docs(masterplan): add council, religion, caste, and innovation scope

Update MASTERPLAN.md to reflect new systems added to milestones:
- M3: custom tenets/doctrines, expanded holy sites, Inquisitor
  holy order, Keeper Network secret society
- M4: council retheme + court positions, caste laws, innovation
  eras, legend suppression
- M5: band council with crew roles
- M7: advanced council interactions, post-endgame throne choice

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

MASTERPLAN.md

@@ -182,11 +182,22 @@ Use Sandbox decision to gain powers. All metallic arts events fire correctly.
     holy site building
   - **Pits of Hathsin** — atium generation, tyranny cost, built by Lord Ruler
   - **Conventical of Seran** — Inquisitor base, dread and martial bonuses
-- Polish religions:
-  - Steel Ministry: Lord Ruler as head, obligator hierarchy
-  - Terris Keepers: secret faith, forbidden knowledge mechanics
-  - Survivorism: hidden faith, rebellion bonuses
-  - Cult of Ruin: human sacrifice, Hemalurgy bonuses
+- Deep religion overhaul with custom tenets and doctrines:
+  - 12 custom tenets (3 per faith) replacing vanilla placeholders: Obligator
+    Hierarchy, Allomantic Oversight, Imperial Mandate (Steel Ministry); Keeper's
+    Vow, Metalmic Preservation, Worldbringer Mission (Terris); Kelsier's
+    Sacrifice, Hope in Ash, Underground Network (Survivorism); Hemalurgic Rites,
+    Embrace Destruction, Ruin's Whispers (Cult of Ruin)
+  - 2 custom doctrine groups: Allomantic Stance (Divine/Controlled/Forbidden),
+    Caste Doctrine (Divine Order/Irrelevant/Tool)
+  - Expanded holy sites (~10 total, differentiated by faith) with conditional
+    sites (Kelsier's Pyre activates on martyrdom, Well of Ascension on endgame)
+  - Terris Keepers: secret faith mechanics
+  - Survivorism: rebellion bonuses
+  - Cult of Ruin: Hemalurgy bonuses
+- Holy orders: Steel Inquisitor order (hireable MaA + individual Inquisitor
+  request mechanic with unique interactions) and Keeper Network (secret society
+  with joining, progression, coppermind sharing, Ministry discovery risk)
 - 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,
@@ -249,6 +260,20 @@ and Pits of Hathsin have special buildings. Names are Scadrial-appropriate.
   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 custom council system: retheme all 5 council positions (Obligator
+  Liaison, Hazemaster, House Comptroller, House Informant, Ministry Preceptor)
+  with 10 custom council tasks that interact with Lord Ruler attention, metal
+  supply, skaa unrest, and Allomantic trait systems. 7 custom court positions
+  (Royal Court): Terris Steward, Kandra Agent, Allomantic Advisor, Hazekiller
+  Captain, Obligator Witness, Court Smoker, Master of Revels. Each with
+  passive bonuses and special effects. Suppress/retheme vanilla positions.
+- Caste law system: 3-tier caste laws (Strict/Relaxed/Abolished) enforcing the
+  noble/skaa divide. Cross-caste consequence events (affair discovery, half-skaa
+  children, hidden heritage exposure). Post-rebellion law repeal pathway.
+- Cultural innovation system: "Age of the Lord Ruler" era (~8 pre-unlocked
+  innovations representing Imperial stagnation) and "Age of Liberation" era (~8
+  innovations locked until the Lord Ruler falls). Keeper Network accelerates
+  post-rebellion research. Vanilla eras fully suppressed.
 - Full testing pass — error.log review, 20-year playthrough, verify no vanilla
   anachronisms visible
 
@@ -256,12 +281,19 @@ and Pits of Hathsin have special buildings. Names are Scadrial-appropriate.
 - `localization/english/mistborn_titles_l_english.yml` — province renames
 - `common/casus_belli_types/` — new directory
 - `common/schemes/` — new directory
+- `common/council_positions/00_mistborn_council.txt` — rethemed council
+- `common/council_tasks/00_mistborn_council_tasks.txt` — custom tasks
+- `common/court_positions/00_mistborn_court_positions.txt` — court roles
+- `common/laws/00_mistborn_laws.txt` — caste laws
+- `common/culture/innovations/00_scadrial_innovations.txt` — custom eras
 - Province modifier definitions in `common/modifiers/`
-- `localization/english/` — new localization for CB, schemes, provinces
+- `localization/english/` — new localization for CB, schemes, provinces, council,
+  laws, innovations
 
 **Exit criteria:** A friend can install the mod and play. The world feels like
-Scadrial — Scadrial names, ash terrain, Mistborn mechanics, no vanilla
-anachronisms. Custom wars and schemes work.
+Scadrial — Scadrial names, ash terrain, Mistborn mechanics, caste system, no
+vanilla anachronisms. Custom wars, schemes, council, and laws work. Innovation
+system shows Imperial stagnation.
 
 ---
 
@@ -294,15 +326,24 @@ anachronisms. Custom wars and schemes work.
 - Non-DLC fallback: if Roads to Power not detected, Kelsier starts as landed
   minor lord of a Luthadel slum barony
 
+- Band council system: 7 crew roles (Crew Leader, Crew Second, Smoker,
+  Soother/Rioter, Tineye Scout, Enforcer, Infiltrator) with mechanical bonuses,
+  vacancy penalties when roles are unfilled, ~14 crew role events, and 5 band
+  tasks. Each crew member's Allomantic ability enhances their role. Default
+  assignments match the books (Clubs=Smoker, Ham=Enforcer, Vin=Infiltrator).
+
 **Key files:**
 - `common/bookmarks/00_mistborn_bookmarks.txt` — major rewrite
 - `common/decisions/` — crew decisions
 - `common/game_rules/` — activate toggle
+- `common/council_positions/01_crew_council.txt` — band council roles
+- `events/crew_role_events.txt` — crew role events
 - `events/` — crew-specific events
-- `localization/english/` — bookmark text, crew decisions
+- `localization/english/` — bookmark text, crew decisions, crew roles
 
 **Exit criteria:** Select "End of an Empire" bookmark. Play as Kelsier with
-crew. Recruit members. Game rule toggle works. If Kelsier dies, Vin takes over.
+crew. Crew roles assigned with mechanical effects. Recruit members. Game rule
+toggle works. If Kelsier dies, Vin takes over.
 
 ---
 
@@ -396,6 +437,12 @@ martyrdom. Vin takes over as leader. The core plot of Book 1 plays out.
   Gathering (secret Keeper conclave with coppermind sharing and Feruchemical
   training), Allomantic Exhibition (competitive Allomancer showcase — the
   Mistborn equivalent of a tournament).
+- Advanced council and court interactions (~25 events): kandra "Replace a
+  Courtier" interaction with discovery chain, Court Smoker protection against
+  enemy Seekers, Obligator Witness betrayal/loyalty events, Terris Steward
+  secret Keeper reveal, metal-type specific Allomantic Advisor events, council
+  composition synergy with Lord Ruler attention, crew council advanced events
+  (full crew meetings, role conflicts, role evolution).
 - Additional Sanderson lore events:
   - Terris breeding program (Lord Ruler's suppression of Feruchemy)
   - Obligator spy network flavor