Adopt SpiderMonkey official test harness

[brandonpayton]

Summary

This opens the single epic-level PR for kad-165 from integration/kad-165-spidermonkey-tests to main.

The branch adopts the useful SpiderMonkey official JS-shell harness work from external PR #1 and finishes the Kandelo-specific validation and classification work around it. The supported product gate for this PR is Mozilla js/src/tests jstests on both Kandelo hosts.

PR #1 provenance and adoption boundary

Source PR: brandonpayton#1

Reviewed source state:

• External PR title: feat: add SpiderMonkey official test harness
• Head ref: feat/spidermonkey-official-tests
• Head commit: 9147efd908bddb87afd63d7b6c1e0263f054b985
• Local review ref recorded by kad-165.1: pr1/feat-spidermonkey-official-tests

Adopted from PR #1:

• Official SpiderMonkey shell wrapper shape for Mozilla jstests.py / jit_test.py.
• Persistent Node and browser JS-shell bridge/client/server scripts.
• Exhaustive resumable chunk runner with inventory.tsv, summary.tsv, per-chunk logs, resume support, and result directories.
• Firefox/SpiderMonkey source helper pinned through the package manifest.
• Browser-only SpiderMonkey test page and VFS image builder for Playwright-driven harness runs.
• Narrow VFS exception for the intentionally non-fork-instrumented /usr/bin/js artifact.

Changed or reworked for current main:

• Reconciled browser demo input selection with the current Vite/browser-demo structure.
• Implemented Node stdout/stderr PID attribution without changing browser behavior.
• Added browser bridge retry/recycle behavior for execution-context loss, guest timeouts, and browser memory pressure.
• Added exact known-skip/resource classification layers for the final supported jstest scope.
• Rewrote docs/spidermonkey-official-test-report.md from current Kandelo evidence rather than copying the PR feat: centralized multi-process kernel #1 snapshot.

Intentionally not adopted from PR #1:

• No global SDK --max-memory=2147483648 default change.
• No broad kernel memory.rs brk-limit semantic change.
• No SpiderMonkey package patch import or package revision bump.
• No mozglue interposer or wasm32 64-bit atomics patch import.

Those broader runtime/package changes need separate diagnosis before they can be treated as product fixes.

Supported coverage and hard counts

Full details are committed in docs/spidermonkey-official-test-report.md.

Host	Suite	Epic status	Final evidence
Node	js/src/tests jstests	Completed; residual unexpected rows classified	738 selected chunks, 50,503 pass, 1,932 known skip, 237 historical unexpected rows. The 237 rows are classified as 61 wasm32 BigInt Atomics limitations, 158 non-Atomics timeout/resource rows, 2 recursion stack/resource rows, and 16 mozglue timezone/env interposer crashes.
Browser	js/src/tests jstests	Completed; supported residual failure count is 0 after known-skip fixes	Final long tail: 11,670 pass, 418 known skip, 4 browser-only staging outliers. Superseding tail-skipfix rerun: 464 pass, 49 known skip, 0 unexpected.
Node	js/src/jit-test/tests	Skipped/out of scope for this epic	Exploratory artifact preserved: 70 chunks, 8,634 upstream files, 10,371 pass, 45,386 unexpected under --jitflags=all; not a product gate while the package is built with --disable-jit.
Browser	js/src/jit-test/tests	Skipped/out of scope for this epic	Inventory scope preserved at 8,634 upstream files. Partial continuation evidence recorded 108 pass and 180 fail before the scope correction interrupted the run; not a product gate while the package is built with --disable-jit.

WPT jsshell is out of scope for this epic per kad-165.9. This PR does not claim WPT validation.

Artifact paths

Authoritative Node jstest segments:

/Users/brandon/gt/kandelo/polecats/toast/kandelo/test-results/spidermonkey-official/kad-165.4-node-jstests-*

Authoritative browser jstest tail and superseding tail-skipfix rerun:

/Users/brandon/gt/kandelo/polecats/rictus/kandelo/test-results/spidermonkey-official/kad-165.7-browser-jstests-resume11-20260614T131756Z
/Users/brandon/gt/kandelo/polecats/rictus/kandelo/test-results/spidermonkey-official/kad-165.7-browser-jstests-tail-skipfix-20260614T192700Z

Preserved exploratory Node jit-test artifact:

test-runs/spidermonkey-official-node-jit-kad-165.5/

Preserved exploratory browser jit-test artifact:

/Users/brandon/gt/kandelo/polecats/morsov/kandelo/test-results/spidermonkey-official/kad-165.8-browser-jit-tests-gc4-continuation-20260614T131641Z

Known blockers and follow-up beads

Residual work is tracked rather than hidden:

• kad-crh: Node SpiderMonkey mozglue timezone/env interposer crashes in Date/Intl jstests.
• kad-165.18 / kad-165.12: wasm32 BigInt Atomics limitation and browser known-skip coverage.
• kad-165.19 / kad-165.21: Node jstest timeout/resource cluster classification and exact-match expected-resource layer.
• kad-165.20 / kad-6wx: SpiderMonkey recursion and browser stack/resource-envelope follow-ups.
• kad-2tp: browser default-locale follow-up.

