Smoking gun for "Monitor's on-screen QR works but no idx=7 push lands
on the PXE dashboard". Win11's dsregcmd emits ANSI VT100 escape codes
(e.g. \x1B[7mDeviceId\x1B[0m :) around field labels. Captured output
strings then have those codes between "DeviceId" and ":". The strict
regex 'DeviceId\s*:\s*<guid>' fails because \s* doesn't match ANSI
escape chars. $script:cache.DeviceId stays null, idx=7 push never
fires.
Build-QRCodeText was unaffected because it uses Select-String 'DeviceId'
(substring match, tolerates anything in between) then splits on ':'.
Fix: strip ANSI sequences via -replace '\x1B\[[0-9;]*[A-Za-z]', '' before
running the regex. Same pattern covers all CSI sequences dsregcmd uses.
Also force Out-String to get a single string back (was an array of lines
from 2>&1; -match on arrays returns matching elements but $matches
behavior across mixed objects is fragile).
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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