Scenario strategic identity (not only numeric modifiers) (#98)

data/scenarios.json

@@ -44,12 +44,12 @@
       },
       "maxBeaconParts": 5,
       "survivalWinAfterDay": 45,
-      "modifiers": { "eventGateSkipAbove": 52 }
+      "modifiers": { "eventGateSkipAbove": 52, "dailyPowerDelta": 3 }
     },
     {
       "id": "silent_colony",
       "name": "Silent Colony",
-      "description": "Isolated start; trader signals need a Radio Tower on the air.",
+      "description": "Isolated start; trader signals need a Radio Tower on the air. Supply runs cost more — earn the antenna.",
       "starting": {
         "power": 60,
         "food": 58,
@@ -59,12 +59,13 @@
         "populationCap": 10
       },
       "maxBeaconParts": 5,
-      "survivalWinAfterDay": 45
+      "survivalWinAfterDay": 45,
+      "modifiers": { "dailyCreditsIncomeDelta": -8 }
     },
     {
       "id": "beacon_rush",
       "name": "Beacon Rush",
-      "description": "Finish the Signal Beacon in 3 parts instead of 5.",
+      "description": "Finish the Signal Beacon in 3 parts instead of 5. Supply runners are motivated — credits flow faster.",
       "starting": {
         "power": 65,
         "food": 60,
@@ -74,7 +75,8 @@
         "populationCap": 10
       },
       "maxBeaconParts": 3,
-      "survivalWinAfterDay": 45
+      "survivalWinAfterDay": 45,
+      "modifiers": { "dailyCreditsIncomeDelta": 7 }
     }
   ],
   "difficulties": [

docs/balance.md

@@ -79,3 +79,24 @@ Override the minimum locally with `MIN_GAME_COVERAGE=85 ./scripts/check-game-cov
 ## Building daily production
 
 `data/buildings.json` may include `dailyEffects` (per-level per day). `advanceDay` applies them **before** power/food upkeep and morale drift (`applyBuildingProduction` in `internal/game/tick.go`). One-time build bonuses stay in `effects`.
+
+## Scenarios — strategic identity
+
+Each non-standard scenario has a situational mechanic that rewards a distinct opener.
+
+| Scenario | Strategic hook | Good opener |
+|----------|----------------|-------------|
+| **Dust Season** | Extra `dailyPowerDelta: +3` drain from regolith storms; higher event frequency (`eventGateSkipAbove: 52`). Power buffer depletes 3× faster, and damaged buildings halve output. | Build solar array first, repair aggressively rather than saving credits. The `dust_season_power_buffer.json` script demonstrates this. |
+| **Silent Colony** | `dailyCreditsIncomeDelta: -8` — supply runs arrive sporadically until the radio is on air. Credit flow is tight until a Radio Tower is built (which also unlocks `trader_arrives` events). | Radio Tower early, before a second hydro or solar upgrade. `silent_colony_radio_first.json` demonstrates the cost/benefit. |
+| **Beacon Rush** | `maxBeaconParts: 3` and `dailyCreditsIncomeDelta: +7` — motivated supply runners. You can reach a win-beacon faster without grinding Hydro L3, because the credit income more than offsets skipping one food upgrade. | Skip Hydro/Solar L3 and divert credits to beacon work. The standard `beacon_rush.json` still validates this path. |
+| **First Landing** | Onboarding cushion — extra credits and slightly better morale/food. No strategic hook; same viable openers as Standard Run. |
+
+### Scenario simulate scripts
+
+```bash
+# Dust Season — solar-first, repair-heavy opener
+outpost -simulate scripts/dust_season_power_buffer.json -seeds 1,7,42
+
+# Silent Colony — radio tower early
+outpost -simulate scripts/silent_colony_radio_first.json -seeds 1,7,42
+```

internal/game/baseline.go

@@ -29,6 +29,7 @@ type BaselineOutcome struct {
 type BaselineStrategy struct {
 	ID             string
 	ScriptFile     string
+	ScenarioID     string // empty = "standard"
 	MinEndDay      int
 	RequireAlive   bool
 	MinBeaconParts int
@@ -42,6 +43,8 @@ func ReferenceStrategies() []BaselineStrategy {
 		noTradeSurvivalBaseline(),
 		beaconRushBaseline(),
 		survival45Baseline(),
+		dustSeasonPowerBufferBaseline(),
+		silentColonyRadioFirstBaseline(),
 	}
 }
 
