Add prestige graph

core/prestige/README.md

@@ -2,29 +2,51 @@
 
 ## Overview
 
-The `prestige/` subfolder implements the rebirth/reset system. Players can reset progress in exchange for a permanent multiplier that accelerates future runs.
+The `prestige/` subfolder implements the rebirth/reset system and the prestige buff graph — permanent upgrades purchasable with prestige currency that persist across resets.
 
 ## Files
 
 | File | Purpose |
 |------|---------|
-| `prestige_config.gd` | Configuration resource for prestige rules |
-| `prestige_manager.gd` | Core logic and state management |
-| `prestige_panel.gd` | UI panel for prestige interaction |
-| `TECH_SPEC.md` | Detailed technical specification |
+| `prestige_config.gd` | Configuration resource for prestige rules (`PrestigeConfig`) |
+| `prestige_manager.gd` | Core prestige state, gain calculation, and reset orchestration (`PrestigeManager`) |
+| `prestige_buff_node.gd` | Single node in the prestige buff graph (`PrestigeBuffNode`) |
+| `prestige_buff_catalogue.gd` | Flat list of all prestige buff nodes (`PrestigeBuffCatalogue`) |
+| `prestige_buff_graph_tile.gd` | Individual tile UI for a buff node (`PrestigeBuffGraphTile`) |
+| `prestige_buff_graph_tile.tscn` | Tile scene (icon, name, effect, cost, state) |
+| `prestige_buff_graph_panel.gd` | Full-screen panel displaying the buff graph (`PrestigeBuffGraphPanel`) |
+| `prestige_panel.gd` | UI panel for prestige reset interaction (`PrestigePanel`) |
+| `prestige_panel.tscn` | Prestige panel scene |
+| `prestige_progress_bar.gd` | Progress bar toward next prestige threshold |
+| `prestige_progress_bar.tscn` | Progress bar scene |
+| `TECH_SPEC.md` | Detailed technical specification (historical design doc) |
 
 ## Architecture
 
 ```
-PrestigeManager (autoload node)
-├── Tracks prestige currency
-├── Calculates pending gain
-├── Applies multipliers to generators
-└── PrestigePanel (UI)
-	├── Shows current/pending prestige
-	└── Trigger reset button
+LevelGameState (Node)
+├── PrestigeManager (Node)
+│   ├── Tracks prestige currency & reset count
+│   ├── Calculates pending gain from config
+│   └── Orchestrates reset via GameState
+├── PrestigePanel (UI)
+│   ├── Shows current/pending prestige & multiplier
+│   └── Reset button with confirmation dialog
+├── PrestigeProgressBar (UI)
+│   └── Visual progress toward next threshold
+├── PrestigeBuffGraphPanel (UI)
+│   ├── Ascension currency balance
+│   └── Tiered rows of PrestigeBuffGraphTile nodes
+└── prestige_buff_catalogue (PrestigeBuffCatalogue)
+	└── Array of PrestigeBuffNode resources
 ```
 
+PrestigeManager is **not** an autoload — it is a child node of `LevelGameState`. The game state finds it via `find_child("PrestigeManager")` in `_ready()`.
+
+---
+
+# Part 1 — Prestige Reset System
+
 ## PrestigeConfig
 
 Resource defining prestige rules.
@@ -82,13 +104,14 @@ enum MultiplierMode {
 
 ## PrestigeManager
 
-Autoload node managing prestige state.
+Child node of `LevelGameState` managing prestige state.
 
 ### Signals
 
 ```gdscript
 signal prestige_state_changed(total_prestige, pending_gain)
 signal prestige_performed(gain, total_prestige)
+signal prestige_threshold_changed(next_threshold)
 ```
 
