N4/E1: T3 housing payoffs + a home-rest "well-rested" buff

Turn the dead top housing tiers into something worth buying. All three
land without a schema bump, and TestCombatCharacterization stays
byte-identical (the balance corpus never sets the new fields).

T3 trophy room: treasure cap 3->4 at HouseTier>=3 (maxTreasuresForTier).
Enforced at the save gate only -- HouseTier is never written downward,
so a held 4th treasure below tier 3 is unreachable and a load-time cap in
computeAdvBonuses would just add a query for an impossible state. The
all-irreplaceable manual discard prompt now lists the 4th slot too.

T3 workshop: +5% craft success at HouseTier>=3, lifting the cap 0.95->0.98
so a maxed forager still gains. craftingSuccessRate takes a workshopBonus,
threaded through autoCraftConsumables and renderRecipesKnown.

Well-rested buff (replaces the plan's T4 "inn-quality rest", a verified
no-op -- home rest already equals inn rest). Home-only (the inn and a
tier-1 shack grant nothing), starts at T2 and grows through T4, expires at
the next long rest:
  - Temp HP cushion (8/12/16% of MaxHP). TempHP was a dormant field; wired
    into applyDnDHPScaling as MaxHP headroom -- additive and golden-safe.
  - Bonus spell slots (+1/+2/+3 at the caster's highest slot level), the
    real reward, lifting casters who trail on spell-pool richness.
    applyLongRestSpellSlots resets the pool to base then folds in the
    bonus; expiry is stateless (next rest's reset drops it).

Magnitudes are tunable defaults; revisit against the post-parties
re-baseline.

Claude-Session: https://claude.ai/code/session_017mEwUmmS7aQTP2NQXj6rUa

internal/plugin/adventure.go

@@ -1126,7 +1126,7 @@ func (p *AdventurePlugin) checkTreasureDrop(userID id.UserID, char *AdventureCha
 		return
 	}
 
-	if count < advMaxTreasures {
+	if count < maxTreasuresForTier(char.HouseTier) {
 		// Directly save
 		if err := advSaveTreasure(userID, drop.Def); err != nil {
 			slog.Error("adventure: failed to save treasure", "user", userID, "err", err)
@@ -1511,7 +1511,7 @@ func (p *AdventurePlugin) handleRecipesCmd(ctx MessageContext) error {
 	if err != nil {
 		return p.SendDM(ctx.Sender, "Failed to load your character.")
 	}
-	return p.SendDM(ctx.Sender, renderRecipesKnown(char.ForagingSkill))
+	return p.SendDM(ctx.Sender, renderRecipesKnown(char.ForagingSkill, homeWorkshopCraftBonus(char.HouseTier)))
 }
 
 func (p *AdventurePlugin) handleTreasuresCmd(ctx MessageContext, arg string) error {

internal/plugin/adventure_consumables.go

@@ -346,15 +346,34 @@ var craftingRecipes = []CraftingRecipe{
 	{Result: "Voidstone Shard", Ingredients: []string{"Voidstone", "Mythril Ore"}, MinForaging: 30, Tier: 5},
 }
 
-// craftingSuccessRate returns the success chance for a recipe given foraging level.
+// houseTierWorkshop is the T3 "Comfortable" house that unlocks the workshop —
-// Base rate is 50% at minimum level, +3% per 5 levels above minimum, capped at 95%.
+// a flat craft-success bonus while crafting at home.
-func craftingSuccessRate(foragingLevel, minForaging int) float64 {
+const houseTierWorkshop = 3
+
+// homeWorkshopCraftBonus returns the additive craft-success bonus from a T3+
+// home workshop. Tier 1/2 and no house grant none.
+func homeWorkshopCraftBonus(houseTier int) float64 {
+	if houseTier >= houseTierWorkshop {
+		return 0.05
+	}
+	return 0
+}
+
+// craftingSuccessRate returns the success chance for a recipe given foraging
+// level. Base rate is 50% at minimum level, +3% per 5 levels above minimum,
+// capped at 95%. A T3+ home workshop adds workshopBonus on top and lifts the
+// cap to 98%, so a maxed forager still gains a little from the bench.
+func craftingSuccessRate(foragingLevel, minForaging int, workshopBonus float64) float64 {
 	base := 0.50
 	levelsAbove := foragingLevel - minForaging
 	bonus := float64(levelsAbove) / 5.0 * 0.03
-	rate := base + bonus
+	rate := base + bonus + workshopBonus
-	if rate > 0.95 {
+	cap := 0.95
-		return 0.95
+	if workshopBonus > 0 {
+		cap = 0.98
+	}
+	if rate > cap {
+		return cap
 	}
 	return rate
 }
@@ -369,7 +388,7 @@ type CraftResult struct {
 // their current foraging level, plus a teaser line for the next unlock
 // threshold. Hides exact ingredient lists for recipes the player hasn't
 // unlocked — only the count of locked recipes is shown.
-func renderRecipesKnown(foragingLevel int) string {
+func renderRecipesKnown(foragingLevel int, workshopBonus float64) string {
 	var sb strings.Builder
 	sb.WriteString(fmt.Sprintf("🧪 **Crafting Recipes** — Foraging Lv.%d\n\n", foragingLevel))
 
