example-node-guard-policy/index.html at main · arcjet/example-node-guard-policy · GitHub

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<!doctype html>
<html lang="en">
  <head>
    <meta charset="utf-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1" />
    <title>On behalf of the wrong client</title>
    <style>
      :root {
        color-scheme: light dark;
        font-family:
          ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
        line-height: 1.5;
      }

      body {
        margin: 0;
      }

      main {
        max-width: 52rem;
        margin: 0 auto;
        padding: 2rem 1rem 4rem;
      }

      form,
      section {
        margin-block: 1.5rem;
        padding: 1rem;
        border: 1px solid color-mix(in srgb, currentColor 20%, transparent);
        border-radius: 0.5rem;
      }

      select,
      button {
        box-sizing: border-box;
        max-width: 100%;
        padding: 0.5rem 0.75rem;
        font: inherit;
      }

      pre {
        padding: 0.75rem;
        overflow-x: auto;
        border-radius: 0.25rem;
        background: color-mix(in srgb, currentColor 8%, transparent);
        white-space: pre-wrap;
        overflow-wrap: anywhere;
      }

      h1,
      h2,
      h3 {
        line-height: 1.2;
      }

      .trace-list {
        display: grid;
        gap: 0.75rem;
        padding: 0;
        list-style: none;
      }

      .trace-list li {
        padding: 0.75rem;
        border: 1px solid color-mix(in srgb, currentColor 15%, transparent);
        border-radius: 0.25rem;
      }

      .trace-list pre {
        margin-bottom: 0;
      }
    </style>
  </head>
  <body>
    <main>
      <h1>On behalf of the wrong client</h1>
      <p>
        A Vercel AI SDK financial adviser reads a support thread and chooses which tools to call.
        Arcjet guards the email tool at the boundary before its side effect can run.
      </p>
      <form id="form">
        <p>
          <label>
            Client<br />
            <select name="client" required>
              <option value="client-a">Client A — Alex Morgan</option>
              <option value="client-b">Client B — Jamie Taylor</option>
            </select>
          </label>
        </p>
        <p>
          <label>
            Scenario<br />
            <select name="scenario" required>
              <option value="benign">Benign request</option>
              <option value="wrong-recipient">Wrong recipient</option>
              <option value="pii-leak">Sensitive information leak</option>
              <option value="injection">Layered defense</option>
            </select>
          </label>
        </p>
        <p id="model-field" hidden>
          <label>
            Model<br />
            <select name="model">
              <option value="gpt-4o-mini">GPT-4o mini (2024)</option>
              <option value="gpt-5-mini">GPT-5 mini (2025)</option>
              <option value="gpt-5.6-sol">GPT-5.6 Sol (latest)</option>
            </select>
          </label>
        </p>
        <section id="scenario-details" aria-live="polite">
          <h2>Run context</h2>
          <h3>Inbound customer message (untrusted)</h3>
          <pre id="inbound-message">Loading…</pre>
          <h3><code>getClientRecord</code> returns</h3>
          <pre id="client-record">Loading…</pre>
          <h3>Allowed recipients for this client</h3>
          <pre id="allowed-recipients">Loading…</pre>
        </section>
        <button>Handle latest support request</button>
      </form>
      <section id="result" aria-live="polite" hidden></section>
    </main>
    <script>
      const form = document.querySelector("#form");
      const result = document.querySelector("#result");
      const inboundMessage = document.querySelector("#inbound-message");
      const clientRecord = document.querySelector("#client-record");
      const allowedRecipients = document.querySelector("#allowed-recipients");
      const modelField = document.querySelector("#model-field");
      let demoContext;

      function showScenarioDetails() {
        if (!demoContext) return;
        const fields = new FormData(form);
        const client = demoContext.clients[fields.get("client")];
        const scenario = demoContext.scenarios[fields.get("scenario")];
        modelField.hidden = fields.get("scenario") !== "injection";
        inboundMessage.textContent = scenario.message;
        clientRecord.textContent = JSON.stringify(
          {
            clientId: client.actor,
            record: client.record,
          },
          null,
          2,
        );
        allowedRecipients.textContent = JSON.stringify(client.allowedRecipients, null, 2);
      }

      form.addEventListener("change", showScenarioDetails);
      fetch("/context")
        .then((response) => response.json())
        .then((context) => {
          demoContext = context;
          showScenarioDetails();
        });

      function showResult(data) {
        const heading = document.createElement("h2");
        heading.textContent = data.sentEmail ? "Email sent (simulated)" : "No email sent";
        const description = document.createElement("p");
        description.textContent = data.message || "The agent did not return a response.";
        const content = [heading];
        if (data.model) {
          const model = document.createElement("p");
          model.textContent = `Model: ${demoContext?.models[data.model]?.label || data.model}`;
          content.push(model);
        }
        content.push(description);

        if (data.guardResult) {
          const decisionHeading = document.createElement("h3");
          decisionHeading.textContent = "Guard result";
          const decision = document.createElement("p");
          decision.textContent = data.guardResult.summary;
          const decisionJson = document.createElement("pre");
          decisionJson.textContent = JSON.stringify(data.guardResult, null, 2);
          content.push(decisionHeading, decision, decisionJson);
        }

        if (data.sentEmail) {
          const emailHeading = document.createElement("h3");
          emailHeading.textContent = "Sent email";
          const emailJson = document.createElement("pre");
          emailJson.textContent = JSON.stringify(data.sentEmail, null, 2);
          content.push(emailHeading, emailJson);
        }

        const traceHeading = document.createElement("h3");
        traceHeading.textContent = "Tool trace";
        const list = document.createElement("ul");
        list.className = "trace-list";
        for (const event of data.trace || []) {
          const item = document.createElement("li");
          const detail = event.type === "tool-call" ? event.input : event.output;
          const label = document.createElement("strong");
          label.textContent = `${event.type}: ${event.tool}`;
          const detailJson = document.createElement("pre");
          detailJson.textContent = JSON.stringify(detail ?? null, null, 2);
          item.append(label, detailJson);
          list.append(item);
        }
        content.push(traceHeading, list);
        result.replaceChildren(...content);
        result.hidden = false;
      }

      form.addEventListener("submit", async (event) => {
        event.preventDefault();
        const button = form.querySelector("button");
        button.disabled = true;
        button.textContent = "Generating and evaluating…";
        try {
          const fields = new FormData(form);
          const response = await fetch("/evaluate", {
            method: "POST",
            headers: { "content-type": "application/json" },
            body: JSON.stringify({
              client: fields.get("client"),
              scenario: fields.get("scenario"),
              model: fields.get("model"),
            }),
          });
          showResult(await response.json());
        } catch (error) {
          showResult({ message: error instanceof Error ? error.message : "Unknown error" });
        } finally {
          button.disabled = false;
          button.textContent = "Handle latest support request";
        }
      });
    </script>
  </body>
</html>