fix: prioritize preferred GPU routes with fallback

README.md

@@ -444,11 +444,18 @@ durable Git checkpoint per roughly 2,000 scanned rows. Raw rows are discarded
 after every aggregate merge. Transient API failure pauses at the current cursor
 for the next poll cycle; successful completion disables the scan permanently.
 
+Version `2026.09.18.1` keeps the first six ranked GPUs as the preferred routes
+for each model and only falls back to lower-ranked eligible GPUs when all six
+preferred routes are unavailable. Candidate generation retains at most six
+routes per model, preserving successful-route and queue ordering without
+discarding capacity on lower-ranked GPUs when the preferred tranche cannot run
+the model.
+
 ## Deploy
 
 Create a tag and submit the repository URL plus tag in "我的适配智能体".
 
 ```bash
-git tag -a agent-v33 -m "ModelHub agent 2026.09.04.4"
+git tag -a agent-v34 -m "ModelHub agent 2026.09.18.1"
-git push origin main agent-v33
+git push origin main agent-v34
 ```

modelhub_submmit_api/main.py

@@ -65,6 +65,7 @@ DEFAULT_RUNS_DIR = Path("runs")
 DEFAULT_LEDGER_PATH = Path("ledger/submissions.jsonl")
 ADAPTIVE_SCAN_MAX_MODELS = 3000
 ADAPTIVE_SCAN_MIN_FALLBACK_MODELS = 500
+MAX_ROUTES_PER_MODEL = 6
 
 
 def build_parser() -> argparse.ArgumentParser:
@@ -571,9 +572,16 @@ def process_model_for_candidates(
     skipped: list[dict[str, Any]] = []
     failed: list[dict[str, Any]] = []
     allowed_task_types_set = [spec.task_type for spec in specs]
-    pending_task_types_by_gpu: list[tuple[str, list[str]]] = []
+    # Preserve the routing order: the first six GPUs are the preferred
+    # tranche.  Lower-ranked GPUs are a fallback only when the preferred
+    # tranche produces no candidate for this model.  This keeps queue/quality
+    # prioritization deterministic while still recovering from a model being
+    # already processed, too large, or unsupported on every preferred GPU.
+    preferred_target_gpus = target_gpus[:MAX_ROUTES_PER_MODEL]
+    fallback_target_gpus = target_gpus[MAX_ROUTES_PER_MODEL:]
 
-    route_target_gpus = target_gpus[:6] if official_registry is not None else target_gpus
+    def prepare_pending_routes(route_target_gpus: list[str]) -> list[tuple[str, list[str]]]:
+        pending: list[tuple[str, list[str]]] = []
         for target_gpu in route_target_gpus:
             if submission_exclusion_store is not None and submission_exclusion_store.is_blocked(model.repo_id, target_gpu):
                 skipped.append(
@@ -616,9 +624,22 @@ def process_model_for_candidates(
                 if market_intelligence is not None and market_intelligence.has_framework_route(task_type, target_gpu):
                     compatible_task_types.append(task_type)
             if not compatible_task_types:
-            skipped.append({"repoId": model.repo_id, "targetGpu": target_gpu, "reason": "no_compatible_auto_template_or_framework"})
+                skipped.append(
+                    {
+                        "repoId": model.repo_id,
+                        "targetGpu": target_gpu,
+                        "reason": "no_compatible_auto_template_or_framework",
+                    }
+                )
                 continue
-        pending_task_types_by_gpu.append((target_gpu, compatible_task_types))
+            pending.append((target_gpu, compatible_task_types))
+        return pending
+
+    pending_task_types_by_gpu = prepare_pending_routes(preferred_target_gpus)
+    used_fallback_routes = False
+    if not pending_task_types_by_gpu and fallback_target_gpus:
+        pending_task_types_by_gpu = prepare_pending_routes(fallback_target_gpus)
+        used_fallback_routes = True
 
     if not pending_task_types_by_gpu:
         return candidates, skipped, failed
@@ -628,7 +649,11 @@ def process_model_for_candidates(
     except Exception as exc:
         return [], skipped, [{"repoId": model.repo_id, "reason": str(exc)}]
 
-    for target_gpu, task_types in pending_task_types_by_gpu:
+    def evaluate_pending_routes(pending_routes: list[tuple[str, list[str]]]) -> int:
+        before_count = len(candidates)
+        for target_gpu, task_types in pending_routes:
+            if len(candidates) - before_count >= MAX_ROUTES_PER_MODEL:
+                break
             best, preflight_reason = choose_candidate_for_gpu_detailed(
                 model=model,
                 inspection=inspection,
@@ -663,6 +688,17 @@ def process_model_for_candidates(
             if optimization.get("applied"):
                 record["frameworkConfigSource"] = "official_plus_learned_patch"
             candidates.append(record)
+        return len(candidates) - before_count
+
+    evaluate_pending_routes(pending_task_types_by_gpu)
+    # If preferred GPUs had routes but every one failed candidate preflight,
+    # give the remaining eligible GPUs one chance.  Once a
+    # preferred candidate exists, lower-ranked GPUs stay untouched for this
+    # model and remain available for later scans.
+    if not candidates and not used_fallback_routes and fallback_target_gpus:
+        fallback_pending = prepare_pending_routes(fallback_target_gpus)
+        if fallback_pending:
+            evaluate_pending_routes(fallback_pending)
 
