
105
- "titles": title, "format": "json"}).json()
106
- pages = e.get("query", {}).get("pages", {})
107
- extract = next(iter(pages.values()), {}).get("extract", "")
108
- return f"Wikipedia — {title}: {extract[:800]}" if extract else f"Found '{title}' but no summary."
109
- except Exception as e:
110
- return f"Wikipedia lookup failed: {e}"
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-
112
-
113
- TOOLS_SPEC = [
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- {"name": "calculator", "description": "Evaluate an arithmetic expression. Supports + - * / ** % and "
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- "sqrt, log, sin, cos, tan, floor, ceil, abs, round, pi, e.",
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- "input_schema": {"type": "object", "properties": {"expression": {"type": "string"}},
117
- "required": ["expression"]}},
118
- {"name": "current_datetime", "description": "Get the current date and time (UTC).",
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- "input_schema": {"type": "object", "properties": {"timezone": {"type": "string"}}}},
120
- {"name": "weather", "description": "Get the current weather for a city/place name (live).",
121
- "input_schema": {"type": "object", "properties": {"location": {"type": "string"}},
122
- "required": ["location"]}},
123
- {"name": "wikipedia", "description": "Look up a topic on Wikipedia and get a summary (live).",
124
- "input_schema": {"type": "object", "properties": {"query": {"type": "string"}},
125
- "required": ["query"]}},
126
- ]
127
- EXECUTORS = {"calculator": tool_calculator, "current_datetime": tool_datetime,
128
- "weather": tool_weather, "wikipedia": tool_wikipedia}
129
-
130
-
131
- def run_agent(question):
132
- import anthropic
133
- client = anthropic.Anthropic(api_key=ANTHROPIC_KEY)
134
- sysp = ("You are a helpful assistant that answers using the provided tools whenever they help. "
135
- "Call tools to get live/precise data instead of guessing. You may call multiple tools. "
136
- "When you have enough, give a clear, concise final answer.")
137
- msgs = [{"role": "user", "content": question}]
138
- trace = []
139
- for _ in range(MAX_STEPS):
140
- r = client.messages.create(model=ANTHROPIC_MODEL, max_tokens=1024, system=sysp,
141
- tools=TOOLS_SPEC, messages=msgs)
142
- if r.stop_reason == "tool_use":
143
- msgs.append({"role": "assistant", "content": r.content})
144
- results = []
145
- for b in r.content:
146
- if b.type == "tool_use":
147
- out = EXECUTORS.get(b.name, lambda **k: "unknown tool")(**b.input)
148
- trace.append({"tool": b.name, "input": b.input, "result": out[:400]})
149
- results.append({"type": "tool_result", "tool_use_id": b.id, "content": out})
150
- msgs.append({"role": "user", "content": results})
151
- else:
152
- text = "".join(b.text for b in r.content if b.type == "text")
153
- return text.strip(), trace
154
- return "I reached the step limit before finishing — try a simpler question.", trace
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-
156
-
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- app = Flask(__name__)
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- app.config["MAX_CONTENT_LENGTH"] = 512 * 1024
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-
160
-
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- @app.route("/")
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- def home():
163
- return Response(PAGE, mimetype="text/html")
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-
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-
166
- @app.route("/api/ask", methods=["POST"])
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- def api_ask():
168
- q = (request.get_json(force=True).get("question") or "").strip()[:1000]
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- if not q:
170
- return jsonify(error="Ask a question."), 400
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- if not ANTHROPIC_KEY:
172
- return jsonify(error="Set ANTHROPIC_API_KEY on the server to run the agent."), 200
173
- try:
174
- answer, trace = run_agent(q)
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- except Exception as e:
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- import sys; print("agent error:", repr(e), file=sys.stderr, flush=True)
177
- return jsonify(error="The agent hit an error — please try again."), 200
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- return jsonify(answer=answer, trace=trace)
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-
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-
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- # ===================== GritAI engineered/industrial design system =====================
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- PAGE = """<!doctype html><html lang="en"><head><meta charset="utf-8">
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- <title>GritAI · Tool-Using Agent</title>
