What it groups: fast, pre-wired defenses that block, sense, or contain threats before learning kicks in.
Why this exists: to buy time and reduce pathogen load so downstream layers don’t get overwhelmed.
4 sub-categories:
Physical & Chemical Barriers: https://boundaries.wiki/tag/phyche
Sentinel Cells: https://boundaries.wiki/tag/sencel
Rapid Response Effectors: https://boundaries.wiki/tag/rapres
Pattern Sensing: https://boundaries.wiki/tag/patsen