     return candidates, skipped, failed
 
@@ -968,7 +1004,7 @@ def one_candidate_per_model(candidates: list[dict[str, Any]]) -> list[dict[str,
 def limit_routes_per_model(
     candidates: list[dict[str, Any]],
     *,
-    max_routes: int = 3,
+    max_routes: int = MAX_ROUTES_PER_MODEL,
 ) -> list[dict[str, Any]]:
     selected: list[dict[str, Any]] = []
     counts: Counter[str] = Counter()
@@ -1453,7 +1489,7 @@ def run_submission(
             config_optimizer=config_optimizer,
             allow_dynamic_tasks=not bool(getattr(args, "task_types", None)),
         )
-        stage_candidates = limit_routes_per_model(stage_candidates, max_routes=3)
+        stage_candidates = limit_routes_per_model(stage_candidates, max_routes=MAX_ROUTES_PER_MODEL)
         remaining_candidate_capacity = max(0, candidate_goal - current_candidate_models)
         stage_candidates = limit_candidate_models(
             stage_candidates,

modelhub_submmit_api/version.py

@@ -1 +1 @@
-AGENT_VERSION = "2026.09.04.4"
+AGENT_VERSION = "2026.09.18.1"

tests/test_submission_safety.py

@@ -68,6 +68,51 @@ class ExactGpuProcessedClient:
         return {"code": 0, "data": {"id": "should-not-submit"}}
 
 
+class AllGpuOfficialRegistry:
+    @staticmethod
+    def task_types_for(_client, *, model_address: str, model_last_modified: str | None, gpu: str) -> list[str]:
+        del model_address, model_last_modified, gpu
+        return ["text-generation"]
+
+
+class AllGpuVettedMarket:
+    @staticmethod
+    def has_framework_route(_task_type: str, _target_gpu: str) -> bool:
+        return True
+
+    @staticmethod
+    def ensure_framework_route(_client, _task_type: str, _target_gpu: str) -> None:
+        return None
+
+    @staticmethod
+    def selectable_frameworks(
+        *, task_type: str, target_gpu: str, incumbent_frameworks: list[str], inspection
+    ) -> list[str]:
+        del task_type, target_gpu, incumbent_frameworks, inspection
+        return ["vllm"]
+
+    @staticmethod
+    def official_config(
+        *, task_type: str, target_gpu: str, framework: str, gguf_filename: str | None = None
+    ) -> str:
+        del task_type, target_gpu, framework, gguf_filename
+        return "framework: vllm"
+
+    @staticmethod
+    def framework_metadata(_task_type: str, _target_gpu: str, _framework: str) -> dict:
+        return {"frameworkCombinedScore": 1.0, "frameworkOfficialConfigValid": True}
+
+    @staticmethod
+    def gpu_metadata(_target_gpu: str) -> dict:
+        return {}
+
+
+class SeventhGpuFallbackMarket(AllGpuVettedMarket):
+    @staticmethod
+    def has_framework_route(_task_type: str, target_gpu: str) -> bool:
+        return target_gpu == "gpu-7"
+
+
 class UniquenessRejectingClient:
     @staticmethod
     def add_task(_payload: dict) -> dict:
@@ -107,6 +152,50 @@ def candidate(target_gpu: str = "Vastai_va16") -> dict:
 
 
 class SubmissionSafetyTests(unittest.TestCase):
+    def test_official_routes_prefer_first_six_gpus(self) -> None:
+        target_gpus = [f"gpu-{index}" for index in range(1, 8)]
+        model = HFModelSummary(
+            repo_id="owner/model",
+            downloads=100,
+            last_modified=datetime(2026, 1, 1, tzinfo=timezone.utc),
+            pipeline_tag="text-generation",
+        )
+        candidates, skipped, failed = process_model_for_candidates(
+            model=model,
+            hf_discovery=SafeDiscovery(),  # type: ignore[arg-type]
+            modelhub_client=OtherGpuProcessedClient(),  # type: ignore[arg-type]
+            template_selector=TemplateSelector(),
+            target_gpus=target_gpus,
+            allowed_task_types=["text-generation"],
+            market_intelligence=AllGpuVettedMarket(),  # type: ignore[arg-type]
+            official_registry=AllGpuOfficialRegistry(),  # type: ignore[arg-type]
+        )
+        self.assertEqual(target_gpus[:6], [item["targetGpu"] for item in candidates])
+        self.assertEqual([], skipped)
+        self.assertEqual([], failed)
+
+    def test_official_routes_fall_back_after_preferred_six_are_unusable(self) -> None:
+        target_gpus = [f"gpu-{index}" for index in range(1, 8)]
+        model = HFModelSummary(
+            repo_id="owner/model",
+            downloads=100,
+            last_modified=datetime(2026, 1, 1, tzinfo=timezone.utc),
+            pipeline_tag="text-generation",
+        )
+        candidates, skipped, failed = process_model_for_candidates(
+            model=model,
+            hf_discovery=SafeDiscovery(),  # type: ignore[arg-type]
+            modelhub_client=OtherGpuProcessedClient(),  # type: ignore[arg-type]
+            template_selector=TemplateSelector(),
+            target_gpus=target_gpus,
+            allowed_task_types=["text-generation"],
+            market_intelligence=SeventhGpuFallbackMarket(),  # type: ignore[arg-type]
+            official_registry=AllGpuOfficialRegistry(),  # type: ignore[arg-type]
+        )
+        self.assertEqual(["gpu-7"], [item["targetGpu"] for item in candidates])
+        self.assertEqual(6, len(skipped))
+        self.assertEqual([], failed)
+
     def test_precheck_tracks_processed_gpus_without_blocking_other_gpus(self) -> None:
         payload = {
             "code": 0,