@@ -377,6 +396,9 @@ func renderRecipesKnown(foragingLevel int) string {
 		sb.WriteString("_Auto-crafting unlocks at Foraging Lv.10. Keep gathering._")
 		return sb.String()
 	}
+	if workshopBonus > 0 {
+		sb.WriteString(fmt.Sprintf("_🔨 Home workshop: +%.0f%% craft success._\n\n", workshopBonus*100))
+	}
 
 	// Group recipes by tier, list those known.
 	known := map[int][]CraftingRecipe{}
@@ -402,7 +424,7 @@ func renderRecipesKnown(foragingLevel int) string {
 		}
 		sb.WriteString(fmt.Sprintf("**Tier %d** (Foraging %d+)\n", tier, recipes[0].MinForaging))
 		for _, r := range recipes {
-			rate := craftingSuccessRate(foragingLevel, r.MinForaging) * 100
+			rate := craftingSuccessRate(foragingLevel, r.MinForaging, workshopBonus) * 100
 			sb.WriteString(fmt.Sprintf("  • %s — %s (%.0f%% success)\n",
 				r.Result, strings.Join(r.Ingredients, " + "), rate))
 		}
@@ -433,7 +455,7 @@ var craftXPFailure = map[int]int{1: 3, 2: 5, 3: 8, 4: 12, 5: 18}
 //
 // Side effects: grants foraging XP per attempt (success > failure) and bumps
 // the player's CraftsSucceeded counter on each success.
-func autoCraftConsumables(userID id.UserID, items []AdvItem, foragingLevel int) ([]CraftResult, []AdvItem) {
+func autoCraftConsumables(userID id.UserID, items []AdvItem, foragingLevel int, workshopBonus float64) ([]CraftResult, []AdvItem) {
 	if foragingLevel < 10 {
 		return nil, items
 	}
@@ -452,7 +474,7 @@ func autoCraftConsumables(userID id.UserID, items []AdvItem, foragingLevel int)
 			break
 		}
 
-		rate := craftingSuccessRate(foragingLevel, bestRecipe.MinForaging)
+		rate := craftingSuccessRate(foragingLevel, bestRecipe.MinForaging, workshopBonus)
 		success := rand.Float64() < rate
 
 		if success {

internal/plugin/adventure_render.go

@@ -1037,8 +1037,17 @@ func renderAdvLeaderboard(chars []AdvLeaderboardEntry) string {
 // ── Treasure Discard Prompt ──────────────────────────────────────────────────
 
 func renderAdvTreasureDiscardPrompt(newTreasure *AdvTreasureDef, existing []AdvTreasureDef) string {
-	if len(TreasureInventoryCap) == 0 {
+	// The flavor templates below are written for the base 3-slot set. With a
-		return "You found a treasure but your inventory is full. Reply 1, 2, or 3 to discard, or `keep`."
+	// T3 trophy room the set can hold 4, so fall back to a plain dynamic list
+	// whenever it isn't exactly 3 — every slot has to be visible to choose it.
+	if len(TreasureInventoryCap) == 0 || len(existing) != 3 {
+		var b strings.Builder
+		fmt.Fprintf(&b, "You found **%s** but your treasure slots are full. Discard one to make room:\n", newTreasure.Name)
+		for i, ex := range existing {
+			fmt.Fprintf(&b, "%d. %s — %s\n", i+1, ex.Name, ex.InventoryDesc)
+		}
+		fmt.Fprintf(&b, "\nReply with the number to discard, or `keep` to leave the new one behind.")
+		return b.String()
 	}
 