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- <meta name="viewport" content="width=device-width,initial-scale=1">
185
- <link rel="preconnect" href="https://fonts.googleapis.com">
186
- <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
187
- <link href="https://fonts.googleapis.com/css2?family=Archivo:wght@600;700;800;900&family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@400;500;600&display=swap" rel="stylesheet">
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- <style>
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- :root{--bg:#0a0b0e;--bg2:#0e1015;--panel:#111318;--ink:#eef0f4;--dim:#9aa1b0;--dim2:#5f6675;--line:#20242e;--line2:#2b303c;
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- --grit:#ff5a2a;--grit2:#ff7d54;--grit-dim:#c9451f;
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- --disp:'Archivo',system-ui,sans-serif;--body:'IBM Plex Sans',system-ui,sans-serif;--mono:'IBM Plex Mono',ui-monospace,monospace}
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- *{box-sizing:border-box}html,body{height:100%}
193
- body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;position:relative;overflow-x:hidden}
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- body::before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
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- background:linear-gradient(0deg,transparent 95%,rgba(255,90,42,.04) 100%),
196
- repeating-linear-gradient(90deg,transparent 0 63px,rgba(255,255,255,.018) 63px 64px),
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- repeating-linear-gradient(0deg,transparent 0 63px,rgba(255,255,255,.018) 63px 64px),
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- radial-gradient(120% 80% at 50% -10%,#141821 0%,var(--bg) 55%)}
199
- body::after{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.05;mix-blend-mode:overlay;
200
- background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
201
- .wrap{position:relative;z-index:1;max-width:960px;margin:0 auto;padding:0 28px 70px}
202
- header{display:flex;align-items:center;gap:16px;padding:22px 0 18px;border-bottom:1px solid var(--line);animation:fade .6s .02s both}
203
- .mark{width:38px;height:38px;flex:none}.mark svg{display:block}
204
- .brand{display:flex;flex-direction:column;line-height:1}
205
- .brand .co{font-family:var(--disp);font-weight:900;font-size:19px;letter-spacing:.5px}.brand .co b{color:var(--grit)}
206
- .brand .sub{font-family:var(--mono);font-size:10.5px;letter-spacing:.28em;text-transform:uppercase;color:var(--dim2);margin-top:5px}
207
- .tags{margin-left:auto;display:flex;gap:8px}
208
- .tag{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);border:1px solid var(--line2);border-radius:2px;padding:5px 9px}
209
- .tag.hot{color:var(--grit);border-color:var(--grit-dim)}
210
- .hero{padding:34px 0 26px;animation:fade .6s .12s both}
211
- .hero h1{font-family:var(--disp);font-weight:800;font-size:clamp(30px,5.4vw,52px);line-height:1.02;letter-spacing:-.02em;margin:0;max-width:16ch}
212
- .hero h1 em{font-style:normal;color:var(--grit)}
213
- .hero p{color:var(--dim);max-width:56ch;margin:16px 0 0;font-size:15.5px}
214
- .sec{display:flex;align-items:center;gap:14px;margin:30px 0 14px}
215
- .sec .num{font-family:var(--mono);font-size:11px;font-weight:600;color:var(--grit);letter-spacing:.1em}
216
- .sec .name{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.26em;text-transform:uppercase;color:var(--dim)}
217
- .sec .rule{flex:1;height:1px;background:linear-gradient(90deg,var(--line2),transparent)}
218
- .ask{animation:fade .6s .2s both}
219
- .field{display:flex;align-items:stretch;border:1px solid var(--line2);border-radius:3px;background:var(--panel);overflow:hidden;transition:border-color .18s}
220
- .field:focus-within{border-color:var(--grit-dim)}
221
- .field .car{font-family:var(--mono);color:var(--grit);padding:16px 0 16px 16px;font-size:15px;user-select:none}
222
- .field input{flex:1;background:transparent;border:0;outline:none;color:var(--ink);font-family:var(--body);font-size:15.5px;padding:16px 14px}
223
- .field input::placeholder{color:var(--dim2)}
224
- .run{border:0;background:var(--grit);color:#140a06;font-family:var(--mono);font-weight:600;font-size:13px;letter-spacing:.14em;text-transform:uppercase;padding:0 24px;cursor:pointer;transition:.16s;box-shadow:-1px 0 0 var(--grit-dim)}
225
- .run:hover{background:var(--grit2);box-shadow:0 0 26px -4px rgba(255,90,42,.55)}
226
- .run:disabled{opacity:.55;cursor:default;box-shadow:none}
227
- .ex{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
228
- .chip{font-family:var(--mono);font-size:12px;color:var(--dim);background:var(--panel);border:1px solid var(--line);border-radius:2px;padding:8px 11px;cursor:pointer;transition:.15s}
229
- .chip:hover{color:var(--grit);border-color:var(--grit-dim)}
230
- .chip .pt{color:var(--dim2);margin-right:7px}
231
- .out{display:none}.out.show{display:block}
232
