What it groups: tolerance, set-points, brakes, and traffic control so immunity is strong but not self-destructive.
Why this exists: to prevent autoimmunity and runaway inflammation, and to end responses cleanly.
3 sub-categories:
Tolerance Mechanisms: https://boundaries.wiki/tag/tolmec
Regulatory Cells: https://boundaries.wiki/tag/regcel
Signal Mediators & Set-Points: https://boundaries.wiki/tag/sigmed
