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@as-harness/js

v0.6.0

Published

4 days ago

Portable JavaScript host for the shared runtime contract.

0High
0Medium
0Low

harness/js

Portable JavaScript host for the shared runtime contract.

Purpose

no native addon
no per-platform binary artifact
easiest starting point for ABI validation and implementation reference
published as @as-harness/js and used directly by @as-harness/cli

Surface

createHarness(bytes) returns a shared Harness instance with:

discover / run stage/replay by NodeIndex
start() orchestration through shared deterministic planning plus same-machine worker slots
event callbacks and report-tree aggregation
coverage collection merge/snapshot reset
explicit close()

Responsibilities

validate and instantiate Wasm
decode write_event(...) payloads
trap observation via trampoline boundary
trace(...) interception → log events
structured debug payload decoding for rewritten abort(...) / trace(...) events
emit merged coverage snapshots when guest declares coverage

Testing and Notes

shared host smoke suites are shared with wazero and wasmtime.
package-local extra checks focus on JS-specific start() scheduling and report-shape behavior.

cd harness/js
npm test

Related Docs