- .trace{border:1px solid var(--line);border-radius:3px;background:linear-gradient(180deg,var(--panel),var(--bg2))}
233
- .log{font-family:var(--mono);font-size:13px;line-height:1.75}
234
- .row{display:grid;grid-template-columns:22px 100px 1fr;gap:0 12px;padding:13px 18px;border-bottom:1px solid var(--line);animation:slidein .45s both}
235
- .row:last-child{border-bottom:0}
236
- .row .mk{color:var(--grit);font-weight:600}
237
- .row .tn{color:var(--grit2);text-transform:uppercase;letter-spacing:.06em;font-weight:500}
238
- .row .rd{color:var(--ink);word-break:break-word}.row .rd .arg{color:var(--dim2)}
239
- .row.none .rd{color:var(--dim)}
240
- .ans{border:1px solid var(--line2);border-left:2px solid var(--grit);border-radius:3px;background:var(--panel);padding:22px 24px}
241
- .ans p{margin:0 0 12px;font-size:16px;line-height:1.65}.ans p:last-child{margin-bottom:0}
242
- .spin{display:inline-flex;gap:6px;padding:16px 18px}.spin span{width:8px;height:8px;border-radius:50%;background:var(--grit);opacity:.5;animation:bd 1.2s infinite}
243
- .spin span:nth-child(2){animation-delay:.18s}.spin span:nth-child(3){animation-delay:.36s}
244
- footer{margin-top:34px;padding-top:16px;border-top:1px solid var(--line);font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--dim2);display:flex;gap:16px;flex-wrap:wrap;animation:fade .6s .5s both}
245
- footer .b{color:var(--dim)}footer .sp{margin-left:auto}
246
- footer a{color:var(--dim);text-decoration:none}footer a:hover{color:var(--grit)}
247
- @keyframes fade{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
248
- @keyframes slidein{from{opacity:0;transform:translateX(-8px)}to{opacity:1;transform:none}}
249
- @keyframes bd{0%,60%,100%{transform:translateY(0);opacity:.35}30%{transform:translateY(-6px);opacity:1}}
250
- </style></head>
251
- <body><div class="wrap">
252
- <header>
253
- <div class="mark"><svg width="38" height="38" viewBox="0 0 38 38" fill="none">
254
- <rect x="1" y="1" width="36" height="36" rx="2" stroke="#2b303c"/>
255
- <path d="M27 12.5A9 9 0 1 0 28 22H19" stroke="#ff5a2a" stroke-width="2.4" stroke-linecap="square"/>
256
- <rect x="10.5" y="10.5" width="3" height="3" fill="#ff5a2a"/>
257
- </svg></div>
258
- <div class="brand"><div class="co">GRIT<b>AI</b></div><div class="sub">Tool-Using Agent</div></div>
259
- <div class="tags"><span class="tag hot">▸ Live</span><span class="tag">SDVOSB</span><span class="tag">Lawton OK</span></div>
260
- </header>
261
- <section class="hero">
262
- <h1>Ask it anything. It <em>calls real tools</em> to answer.</h1>
263
- <p>A calculator, a clock, live weather, and Wikipedia — the agent decides what to call, runs it, and shows its work. Not a chatbot guessing. An operator.</p>
264
- </section>
265
- <div class="sec"><span class="num">01</span><span class="name">Ask</span><span class="rule"></span></div>
266
- <div class="ask">
267
- <div class="field">
268
- <span class="car">&gt;_</span>
269
- <input id="q" placeholder="What's a 15% tip on $47.80, and the current weather in Paris?" autofocus>
270
- <button class="run" id="go" onclick="ask()">Run ▸</button>
271
- </div>
272
- <div class="ex" id="ex"></div>
273
- </div>
274
- <div class="out" id="out">
275
- <div class="sec"><span class="num">02</span><span class="name">Trace — live tool calls</span><span class="rule"></span></div>
276
- <div class="trace"><div class="log" id="trace"></div></div>
277
- <div class="sec"><span class="num">03</span><span class="name">Answer</span><span class="rule"></span></div>
278
- <div class="ans" id="answer"></div>
279
- </div>
280
- <footer>
281
- <span class="b">ReAct loop</span><span>·</span><span>keyless tools — Open-Meteo + Wikipedia</span>
282
- <span class="sp"><a href="https://gritai.solutions">GRITAI SOLUTIONS</a> · 30-in-15 №9</span>
283
- </footer>
284
- </div><script>
285
- const EXAMPLES=["Who invented the World Wide Web, and what's the square root of 4096?",
286
- "What's the weather in Tokyo, and the current UTC time?",
287
- "Summarize what an octopus is, then give me a 12% tip on $86."];
288
- const $=id=>document.getElementById(id);
289
- const q=$('q'),go=$('go'),out=$('out');
290
- function esc(s){return String(s==null?'':s).replace(/[&<>]/g,c=>({'&':'&amp;','<':'&lt;','>':'&gt;'}[c]));}
291
- $('ex').innerHTML=EXAMPLES.map(e=>'<span class="chip"><span class="pt">↳</span>'+esc(e)+'</span>').join('');
292
- $('ex').querySelectorAll('.chip').forEach(c=>c.onclick=()=>{q.value=c.textContent.replace(/^↳\s*/,'');ask();});
293
- function argStr(o){try{return Object.values(o).join(', ');}catch(e){return '';}}
294
- function ask(){if(go.disabled)return;const text=q.value.trim();if(!text){q.focus();return;}
295
- go.disabled=true;go.textContent='…';out.classList.add('show');
296
- $('trace').innerHTML='<div class="spin"><span></span><span></span><span></span></div>';$('answer').innerHTML='';
297
- fetch('/api/ask',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({question:text})})
298
- .then(r=>r.json()).then(d=>{