@@ -136,6 +139,44 @@ func beaconRushBaseline() BaselineStrategy {
 	}
 }
 
+func dustSeasonPowerBufferBaseline() BaselineStrategy {
+	return BaselineStrategy{
+		ID:           "dust_season_power_buffer",
+		ScriptFile:   "dust_season_power_buffer.json",
+		ScenarioID:   "dust_season",
+		MinEndDay:    6,
+		RequireAlive: true,
+		Expected: map[int64]BaselineOutcome{
+			1:                   {Day: 6, GameOver: false, Won: false, BeaconParts: 0},
+			7:                   {Day: 6, GameOver: false, Won: false, BeaconParts: 0},
+			42:                  {Day: 6, GameOver: false, Won: false, BeaconParts: 0},
+			99:                  {Day: 6, GameOver: false, Won: false, BeaconParts: 0},
+			100:                 {Day: 6, GameOver: false, Won: false, BeaconParts: 0},
+			101:                 {Day: 6, GameOver: false, Won: false, BeaconParts: 0},
+			1779403310247544000: {Day: 6, GameOver: false, Won: false, BeaconParts: 0},
+		},
+	}
+}
+
+func silentColonyRadioFirstBaseline() BaselineStrategy {
+	return BaselineStrategy{
+		ID:           "silent_colony_radio_first",
+		ScriptFile:   "silent_colony_radio_first.json",
+		ScenarioID:   "silent_colony",
+		MinEndDay:    6,
+		RequireAlive: true,
+		Expected: map[int64]BaselineOutcome{
+			1:                   {Day: 6, GameOver: false, Won: false, BeaconParts: 0},
+			7:                   {Day: 6, GameOver: false, Won: false, BeaconParts: 0},
+			42:                  {Day: 6, GameOver: false, Won: false, BeaconParts: 0},
+			99:                  {Day: 6, GameOver: false, Won: false, BeaconParts: 0},
+			100:                 {Day: 6, GameOver: false, Won: false, BeaconParts: 0},
+			101:                 {Day: 6, GameOver: false, Won: false, BeaconParts: 0},
+			1779403310247544000: {Day: 6, GameOver: false, Won: false, BeaconParts: 0},
+		},
+	}
+}
+
 func survival45Baseline() BaselineStrategy {
 	winDay := SurvivalWinAfterDay + 1
 	win := BaselineOutcome{Day: winDay, GameOver: true, Won: true, BeaconParts: 0}

internal/game/baseline_test.go

@@ -34,7 +34,14 @@ func TestBalanceBaseline_ReferenceStrategies(t *testing.T) {
 
 			for _, seed := range ReferenceSeeds {
 				t.Run(seedLabel(seed), func(t *testing.T) {
-					final, err := Simulate(content, seed, script.Actions)
+					var final State
+					var err error
+					if strategy.ScenarioID != "" {
+						setup := RunSetup{Seed: seed, ScenarioID: strategy.ScenarioID}
+						final, err = SimulateRun(content, setup, script.Actions)
+					} else {
+						final, err = Simulate(content, seed, script.Actions)
+					}
 					if err != nil {
 						t.Fatalf("Simulate: %v", err)
 					}

internal/game/day_advance.go

@@ -11,7 +11,7 @@ func (s *State) advanceDay() {
 }
 
 func (s *State) applyDailyUpkeep() {
-	s.Power -= DailyPowerUpkeep(s.Population)
+	s.Power -= DailyPowerUpkeep(s.Population) + s.DailyPowerDelta
 	s.Food -= DailyFoodUpkeep(s.Population)
 	s.Credits += s.dailyCreditsIncome()
 }

internal/game/scenario.go

@@ -23,6 +23,7 @@ type StartingResources struct {
 type RunModifiers struct {
 	EventGateSkipAbove      int `json:"eventGateSkipAbove,omitempty"`
 	DailyCreditsIncomeDelta int `json:"dailyCreditsIncomeDelta,omitempty"`
+	DailyPowerDelta         int `json:"dailyPowerDelta,omitempty"`
 }
 
 // ScenarioDef is a selectable run profile from data/scenarios.json.
@@ -133,6 +134,7 @@ func mergeRunModifiers(base, overlay RunModifiers) RunModifiers {
 		out.EventGateSkipAbove = overlay.EventGateSkipAbove
 	}
 	out.DailyCreditsIncomeDelta += overlay.DailyCreditsIncomeDelta
+	out.DailyPowerDelta += overlay.DailyPowerDelta
 	return out
 }
 