 	// Build substitution map with existing treasure info

internal/plugin/adventure_treasure.go

@@ -50,6 +50,26 @@ var advTreasureDropRates = map[int]float64{
 
 const advMaxTreasures = 3
 
+// houseTierTrophyRoom is the T3 "Comfortable" house that unlocks the trophy
+// room — a fourth treasure slot.
+const houseTierTrophyRoom = 3
+
+// maxTreasuresForTier returns how many treasures a player may hold. The base
+// cap is 3; a T3+ house adds the trophy-room slot for a 4th.
+//
+// The extra slot is a housing perk, but HouseTier is only ever written upward
+// (purchase paths; there is no foreclosure/downgrade that writes it back down),
+// so a player can only ever hold a 4th treasure while tier>=3. There is
+// therefore no reachable state where a held treasure must be revoked at
+// bonus-computation time, and the cap is enforced only at the save gate.
+func maxTreasuresForTier(houseTier int) int {
+	n := advMaxTreasures
+	if houseTier >= houseTierTrophyRoom {
+		n++
+	}
+	return n
+}
+
 // ── Treasure Definitions ─────────────────────────────────────────────────────
 
 var advAllTreasures = map[int][]AdvTreasureDef{

internal/plugin/adventure_treasure_test.go

@@ -79,3 +79,13 @@ func TestAdvLocForZone(t *testing.T) {
 		t.Errorf("name = %q, want the zone's display name", loc.Name)
 	}
 }
+
+// TestMaxTreasuresForTier pins the T3 "trophy room" 4th slot: the base cap is
+// 3, and only a tier-3+ home lifts it to 4.
+func TestMaxTreasuresForTier(t *testing.T) {
+	for tier, want := range map[int]int{0: 3, 1: 3, 2: 3, 3: 4, 4: 4} {
+		if got := maxTreasuresForTier(tier); got != want {
+			t.Errorf("maxTreasuresForTier(%d) = %d, want %d", tier, got, want)
+		}
+	}
+}

internal/plugin/adventure_well_rested.go

@@ -0,0 +1,110 @@
+package plugin
+
+import (
+	"fmt"
+	"strings"
+)
+
+// Well-rested — a long rest taken at a home of tier 2+ grants a temporary buff
+// that lasts until the next long rest. Renting a room at Thom Krooke's inn does
+// not: the perk exists to give owning (and upgrading) a house a payoff the inn
+// can't match, and it turns the dead T3/T4 prestige tiers into something worth
+// buying.
+//
+// Two halves, both scaling with house tier (2 < 3 < 4):
+//   - wellRestedTempHP: a temporary hit-point cushion, layered above MaxHP for
+//     the day's fights via applyDnDHPScaling; and
+//   - wellRestedSlotBonus: bonus spell slots folded into the caster's pool at
+//     their highest available slot level.
+//
+// The tuning below is deliberately generous toward casters, who trail on
+// spell-pool richness — the bonus slots are the substantive reward and the
+// temp HP is a lighter feel-good cushion. All values are tunable.
+//
+// Nothing here is a secret discovery mechanic (cf. Misty/Arina), so the rest
+// message surfaces exactly what was granted.
+
+// homeRestTempHPPct maps house tier → temp-HP fraction of MaxHP.
+func homeRestTempHPPct(houseTier int) float64 {
+	switch {
+	case houseTier >= 4:
+		return 0.16
+	case houseTier >= 3:
+		return 0.12
+	case houseTier >= 2:
+		return 0.08
+	default:
+		return 0
+	}
+}
+
+// homeRestBonusSlots maps house tier → number of bonus spell slots.
+func homeRestBonusSlots(houseTier int) int {
+	switch {
+	case houseTier >= 4:
+		return 3
+	case houseTier >= 3:
+		return 2
+	case houseTier >= 2:
+		return 1
+	default:
+		return 0
+	}
+}
+
+// wellRestedTempHP returns the temporary HP granted by a home long rest at the
+// given house tier. Tier 1 and the inn grant none. Always at least 1 when the
+// tier qualifies, so a low-HP character still sees the buff.
+func wellRestedTempHP(hpMax, houseTier int) int {
+	pct := homeRestTempHPPct(houseTier)
+	if pct <= 0 {
+		return 0
+	}
+	hp := int(float64(hpMax) * pct)
+	if hp < 1 {
+		hp = 1
+	}
+	return hp
+}
+
+// wellRestedSlotBonus returns the temporary bonus spell slots granted by a home
+// long rest, placed entirely at the caster's highest available slot level (the
+// most valuable, and one a caster is guaranteed to have). Tier 1, the inn, and
+// non-casters (empty pool) grant none.
+func wellRestedSlotBonus(houseTier int, pool map[int]int) map[int]int {
+	n := homeRestBonusSlots(houseTier)
+	if n == 0 || len(pool) == 0 {
+		return nil
+	}
+	highest := 0
+	for lvl := range pool {
+		if lvl > highest {
+			highest = lvl
+		}
+	}
+	if highest == 0 {
+		return nil
+	}
+	return map[int]int{highest: n}
+}
+
+// wellRestedSummary renders the player-facing description of a granted buff,
+// e.g. "+18 temp HP, +2 level-5 spell slots". Returns "" when nothing was
+// granted (tier 1, the inn, or a non-caster with no temp HP).
+func wellRestedSummary(tempHP int, slotBonus map[int]int) string {
+	var bits []string
+	if tempHP > 0 {
+		bits = append(bits, fmt.Sprintf("+%d temp HP", tempHP))
+	}
+	for lvl, n := range slotBonus {
+		if n <= 0 {
+			continue
+		}
+		plural := ""
+		if n != 1 {
+			plural = "s"
+		}
+		bits = append(bits, fmt.Sprintf("+%d level-%d spell slot%s", n, lvl, plural))
+	}
+	return strings.Join(bits, ", ")
+}