299
- if(d.error){$('trace').innerHTML='<div class="row none"><span class="mk">!</span><span class="tn">error</span><span class="rd">'+esc(d.error)+'</span></div>';return;}
300
- const t=d.trace||[];
301
- $('trace').innerHTML=t.length?t.map(s=>'<div class="row"><span class="mk">»</span><span class="tn">'+esc(s.tool)+'</span><span class="rd"><span class="arg">'+esc(argStr(s.input))+'</span> → '+esc(s.result)+'</span></div>').join(''):
302
- '<div class="row none"><span class="mk">·</span><span class="tn">direct</span><span class="rd">answered directly — no tools needed</span></div>';
303
- $('answer').innerHTML=String(d.answer||'').split(/\\n\\n+/).map(p=>'<p>'+esc(p).replace(/\\n/g,'<br>')+'</p>').join('');
304
- }).catch(()=>{$('trace').innerHTML='<div class="row none"><span class="mk">!</span><span class="tn">error</span><span class="rd">Something went wrong — please try again.</span></div>';})
305
- .finally(()=>{go.disabled=false;go.textContent='Run ▸';});
306
- }
307
- q.addEventListener('keydown',e=>{if(e.key==='Enter')ask();});
308
- </script></body></html>"""
309
-
310
-
311
- if __name__ == "__main__":
312
- backend = "Claude API" if ANTHROPIC_KEY else "NO KEY (set ANTHROPIC_API_KEY)"
313
- print(f"Tool-Using Agent on http://127.0.0.1:{PORT} [backend: {backend}]", flush=True)
314
- app.run(host="0.0.0.0", port=PORT, threaded=True)
 
1
+ #!/usr/bin/env python
2
+ """Tool-Using Agent — ask a question and watch the AI call real, live tools to answer it:
3
+ a calculator, the current date/time, live weather, and Wikipedia. It runs the ReAct loop
4
+ (decide → call tool → read result → repeat) and shows every tool call it made.
5
+
6
+ All tools are keyless (Open-Meteo + MediaWiki), so the only secret is ANTHROPIC_API_KEY.
7
+
8
+ pip install flask requests anthropic
9
+ python app.py # http://127.0.0.1:7860
10
+
11
+ Project #9 of the "30 Projects in 15 Days" challenge — GritAI.
12
+ UI: GritAI engineered/industrial design system (dark, grit-orange, IBM Plex + Archivo).
13
+ """
14
+ import os, ast, json, math, operator, datetime, urllib.parse
15
+ from flask import Flask, request, jsonify, Response
16
+ import requests
17
+
18
+ PORT = int(os.environ.get("PORT", "7860"))
19
+ ANTHROPIC_KEY = os.environ.get("ANTHROPIC_API_KEY")
20
+ ANTHROPIC_MODEL = os.environ.get("ANTHROPIC_MODEL", "claude-haiku-4-5")
21
+ MAX_STEPS = 6
22
+ UA = {"User-Agent": "GritAI-ToolAgent/1.0 (https://gritai.solutions)"}
23
+
24
+ # --------------------------------------------------------------------------- tools
25
+ _OPS = {ast.Add: operator.add, ast.Sub: operator.sub, ast.Mult: operator.mul,
26
+ ast.Div: operator.truediv, ast.Pow: operator.pow, ast.Mod: operator.mod,
27
+ ast.FloorDiv: operator.floordiv, ast.USub: operator.neg, ast.UAdd: operator.pos}
28
+ _FUNCS = {"sqrt": math.sqrt, "abs": abs, "round": round, "log": math.log, "log10": math.log10,
29
+ "sin": math.sin, "cos": math.cos, "tan": math.tan, "pi": math.pi, "e": math.e,
30
+ "floor": math.floor, "ceil": math.ceil, "exp": math.exp, "min": min, "max": max}
31
+
32
+
33
+ def _safe_eval(node):
34
+ if isinstance(node, ast.Constant):
35
+ if isinstance(node.value, (int, float)):
36
+ return node.value
37
+ raise ValueError("only numbers")
38
+ if isinstance(node, ast.BinOp):
39
+ return _OPS[type(node.op)](_safe_eval(node.left), _safe_eval(node.right))
40
+ if isinstance(node, ast.UnaryOp):
41
+ return _OPS[type(node.op)](_safe_eval(node.operand))
42
+ if isinstance(node, ast.Name):
43
+ if node.id in _FUNCS:
44
+ return _FUNCS[node.id]
45
+ raise ValueError(f"unknown name {node.id}")
46
+ if isinstance(node, ast.Call):
47
+ fn = _FUNCS.get(getattr(node.func, "id", ""))
48
+ if not callable(fn):
49
+ raise ValueError("unknown function")
50
+ return fn(*[_safe_eval(a) for a in node.args])
51
+ raise ValueError("unsupported expression")
52
+
53
+
54
+ def tool_calculator(expression):
55
+ try:
56
+ val = _safe_eval(ast.parse(str(expression), mode="eval").body)
57
+ return f"{expression} = {val}"
58
+ except Exception as e:
59
+ return f"Could not evaluate '{expression}': {e}"
60
+
61
+
62
+ def tool_datetime(timezone="UTC"):
63
+ now = datetime.datetime.now(datetime.timezone.utc)
64
+ return f"Current UTC date/time: {now.strftime('%A, %d %B %Y, %H:%M UTC')}"
65
+
66
+
67
+ _WMO = {0: "clear sky", 1: "mainly clear", 2: "partly cloudy", 3: "overcast", 45: "fog", 48: "rime fog",
68
+ 51: "light drizzle", 53: "drizzle", 55: "dense drizzle", 61: "light rain", 63: "rain",
69
+ 65: "heavy rain", 71: "light snow", 73: "snow", 75: "heavy snow", 80: "rain showers",
70
+ 81: "rain showers", 82: "violent rain showers", 95: "thunderstorm", 96: "thunderstorm w/ hail"}
71
+
72
+
73
+ def tool_weather(location):
74
+ try:
75
+ g = requests.get("https://geocoding-api.open-meteo.com/v1/search",
76
+ params={"name": location, "count": 1}, headers=UA, timeout=15).json()
77
+ if not g.get("results"):
78
+ return f"No location found for '{location}'."
