Retain latest schedules per semester, including Fall 2026 and Spring 2027

README.md

@@ -219,3 +219,6 @@ Generation models (pinned revisions):
 
 
 Prior official-outcome source documents and supplemental outcome history are retained with their original provenance. New summaries use Qwen/Qwen3.8-27B@1d4bf0f2ff6012fd82039f2fa52739d0dd7c60c0. Historical grade observations retain their original source timestamps.
+
+
+Schedule projections retain the latest completed course snapshot per semester as of the selected release. Each semester uses matching offerings, sections, teachers and meetings; a newer semester does not remove earlier semester schedules.

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public/schema.json

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