internal/plugin/adventure_well_rested_test.go

@@ -0,0 +1,192 @@
+package plugin
+
+import (
+	"testing"
+
+	"gogobee/internal/db"
+
+	"maunium.net/go/mautrix/id"
+)
+
+func TestWellRestedTempHP_ByTier(t *testing.T) {
+	cases := []struct {
+		tier, hpMax, want int
+	}{
+		{0, 100, 0},  // no house
+		{1, 100, 0},  // tier-1 shack: nothing
+		{2, 100, 8},  // 8%
+		{3, 100, 12}, // 12%
+		{4, 100, 16}, // 16%
+		{2, 3, 1},    // rounds to <1 → floored to 1
+	}
+	for _, c := range cases {
+		if got := wellRestedTempHP(c.hpMax, c.tier); got != c.want {
+			t.Errorf("wellRestedTempHP(hpMax=%d, tier=%d) = %d, want %d", c.hpMax, c.tier, got, c.want)
+		}
+	}
+}
+
+func TestWellRestedSlotBonus_PlacesAtHighestLevel(t *testing.T) {
+	pool := map[int]int{1: 4, 2: 3, 3: 2} // highest available = 3
+
+	if got := wellRestedSlotBonus(1, pool); got != nil {
+		t.Errorf("tier 1 → %v, want nil", got)
+	}
+	if got := wellRestedSlotBonus(0, pool); got != nil {
+		t.Errorf("tier 0 → %v, want nil", got)
+	}
+	if got := wellRestedSlotBonus(3, nil); got != nil {
+		t.Errorf("non-caster (nil pool) → %v, want nil", got)
+	}
+
+	for tier, wantN := range map[int]int{2: 1, 3: 2, 4: 3} {
+		got := wellRestedSlotBonus(tier, pool)
+		if len(got) != 1 || got[3] != wantN {
+			t.Errorf("tier %d → %v, want {3: %d}", tier, got, wantN)
+		}
+	}
+}
+
+func TestApplyDnDHPScaling_TempHPCushion(t *testing.T) {
+	// Golden-safety: TempHP==0 must leave a full-HP character untouched
+	// (StartHP stays 0 = "enter at MaxHP", MaxHP unchanged).
+	stats := CombatStats{MaxHP: 100, HPBonus: 10}
+	full := &DnDCharacter{HPMax: 100, HPCurrent: 100, TempHP: 0}
+	applyDnDHPScaling(&stats, full)
+	if stats.MaxHP != 100 || stats.StartHP != 0 {
+		t.Fatalf("TempHP=0 full HP: MaxHP=%d StartHP=%d, want 100/0", stats.MaxHP, stats.StartHP)
+	}
+
+	// Full HP + cushion: MaxHP grows by TempHP, StartHP stays the sentinel so
+	// combat enters at the bumped max (full + cushion).
+	stats = CombatStats{MaxHP: 100, HPBonus: 10}
+	rested := &DnDCharacter{HPMax: 100, HPCurrent: 100, TempHP: 15}
+	applyDnDHPScaling(&stats, rested)
+	if stats.MaxHP != 115 || stats.StartHP != 0 {
+		t.Fatalf("full HP + cushion: MaxHP=%d StartHP=%d, want 115/0", stats.MaxHP, stats.StartHP)
+	}
+
+	// Wounded + cushion: entry HP is current + gear bonus + cushion, MaxHP grows.
+	stats = CombatStats{MaxHP: 100, HPBonus: 10}
+	wounded := &DnDCharacter{HPMax: 100, HPCurrent: 40, TempHP: 15}
+	applyDnDHPScaling(&stats, wounded)
+	if stats.MaxHP != 115 || stats.StartHP != 65 { // 40 + 10 + 15
+		t.Fatalf("wounded + cushion: MaxHP=%d StartHP=%d, want 115/65", stats.MaxHP, stats.StartHP)
+	}
+}
+
+func TestApplyLongRestSpellSlots_GrantAndExpiry(t *testing.T) {
+	if err := db.Init(t.TempDir()); err != nil {
+		t.Fatalf("db.Init: %v", err)
+	}
+	t.Cleanup(db.Close)
+
+	uid := id.UserID("@rested_caster:example")
+	c := &DnDCharacter{
+		UserID: uid, Race: RaceHuman, Class: ClassCleric, Level: 5,
+		STR: 10, DEX: 12, CON: 14, INT: 10, WIS: 16, CHA: 10,
+	}
+	c.HPMax = computeMaxHP(c.Class, abilityModifier(c.CON), c.Level)
+	c.HPCurrent = c.HPMax
+	if err := SaveDnDCharacter(c); err != nil {
+		t.Fatalf("SaveDnDCharacter: %v", err)
+	}