79
+ r = g["results"][0]
80
+ lat, lon = r["latitude"], r["longitude"]
81
+ place = ", ".join(filter(None, [r.get("name"), r.get("admin1"), r.get("country")]))
82
+ w = requests.get("https://api.open-meteo.com/v1/forecast",
83
+ params={"latitude": lat, "longitude": lon,
84
+ "current": "temperature_2m,relative_humidity_2m,weather_code,wind_speed_10m"},
85
+ headers=UA, timeout=15).json()
86
+ c = w.get("current", {})
87
+ desc = _WMO.get(c.get("weather_code"), "unknown")
88
+ return (f"Weather in {place}: {c.get('temperature_2m')}°C, {desc}, "
89
+ f"humidity {c.get('relative_humidity_2m')}%, wind {c.get('wind_speed_10m')} km/h.")
90
+ except Exception as e:
91
+ return f"Weather lookup failed: {e}"
92
+
93
+
94
+ def tool_wikipedia(query):
95
+ try:
96
+ s = requests.get("https://en.wikipedia.org/w/api.php", headers=UA, timeout=15,
97
+ params={"action": "query", "list": "search", "srsearch": query,
98
+ "format": "json", "srlimit": 1}).json()
99
+ hits = s.get("query", {}).get("search", [])
100
+ if not hits:
101
+ return f"No Wikipedia article found for '{query}'."
102
+ title = hits[0]["title"]
103
+ e = requests.get("https://en.wikipedia.org/w/api.php", headers=UA, timeout=15,
104
+ params={"action": "query", "prop": "extracts", "exintro": 1, "explaintext": 1,
105
+ "titles": title, "format": "json"}).json()
106
+ pages = e.get("query", {}).get("pages", {})
107
+ extract = next(iter(pages.values()), {}).get("extract", "")
108
+ return f"Wikipedia — {title}: {extract[:800]}" if extract else f"Found '{title}' but no summary."
109
+ except Exception as e:
110
+ return f"Wikipedia lookup failed: {e}"
111
+
112
+
113
+ TOOLS_SPEC = [
114
+ {"name": "calculator", "description": "Evaluate an arithmetic expression. Supports + - * / ** % and "
115
+ "sqrt, log, sin, cos, tan, floor, ceil, abs, round, pi, e.",
116
+ "input_schema": {"type": "object", "properties": {"expression": {"type": "string"}},
117
+ "required": ["expression"]}},
118
+ {"name": "current_datetime", "description": "Get the current date and time (UTC).",
119
+ "input_schema": {"type": "object", "properties": {"timezone": {"type": "string"}}}},
120
+ {"name": "weather", "description": "Get the current weather for a city/place name (live).",
121
+ "input_schema": {"type": "object", "properties": {"location": {"type": "string"}},
122
+ "required": ["location"]}},
123
+ {"name": "wikipedia", "description": "Look up a topic on Wikipedia and get a summary (live).",
124
+ "input_schema": {"type": "object", "properties": {"query": {"type": "string"}},
125
+ "required": ["query"]}},
126
+ ]
127
+ EXECUTORS = {"calculator": tool_calculator, "current_datetime": tool_datetime,
128
+ "weather": tool_weather, "wikipedia": tool_wikipedia}
129
+
130
+
131
+ def run_agent(question):
132
+ import anthropic
133
+ client = anthropic.Anthropic(api_key=ANTHROPIC_KEY)
134
+ sysp = ("You are a helpful assistant that answers using the provided tools whenever they help. "
135
+ "Call tools to get live/precise data instead of guessing. You may call multiple tools. "
136
+ "When you have enough, give a clear, concise final answer.")
