The browser runtime implementation of Http.get and Http.post (#57) uses synchronous XMLHttpRequest, which is deprecated and:

• Blocks the main thread
• Is unavailable in service workers and shared workers
• May be removed from browsers in the future
• Triggers deprecation warnings in browser consoles

Impact

HTTP requests work on the main browser thread but not in worker contexts. The browser console shows deprecation warnings.

Possible fix

Options:

1. Use Atomics.wait + SharedArrayBuffer with a worker to bridge async fetch to synchronous WASM (complex)
2. Wait for WASI 0.2/0.3 (WASI 0.2 compliance #237) which provides native async I/O
3. Accept the limitation until Vera supports async WASM execution

Related: #57 (Http effect), #237 (WASI)