+	if err := setSpellSlotsForCharacter(c); err != nil {
+		t.Fatalf("setSpellSlotsForCharacter: %v", err)
+	}
+
+	base, _ := getSpellSlots(uid)
+	if len(base) == 0 {
+		t.Fatal("cleric L5 should have a base slot pool")
+	}
+	highest := 0
+	for lvl := range base {
+		if lvl > highest {
+			highest = lvl
+		}
+	}
+
+	// Home rest at tier 4 → +3 at highest level, used reset to 0.
+	bonus, err := applyLongRestSpellSlots(c, 4)
+	if err != nil {
+		t.Fatalf("applyLongRestSpellSlots(tier4): %v", err)
+	}
+	if bonus[highest] != 3 {
+		t.Fatalf("tier-4 bonus = %v, want {%d: 3}", bonus, highest)
+	}
+	after, _ := getSpellSlots(uid)
+	if after[highest][0] != base[highest][0]+3 {
+		t.Errorf("highest total = %d, want base+3 = %d", after[highest][0], base[highest][0]+3)
+	}
+	for lvl, pair := range after {
+		if pair[1] != 0 {
+			t.Errorf("slot L%d used = %d after rest, want 0", lvl, pair[1])
+		}
+	}
+
+	// Next rest at the inn (tier 0) → bonus expires, totals back to base.
+	if _, err := applyLongRestSpellSlots(c, 0); err != nil {
+		t.Fatalf("applyLongRestSpellSlots(tier0): %v", err)
+	}
+	reset, _ := getSpellSlots(uid)
+	for lvl, pair := range reset {
+		if pair[0] != base[lvl][0] {
+			t.Errorf("L%d total = %d after expiry, want base %d", lvl, pair[0], base[lvl][0])
+		}
+	}
+
+	// Tier-1 house grants nothing.
+	if bonus, _ := applyLongRestSpellSlots(c, 1); bonus != nil {
+		t.Errorf("tier-1 bonus = %v, want nil", bonus)
+	}
+}
+
+func TestApplyLongRestSpellSlots_NonCaster(t *testing.T) {
+	if err := db.Init(t.TempDir()); err != nil {
+		t.Fatalf("db.Init: %v", err)
+	}
+	t.Cleanup(db.Close)
+
+	uid := id.UserID("@rested_fighter:example")
+	c := &DnDCharacter{UserID: uid, Race: RaceHuman, Class: ClassFighter, Level: 5, CON: 14}
+	c.HPMax = computeMaxHP(c.Class, abilityModifier(c.CON), c.Level)
+	c.HPCurrent = c.HPMax
+	if err := SaveDnDCharacter(c); err != nil {
+		t.Fatalf("SaveDnDCharacter: %v", err)
+	}
+
+	bonus, err := applyLongRestSpellSlots(c, 4)
+	if err != nil {
+		t.Fatalf("applyLongRestSpellSlots: %v", err)
+	}
+	if bonus != nil {
+		t.Errorf("non-caster bonus = %v, want nil", bonus)
+	}
+	if slots, _ := getSpellSlots(uid); len(slots) != 0 {
+		t.Errorf("non-caster has %d slot rows, want 0", len(slots))
+	}
+}
+
+// TestHomeWorkshop pins the T3 workshop craft bonus and its effect on the
+// success-rate cap.
+func TestHomeWorkshop(t *testing.T) {
+	for tier, want := range map[int]float64{0: 0, 1: 0, 2: 0, 3: 0.05, 4: 0.05} {
+		if got := homeWorkshopCraftBonus(tier); got != want {
+			t.Errorf("homeWorkshopCraftBonus(%d) = %.2f, want %.2f", tier, got, want)
+		}
+	}
+	// No workshop: base cap holds at 0.95 for a maxed forager.
+	if got := craftingSuccessRate(100, 1, 0); got != 0.95 {
+		t.Errorf("maxed forager, no workshop = %.3f, want 0.95", got)
+	}
+	// Workshop lifts the cap to 0.98.
+	if got := craftingSuccessRate(100, 1, 0.05); got != 0.98 {
+		t.Errorf("maxed forager, workshop = %.3f, want 0.98", got)
+	}
+	// Mid-level forager gets the flat +5% added below the cap.
+	base := craftingSuccessRate(15, 10, 0)
+	withShop := craftingSuccessRate(15, 10, 0.05)
+	if diff := withShop - base; diff < 0.049 || diff > 0.051 {
+		t.Errorf("workshop delta = %.3f, want ~0.05", diff)
+	}
+}

