Support BLASST sparsity

config.json

@@ -264,5 +264,30 @@
     "use_mtp": true,
     "use_qk_norm": true,
     "use_routing_bias": true,
-    "vocab_size": 200064
-}
+    "vocab_size": 200064,
+    "sparse_attention_config": {
+        "config_groups": {
+            "group_0": {
+                "sparse_algo": "softmax_skip",
+                "targets": [
+                    "MiniMaxM2Attention"
+                ]
+            }
+        },
+        "threshold_scale_factor": {
+            "formula": "a * exp(b * target_sparsity)",
+            "prefill": {
+                "a": 87.239981,
+                "b": 5.3221
+            },
+            "decode": {
+                "a": 0.032140,
+                "b": 11.7877
+            }
+        },
+        "producer": {
+            "name": "modelopt",
+            "version": "0.43.0.dev27+g26aa1d0b1"
+        }
+    }
+}