xint 2026.3.2.1

Fixed

• Fix X Article extraction: note_tweet support for extended posts (280-25K chars)
• Fix article metadata parsing: fallback to preview_text when plain_text missing
• Smart X Article fallback: bypass broken web_search for x.com URLs
• Remove x.com domain restriction in Grok web_search (was causing guaranteed timeouts)
• Security: timing-safe bearer token comparison, regex injection fix in .env parsing
• Security: SHA256 checksum verification in install.sh

Changed

• Removed unused --system flag from analyze command
• Deduplicated SKILL.md config fields