bext-plugin-wasm

WASM plugin runtime for bext — wasmtime-based sandboxed host for untrusted plugin code.

Part of the bext stack.

[dependencies]
bext-plugin-wasm = "0.2"

What this crate is

bext-plugin-wasm is one of three sandbox hosts for bext-plugin-api. It runs plugins compiled to WebAssembly inside a wasmtime sandbox, with fuel budgets for CPU limits, memory caps, and a set of curated host functions.

Features

• wasmtime runtime, memory-safe, no JIT escape.
• Fuel budgets — bound per-request CPU time in instruction counts.
• Host functions — KV store, durable queue, HTTP fetch (behind feature flag), signing, hashing.
• Module caching — compile once per plugin, reuse across requests.

Feature flags

[dependencies]
bext-plugin-wasm = { version = "0.2", features = ["wasmtime-runtime", "http-client"] }

• wasmtime-runtime — enable the full wasmtime engine (default off, because wasmtime is a heavy dep)
• http-client — enable the http-fetch host function (ureq-based)

License

MIT.

See also

• github.com/bext-stack/bext — the bext meta repo
• Full ecosystem — all bext crates at a glance