Async Without Await in Sigil

Sigil keeps one async-capable runtime model without making ordinary expression structure a concurrency surface.

That means:

• FFI calls and internal Sigil functions compose through one promise-shaped

model

• users do not write await just to keep async code moving
• explicit widening belongs to named concurrent regions such as

concurrent urlAudit@5{...}

That split keeps async plumbing uniform while making batching policy visible in source.

See:

• /articles/named-concurrent-regions
• /docs/async

The language docs and specs are the source of truth:

• language/docs/ASYNC.md
• language/docs/syntax-reference.md
• language/spec/semantics.md