Web mode boot still fails on Node v22 after #1864 fix — ERR_UNSUPPORTED_NODE_MODULES_TYPE_STRIPPING #2333

Problem

gsd --web fails to start on Node.js v22.13.0 with the same ERR_UNSUPPORTED_NODE_MODULES_TYPE_STRIPPING error that #1864 was meant to fix. The fix in v2.42.0 switches from --experimental-strip-types to --experimental-transform-types when the package root is under node_modules/, but Node 22 blocks both flags for files under node_modules/.

The boot readiness check returns HTTP 500 three times, then aborts (the bug 2/3 fixes from #1864 work correctly — fast fail and error body are present).

Root Cause

resolveTypeStrippingFlag() doesn't help on Node 22

The fix in #1864 added resolveTypeStrippingFlag() (chunk 34431 in the standalone bundle):

function d(a) {
  return a.replace(/\\/g, "/").includes("/node_modules/") && function () {
    let [a, b] = process.versions.node.split(".").map(Number);
    return a > 22 || 22 === a && b >= 7;
  }() ? "--experimental-transform-types" : "--experimental-strip-types";
}

On Node 22.13.0, this correctly returns --experimental-transform-types. However, Node 22 enforces ERR_UNSUPPORTED_NODE_MODULES_TYPE_STRIPPING for both flags — the restriction applies to all native TypeScript handling for files under node_modules/, not just strip-types.

Verified directly:

$ node --version
v22.13.0

$ node --experimental-transform-types -e \
  "require('/path/to/node_modules/gsd-pi/src/resources/extensions/gsd/auto-dashboard.ts')"

Error [ERR_UNSUPPORTED_NODE_MODULES_TYPE_STRIPPING]: Stripping types is currently
unsupported for files under node_modules, for
"/Users/navin/.proto/tools/node/globals/lib/node_modules/gsd-pi/src/resources/extensions/gsd/auto-dashboard.ts"

The subprocess in module 74900 (chunks/229.js) spawns:

execFile(process.execPath, [
  "--import", resolve_ts_mjs_url,
  resolveTypeStrippingFlag(packageRoot),  // ← "--experimental-transform-types" on 22.13
  "--input-type=module",
  "--eval", script_that_imports_auto_ts
], ...)

The --import resolve-ts.mjs registers a dist-redirect.mjs loader hook, but this doesn't bypass Node's pre-import type stripping check.

This restriction was only lifted in Node 23.6+

The ERR_UNSUPPORTED_NODE_MODULES_TYPE_STRIPPING check for --experimental-transform-types was removed in nodejs/node#56785 (landed in Node 23.6). Node 22 LTS still enforces it for both flags.

Expected Behavior

The fix from #1864 should work on Node 22 LTS (current LTS line). Options:

1. Pre-compile src/resources/extensions/gsd/*.ts to JS at package build time, so subprocess workers import .js files that bypass the restriction entirely.
2. Copy .ts files to a temp dir outside node_modules/ before spawning subprocesses.
3. Document Node 23.6+ / 24 as the minimum for web mode if supporting Node 22 isn't feasible.

Environment

• GSD version: 2.43.0 (includes fix: resolve Node v24 web boot failure (ERR_UNSUPPORTED_NODE_MODULES_TYPE_STRIPPING) #1864 fix from v2.42.0)
• Node.js: v22.13.0 (current LTS)
• Platform: macOS Darwin 24.6.0 (global npm install via proto)
• Install path: /Users/navin/.proto/tools/node/globals/lib/node_modules/gsd-pi/

Reproduction

# Node 22 LTS
node -v  # v22.13.0

# Install or update to latest
npm update -g gsd-pi  # 2.43.0

# Launch web mode
cd /path/to/any/project
gsd --web
# → boot-ready:boot route returned 3 consecutive 5xx responses (last: 500)

Forensic Evidence

• resolveTypeStrippingFlag() correctly detects node_modules/ path and returns --experimental-transform-types
• Node 22.13.0 throws ERR_UNSUPPORTED_NODE_MODULES_TYPE_STRIPPING for both --experimental-strip-types and --experimental-transform-types
• The node-pty package bundled in the standalone also ships raw .ts source files in src/, though this is secondary to the auto.ts subprocess issue
• Bugs 2 and 3 from Web mode boot fails with HTTP 500 on Node v24 — ERR_UNSUPPORTED_NODE_MODULES_TYPE_STRIPPING #1849 are confirmed fixed — fast fail after 3 consecutive 5xx and error body are present

Refs: #1849, #1856, #1864