Add official Node.js core module test harness

[brandonpayton]

Summary

This PR adds an official Node.js core JavaScript test harness for Kandelo's
SpiderMonkey-backed Node-compatible runtime. The harness is pinned to upstream
nodejs/node v22.0.0 at peeled commit
12fb157f79da8c094a54bc99370994941c28c235 and can run the full upstream
test/parallel/test-*.js suite on both Kandelo hosts.

The branch includes:

• Scope documentation for the official-test adoption boundary.
• scripts/run-node-core-official-tests.sh and
  scripts/node-core-official-runner.ts.
• Full-suite discovery of upstream test/parallel/test-*.js; the checked-in
  manifest is now only for smoke, targeted reruns, and explicit SKIP/XFAIL
  support-boundary entries.
• Browser test-runner support for serving the upstream source fixture tree,
  generated prelude, and runtime wasm through a same-origin Vite route.
• Recorded Node-host and browser-host result artifacts under
  test-runs/node-core-official-*.
• Runtime compatibility fixes and explicit support-boundary classifications
  discovered while expanding from the original smoke manifest to the full suite.

Validation Status

Pinned source:

• Repo: https://github.com/nodejs/node.git
• Tag: v22.0.0
• Tag object: ec49bec48284ab642db1d109d917c6ae3b695c13
• Peeled commit: 12fb157f79da8c094a54bc99370994941c28c235
• Suite: upstream test/parallel/test-*.js
• Full-suite selected count: 3382

Authoritative full-suite correction run from kad-nct.17:

Host	Artifact	Selected	PASS	FAIL	SKIP	Status
Node	test-runs/node-core-official-node-full-kad-nct17/	3382	7	3375	0	Authoritative full run
Browser	test-runs/node-core-official-browser-full-kad-nct17-host-timeout/	3382	3382 reported	0 reported	0 reported	Not authoritative; sentinel exposed false PASS handling

Browser authority check from kad-nct.17:

Host	Artifact	Selected	PASS	FAIL	Result
Node sentinel	test-runs/node-core-official-node-sentinel-kad-nct17/	1	0	1	Correctly failed a deliberate throwing test
Browser sentinel	test-runs/node-core-official-browser-sentinel-kad-nct17/	1	1	0	Incorrectly reported PASS for the same throwing test

The browser false-PASS issue was tracked by kad-nct.18 and later fixed, but
this PR body does not claim an authoritative browser full-suite PASS/FAIL/SKIP
count until a post-fix browser full-suite rerun is recorded.

Latest committed Node-host full-suite rerun from kad-nct.48:

Host	Artifact	Selected	PASS	FAIL	SKIP	Status
Node	test-runs/node-core-official-node-full-kad-nct48-rerun/	3382	1253	2126	3	Latest committed Node full-suite hard count; not final after all later follow-up MRs

kad-nct.48 reran the Node-host full suite after the first wave of semantic
fixes had landed, then split the remaining tail into narrower follow-up beads.
It supersedes the original 10-test smoke-manifest numbers for PR status, but it
is still not a final green run.

The original 10-test manifest artifacts remain useful smoke history only:

• test-runs/node-core-official-node-final/
• test-runs/node-core-official-browser-final/

Those selected-manifest counts must not be used as this epic's pass/fail/skip
status.

Failure Tracking

The first authoritative Node-host full run (kad-nct.17) grouped failures into
tracked follow-up beads:

Group	Count	Tracking
Node test/common unexpected global leak assertion	1455 primary / 3354 contains-pattern	kad-nct.11
Missing module/API surface	457 primary	kad-nct.21
TypeError semantic mismatches	447 primary	kad-nct.23
Assertion semantic mismatches	391 primary	kad-nct.23, plus selected narrow bugs kad-nct.12-kad-nct.15
http.createServer missing	269 primary	kad-nct.20
Shared tmpdir/process identity collision	194 primary	kad-nct.19
cluster.fork missing	48 primary	kad-nct.22
child_process.fork / cp.fork missing	33 primary	kad-nct.22
Timeout artifacts	13 results / 12 primary	kad-nct.24

The later kad-nct.48 rerun split the remaining one-off tail into:

• kad-nct.61: self-exec CLI option and exit status
• kad-nct.62: node:test runner behavior
• kad-nct.63: bootstrap and preload semantics
• kad-nct.64: test/common helper diagnostics
• kad-nct.65: --disable-proto delete/throw modes
• kad-nct.66: dotenv / --env-file / NODE_OPTIONS
• kad-nct.67: os tmpdir, homedir, priority, and availableParallelism()
• kad-nct.68: punycode API surface
• kad-nct.69: source-map API surface
• kad-nct.70: querystring residuals
• kad-nct.71: V8-only SharedArray conveyor support boundary
• kad-nct.72: residual HTTP IncomingMessage / OutgoingMessage semantics

See docs/plans/2026-06-13-node-core-full-suite-kad-nct17.md,
docs/plans/2026-06-14-node-core-semantic-mismatch-triage-kad-nct23.md,
docs/plans/2026-06-14-node-core-timeout-triage-kad-nct24.md, and
docs/plans/2026-06-14-node-core-tail-triage-kad-nct48.md for the exact
commands, artifacts, and triage detail.