137
+ msgs = [{"role": "user", "content": question}]
138
+ trace = []
139
+ for _ in range(MAX_STEPS):
140
+ r = client.messages.create(model=ANTHROPIC_MODEL, max_tokens=1024, system=sysp,
141
+ tools=TOOLS_SPEC, messages=msgs)
142
+ if r.stop_reason == "tool_use":
143
+ msgs.append({"role": "assistant", "content": r.content})
144
+ results = []
145
+ for b in r.content:
146
+ if b.type == "tool_use":
147
+ out = EXECUTORS.get(b.name, lambda **k: "unknown tool")(**b.input)
148
+ trace.append({"tool": b.name, "input": b.input, "result": out[:400]})
149
+ results.append({"type": "tool_result", "tool_use_id": b.id, "content": out})
150
+ msgs.append({"role": "user", "content": results})
151
+ else:
152
+ text = "".join(b.text for b in r.content if b.type == "text")
153
+ return text.strip(), trace
154
+ return "I reached the step limit before finishing — try a simpler question.", trace
155
+
156
+
157
+ app = Flask(__name__)
158
+ app.config["MAX_CONTENT_LENGTH"] = 512 * 1024
159
+
160
+
161
+ @app.route("/")
162
+ def home():
163
+ return Response(PAGE, mimetype="text/html")
164
+
165
+
166
+ @app.route("/api/ask", methods=["POST"])
167
+ def api_ask():
168
+ q = (request.get_json(force=True).get("question") or "").strip()[:1000]
169
+ if not q:
170
+ return jsonify(error="Ask a question."), 400
171
+ if not ANTHROPIC_KEY:
172
+ return jsonify(error="Set ANTHROPIC_API_KEY on the server to run the agent."), 200
173
+ try:
174
+ answer, trace = run_agent(q)
175
+ except Exception as e:
176
+ import sys; print("agent error:", type(e).__name__, file=sys.stderr, flush=True)
177
+ return jsonify(error="The agent hit an error — please try again."), 200
178
+ return jsonify(answer=answer, trace=trace)
179
+
180
+
181
+ # ===================== GritAI engineered/industrial design system =====================
182
+ PAGE = """<!doctype html><html lang="en"><head><meta charset="utf-8">
183
+ <title>GritAI · Tool-Using Agent</title>
184
+ <meta name="viewport" content="width=device-width,initial-scale=1">
185
+ <link rel="preconnect" href="https://fonts.googleapis.com">
186
+ <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
187
+ <link href="https://fonts.googleapis.com/css2?family=Archivo:wght@600;700;800;900&family=IBM+Plex+Mono:wght@400;500;600&family=IBM+Plex+Sans:wght@400;500;600&display=swap" rel="stylesheet">
188
+ <style>
189
+ :root{--bg:#0a0b0e;--bg2:#0e1015;--panel:#111318;--ink:#eef0f4;--dim:#9aa1b0;--dim2:#5f6675;--line:#20242e;--line2:#2b303c;
190
+ --grit:#ff5a2a;--grit2:#ff7d54;--grit-dim:#c9451f;
191
+ --disp:'Archivo',system-ui,sans-serif;--body:'IBM Plex Sans',system-ui,sans-serif;--mono:'IBM Plex Mono',ui-monospace,monospace}
192
+ *{box-sizing:border-box}html,body{height:100%}
193
+ body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--body);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased;position:relative;overflow-x:hidden}
194
+ body::before{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;
195
+ background:linear-gradient(0deg,transparent 95%,rgba(255,90,42,.04) 100%),
196
+ repeating-linear-gradient(90deg,transparent 0 63px,rgba(255,255,255,.018) 63px 64px),
197
+ repeating-linear-gradient(0deg,transparent 0 63px,rgba(255,255,255,.018) 63px 64px),
198
+ radial-gradient(120% 80% at 50% -10%,#141821 0%,var(--bg) 55%)}
199
+ body::after{content:"";position:fixed;inset:0;z-index:0;pointer-events:none;opacity:.05;mix-blend-mode:overlay;
200
+ background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E")}
201
+ .wrap{position:relative;z-index:1;max-width:960px;margin:0 auto;padding:0 28px 70px}
202
+ header{display:flex;align-items:center;gap:16px;padding:22px 0 18px;border-bottom:1px solid var(--line);animation:fade .6s .02s both}
203
+ .mark{width:38px;height:38px;flex:none}.mark svg{display:block}
204
+ .brand{display:flex;flex-direction:column;line-height:1}
205
+ .brand .co{font-family:var(--disp);font-weight:900;font-size:19px;letter-spacing:.5px}.brand .co b{color:var(--grit)}
206
+ .brand .sub{font-family:var(--mono);font-size:10.5px;letter-spacing:.28em;text-transform:uppercase;color:var(--dim2);margin-top:5px}
207
+ .tags{margin-left:auto;display:flex;gap:8px}
208
+ .tag{font-family:var(--mono);font-size:10px;letter-spacing:.14em;text-transform:uppercase;color:var(--dim);border:1px solid var(--line2);border-radius:2px;padding:5px 9px}
