StackBlitz announced a major core update to Bolt.new. The new WebContainer Differential Sync engine streams targeted file patch deltas directly into the in-browser sandbox, eliminating full container restarts and reducing fullstack hot-reload cycles to 120ms with instant runtime error capture.

Key Takeaways

  • ✓Differential syncing avoids cold container reboots during multi-file code generation.
  • ✓Fullstack hot-reload latency drops to 120ms for instant feedback loops.
  • ✓Automatically captures client/server runtime errors and dispatches silent fixes.
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