internal/plugin/combat_bridge.go

@@ -185,7 +185,7 @@ func (p *AdventurePlugin) loadConsumableInventory(userID id.UserID) []Consumable
 	// Auto-craft if player has foraging level 10+
 	char, err := loadAdvCharacter(userID)
 	if err == nil && char.ForagingSkill >= 10 {
-		craftResults, updatedItems := autoCraftConsumables(userID, items, char.ForagingSkill)
+		craftResults, updatedItems := autoCraftConsumables(userID, items, char.ForagingSkill, homeWorkshopCraftBonus(char.HouseTier))
 		if len(craftResults) > 0 {
 			items = updatedItems
 			for _, cr := range craftResults {

internal/plugin/dnd_combat.go

@@ -481,10 +481,23 @@ func formatN(n int, word string) string {
 // wound layered with the fresh equipment cushion. There is no scale
 // conversion; persistDnDHPAfterCombat is the inverse direct copy.
 func applyDnDHPScaling(stats *CombatStats, c *DnDCharacter) {
-	if c == nil || c.HPMax <= 0 || c.HPCurrent >= c.HPMax {
+	if c == nil || c.HPMax <= 0 {
 		return
 	}
-	startHP := c.HPCurrent + stats.HPBonus
+	// Well-rested temporary HP (from a long rest at a T2+ home) is a cushion
+	// layered above the fight's MaxHP. It is dormant (0) for anyone not
+	// currently rested — including every scenario in the balance corpus and
+	// the class-balance harness, which never sets it — so the full-HP fast
+	// path below stays byte-identical for them and the golden does not move.
+	if c.TempHP > 0 {
+		stats.MaxHP += c.TempHP
+	}
+	if c.HPCurrent >= c.HPMax {
+		// Full HP: StartHP=0 sentinel already means "enter at MaxHP", which
+		// now includes the +TempHP cushion.
+		return
+	}
+	startHP := c.HPCurrent + stats.HPBonus + c.TempHP
 	if startHP < 1 {
 		startHP = 1
 	}

internal/plugin/dnd_rest.go

@@ -222,8 +222,15 @@ func (p *AdventurePlugin) handleDnDLongRest(ctx MessageContext) error {
 		innPaid = true
 	}
 