209
+ .tag.hot{color:var(--grit);border-color:var(--grit-dim)}
210
+ .hero{padding:34px 0 26px;animation:fade .6s .12s both}
211
+ .hero h1{font-family:var(--disp);font-weight:800;font-size:clamp(30px,5.4vw,52px);line-height:1.02;letter-spacing:-.02em;margin:0;max-width:16ch}
212
+ .hero h1 em{font-style:normal;color:var(--grit)}
213
+ .hero p{color:var(--dim);max-width:56ch;margin:16px 0 0;font-size:15.5px}
214
+ .sec{display:flex;align-items:center;gap:14px;margin:30px 0 14px}
215
+ .sec .num{font-family:var(--mono);font-size:11px;font-weight:600;color:var(--grit);letter-spacing:.1em}
216
+ .sec .name{font-family:var(--mono);font-size:11px;font-weight:500;letter-spacing:.26em;text-transform:uppercase;color:var(--dim)}
217
+ .sec .rule{flex:1;height:1px;background:linear-gradient(90deg,var(--line2),transparent)}
218
+ .ask{animation:fade .6s .2s both}
219
+ .field{display:flex;align-items:stretch;border:1px solid var(--line2);border-radius:3px;background:var(--panel);overflow:hidden;transition:border-color .18s}
220
+ .field:focus-within{border-color:var(--grit-dim)}
221
+ .field .car{font-family:var(--mono);color:var(--grit);padding:16px 0 16px 16px;font-size:15px;user-select:none}
222
+ .field input{flex:1;background:transparent;border:0;outline:none;color:var(--ink);font-family:var(--body);font-size:15.5px;padding:16px 14px}
223
+ .field input::placeholder{color:var(--dim2)}
224
+ .run{border:0;background:var(--grit);color:#140a06;font-family:var(--mono);font-weight:600;font-size:13px;letter-spacing:.14em;text-transform:uppercase;padding:0 24px;cursor:pointer;transition:.16s;box-shadow:-1px 0 0 var(--grit-dim)}
225
+ .run:hover{background:var(--grit2);box-shadow:0 0 26px -4px rgba(255,90,42,.55)}
226
+ .run:disabled{opacity:.55;cursor:default;box-shadow:none}
227
+ .ex{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
228
+ .chip{font-family:var(--mono);font-size:12px;color:var(--dim);background:var(--panel);border:1px solid var(--line);border-radius:2px;padding:8px 11px;cursor:pointer;transition:.15s}
229
+ .chip:hover{color:var(--grit);border-color:var(--grit-dim)}
230
+ .chip .pt{color:var(--dim2);margin-right:7px}
231
+ .out{display:none}.out.show{display:block}
232
+ .trace{border:1px solid var(--line);border-radius:3px;background:linear-gradient(180deg,var(--panel),var(--bg2))}
233
+ .log{font-family:var(--mono);font-size:13px;line-height:1.75}
234
+ .row{display:grid;grid-template-columns:22px 100px 1fr;gap:0 12px;padding:13px 18px;border-bottom:1px solid var(--line);animation:slidein .45s both}
235
+ .row:last-child{border-bottom:0}
236
+ .row .mk{color:var(--grit);font-weight:600}
237
+ .row .tn{color:var(--grit2);text-transform:uppercase;letter-spacing:.06em;font-weight:500}
238
+ .row .rd{color:var(--ink);word-break:break-word}.row .rd .arg{color:var(--dim2)}
239
+ .row.none .rd{color:var(--dim)}
240
+ .ans{border:1px solid var(--line2);border-left:2px solid var(--grit);border-radius:3px;background:var(--panel);padding:22px 24px}
241
+ .ans p{margin:0 0 12px;font-size:16px;line-height:1.65}.ans p:last-child{margin-bottom:0}
242
+ .spin{display:inline-flex;gap:6px;padding:16px 18px}.spin span{width:8px;height:8px;border-radius:50%;background:var(--grit);opacity:.5;animation:bd 1.2s infinite}
243
+ .spin span:nth-child(2){animation-delay:.18s}.spin span:nth-child(3){animation-delay:.36s}
244
+ footer{margin-top:34px;padding-top:16px;border-top:1px solid var(--line);font-family:var(--mono);font-size:11px;letter-spacing:.06em;color:var(--dim2);display:flex;gap:16px;flex-wrap:wrap;animation:fade .6s .5s both}
245
+ footer .b{color:var(--dim)}footer .sp{margin-left:auto}
246
+ footer a{color:var(--dim);text-decoration:none}footer a:hover{color:var(--grit)}
247
+ @keyframes fade{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
248
+ @keyframes slidein{from{opacity:0;transform:translateX(-8px)}to{opacity:1;transform:none}}
249
+ @keyframes bd{0%,60%,100%{transform:translateY(0);opacity:.35}30%{transform:translateY(-6px);opacity:1}}
250
+ </style></head>
251
+ <body><div class="wrap">
252
+ <header>
253
+ <div class="mark"><svg width="38" height="38" viewBox="0 0 38 38" fill="none">
254
+ <rect x="1" y="1" width="36" height="36" rx="2" stroke="#2b303c"/>
255
