Second in-combat Layer-2 mechanic, reusing Amendment's round-end seam. In the
Seamstress's phase 2 (<=35% HP) the room sews inside-out in a repeating
warn(1)->sting(2) cadence, telegraphed one round ahead: during a pulse player
heals (self + ally) invert to damage, floored at 1 HP. State
inversionActive/inversionTelegraph round-trips through CombatStatuses so a
suspend/resume can't drop or double a pulse.
Sim surfaced that unplace is reach-bound (only ~37% reach the boss, then cleared
her ~98%), so the mechanic alone is sub-noise. Re-strengthened the Seamstress,
the weakest T6 boss (over-softened by P7 for a zone lift that never came):
HP 385->460, Atk 39->45, Needle Rain proc 0.40->0.45. Sim-validated at
fighter zone 37.5% (in range), and a real boss fight now instead of a victory lap.
Claude-Session: https://claude.ai/code/session_0156WqjgsbmSY2U8eQ3Kkb1s
First in-combat Layer-2 mechanic. applyBossInCombatRoundEnd is a new
round-boundary seam called from the turn engine's stepRoundEnd, the
counterpart to the pre-combat applyBossRunModifiers. The Custodian snapshots
its HP at end of round 3 and rewinds to it once on the phase-2 crossing
(refunding front-loaded burst); a soft midnight timer past round 20 climbs
its Attack via the existing enemyAtkBuff. New state (EnemyRewindHP/Used)
round-trips through CombatStatuses so a suspend/resume can't replay the
rewind. Sim A/B (n=120 L20 party): last_meridian fighter 65->37.5% clear,
a clean -27.5pp swing attributable to the mechanic; shipped as-is per the
opt-in-endgame difficulty call.
Claude-Session: https://claude.ai/code/session_0156WqjgsbmSY2U8eQ3Kkb1s
The second Layer-2 postgame boss mechanic, and the first stateful in-combat one.
Valdris ("boss_valdris_ascendant", the Ossuary Ascendant) is bound to three
Verses hidden on the zone's secret nodes: every Verse the player finds and walks
before the fight unbinds one rebirth, every Verse they skip leaves it armed. A
full-clear explorer strips all three and fights a mortal lich; a speedrunner who
blows past the secrets fights a god who will not stay down.
New engine primitive: stackable rebirth. The stock survive_at_1 is a one-shot
1-HP stay; Valdris needs several rebirths that each restore a real pool.
combatState/CombatStatuses gain EnemyReviveCharges/EnemyReviveHP (round-tripped
through the turn engine so a suspend/resume keeps the live count), and enemyDown
consumes a charge after the survive_at_1 check, reviving to 25% of the
party-scaled max and emitting a phylactery_rebirth event. Zero for every
non-Valdris fight.
Unlike Greed Tax (a pure per-round recompute in applyBossRunModifiers), rebirths
are spent mid-fight, so the charge count is seeded ONCE at session creation
(seedBossRunStatuses, from unvisited secret Verses) and never re-derived on the
per-round enemy rebuild. Seeded from handleFightCmd after startPartyCombatSession.
Sim A/B (millenia, n=120 L20 party+Pete+pets, same binary, control neuters the
dispatch): mortal end (verses found) fighter 42.5% -- reproduces the deployed P7
ossuary baseline, confirming the mechanic doesn't touch the validated full-clear
path -- and the god end (0 verses) fighter 12.5%, a deadly-but-beatable flex arm.
The sim walks 0 verses (autopilot takes the first unlocked fork; Verses are
behind Perception locks), so the A/B brackets the whole player-agency gradient.
Claude-Session: https://claude.ai/code/session_0156WqjgsbmSY2U8eQ3Kkb1s
Add the pre-combat boss-hook seam for Tier-6 postgame bosses and the first
bespoke mechanic on it.
Seam: applyBossRunModifiers(bossID, enemy, run) in postgame_boss_hooks.go —
a pure, idempotent, bestiary-ID-dispatched hook that folds run-state-derived
adjustments into the freshly-built boss Combatant. No-op for every non-hooked
enemy or nil run. The turn engine (which resolves both prod bosses and the
sim) rebuilds the enemy every round via partyCombatantsForSession, so the hook
must be a pure function of run state — fine at a terminal boss room, where the
route is frozen. Wired at both enemy-finalization points: the per-round rebuild
and buildFightSeats' initial HP persist (threaded a run param; the caller
already had it).
Greed Tax (boss_aurvandryx / first_hoard): her Attack rises with the richness
of the route walked to reach her — the summed excess LootBias (>1.0) over the
run's visited nodes. Note run.LootCollected is the wrong signal (BossOnly
signature manifest, empty at the boss); the gilded veins on the graph are.
Attack += min(2.0*richness, 12). Same-binary A/B sweep (n=150, L20 party +
Pete + pets): taxless 66.7% -> taxed 48.0%, landing first_hoard mid-band.
Claude-Session: https://claude.ai/code/session_0156WqjgsbmSY2U8eQ3Kkb1s