Unsupported And Excluded Scope

The full-suite harness discovers all upstream test/parallel/test-*.js files by
default. Exclusions are not made by narrowing selection; they are represented as
explicit manifest SKIP or XFAIL entries only after triage.

Current unsupported categories include:

• Native addons, Node-API, C++ tests, .node loads, and process.dlopen().
• V8-only internals, inspector/debugger/profiling hooks, snapshots, coverage,
  V8-specific stack/format details, and experimental V8-only flags such as
  --harmony-struct / SharedArray conveyor behavior.
• Libuv/native handle internals, exact TTY/pipe handle behavior, and
  host-specific signal/job-control expectations unless a later bead expands the
  supported behavior.
• External network access, host filesystem assumptions outside the mounted VFS,
  and Python tools/test.py orchestration.
• Private Node internals such as internal/test/binding unless represented as
  explicit support-boundary skips.

Current Review Note

This PR is not claiming the full Node.js core JavaScript suite is passing. It
adds the harness, records the full-suite attempts, and tracks the remaining
kernel/platform/runtime work with concrete beads. The hard numbers above replace
the obsolete selected 10-test smoke status that was present before the epic scope
correction.

[github-actions]

Phase B-1 matrix build status — pr-693-staging

ABI v15. 66 built, 0 failed, 66 total.

Package	Arch	Status	Sha
libcurl	wasm32	built	0dc752cd
libcxx	wasm32	built	ba88376d
libcxx	wasm64	built	eef98246
libpng	wasm32	built	300aeaae
libxml2	wasm32	built	d9edfdfc
libxml2	wasm64	built	f33ac92c
openssl	wasm32	built	0b87d133
openssl	wasm64	built	92a2f35f
sqlite	wasm32	built	092822d5
sqlite	wasm64	built	93719642
zlib	wasm32	built	ad546e23
zlib	wasm64	built	f6c287f7
bc	wasm32	built	e43a76d5
bzip2	wasm32	built	3f1adcf1
coreutils	wasm32	built	0cbae556
curl	wasm32	built	4f7327d2
dash	wasm32	built	65e39bf3
diffutils	wasm32	built	6c59fc70
dinit	wasm32	built	afe9bac1
fbdoom	wasm32	built	19779c73
file	wasm32	built	6f22edb6
findutils	wasm32	built	62ddd144
gawk	wasm32	built	42462259
git	wasm32	built	83f4bbe7
grep	wasm32	built	2c663f51
gzip	wasm32	built	0ee50c18
kandelo-sdk	wasm32	built	4629b05b
kernel	wasm32	built	12626ee2
less	wasm32	built	293fbae1
lsof	wasm32	built	e8f4435b
m4	wasm32	built	fdbfa05c
make	wasm32	built	3be6a8d2
mariadb	wasm32	built	892b315d
mariadb	wasm64	built	7fbc6075
msmtpd	wasm32	built	f9952440
nano	wasm32	built	98c4c429
ncurses	wasm32	built	0329c51d
netcat	wasm32	built	71425a0e
nginx	wasm32	built	5bbf80bc
php	wasm32	built	454ac774
posix-utils-lite	wasm32	built	b39226ea
sed	wasm32	built	66417fe9
spidermonkey	wasm32	built	0da8b996
tar	wasm32	built	e5e26250
tcl	wasm32	built	b48f372a
unzip	wasm32	built	ae0fbecc
userspace	wasm32	built	f1ea1901
vim	wasm32	built	2415d302
wget	wasm32	built	d72b84ef
xz	wasm32	built	535357d4
zip	wasm32	built	d3aff965
zstd	wasm32	built	5272fa6e
bash	wasm32	built	a8ab2cc6
mariadb-test	wasm32	built	163a4d4f
mariadb-vfs	wasm32	built	31398107
mariadb-vfs	wasm64	built	596c59a1
nethack	wasm32	built	0b797814
node	wasm32	built	31a9ced2
spidermonkey-node	wasm32	built	2678fd04
vim-browser-bundle	wasm32	built	dc90bfc0
nethack-browser-bundle	wasm32	built	45c13d37
rootfs	wasm32	built	2cffd99a
shell	wasm32	built	3910288d
lamp	wasm32	built	70772eea
node-vfs	wasm32	built	83b8330b
wordpress	wasm32	built	7b414f4e

_{Auto-generated; replaced on each push. Raw data in the publish-status workflow artifact.}