 ### State Variables
@@ -106,9 +129,11 @@ var run_peak_source_currency: BigNumber         # Peak this run
 ```gdscript
 # Query state
 func get_total_prestige() -> BigNumber
+func get_current_prestige_unspent() -> BigNumber
 func calculate_pending_gain() -> BigNumber
 func can_prestige() -> bool
 func get_total_multiplier() -> float
+func get_next_prestige_threshold() -> BigNumber
 
 # Perform prestige
 func perform_prestige() -> bool
@@ -171,20 +196,14 @@ multiplier = base_multiplier * (growth_base ^ total_prestige)
 
 1. Player clicks "Prestige" button
 2. `perform_prestige()` called
-3. Gain calculated and added to total:
-   - For ALL_CURRENCIES: sum of all tracked currencies is used
-   - For single-currency: source currency is used
-4. `GameState.reset_for_prestige()` called:
-   - Current currencies reset to 0
-   - Generator states cleared
-   - Buff levels reset to 0
-   - Goal completion cleared and re-initialized
-   - Lifetime totals preserved
-5. Run tracking reinitialized:
-   - For ALL_CURRENCIES: sum of all currencies at reset time
-   - For single-currency: source currency at reset time
-6. Generators reinitialized
-7. Save triggered
+3. Gain calculated and added to total
+4. Prestige currency granted via `game_state.add_currency_by_id()`
+5. `game_state.reset_for_prestige()` called (preserves prestige currency, resets generators, currencies, buff levels, goals)
+6. `_reset_all_buff_levels()` — clears generator buff levels (NOT prestige buff unlocks)
+7. Generator runtime state reinitialized
+8. Run tracking reinitialized
+9. `game_state.emit_currency_changed_for_all()` — triggers UI refresh
+10. Save triggered
 
 ## PrestigePanel
 
@@ -193,40 +212,39 @@ UI component for prestige interaction.
 ### Displays
 
 ```gdscript
-_total_value.text = "123.45"     # Total prestige earned
-_pending_value.text = "56.78"    # Gain available now
-_multiplier_value.text = "x2.34" # Current multiplier
-_basis_label.text = "Total Currency (1.50e6)"  # For ALL_CURRENCIES basis
-# Or: "Lifetime Total (1.50e6 Magic)"  # For LIFETIME_TOTAL basis
+_total_value.text       # Total prestige earned (e.g. "123.45")
+_pending_value.text     # Gain available now
+_multiplier_value.text  # Current multiplier (e.g. "x2.34")
+_basis_label.text       # Basis + value (e.g. "Total Currency (1.50e6)")
 ```
 
 ### Buttons
 
-- **Reset**: Triggers `perform_prestige()` after confirmation
+- **Reset**: Triggers `perform_prestige()` after confirmation dialog
 - **Save**: Manually saves game state
 
-## Integration with Generators
+## Generator Integration
 
-Generators apply prestige multipliers automatically:
+Generators apply prestige multipliers via `PrestigeManager.get_total_multiplier()`:
 
 ```gdscript
-func get_effective_auto_run_multiplier() -> float:
-	return run_multiplier * buff_multiplier * _get_prestige_multiplier()
-
 func _get_prestige_multiplier() -> float:
-	var manager = get_node_or_null("/root/PrestigeManager")
-	if manager:
-		return manager.get_total_multiplier()
+	var parent: Node = get_parent()
+	var prestige_manager: PrestigeManager = parent.find_child("PrestigeManager", true, false)
+	if prestige_manager:
+		return prestige_manager.get_total_multiplier()
 	return 1.0
 ```
 
+This is called from `get_effective_auto_run_multiplier()` alongside research and buff multipliers. In the future, prestige buff multipliers from the graph system will replace or augment this.
+
 ## Save Integration
 
-Prestige state stored in `GameState` external save:
+Prestige state stored in `LevelGameState` external save:
 
 ```json
 {
-  "prestige": {
+  "prestige_state": {
 	"total_prestige_earned": {"m": 10.0, "e": 0},
 	"current_prestige_unspent": {"m": 5.0, "e": 0},
 	"prestige_resets_count": 3,
@@ -242,56 +260,208 @@ Prestige state stored in `GameState` external save:
 For a typical idle game with single currency:
 
 ```gdscript
-# Primary prestige currency
 id = &"primary"
 display_name = "Ascension"
 source_currency_id = &"magic"
-
-# Based on lifetime total of Magic currency
 basis = LIFETIME_TOTAL
-
-# Need 1e6 Magic to get first prestige
 threshold_mantissa = 1.0
-threshold_exponent = 6
-
-# Square root scaling (diminishing returns)
+threshold_exponent = 6   # 1e6
 formula = POWER
-exponent = 0.5
-
-# +10% multiplier per prestige point
+exponent = 0.5           # Square root
 multiplier_mode = ADDITIVE
 multiplier_per_prestige = 0.10
 ```
 
