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Adv 2.0 D&D Phase 11 D4b: Tier 3-5 trap catalog

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Adds tier3TrapCatalog (Antimagic Field, Necrotic Miasma, Symbol of
Death, Planar Rift) per design doc §6 Tier 3-5 table. Tiers 3, 4,
and 5 share this pool — the doc lumps them together. Antimagic
Field uses a new SuppressesMagic flag (no damage, narrative
suppression beat); the other three deliver dice damage and skip
the unmodelled secondary effects (max-HP debuff, drop-to-0,
teleport) for a later phase.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
prosolis
2026-05-08 13:26:22 -07:00
parent 61b7fff9e2
commit 8eaada5c1b
2 changed files with 203 additions and 7 deletions
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91
internal/plugin/dnd_zone_traps.go
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@@ -27,6 +27,10 @@ const (
TrapFlameJet ZoneTrapKind = "flame_jet"
TrapCollapsingCeil ZoneTrapKind = "collapsing_ceiling"
TrapGlyphOfWarding ZoneTrapKind = "glyph_of_warding"
TrapAntimagicField ZoneTrapKind = "antimagic_field"
TrapNecroticMiasma ZoneTrapKind = "necrotic_miasma"
TrapSymbolOfDeath ZoneTrapKind = "symbol_of_death"
TrapPlanarRift ZoneTrapKind = "planar_rift"
)
// zoneTrapDef — static definition of a zone trap. Damage dice are in
@@ -40,10 +44,11 @@ type zoneTrapDef struct {
DetectDC int
DamageDiceN int // 0 if no direct damage
DamageDiceD int // sides
DamageType string // "bludgeoning", "piercing", "poison", ...
AlertsEnemies bool // tripwire-class: 0 damage, raises alarm
Tier ZoneTier
Weight int // 1..10, default 5
DamageType string // "bludgeoning", "piercing", "poison", ...
AlertsEnemies bool // tripwire-class: 0 damage, raises alarm
SuppressesMagic bool // antimagic-class: 0 damage, narrative suppression
Tier ZoneTier
Weight int // 1..10, default 5
}
// tier1TrapCatalog — design doc §6 Tier 1 table.
@@ -126,14 +131,83 @@ var tier2TrapCatalog = []zoneTrapDef{
},
}
// trapsByTier returns all traps registered at the given tier. Tier 3+
// catalogs append to this switch in later sub-phases (D4a).
// tier3TrapCatalog — design doc §6 Tier 3–5 table. The doc lumps all
// high-tier traps into a single list, so tiers 3, 4, and 5 share this
// pool. Two of the four entries (Antimagic Field, Symbol of Death) have
// effects that don't fit the dice-only damage model:
//
// - Antimagic Field: no damage; SuppressesMagic flag flips the
// narration to a non-damaging suppression beat. The actual
// spell-suppression mechanic is left to a later phase — for now
// the line tells the player magic is choked in this room.
// - Necrotic Miasma: design doc says "6d6 + max HP -10 until long
// rest". The max-HP debuff isn't modeled here; trap delivers the
// 6d6 necrotic damage only.
// - Symbol of Death: doc reads "INT DC 20 or drop to 0 HP". We
// approximate with 8d10 psychic; the existing near-KO cap in
// applyTrapEffectWithDetect prevents an outright kill.
// - Planar Rift: 4d10 psychic. The teleport-to-random-room mechanic
// isn't modeled — trap just deals psychic damage for now.
var tier3TrapCatalog = []zoneTrapDef{
{
Kind: TrapAntimagicField,
Display: "Antimagic Field",
Trigger: "the air thickens and every charm at your belt goes cold",
DetectSkill: SkillArcana,
DetectDC: 18,
SuppressesMagic: true,
Tier: ZoneTierJourneyman,
Weight: 3,
},
{
Kind: TrapNecroticMiasma,
Display: "Necrotic Miasma",
Trigger: "the sarcophagus lid shifts and a green-black fume pours out",
DetectSkill: SkillPerception,
DetectDC: 16,
DamageDiceN: 6,
DamageDiceD: 6,
DamageType: "necrotic",
Tier: ZoneTierJourneyman,
Weight: 5,
},
{
Kind: TrapSymbolOfDeath,
Display: "Symbol of Death",
Trigger: "an inscribed sigil flares and your vision blanks to white",
DetectSkill: SkillInvestigation,
DetectDC: 20,
DamageDiceN: 8,
DamageDiceD: 10,
DamageType: "psychic",
Tier: ZoneTierJourneyman,
Weight: 2,
},
{
Kind: TrapPlanarRift,
Display: "Planar Rift",
Trigger: "the floor folds wrong and a tear of starless dark grasps at you",
DetectSkill: SkillArcana,
DetectDC: 20,
DamageDiceN: 4,
DamageDiceD: 10,
DamageType: "psychic",
Tier: ZoneTierJourneyman,
Weight: 3,
},
}
// trapsByTier returns all traps registered at the given tier. Tiers 3,
// 4, and 5 share the Tier 3 catalog per the design doc's combined
// "Tier 3–5 Traps" table; later phases may split them.
func trapsByTier(t ZoneTier) []zoneTrapDef {
switch t {
case ZoneTierBeginner:
return tier1TrapCatalog
case ZoneTierApprentice:
return tier2TrapCatalog
case ZoneTierJourneyman, ZoneTierVeteran, ZoneTierLegendary:
return tier3TrapCatalog
}
return nil
}
@@ -190,7 +264,7 @@ func zoneTrapSelectorHash(runID string, roomIdx int) uint64 {
// here; the design-doc CON DC 11 save is folded into the same dice pool
// as a flattened average.
func rollTrapDamage(tr zoneTrapDef, runID string, roomIdx int) int {
if tr.AlertsEnemies || tr.DamageDiceN == 0 || tr.DamageDiceD == 0 {
if tr.AlertsEnemies || tr.SuppressesMagic || tr.DamageDiceN == 0 || tr.DamageDiceD == 0 {
return 0
}
rng := rand.New(rand.NewPCG(zoneTrapSelectorHash(runID, roomIdx), 0x712D2A))
@@ -207,6 +281,9 @@ func trapDamageHeader(tr zoneTrapDef, dmg int, hpCur, hpMax int) string {
if tr.AlertsEnemies {
return fmt.Sprintf("🔔 **%s** — %s. The next room knows you're here.", tr.Display, tr.Trigger)
}
if tr.SuppressesMagic {
return fmt.Sprintf("🚫 **%s** — %s. Spells fizzle and enchanted gear sleeps until you leave the room.", tr.Display, tr.Trigger)
}
dice := fmt.Sprintf("%dd%d", tr.DamageDiceN, tr.DamageDiceD)
return fmt.Sprintf("💢 **%s** (%s %s) — **%d HP** (%d/%d remaining).",
tr.Display, dice, tr.DamageType, dmg, hpCur, hpMax)