Verification

Recorded by kad-165.14 on the rebased integration branch:

• cargo test -p kandelo --target aarch64-apple-darwin --lib passed: 882 passed, 0 failed.
• cd host && npm run build && npx vitest run passed after rebuilding stale ignored host/dist: 79 files passed, 19 skipped; 668 tests passed, 58 skipped.
• scripts/run-libc-tests.sh passed: 302 PASS, 0 FAIL, 20 XFAIL, 2 FLAKY, 0 TIMEOUT, total 324.
• scripts/run-posix-tests.sh passed: 174 PASS, 0 FAIL, 3 XFAIL, 2 SKIP, total 179.
• scripts/dev-shell.sh bash scripts/check-abi-version.sh passed with snapshot/header/TS bindings in sync.

This PR is intentionally opened as the one final epic PR; it does not directly land to main.

[github-actions]

Phase B-1 matrix build status — pr-697-staging

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

Package	Arch	Status	Sha
libcurl	wasm32	built	129824e6
libcxx	wasm32	built	17d026a9
libcxx	wasm64	built	413d38cf
libpng	wasm32	built	deab09dd
libxml2	wasm32	built	e29b87b9
libxml2	wasm64	built	2ca44317
openssl	wasm32	built	a7d4a86e
openssl	wasm64	built	5982c611
sqlite	wasm32	built	f937eb28
sqlite	wasm64	built	f4756963
zlib	wasm32	built	d5185b1e
zlib	wasm64	built	3a00a158
bc	wasm32	built	c42352a7
bzip2	wasm32	built	0a0434c8
coreutils	wasm32	built	0f84c7e1
curl	wasm32	built	08a54d6d
dash	wasm32	built	69f1b1b2
diffutils	wasm32	built	b360a34a
dinit	wasm32	built	7ef70141
fbdoom	wasm32	built	c8920ab5
file	wasm32	built	0316255d
findutils	wasm32	built	4d895a7f
gawk	wasm32	built	1cafe372
git	wasm32	built	edd2fc0c
grep	wasm32	built	ca470f11
gzip	wasm32	built	ccb9c568
kandelo-sdk	wasm32	built	ede3141f
kernel	wasm32	built	ffb12c6a
less	wasm32	built	d98bc30d
lsof	wasm32	built	59f73b7a
m4	wasm32	built	94ccf14a
make	wasm32	built	d0d024f9
mariadb	wasm32	built	913779d2
mariadb	wasm64	built	86471909
msmtpd	wasm32	built	82f06d73
nano	wasm32	built	177d5236
ncurses	wasm32	built	0aa74d54
netcat	wasm32	built	73cdeac7
nginx	wasm32	built	8666e54f
php	wasm32	built	409411e2
posix-utils-lite	wasm32	built	1beff1db
sed	wasm32	built	3ba2950d
spidermonkey	wasm32	built	6122cea3
tar	wasm32	built	c3f115f6
tcl	wasm32	built	2915911a
unzip	wasm32	built	27113bf0
userspace	wasm32	built	e50c9ad6
vim	wasm32	built	b9fc24dd
wget	wasm32	built	440e6b3e
xz	wasm32	built	0d7a38a6
zip	wasm32	built	e98930e6
zstd	wasm32	built	1c9f9548
bash	wasm32	built	da89d506
mariadb-test	wasm32	built	d52d9e8c
mariadb-vfs	wasm32	built	9dcf48e7
mariadb-vfs	wasm64	built	15b92c82
nethack	wasm32	built	0884092a
node	wasm32	built	6f9abe33
spidermonkey-node	wasm32	built	9e59d17f
vim-browser-bundle	wasm32	built	6b1dba8d
nethack-browser-bundle	wasm32	built	149ca534
rootfs	wasm32	built	54f5d679
shell	wasm32	built	e2b9918e
lamp	wasm32	built	d9c9fa46
node-vfs	wasm32	built	fbd7e78c
wordpress	wasm32	built	6ce03e2f

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