@@ -217,6 +219,7 @@ func NewRun(content Content, profiles RunProfiles, seed int64, scenarioID, diffi
 		s.EventGateSkipAbove = mods.EventGateSkipAbove
 	}
 	s.DailyCreditsIncomeDelta = mods.DailyCreditsIncomeDelta
+	s.DailyPowerDelta = mods.DailyPowerDelta
 
 	s.Seed = seed
 	s.rngDrawMods = nil

internal/game/scenario_test.go

@@ -63,3 +63,44 @@ func testRunProfiles() RunProfiles {
 	}
 	return p
 }
+
+func TestDustSeason_DailyPowerDrainHigherThanStandard(t *testing.T) {
+	std := NewRun(testContent(), testRunProfiles(), 1, "standard", "normal")
+	dust := NewRun(testContent(), testRunProfiles(), 1, "dust_season", "normal")
+	if dust.DailyPowerDelta <= std.DailyPowerDelta {
+		t.Fatalf("dust_season DailyPowerDelta %d want > standard %d", dust.DailyPowerDelta, std.DailyPowerDelta)
+	}
+}
+
+func TestSilentColony_LowerDailyCredits(t *testing.T) {
+	std := NewRun(testContent(), testRunProfiles(), 1, "standard", "normal")
+	silent := NewRun(testContent(), testRunProfiles(), 1, "silent_colony", "normal")
+	if silent.DailyCreditsIncomeDelta >= std.DailyCreditsIncomeDelta {
+		t.Fatalf("silent_colony DailyCreditsIncomeDelta %d want < standard %d", silent.DailyCreditsIncomeDelta, std.DailyCreditsIncomeDelta)
+	}
+}
+
+func TestBeaconRush_HigherDailyCredits(t *testing.T) {
+	std := NewRun(testContent(), testRunProfiles(), 1, "standard", "normal")
+	br := NewRun(testContent(), testRunProfiles(), 1, "beacon_rush", "normal")
+	if br.DailyCreditsIncomeDelta <= std.DailyCreditsIncomeDelta {
+		t.Fatalf("beacon_rush DailyCreditsIncomeDelta %d want > standard %d", br.DailyCreditsIncomeDelta, std.DailyCreditsIncomeDelta)
+	}
+}
+
+func TestDustSeason_PowerDrainAppliedEachDay(t *testing.T) {
+	std := NewRun(testContent(), testRunProfiles(), 1, "standard", "normal")
+	dust := NewRun(testContent(), testRunProfiles(), 1, "dust_season", "normal")
+	// remove rng to avoid event noise
+	std.rngDrawMods = []int{99, 99, 99}
+	dust.rngDrawMods = []int{99, 99, 99}
+	stdPower := std.Power
+	dustPower := dust.Power
+	std.NextDay()
+	dust.NextDay()
+	stdDrain := stdPower - std.Power
+	dustDrain := dustPower - dust.Power
+	if dustDrain <= stdDrain {
+		t.Fatalf("dust_season power drain %d want > standard %d", dustDrain, stdDrain)
+	}
+}

internal/game/types.go

@@ -72,6 +72,7 @@ type State struct {
 	SurvivalWinAfterDay   int
 	EventGateSkipAbove    int
 	DailyCreditsIncomeDelta int
+	DailyPowerDelta         int
 	Content        Content
 	SessionLog     Recorder
 	Seed           int64

scripts/dust_season_power_buffer.json

@@ -0,0 +1,16 @@
+{
+  "scenario": "dust_season",
+  "description": "Dust Season opener: solar first for power buffer, repair aggressively, skip hydro upgrade until power is stable.",
+  "actions": [
+    { "type": "build", "building_id": "solar_array" },
+    { "type": "build", "building_id": "hydroponics" },
+    { "type": "next_day" },
+    { "type": "repair" },
+    { "type": "next_day" },
+    { "type": "repair" },
+    { "type": "next_day" },
+    { "type": "next_day" },
+    { "type": "repair" },
+    { "type": "next_day" }
+  ]
+}

scripts/silent_colony_radio_first.json

@@ -0,0 +1,13 @@
+{
+  "scenario": "silent_colony",
+  "description": "Silent Colony opener: radio tower early to unlock trader events and restore credit income before economy stalls.",
+  "actions": [
+    { "type": "build", "building_id": "solar_array" },
+    { "type": "next_day" },
+    { "type": "next_day" },
+    { "type": "next_day" },
+    { "type": "build", "building_id": "radio_tower" },
+    { "type": "next_day" },
+    { "type": "next_day" }
+  ]
+}