Fix submitted-strategy dedupe file handling + expand demo submission flow

api/main.py

@@ -178,8 +178,18 @@ def submit_strategy(req: StrategySubmit, db: Session = Depends(get_db)):
     ).scalar_one_or_none()
 
     if existing:
-        # Remove the duplicate file we just wrote
-        os.remove(strategy_path)
+        # Keep the canonical file referenced by the existing StrategyVersion.
+        # Only remove the just-written duplicate when it points elsewhere.
+        if os.path.abspath(strategy_path) != os.path.abspath(existing.strategy_path):
+            if os.path.exists(strategy_path):
+                os.remove(strategy_path)
+
+        # Repair stale records if the canonical file was removed previously.
+        if not os.path.exists(existing.strategy_path):
+            ensure_strategies_dir()
+            with open(existing.strategy_path, "w", encoding="utf-8") as f:
+                f.write(req.code)
+
         return StrategyCreateResponse(
             strategy_id=existing.strategy_id,
             strategy_version_id=existing.id,

scripts/demo.sh

@@ -53,13 +53,35 @@ STRATEGY_RESPONSE=$(curl -s -X POST http://127.0.0.1:8001/strategies \
   -H 'Content-Type: application/json' \
   -d "{\"strategy_path\":\"$STRATEGY_PATH\"}")
 
-echo "Strategy response: $STRATEGY_RESPONSE"
+echo "Strategy response (path): $STRATEGY_RESPONSE"
 
 RUN_RESPONSE=$(curl -s -X POST http://127.0.0.1:8001/runs \
   -H 'Content-Type: application/json' \
   -d "{\"strategy_path\":\"$STRATEGY_PATH\"}")
 
-echo "Run response: $RUN_RESPONSE"
+echo "Run response (path): $RUN_RESPONSE"
+
+SUBMIT_PAYLOAD=$("$ROOT_DIR/.venv312/bin/python" - <<'PY'
+import json
+from pathlib import Path
+code = Path("examples/strategies/buy_and_hold.py").read_text(encoding="utf-8")
+print(json.dumps({"name": "demo_submitted_strategy", "code": code}))
+PY
+)
+
+SUBMIT_RESPONSE=$(curl -s -X POST http://127.0.0.1:8001/strategies/submit \
+  -H 'Content-Type: application/json' \
+  -d "$SUBMIT_PAYLOAD")
+
+echo "Strategy response (submit): $SUBMIT_RESPONSE"
+
+SUBMIT_VERSION_ID=$("$ROOT_DIR/.venv312/bin/python" -c 'import json,sys; print(json.loads(sys.argv[1])["strategy_version_id"])' "$SUBMIT_RESPONSE")
+
+RUN_SUBMIT_RESPONSE=$(curl -s -X POST http://127.0.0.1:8001/runs \
+  -H 'Content-Type: application/json' \
+  -d "{\"strategy_version_id\":$SUBMIT_VERSION_ID}")
+
+echo "Run response (submitted code): $RUN_SUBMIT_RESPONSE"
 
 LEADERBOARD=$(curl -s "http://127.0.0.1:8001/leaderboard?dataset_version=$DATASET_VERSION")
 echo "Leaderboard: $LEADERBOARD"