+ <path d="M27 12.5A9 9 0 1 0 28 22H19" stroke="#ff5a2a" stroke-width="2.4" stroke-linecap="square"/>
256
+ <rect x="10.5" y="10.5" width="3" height="3" fill="#ff5a2a"/>
257
+ </svg></div>
258
+ <div class="brand"><div class="co">GRIT<b>AI</b></div><div class="sub">Tool-Using Agent</div></div>
259
+ <div class="tags"><span class="tag hot">▸ Live</span><span class="tag">SDVOSB</span><span class="tag">Lawton OK</span></div>
260
+ </header>
261
+ <section class="hero">
262
+ <h1>Ask it anything. It <em>calls real tools</em> to answer.</h1>
263
+ <p>A calculator, a clock, live weather, and Wikipedia — the agent decides what to call, runs it, and shows its work. Not a chatbot guessing. An operator.</p>
264
+ </section>
265
+ <div class="sec"><span class="num">01</span><span class="name">Ask</span><span class="rule"></span></div>
266
+ <div class="ask">
267
+ <div class="field">
268
+ <span class="car">&gt;_</span>
269
+ <input id="q" placeholder="What's a 15% tip on $47.80, and the current weather in Paris?" autofocus>
270
+ <button class="run" id="go" onclick="ask()">Run ▸</button>
271
+ </div>
272
+ <div class="ex" id="ex"></div>
273
+ </div>
274
+ <div class="out" id="out">
275
+ <div class="sec"><span class="num">02</span><span class="name">Trace — live tool calls</span><span class="rule"></span></div>
276
+ <div class="trace"><div class="log" id="trace"></div></div>
277
+ <div class="sec"><span class="num">03</span><span class="name">Answer</span><span class="rule"></span></div>
278
+ <div class="ans" id="answer"></div>
279
+ </div>
280
+ <footer>
281
+ <span class="b">ReAct loop</span><span>·</span><span>keyless tools — Open-Meteo + Wikipedia</span>
282
+ <span class="sp"><a href="https://gritai.solutions">GRITAI SOLUTIONS</a> · 30-in-15 №9</span>
283
+ </footer>
284
+ </div><script>
285
+ const EXAMPLES=["Who invented the World Wide Web, and what's the square root of 4096?",
286
+ "What's the weather in Tokyo, and the current UTC time?",
287
+ "Summarize what an octopus is, then give me a 12% tip on $86."];
288
+ const $=id=>document.getElementById(id);
289
+ const q=$('q'),go=$('go'),out=$('out');
290
+ function esc(s){return String(s==null?'':s).replace(/[&<>]/g,c=>({'&':'&amp;','<':'&lt;','>':'&gt;'}[c]));}
291
+ $('ex').innerHTML=EXAMPLES.map(e=>'<span class="chip"><span class="pt">↳</span>'+esc(e)+'</span>').join('');
292
+ $('ex').querySelectorAll('.chip').forEach(c=>c.onclick=()=>{q.value=c.textContent.replace(/^↳\s*/,'');ask();});
293
+ function argStr(o){try{return Object.values(o).join(', ');}catch(e){return '';}}
294
+ function ask(){if(go.disabled)return;const text=q.value.trim();if(!text){q.focus();return;}
295
+ go.disabled=true;go.textContent='…';out.classList.add('show');
296
+ $('trace').innerHTML='<div class="spin"><span></span><span></span><span></span></div>';$('answer').innerHTML='';
297
+ fetch('/api/ask',{method:'POST',headers:{'Content-Type':'application/json'},body:JSON.stringify({question:text})})
298
+ .then(r=>r.json()).then(d=>{
299
+ if(d.error){$('trace').innerHTML='<div class="row none"><span class="mk">!</span><span class="tn">error</span><span class="rd">'+esc(d.error)+'</span></div>';return;}
300
+ const t=d.trace||[];
301
+ $('trace').innerHTML=t.length?t.map(s=>'<div class="row"><span class="mk">»</span><span class="tn">'+esc(s.tool)+'</span><span class="rd"><span class="arg">'+esc(argStr(s.input))+'</span> → '+esc(s.result)+'</span></div>').join(''):
302
+ '<div class="row none"><span class="mk">·</span><span class="tn">direct</span><span class="rd">answered directly — no tools needed</span></div>';
303
+ $('answer').innerHTML=String(d.answer||'').split(/\\n\\n+/).map(p=>'<p>'+esc(p).replace(/\\n/g,'<br>')+'</p>').join('');
304
+ }).catch(()=>{$('trace').innerHTML='<div class="row none"><span class="mk">!</span><span class="tn">error</span><span class="rd">Something went wrong — please try again.</span></div>';})
305
+ .finally(()=>{go.disabled=false;go.textContent='Run ▸';});
306
+ }
307
+ q.addEventListener('keydown',e=>{if(e.key==='Enter')ask();});
308
+ </script></body></html>"""
309
+
310
+
311
+ if __name__ == "__main__":
312
+ backend = "Claude API" if ANTHROPIC_KEY else "NO KEY (set ANTHROPIC_API_KEY)"
313
+ print(f"Tool-Using Agent on http://127.0.0.1:{PORT} [backend: {backend}]", flush=True)
314
+ app.run(host="0.0.0.0", port=PORT, threaded=True)