Initial vLLM agent strategy

app/scheduler/planner.py

@@ -0,0 +1,24 @@
+from app.domain.gpu import expand_gpu_aliases, parse_aliases
+from app.domain.model_type import engine_for_model
+from app.storage.repositories import Repository
+from app.scheduler.budget import Budget
+
+
+class Planner:
+    def __init__(self, repo: Repository, budget: Budget, default_aliases: list[str]):
+        self.repo = repo
+        self.budget = budget
+        self.default_aliases = default_aliases
+
+    def materialize_tasks(self) -> int:
+        created = 0
+        for candidate in self.repo.list_candidates():
+            if engine_for_model(candidate["model_id"]) != "vllm":
+                continue
+            aliases = parse_aliases(candidate["target_gpu_aliases"], self.default_aliases)
+            for gpu_alias, gpu_type in expand_gpu_aliases(aliases):
+                if not self.budget.can_create_task():
+                    return created
+                if self.repo.insert_task_if_absent(candidate["model_id"], gpu_alias, gpu_type, candidate["priority"]):
+                    created += 1
+        return created