docs(masterplan): expand scope with metal supply, artifacts, lifestyles, and activities

Add new systems across milestones: metal supply and scarcity (M2),
Royal Court artifact system with 9 core types (M3), 5 custom
Mistborn lifestyles replacing vanilla (~75 perks/events each), and
rethemed activities including multi-phase Noble Ball (M5). Also adds
stretch-goal artifacts (~20 types) and 8 Mistborn-specific activities
to M7.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

MASTERPLAN.md

@@ -18,7 +18,8 @@ Fall of Kredik Shaw — on a custom Scadrial map with custom art, polished
 balance, and clean error logs. Alternatively, they can flip to Sandbox Mode and
 play any house lord with full metallic arts mechanics.
 
-**DLC dependency:** Roads to Power (unlanded adventurer band system).
+**DLC dependencies:** Roads to Power (unlanded adventurer band system), Royal
+Court (artifact system).
 
 ---
 
@@ -116,6 +117,10 @@ rule appears in setup screen. Play a landed noble for 5 years without crashes.
 - Validate Compounding — yearly pulse detection, correct trait pair matching,
   compounder modifier balanced
 - Add savant consequences (negative effects for `trait_allomantic_savant`)
+- Add metal supply and scarcity system — Allomantic power depends on access to
+  metals. Noble houses maintain reserves (gold cost), skaa use black markets
+  (risk of discovery). Supply modifiers (abundant/low/depleted) affect combat
+  stats. Wartime consumption, depletion events, resupply decisions.
 - Balance men-at-arms types (Hazekillers, Koloss, Mistborn Agents) — damage,
   toughness, cost, terrain modifiers
 - Polish existing event files — complete stub events in `hemalurgy_events.txt`,
@@ -184,6 +189,11 @@ Use Sandbox decision to gain powers. All metallic arts events fire correctly.
   - Cult of Ruin: human sacrifice, Hemalurgy bonuses
 - Add kandra trait and kandra Contract mechanics (kandra characters are
   shapeshifters bound by Contracts)
+- Create artifact system (Royal Court DLC) with 9 core types: mistcloaks,
+  metal vial sets, glass/obsidian weapons, dueling canes, koloss swords,
+  copperminds, metalmind sets, Lord Ruler's atium bracers (unique legendary),
+  Inquisitor spike sets. Crafting decisions, equipment restrictions by trait,
+  starting artifacts for canonical characters.
 
 **Key files:**
 - `history/characters/00_mistborn_characters.txt` — major rewrite
@@ -228,6 +238,17 @@ and Pits of Hathsin have special buildings. Names are Scadrial-appropriate.
   - Noble Infiltration (spy on a house via balls and agents)
   - Raid House Vault (steal gold, reduce control)
   - False Flag (hostile action that frames a third party)
+- Replace all 5 vanilla lifestyles with Mistborn-themed ones: Metallic Arts
+  (Allomantic Mastery / Feruchemical Study / Hemalurgic Research), Noble
+  Intrigue (Ball Culture / House Espionage / Contract & Commerce), Steel
+  Ministry (Obligator's Path / Inquisition / Canton Authority), Underground
+  (Crew Leadership / Guerrilla Warfare / Shadow Network), Scholarship
+  (Keeper's Path / Metallurgic Theory / Imperial History). ~75 perks, ~75
+  lifestyle events, full perk trees with synergies to other mod systems.
+- Replace/retheme vanilla activities: suppress pilgrimage/tournament/grand tour,
+  retheme feast (Noble Banquet), hunt (Mist Patrol), wedding (House Alliance
+  Ceremony). Promote Noble Ball to full multi-phase activity (7 phases: guest
+  selection through departure, with Allomantic interactions at every phase).
 - Full testing pass — error.log review, 20-year playthrough, verify no vanilla
   anachronisms visible
 
@@ -356,6 +377,25 @@ martyrdom. Vin takes over as leader. The core plot of Book 1 plays out.
     history, coppermind mechanics
   - Kandra Contracts — deepen kandra mechanics, impersonation events, Contract
     obligations
+- Rare and lore-extrapolated artifacts (~20 additional types): lerasium beads
+  (consumable, transforms user into Mistborn), Alendi's logbook (reveals Lord
+  Ruler origins), lord_ruler_metal_plates, individual metalminds (gold, pewter,
+  zinc, bronze, tin), noble house items (seal rings, contract portfolios, ball
+  finery, keep blueprints), Allomantic gear (upgraded bandoliers, tin
+  spectacles, bronze detection charms, emotional allomancy journals, pewter
+  training weights), Steel Ministry items (obsidian axes, writs of authority,
+  tattoo kits), skaa underground items (rebellion banner, crew toolkit,
+  network map, preserved flower), Terris items (worldbringer robes, prophecy
+  scrolls). Artifact discovery events, looting integration, metalmind
+  tapping/recharging cycle.
+- 8 Mistborn-specific activities: Atium Auction (multi-round bidding for the
+  atium contract), Crew Heist (multi-phase job with Allomantic crew roles),
+  Steel Inquisitor Tribunal (tense heresy trial), Mistborn Night Raid (tactical
+  keep assault), Skaa Underground Rally (secret rebel gathering with betrayal
+  risk), Pits of Hathsin Expedition (atium mining death trap), Terris Synod
+  Gathering (secret Keeper conclave with coppermind sharing and Feruchemical
+  training), Allomantic Exhibition (competitive Allomancer showcase — the
+  Mistborn equivalent of a tournament).
 - Additional Sanderson lore events:
   - Terris breeding program (Lord Ruler's suppression of Feruchemy)
   - Obligator spy network flavor