From f3dbadb82b235fc9dddb60f639621114b7d98f76 Mon Sep 17 00:00:00 2001
From: Alison Shao <54658187+alisonshao@users.noreply.github.com>
Date: Sat, 2 May 2026 00:58:15 -0700
Subject: [PATCH] fix: accept 0-indexed safetensors shard names in CI weight
 validator (#24237)

---
 python/sglang/srt/model_loader/ci_weight_validation.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/python/sglang/srt/model_loader/ci_weight_validation.py b/python/sglang/srt/model_loader/ci_weight_validation.py
index b5220e922..4be11ef1d 100644
--- a/python/sglang/srt/model_loader/ci_weight_validation.py
+++ b/python/sglang/srt/model_loader/ci_weight_validation.py
@@ -1426,7 +1426,10 @@ def _validate_sharded_model(
     for group_key, group_info in shard_groups.items():
         total_shards = group_info["total"]
         found_shards = set(group_info["found_shards"])
-        expected_shards = set(range(1, total_shards + 1))
+        # Shards may be 0-indexed (e.g. inclusionAI/Ring-2.5-1T) or 1-indexed
+        # (e.g. deepseek-ai/DeepSeek-V3); both are valid HF conventions.
+        min_idx = min(found_shards) if found_shards else 1
+        expected_shards = set(range(min_idx, min_idx + total_shards))
 
         # Check for missing shards
         missing_shards = expected_shards - found_shards