diff --git a/src/backend/codex-stdio.ts b/src/backend/codex-stdio.ts
index 8f4eca0..0abd9e7 100644
--- a/src/backend/codex-stdio.ts
+++ b/src/backend/codex-stdio.ts
@@ -911,7 +911,7 @@ function normalizeCodexNotification(message: JsonRecord, suppressed: SuppressedN
     const messageText = typeof error.message === "string" ? error.message : "Codex app-server error";
     const failureKind = classifyCodexErrorRecord(error, "backend-failed");
     const terminal = params.willRetry === true ? undefined : { status: "failed" as const, failureKind, message: redactText(messageText) };
-    return { events: [{ type: "error", payload: { failureKind, error: redactJson(error), willRetry: params.willRetry === true } }], ...(terminal ? { terminal } : {}) };
+    return { events: [{ type: "error", payload: { failureKind, message: redactText(messageText), error: redactJson(error), willRetry: params.willRetry === true, ...providerRetryDiagnostics(error, params) } }], ...(terminal ? { terminal } : {}) };
   }
   if (method === "turn/completed") {
     const turn = asRecordAt(params, "turn");
@@ -1435,6 +1435,7 @@ function notificationOtelAttributes(message: JsonRecord): JsonRecord {
     : method === "turn/completed" && turnStatus !== "completed"
       ? classifyCodexErrorRecord(Object.keys(error).length > 0 ? error : { message: turnStatus ?? "unknown" }, "backend-failed")
       : null;
+  const retryDiagnostics = method === "error" ? providerRetryDiagnostics(error, params) : {};
   return {
     method,
     itemId: stringAt(item, "id") ?? stringAt(params, "itemId"),
@@ -1444,11 +1445,65 @@ function notificationOtelAttributes(message: JsonRecord): JsonRecord {
     turnId: stringAt(turn, "id"),
     failureKind,
     willRetry: typeof params.willRetry === "boolean" ? params.willRetry : null,
+    ...retryDiagnostics,
     deltaChars: typeof params.delta === "string" ? params.delta.length : null,
     valuesPrinted: false,
   };
 }
 
+function providerRetryDiagnostics(error: JsonRecord, params: JsonRecord): JsonRecord {
+  const message = typeof error.message === "string" ? error.message : "";
+  const additionalDetails = typeof error.additionalDetails === "string" ? error.additionalDetails : "";
+  const text = `${message}\n${additionalDetails}`;
+  const retry = parseRetryCounter(text);
+  const responseStreamDisconnected = asRecordAt(asRecordAt(error, "codexErrorInfo"), "responseStreamDisconnected");
+  const upstreamHttpStatus = numberAt(responseStreamDisconnected, "httpStatusCode") ?? parseHttpStatus(text);
+  const retryBackoffMs = numberAt(error, "retryBackoffMs") ?? numberAt(error, "backoffMs") ?? numberAt(params, "retryBackoffMs") ?? numberAt(params, "backoffMs");
+  const providerErrorClass = providerErrorClassForText(text, upstreamHttpStatus);
+  return {
+    retryAttempt: retry?.attempt ?? null,
+    retryMax: retry?.max ?? null,
+    retryExhausted: retry ? retry.attempt >= retry.max : null,
+    retryBackoffMs,
+    upstreamHttpStatus,
+    upstreamHost: parseUrlHost(text),
+    providerErrorClass,
+    errorSummary: redactText(message || additionalDetails || providerErrorClass),
+    valuesPrinted: false,
+  };
+}
+
+function parseRetryCounter(text: string): { attempt: number; max: number } | null {
+  const match = /(?:reconnect(?:ing)?|retry(?:ing)?)?[^0-9]{0,24}(\d+)\s*\/\s*(\d+)/iu.exec(text);
+  if (!match) return null;
+  const attempt = Number(match[1]);
+  const max = Number(match[2]);
+  if (!Number.isFinite(attempt) || !Number.isFinite(max) || attempt < 0 || max <= 0) return null;
+  return { attempt: Math.floor(attempt), max: Math.floor(max) };
+}
+
+function parseHttpStatus(text: string): number | null {
+  const match = /(?:http\s*)?(?:status\s*)?(\b[1-5][0-9]{2}\b)/iu.exec(text);
+  if (!match) return null;
+  const status = Number(match[1]);
+  return Number.isFinite(status) ? status : null;
+}
+
+function parseUrlHost(text: string): string | null {
+  const match = /https?:\/\/([^\s/]+)(?:\/|\s|$)/iu.exec(text);
+  return match ? match[1].toLowerCase() : null;
+}
+
+function providerErrorClassForText(text: string, httpStatus: number | null): string {
+  const lower = text.toLowerCase();
+  if (httpStatus !== null) return httpStatus >= 500 ? "provider-http-5xx" : httpStatus === 429 ? "provider-rate-limit" : httpStatus === 401 || httpStatus === 403 ? "provider-auth" : "provider-http-status";
+  if (/connection refused|econnrefused|os error 111/u.test(lower)) return "provider-connection-refused";
+  if (/timed out|timeout|etimedout/u.test(lower)) return "provider-timeout";
+  if (/reset|econnreset/u.test(lower)) return "provider-connection-reset";
+  if (/disconnect|stream/u.test(lower)) return "provider-stream-disconnected";
+  return "provider-unavailable";
+}
+
 function toolCallSummaryFromNotification(message: JsonRecord): JsonRecord | null {
   const method = typeof message.method === "string" ? message.method : "";
   if (method !== "item/started" && method !== "item/completed") return null;
@@ -1609,6 +1664,11 @@ function stringAt(value: JsonRecord, key: string): string | null {
   return typeof value[key] === "string" && String(value[key]).length > 0 ? String(value[key]) : null;
 }
 
+function numberAt(value: JsonRecord, key: string): number | null {
+  const next = value[key];
+  return typeof next === "number" && Number.isFinite(next) ? next : null;
+}
+
 function shortHash(value: string): string {
   return createHash("sha256").update(value).digest("hex").slice(0, 12);
 }
diff --git a/src/mgr/server.ts b/src/mgr/server.ts
index a881853..494bf05 100644
--- a/src/mgr/server.ts
+++ b/src/mgr/server.ts
@@ -1024,6 +1024,14 @@ function emitRunEventOtelSpan(type: RunEvent["type"], payload: JsonRecord, run:
       threadId: stringJsonValue(payload.threadId),
       turnId: stringJsonValue(payload.turnId),
       willRetry: typeof payload.willRetry === "boolean" ? payload.willRetry : null,
+      retryAttempt: numberJsonValue(payload.retryAttempt),
+      retryMax: numberJsonValue(payload.retryMax),
+      retryExhausted: typeof payload.retryExhausted === "boolean" ? payload.retryExhausted : null,
+      retryBackoffMs: numberJsonValue(payload.retryBackoffMs),
+      upstreamHttpStatus: numberJsonValue(payload.upstreamHttpStatus),
+      upstreamHost: stringJsonValue(payload.upstreamHost),
+      providerErrorClass: stringJsonValue(payload.providerErrorClass),
+      errorSummary: boundedJsonString(payload.errorSummary, 300),
       message: boundedJsonString(payload.message, 300),
     },
   });