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Fix: keep the node runtime probe clear of cmd.exe metacharacters (#458)

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Volta's Windows shims exec through `cmd /C`, which re-parses the argument
list, so the `>=` inside the probe's `node -e` payload was read as output
redirection. The command died with "The filename, directory name, or volume
label syntax is incorrect" before node started, the guard read that as a
missing runtime, and the hook it exists to protect was disabled on every
PostToolUse and Stop. A user on a supported Node 24 got a one-time notice
telling them to install Node 22, then silence.

Clamping with Math.min is the same floor test in the same ES5-only syntax,
with no character cmd.exe can claim. Verified through the Volta shim on Node
24.16.0 and 22.18.0 (exit 0) and against a real Node 20.6.1 binary (exit 1),
so the floor is unchanged. Adds a regression test asserting no `<`, `>`, or
newline reaches any generated `node -e` payload.

Upstream cause: volta-cli/volta#1791.

Prepared with AI assistance (Claude Code).
This commit is contained in:
Rex Lorenzo
2026-08-03 15:02:29 -07:00
committed by GitHub
parent e2761cae80
commit 14d2641685
8 changed files with 26 additions and 12 deletions
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plugin/hooks/hooks.json
+2 -2
View File
@@ -6,7 +6,7 @@
"hooks": [
{
"type": "command",
"command": "[ ! -f \"${CLAUDE_PLUGIN_ROOT}/skills/impeccable/scripts/hook.mjs\" ] || ! { node -e \"process.exit(parseInt(process.versions.node,10)>=22?0:1)\" 2>/dev/null || { D=\"$HOME/.impeccable\"; [ -f \"$D/node-unsupported\" ] || { mkdir -p \"$D\" 2>/dev/null && : > \"$D/node-unsupported\" 2>/dev/null && printf '%s' '{\"systemMessage\":\"The impeccable design hook is not running: no Node 22 or newer on PATH. Install one, or remove the impeccable hook from your harness settings.\"}'; }; exit 0; }; } || node \"${CLAUDE_PLUGIN_ROOT}/skills/impeccable/scripts/hook.mjs\"",
"command": "[ ! -f \"${CLAUDE_PLUGIN_ROOT}/skills/impeccable/scripts/hook.mjs\" ] || ! { node -e \"process.exit(Math.min(parseInt(process.versions.node,10),22)===22?0:1)\" 2>/dev/null || { D=\"$HOME/.impeccable\"; [ -f \"$D/node-unsupported\" ] || { mkdir -p \"$D\" 2>/dev/null && : > \"$D/node-unsupported\" 2>/dev/null && printf '%s' '{\"systemMessage\":\"The impeccable design hook is not running: no Node 22 or newer on PATH. Install one, or remove the impeccable hook from your harness settings.\"}'; }; exit 0; }; } || node \"${CLAUDE_PLUGIN_ROOT}/skills/impeccable/scripts/hook.mjs\"",
"timeout": 5,
"statusMessage": "Checking UI changes"
}
@@ -18,7 +18,7 @@
"hooks": [
{
"type": "command",
"command": "[ ! -f \"${CLAUDE_PLUGIN_ROOT}/skills/impeccable/scripts/hook.mjs\" ] || ! { node -e \"process.exit(parseInt(process.versions.node,10)>=22?0:1)\" 2>/dev/null || { D=\"$HOME/.impeccable\"; [ -f \"$D/node-unsupported\" ] || { mkdir -p \"$D\" 2>/dev/null && : > \"$D/node-unsupported\" 2>/dev/null && printf '%s' '{\"systemMessage\":\"The impeccable design hook is not running: no Node 22 or newer on PATH. Install one, or remove the impeccable hook from your harness settings.\"}'; }; exit 0; }; } || node \"${CLAUDE_PLUGIN_ROOT}/skills/impeccable/scripts/hook.mjs\"",
"command": "[ ! -f \"${CLAUDE_PLUGIN_ROOT}/skills/impeccable/scripts/hook.mjs\" ] || ! { node -e \"process.exit(Math.min(parseInt(process.versions.node,10),22)===22?0:1)\" 2>/dev/null || { D=\"$HOME/.impeccable\"; [ -f \"$D/node-unsupported\" ] || { mkdir -p \"$D\" 2>/dev/null && : > \"$D/node-unsupported\" 2>/dev/null && printf '%s' '{\"systemMessage\":\"The impeccable design hook is not running: no Node 22 or newer on PATH. Install one, or remove the impeccable hook from your harness settings.\"}'; }; exit 0; }; } || node \"${CLAUDE_PLUGIN_ROOT}/skills/impeccable/scripts/hook.mjs\"",
"timeout": 30,
"statusMessage": "Design deep pass"
}