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Per Codex. Shared deploy/sync-static.sh used by both publish scripts: sync new hashed chunks first WITHOUT pruning old ones (grace window so in-flight/old clients keep chunks they still need), then other assets, then index.html, then service-worker.js last — so a new shell never appears before its chunks exist. Old immutable chunks pruned after 14 days to bound disk growth. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>