Story 5

src/router.py

@@ -0,0 +1,26 @@
+"""Threshold-based routing of video-level confidence to MATCH / REVIEW / SKIP."""
+
+import logging
+
+logger = logging.getLogger(__name__)
+
+MATCH  = "MATCH"
+REVIEW = "REVIEW"
+SKIP   = "SKIP"
+
+
+def route(
+    confidence: float,
+    t_high: float = 0.75,
+    t_low: float = 0.45,
+) -> str:
+    """Return the routing decision for a video-level confidence score."""
+    if confidence >= t_high:
+        decision = MATCH
+    elif confidence >= t_low:
+        decision = REVIEW
+    else:
+        decision = SKIP
+
+    logger.debug("route: C=%.4f t_high=%.2f t_low=%.2f → %s", confidence, t_high, t_low, decision)
+    return decision