DEP0190 deprecation warning at session start on Windows (Node 22+)

Title: DEP0190 deprecation warning at session start on Windows (Node 22+)

Repo: vercel/vercel-plugin
Version: 0.40.0
Node: 22.x (any version emitting DEP0190)
Platform: Windows (win32)

Warning

(node:NNNNN) [DEP0190] DeprecationWarning: Passing args to a child process with shell option true can lead to security vulnerabilities, as the arguments are not escaped, only concatenated.

Fires on every Claude Code / Cursor session start via the SessionStart hook chain hooks/hooks.json -> session-start-profiler.mjs.

Root cause

hooks/session-start-profiler.mjs:284 builds spawn options with shell: true on Windows, then :288 and :304 invoke the file-spawn API with a binary + args + those options. Node 22 flags the args + shell:true combination because args bypass shell quoting (injection risk on hostile binary paths or arg values).

Per the comment on :274-278, shell:true was added to work around .cmd/.bat shim spawning after CVE-2024-27980. That workaround is what trips the deprecation.

Suggested fix

Switch the Windows path to a single quoted command string via the sync-shell API (which accepts a command string natively, no args array, no DEP0190):

• Build a runProbe(binary, args) helper.
• On Windows: pass `"${binary}" ${args.join(" ")}` to the sync-shell API.
• On non-Windows: keep the existing file-spawn call.
• Drop shell:true from the shared options object.

Binary path quoted to survive Program Files. Static internal arg arrays need no escaping.

Alternative: keep the file-spawn API, drop shell:true, resolve the .cmd shim explicitly via PATHEXT iteration before spawn.

Impact

Non-blocking. Session continues. Cosmetic noise on every startup for Windows users on Node 22+.

Repro

1. Windows + Node 22.x
2. Install vercel plugin 0.40.0
3. Open any Claude Code session -> warning fires from session-start-profiler.mjs

File at: https://github.com/vercel/vercel-plugin/issues/new

Start in hooks/session-start-profiler.mjs around lines 274-304 and trace its registration from hooks/hooks.json. Reproduce the warning on Windows with Node 22, then adjust the Windows invocation while preserving the non-Windows path and existing .cmd/.bat behavior. Done means session startup no longer emits DEP0190.