Update.

tai_pkg/chat.py

@@ -163,6 +163,31 @@ class ChatClient:
             headers.update(extra)
         return headers
 
+    @staticmethod
+    def summarize_errors(errors, shown=2, width=320):
+        """One-line summary of a failed retry round.
+
+        Missing-CLI entries are expected on machines without those CLIs,
+        so actionable failures lead and the missing-CLI tail never takes
+        the only display slot (CLI candidates run last, and the muse
+        candidate is always appended even when its binary is absent).
+        """
+        if not errors:
+            return "no details"
+        actionable = [entry for entry in errors if "CLI not found" not in entry]
+        pool = actionable or errors
+        unique = []
+        for entry in pool:
+            if entry not in unique:
+                unique.append(entry)
+        text = "; ".join(unique[:shown])
+        if len(unique) > shown:
+            text += "; +%d more" % (len(unique) - shown)
+        skipped = len(errors) - len(pool)
+        if skipped:
+            text += " (%d missing CLI skipped)" % skipped
+        return text[:width]
+
     def complete(self, messages, tools=None, stream_sink=None, ephemeral=False, deadline=None):
         payload = {"model": self.config.model, "messages": messages}
         if tools:
@@ -183,8 +208,11 @@ class ChatClient:
             pause = Consts.RETRY_BACKOFF[min(round_no, len(Consts.RETRY_BACKOFF) - 1)]
             round_no += 1
             if give_up is not None and time.time() + pause > give_up:
-                raise BackendError("all backends failed after %d rounds (%s)" % (round_no, "; ".join(errors[-6:])))
-            print(Render.paint("all %d backends failed (round %d), retrying in %ds: %s" % (len(cands), round_no, pause, (errors[-1] if errors else "")[:160]), Ansi.DIM), file=sys.stderr)
+                raise BackendError("all backends failed after %d rounds (%s)" % (round_no, self.summarize_errors(errors, shown=6, width=900)))
+            providers = len(set((cand["provider"], cand["chat_url"]) for cand in cands))
+            if sys.stderr.isatty():
+                sys.stderr.write("\n")
+            print(Render.paint("all %d candidate%s across %d backend%s failed (round %d), retrying in %ds: %s" % (len(cands), "" if len(cands) == 1 else "s", providers, "" if providers == 1 else "s", round_no, pause, self.summarize_errors(errors)), Ansi.DIM), file=sys.stderr)
             if round_no == 1 and not Opencode.opencode_binary():
                 engine = Sandbox.container_engine()
                 if engine and Sandbox.box_state(engine) == "missing":