CRB 'Cast a Spell - Touch Attacks': 'You can score critical hits with either type of attack as long as the spell deals damage'; CRB 'Range - Touch': a touch spell threatens on a natural 20 and deals double damage on a successful confirmation. The melee and ranged spell-touch gates now add the target's cover bonus to touch AC (new _attack_cover_bonus helper shared with resolve_attack), roll the concealment miss chance after the hit (blinded attacker = total concealment convention), and resolve crit threat/confirm with damage doubling for damage-dealing touch spells. Non-damage touch spells do not threaten (no die consumed). Golden transcript unaffected.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
PF1e CRB (Magic - Ranged Touch Attacks): spells delivered by ray require a
ranged touch attack (BAB + Dex vs touch AC, no range increment) to hit a
hostile target; a miss wastes the slot. SpellSpec gains requires_ranged_touch,
set on the 8 SRD-confirmed rays (Ray of Frost, Ray of Enfeeblement, Scorching
Ray, Acid Arrow, Acid Splash, Disrupt Undead, Shard of Chaos, Spear of Purity).
Magic Missile and area spells are unaffected. Simplification (documented): no
size modifier / Weapon Finesse on the roll.
Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)
Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>