[absol89]

Requested by Eric · project thread

Part of tiltedphoques#938 ("Offensive perks not working on other players").

What

A PvP hit is resolved on the victim's client, against its copy of the attacker. That copy never had the attacker's perks, so perk entry points (damage, crits, sneak, Apply Bashing Spell...) contributed nothing.

• Each player sends their perk list (GameId + rank) when it changes, when PvP turns on, or when someone joins (PlayerPerksRequest / NotifyPlayerPerks, relayed by the server PlayerService).
• On the victim's client, perk checks for a remote player answer from that list (RemotePerks, MagicTarget.cpp hooks).
• Perks are never added to the copy, so perk abilities don't run on it. Perks from mods the victim doesn't have are skipped.
• Only used when PvP is on and the attacker is a remote player. PvE hits and heal/buff spells don't use it (the heal bonus would otherwise stack to 2.25x).

Verified vs assumed

• Verified in Ghidra (SkyrimSE 1.6.1170): player perks live on PlayerCharacter, so the copy can't have them. For 1.7.104, only the existence of the new hook IDs was checked.
• Assumed: everything about in-game behavior. Not tested in game yet.

Testing

• Client, server, launcher and TPTests build; tests pass (new encoding tests in Code/tests/encoding.cpp).
• Still needed, two clients with PvP on: attacker with a damage perk (e.g. Armsman) vs without, compare damage; sneak attack multiplier; a perk from a mod only one player has (no crash); PvP off (no change); PvE damage unchanged.

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