-For multi-currency tracking (ALL_CURRENCIES):
+For multi-currency tracking (`ALL_CURRENCIES`):
 
 ```gdscript
 id = &"ascension"
 display_name = "Ascension"
 prestige_currency_id = &"ascension"
-
-# Track sum of ALL currencies (gold + wood + food + etc.)
 basis = ALL_CURRENCIES
-
-# Empty include_currency_ids means all currencies from catalog
-# Set specific IDs to track only those: include_currency_ids = [&"gold", &"wood"]
-include_currency_ids = []
-
-# Need 1e4 total currency sum to get first prestige
+include_currency_ids = []  # Empty = all currencies from catalogue
 threshold_mantissa = 1.0
-threshold_exponent = 4
-
-# Square root scaling
+threshold_exponent = 4     # 1e4
 formula = POWER
 exponent = 0.5
-
-# +5% multiplier per prestige point
 multiplier_mode = ADDITIVE
 multiplier_per_prestige = 0.05
 ```
 
-## See Also
+---
 
-- `core/level_game_state.gd` - State persistence
-- `core/generator/currency_generator.gd` - Multiplier application
-- `core/big_number.gd` - Large number math
+# Part 2 — Prestige Buff Graph
+
+## Overview
+
+The prestige buff graph is a permanent upgrade system where players spend prestige currency to unlock nodes in a DAG-structured graph. Unlike generator buffs (which reset on prestige), prestige buff unlocks are **permanent** and survive resets.
+
+## PrestigeBuffNode
+
+Single node in the graph. Each node is a one-shot unlock — either locked or unlocked, no repeatable levels.
+
+### EffectType Enum
+
+```gdscript
+enum EffectType {
+	CURRENCY_PRODUCTION_MULTIPLIER,  # Multiply currency output by x%
+	BUILDING_CREATION_BONUS,         # When a building is created, increase currency gain by x%
+	WORKER_THRESHOLD_MULTIPLIER,     # When 10+ workers are assigned to a building, increase currency gain by x%
+	CARRYOVER_BUILDINGS,             # After prestige, start with some buildings and workers already assigned
+	UNLOCK_AUTO_BUY_WORKER,          # Unlock option to auto-buy workers
+	HOVER_SPEED_BOOST,               # Hovering over a place speeds up workers instead of clicking
+	UNLOCK_BUILDING,                 # Unlock a new building (generator)
+	WORKER_PRODUCTIVITY,             # Increase worker productivity by x%
+	RESEARCH_XP_MULTIPLIER,          # Increase research XP gain by x%
+}
+```
+
+### Exported Fields
+
+| Field | Type | Notes |
+|-------|------|-------|
+| `id` | `StringName` | Unique node identifier |
+| `display_name` | `String` | UI label |
+| `description` | `String` (multiline) | Tooltip |
+| `icon` | `Texture2D` | Icon in graph UI |
+| `parent_ids` | `Array[StringName]` | Prerequisites (DAG — multiple parents allowed) |
+| `effect_type` | `EffectType` | What this buff does |
+| `effect_value` | `float` | Effect magnitude (multiplier or count depending on type) |
+| `target_id` | `StringName` | Target building/currency for type-specific effects (empty = global) |
+| `cost_mantissa` | `float` | Prestige currency cost mantissa |
+| `cost_exponent` | `int` | Prestige currency cost exponent |
+| `tier` | `int` | Row in graph UI (visual grouping) |
+| `x_position` | `float` | Column in graph UI |
+
+### Key Methods
+
+```gdscript
+func get_cost() -> BigNumber                        # BigNumber from mantissa/exponent
+func has_parents() -> bool                          # True if parent_ids is non-empty
+func all_parents_unlocked(unlocked: Dictionary) -> bool  # All prerequisites met?
+func is_valid() -> bool                             # Non-empty id and positive cost
+```
+
+## PrestigeBuffCatalogue
+
+Flat resource containing all buff nodes. The graph structure emerges from `parent_ids`.
+
+| Field | Type |
+|-------|------|
+| `nodes` | `Array[PrestigeBuffNode]` |
+
+### Key Methods
+
+```gdscript
+func get_node_by_id(id: StringName) -> PrestigeBuffNode
+func get_all_ids() -> Array[StringName]
