node:worker_threads: expose Worker stdio streams and option state #3330

Summary

new Worker(filename, options) should honor Node-observable Worker option surfaces such as stdout, stderr, stdin, env, resourceLimits, name, SHARE_ENV, and trackUnmanagedFds. Perry currently has no Node-compatible Worker constructor, so these stream and option-state rows are untracked outside the broad worker execution issue.

Node Behavior

A Node v25.9.0 probe shows the stream and option shape:

const { Worker, SHARE_ENV } = require("node:worker_threads");
console.log(typeof SHARE_ENV, String(SHARE_ENV)); // symbol Symbol(nodejs.worker_threads.SHARE_ENV)

const worker = new Worker(`
  const { parentPort } = require("node:worker_threads");
  process.stdout.write("out-line\\n");
  process.stderr.write("err-line\\n");
  parentPort.postMessage({ envProbe: process.env.PERRY_WORKER_ENV_PROBE || null });
`, {
  eval: true,
  stdout: true,
  stderr: true,
  env: { PERRY_WORKER_ENV_PROBE: "child" },
  resourceLimits: { maxOldGenerationSizeMb: 16 },
  name: "stdio-probe",
});

console.log(!!worker.stdout, !!worker.stderr, worker.stdin === null);
console.log(worker.threadName, Object.keys(worker.resourceLimits).sort());

Node exposes readable stdout/stderr streams when requested, leaves stdin null unless requested, preserves threadName, exposes resource-limit keys, and applies the supplied environment to worker code.

Perry Behavior

docs/runtime-parity-gaps.md lists Worker stdin, stdout, stderr, resourceLimits, threadName, SHARE_ENV, and option rows as missing. #3156 tracks the basic Worker file execution and parentPort lifecycle but does not explicitly cover stdio stream plumbing, SHARE_ENV, or advanced option state. Source search found environment-data and synthetic parentPort shims, plus recently merged main-thread isMainThread / threadId / resourceLimits shape support, but no Worker constructor option implementation. Exact issue/PR searches for worker.stdin, worker.stdout, worker.stderr, trackUnmanagedFds, and worker_threads resource options found no focused tracker beyond #2507/#3156.

Suggested PR Cut

Batch this with related issues in:
node:worker_threads: Worker execution and option surface parity cut

Good batch candidates:

• node:worker_threads: worker and messaging parity cut #2507
• node:worker_threads: execute Worker files with parentPort messaging #3156
• node:worker_threads: expose Worker diagnostics and profiling APIs #3329 if the Worker object shape and lifecycle handles are being introduced together

Do not batch with:

• unrelated modules
• broad subsystem rewrites
• fixes needing different test harnesses
• MessagePort / BroadcastChannel delivery unless needed for Worker message basics
• Web Locks APIs
• Perry-native perry/thread API changes unless required as implementation plumbing

Acceptance

• parity/regression test starts a Worker with stdout: true and stderr: true and observes readable stream output matching Node for a deterministic fixture
• Worker option state for env, name / threadName, resourceLimits, stdin, and SHARE_ENV matches Node-observable behavior for covered cases
• implementation matches Node observable behavior
• related known-failure/docs/manifest entries updated if touched