Files
gogobee/internal/plugin/combat_engine_party.go
prosolis 055f07d3c0 Combat engine §2(a): the enemy charges for what a seat brings
Both scaling levers counted seats. partyEnemyHPScale gave +15% boss HP for any
roster >= 2, and partyActionExpectation lifted the enemy from 1 to 2.4 attacks a
round. A seat COUNT charges the same for an under-levelled friend, a hired NPC,
and a true peer — so a below-median body cost a full seat's worth of boss and did
not give a full seat's worth back.

Measured, once the companion's free full-heal was taken away and he became honest:
hiring him was WORSE than going alone (66.1% against solo's 69.0%). That is this
bug, and it has been live for every under-levelled friend anyone has ever invited.

Seats now carry a SeatWeight, and both levers scale on the summed weight of the
LIVING seats rather than on a head count. The weight is level-based, priced against
the leader, times a discount for a hireling (no subclass, no magic items, gear that
is never Masterwork — the layers a player accrues and a hireling never will).

Level, and deliberately not a power score: an HP-x-damage proxy would rank a cleric
below a fighter and quietly make every mixed HUMAN party easier, which is a
difficulty regression smuggled in under a bug fix.

The safety argument is one property: **a peer weighs exactly 1.0**. So the curves
interpolate between the integer knots the P8 sweep tuned — (1, 1.0), (2, 2.4),
2n-1 from 3 up — and every integer input returns exactly what it always returned.
Solo is byte-identical, a party of same-level humans is byte-identical, both
goldens hold unmoved, and only an UNEQUAL roster lands between the knots. That is
the entire point of the change.

It also finishes §2(b): a seat that is down now buys the enemy nothing. §2(b) fixed
the head-count half; a corpse still carried its full weight until this.

Measured, 640 runs/arm, same grid:

  solo                    69.0%   (unchanged — corpus intact)
  + Pete                  76.8%   (+7.8pp)
  + a human cleric peer   77.6%   (+8.6pp)

  band                 solo    +Pete     lift
  trailing (<40%)     10.0%    31.0%   +21.0pp
  middle              58.9%    76.8%   +17.9pp
  leading (>=70%)     93.5%    99.2%    +5.7pp

Help, never a carry: he rescues the players who were drowning and barely moves the
ones who were already fine — and he stays below a real human of the leader's level,
which is the invariant a hireling must never break.

Claude-Session: https://claude.ai/code/session_01J5SQZWoLmL3M3mw2XmHHdy
2026-07-11 15:20:49 -07:00

34 KiB