From 1a901892b044777ea5e4efe3f377a08be01ae990 Mon Sep 17 00:00:00 2001
From: a2a-cloud <noreply@a2acloud.io>
Date: Sat, 18 Jul 2026 07:36:31 +0000
Subject: [PATCH] a2a-source-edit: write frontend/src/a2a.js

---
 frontend/src/a2a.js | 62 ++++++++++++++++++++++++++++++++-------------
 1 file changed, 45 insertions(+), 17 deletions(-)

diff --git a/frontend/src/a2a.js b/frontend/src/a2a.js
index 589c168..498212a 100644
--- a/frontend/src/a2a.js
+++ b/frontend/src/a2a.js
@@ -6,9 +6,7 @@ export async function requestJson(url, init = {}) {
   const data = text ? JSON.parse(text) : null;
   if (!response.ok) {
     const detail = data && (data.detail || data.message);
-    const error = new Error(detail || `request failed: ${response.status}`);
-    error.status = response.status;
-    throw error;
+    throw new Error(detail || `request failed: ${response.status}`);
   }
   return data;
 }
@@ -22,9 +20,15 @@ export async function loadSession(config) {
 }
 
 export function signInUrl(config) {
+  // Always prefer authorizeUrl. The dashboard's login cookie is host-locked to
+  // the dashboard's own origin, so sending the browser straight to loginUrl
+  // signs the user in *there* and bounces back here still signed out.
+  // authorizeUrl hands this origin a code it trades for its own session.
   const target = config.auth?.authorizeUrl || config.auth?.loginUrl;
   if (!target) return null;
-  const next = encodeURIComponent(window.location.pathname + window.location.search + window.location.hash);
+  const next = encodeURIComponent(
+    window.location.pathname + window.location.search + window.location.hash,
+  );
   return `${target}${target.includes("?") ? "&" : "?"}next=${next}`;
 }
 
@@ -33,25 +37,49 @@ export async function requireSession(config) {
   if (!session?.authenticated) {
     const target = signInUrl(config);
     if (target) window.location.assign(target);
-    throw new Error("Please sign in to run ContractClock.");
+    throw new Error("sign in required");
   }
   return session;
 }
 
 export async function callSkill(config, skillName, args) {
-  try {
-    if (config.auth?.invokeRequiresSession) await requireSession(config);
-    return await requestJson(`${config.endpoints.invoke}/${encodeURIComponent(skillName)}`, {
+  if (config.auth?.invokeRequiresSession) {
+    await requireSession(config);
+  }
+  return requestJson(
+    `${config.endpoints.invoke}/${encodeURIComponent(skillName)}`,
+    {
       method: "POST",
       headers: { "content-type": "application/json" },
       body: JSON.stringify({ arguments: args }),
-    });
-  } catch (error) {
-    if (error.status === 401) {
-      const target = signInUrl(config);
-      if (target) window.location.assign(target);
-      throw new Error("Session expired. Re-authorizing…");
-    }
-    throw error;
-  }
+    },
+  );
+}
+
+export function sampleValue(schema) {
+  if (!schema || typeof schema !== "object") return null;
+  if ("default" in schema) return schema.default;
+  if ("const" in schema) return schema.const;
+  if (Array.isArray(schema.enum) && schema.enum.length) return schema.enum[0];
+  const type = Array.isArray(schema.type)
+    ? schema.type.find((item) => item !== "null") || schema.type[0]
+    : schema.type;
+  if (type === "array") return [];
+  if (type === "boolean") return false;
+  if (type === "integer" || type === "number") return 0;
+  if (type === "string") return "";
+  const props = schema.properties || {};
+  if (type === "object" || Object.keys(props).length) {
+    const required = Array.isArray(schema.required) ? schema.required : Object.keys(props);
+    return Object.fromEntries(
+      required.map((key) => [key, sampleValue(props[key])]),
+    );
+  }
+  return null;
+}
+
+export function sampleArgs(skill) {
+  const schema = skill?.input_schema || skill?.inputSchema || {};
+  const value = sampleValue(schema);
+  return value && typeof value === "object" && !Array.isArray(value) ? value : {};
 }