Capture the investigation behind the T5577 live validation: why the stock C
client won't run here (VS Code snap sandbox injects core20 libpthread — not a
client bug), the LF clock-detection parity gap vs the C client's DetectASKClock
(pm3py's detect_clock was weaker; now partially closed), and the data-block read
investigation. The latter reached ground truth via datasheet + C source + an
on-hardware write-read-back: no read/addressing bug — the live tag is just a
reverse-order EM4100 clone; the only artifact is unresolved Manchester polarity
(a real, resolvable improvement, noted).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