+	// Well-rested buff: only when resting at your own home (not the inn), and
+	// only from tier 2 up — a tier-1 shack and a rented inn room grant nothing.
+	restTier := 0
+	if hasHousing {
+		restTier = house.Tier
+	}
+
 	c.HPCurrent = c.HPMax
-	c.TempHP = 0
+	c.TempHP = wellRestedTempHP(c.HPMax, restTier)
 	c.ShortRestCharges = c.Level
 	// Phase 10 SUB2a — long rest clears one level of exhaustion (5e: a
 	// long rest clears one). For Berserker who racks up exhaustion via
@@ -241,8 +248,9 @@ func (p *AdventurePlugin) handleDnDLongRest(ctx MessageContext) error {
 	}
 	markActedToday(ctx.Sender)
 	_ = refreshAllResources(ctx.Sender)
-	// Phase 9: spell slots refresh on long rest.
+	// Phase 9: spell slots refresh on long rest. A home rest also folds in the
-	_ = refreshSpellSlots(ctx.Sender)
+	// well-rested bonus slots (no-op for non-casters and inn/tier-1 rests).
+	slotBonus, _ := applyLongRestSpellSlots(c, restTier)
 	// Phase 9: Cleric prep flags reset (SP4) — until SP4 ships, default
 	// Cleric grants are already prepared=1 so this is a no-op for them.
 	// Voluntary concentration ends at long rest (mage_armor's 8h is exactly
@@ -263,5 +271,13 @@ func (p *AdventurePlugin) handleDnDLongRest(ctx MessageContext) error {
 	if line := dndRestLongFlavorLine(hasHousing); line != "" {
 		msg += "\n\n_" + line + "_"
 	}
+	if bits := wellRestedSummary(c.TempHP, slotBonus); bits != "" {
+		homeName := "home"
+		if def := houseTierByTier(restTier); def != nil {
+			homeName = def.Name
+		}
+		msg += fmt.Sprintf("\n\n🛏️ _Well-rested at your %s — %s until your next long rest._",
+			strings.ToLower(homeName), bits)
+	}
 	return p.SendDM(ctx.Sender, msg)
 }

internal/plugin/dnd_spells.go

@@ -564,6 +564,48 @@ func refreshSpellSlots(userID id.UserID) error {
 	return err
 }
 
+// applyLongRestSpellSlots resets a caster's slot pool to its base (class +
+// subclass) total with used=0, then folds in any well-rested bonus slots for a
+// home rest of the given tier. The bonus lives in `total`, so it is spent like
+// an ordinary slot and is wiped by the *next* long rest's reset — expiry needs
+// no separate bookkeeping. It is safe to call on every long rest because
+// ensureSpellsForCharacter already keeps `total` == slotsForCharacter(c) on
+// load, so the base reset is a no-op except for clearing a prior bonus.
+//
+// Non-casters have an empty pool; the function falls back to the plain
+// used=0 refresh and grants nothing. Returns the bonus actually granted (nil if
+// none) so the caller can name it in the rest message.
+func applyLongRestSpellSlots(c *DnDCharacter, restTier int) (map[int]int, error) {
+	pool := slotsForCharacter(c)
+	if len(pool) == 0 {
+		return nil, refreshSpellSlots(c.UserID)
+	}
+	bonus := wellRestedSlotBonus(restTier, pool)
+	tx, err := db.Get().Begin()
+	if err != nil {
+		return nil, err
+	}
+	defer tx.Rollback()
+	if _, err := tx.Exec(`DELETE FROM dnd_spell_slots WHERE user_id = ?`, string(c.UserID)); err != nil {
+		return nil, err
+	}
+	for lvl, total := range pool {
+		if _, err := tx.Exec(`
+			INSERT INTO dnd_spell_slots (user_id, slot_level, total, used)
+			VALUES (?, ?, ?, 0)`,
+			string(c.UserID), lvl, total+bonus[lvl]); err != nil {
+			return nil, err
+		}
+	}
+	if err := tx.Commit(); err != nil {
+		return nil, err
+	}
+	if len(bonus) == 0 {
+		return nil, nil
+	}
+	return bonus, nil
+}
+
 // partialRefreshSpellSlots restores spell slots on short rest. All L1 slots
 // come back, plus floor(charLevel/4) additional slots distributed
 // lowest-first across tiers ≥2. Returns slot_level→count restored so the