Changelog

2026-09-12

Added xfetch-guest-api: host-call bridge for WebAssembly core-module guests (host_call, http_request, exec, log, protocol_version) plus the xfetch_alloc/xfetch_free exports the host needs.
Added wit/xfetch-runtime.wit: the component-model contract with plugin, effect and extension worlds and the typed fetch/exec/log/protocol-version host interface.
with_timeout is now wasm-compatible: on wasm32 the task runs inline (no worker threads) and the host enforces the deadline through wasmtime epochs.

Added with_timeout(budget, task) to xfetch-plugin-api and xfetch-extension-api. Plugins and extensions declare their own runtime budget in code; the task runs on a worker thread and Err(TimedOut) is returned when the budget elapses, so a hung plugin/extension can never hang xfetch.