The research feeds M5b's sanitizer. One finding is a bug in the M5a
draft: category Cf misses variation selectors, the combining grapheme
joiner, and the Hangul and Braille fillers.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
Writes from sessions that have read untrusted content go to the
archive, labelled untrusted, and never reach the prompt. Every write is
checked, announced in its thread, journalled and can be undone.
Session-scoped approvals for other tools become an open decision.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
kyleandClaude Opus 5.5