Fix HF Space blank screen and state endpoint bug

- Add root GET / endpoint to server.py so HF Space returns 200 instead of 404
- Remove invalid step_count field from FactoryState construction in env.py
- Expand openenv.yaml with version, task descriptions, action/observation space metadata

factory_env/env.py

@@ -112,7 +112,6 @@ class FactoryEnv(Environment[FactoryAction, FactoryObservation, FactoryState]):
             time=self.time,
             task=self.task,
             late_jobs=self.late_jobs,
-            step_count=self.time,
         )
 
     def _make_obs(self, reward, done: bool) -> FactoryObservation:

openenv.yaml

@@ -1,9 +1,42 @@
 name: factory_env
-description: Smart factory scheduling environment
+version: "1.0.0"
+description: Smart factory scheduling environment — assign jobs to machines, handle breakdowns, maximise throughput within deadlines.
+
+entry_point: factory_env.env:FactoryEnv
 
 tasks:
- - name: easy
- - name: medium
- - name: hard
+  - name: easy
+    description: 2 machines, 3 jobs, no failures, 20 steps
+  - name: medium
+    description: 4 machines, 7 jobs, 8% failure rate, 30 steps
+  - name: hard
+    description: 6 machines, 12 jobs, 15% failure rate, 40 steps
 
-entry_point: factory_env.env:FactoryEnv
+action_space:
+  type: text
+  description: "assign_job <job_id> <machine_id> | repair <machine_id> | wait"
+
+observation_space:
+  type: object
+  fields:
+    - name: machines
+      type: list
+      description: List of machines with id, status (idle/busy/broken), current_job
+    - name: pending_jobs
+      type: list
+      description: List of jobs with id, remaining_time, deadline, priority
+    - name: completed_jobs
+      type: list
+      description: Jobs completed this episode
+    - name: time
+      type: int
+      description: Current timestep
+    - name: max_steps
+      type: int
+      description: Episode length
+    - name: done
+      type: bool
+      description: Whether the episode has ended
+    - name: reward
+      type: float
+      description: Reward from the last action

server.py

@@ -1,8 +1,9 @@
 """
 OpenEnv HTTP Server — Smart Factory Scheduling
-Routes: GET /health  POST /reset  POST /step  GET /state  GET /schema
+Routes: GET /  GET /health  POST /reset  POST /step  GET /state  GET /schema
 """
 import os
+from fastapi.responses import JSONResponse
 from openenv.core import create_app
 from factory_env.env import FactoryEnv
 from factory_env.models import FactoryAction, FactoryObservation
@@ -16,6 +17,17 @@ app = create_app(
     env_name="factory_env",
 )
 
+
+@app.get("/")
+def root():
+    return JSONResponse({
+        "name": "factory_env",
+        "description": "Smart Factory Scheduling — OpenEnv RL Environment",
+        "tasks": ["easy", "medium", "hard"],
+        "endpoints": ["/health", "/reset", "/step", "/state", "/schema", "/docs"],
+    })
+
+
 if __name__ == "__main__":
     import uvicorn
     uvicorn.run(app, host="0.0.0.0", port=int(os.getenv("PORT", 7860)))