+func get_root_nodes() -> Array[PrestigeBuffNode]    # Nodes with empty parent_ids
+func get_children_of(parent_id: StringName) -> Array[PrestigeBuffNode]
+```
+
+## State in LevelGameState
+
+```gdscript
+@export var prestige_buff_catalogue: PrestigeBuffCatalogue
+var _prestige_buff_unlocked: Dictionary = {}  # {StringName: bool} — node_id → unlocked
+```
+
+- Never cleared by `reset_for_prestige()` (unlike `_buff_levels` which IS cleared)
+- Normalized on load: missing catalogue node IDs are filled as `false`
+- On initialization, iterates the catalogue and sets any missing entries to `false`
+
+## LevelGameState API
+
+```gdscript
+# Purchase and query
+func purchase_prestige_buff(buff_id: StringName) -> bool
+func can_purchase_prestige_buff(buff_id: StringName) -> bool
+func is_prestige_buff_unlocked(buff_id: StringName) -> bool
+func get_prestige_buff_cost(buff_id: StringName) -> BigNumber
+func get_prestige_currency_id() -> StringName           # Returns &"ascension"
+
+# Multiplier computation — walks graph, returns combined product from unlocked nodes
+func get_prestige_buff_multiplier(effect_type: int, target_id: StringName = &"") -> float
+
+# Available nodes (prerequisites met, not yet unlocked)
+func get_available_prestige_buffs() -> Array[PrestigeBuffNode]
+```
+
+### Signal
+
+```gdscript
+signal prestige_buff_unlocked(buff_id: StringName)
+```
+
+Prestige currency balance changes use the existing `currency_changed` signal — no separate signal needed.
+
+## Purchase Flow
+
+```
+Player clicks unlock node
+  → can_purchase_prestige_buff(node_id)
+	→ Node exists in catalogue?
+	→ Not already unlocked?
+	→ All parent_ids unlocked?
+	→ Enough prestige currency?
+  → YES: spend_currency_by_id("ascension", cost)
+  → _prestige_buff_unlocked[node_id] = true
+  → emit prestige_buff_unlocked
+  → save_game()
+```
+
+## Multiplier Computation
+
+`get_prestige_buff_multiplier(effect_type, target_id)` iterates all unlocked nodes matching the given effect type and multiplies their `effect_value` together. Results start at `1.0`.
+
+- If `target_id` is empty: all matching nodes are included (global effect)
+- If `target_id` is set: only nodes with empty or matching `target_id` are included
+
+## Multiplier Usage In Generators
+
+Generators should call `get_prestige_buff_multiplier()` with their generator ID:
+
+```gdscript
+var asc_mult: float = game_state.get_prestige_buff_multiplier(
+	PrestigeBuffNode.EffectType.CURRENCY_PRODUCTION_MULTIPLIER,
+	get_generator_id()
+)
+```
+
+This replaces the old `_get_prestige_multiplier()` call for prestige buff-driven production bonuses.
+
+## Save Format
+
+- Save format version bumped to **8** when prestige buffs were introduced.
+- Key: `"prestige_buff_unlocked"` → array of unlocked node ID strings: `["gold_boost", "farm_boost"]`
+- Load deserialization reads the array, sets matching entries to `true`, then calls `_initialize_prestige_buffs()` to fill in missing entries as `false`.
+
+## UI — PrestigeBuffGraphPanel
+
+A `PanelContainer`-based separate screen.
+
+- **Layout**: Tiered rows (`HBoxContainer` per tier), sorted by `tier` then `x_position`
+- **Tiles** (`PrestigeBuffGraphTile`): show icon, name, effect description, cost, state
+- **States**:
+  - **Locked** (greyed out): prerequisites not met
+  - **Available** (highlighted, button enabled): all prerequisites met, can purchase
+  - **Unlocked** (green check, button disabled): already owned
+- **Balance**: Shows current prestige currency balance at top, refreshes on `currency_changed`
+- **Graph rebuild**: Rebuilds entire graph on `prestige_buff_unlocked` to reflect newly available children
+
+## Content Files
+
+Prestige buff content lives in `docs/gyms/tiny_sword/prestige/`:
+
+| File | Purpose |
+|------|---------|
+| `prestige_buff_catalogue.tres` | Catalogue resource referencing all buff nodes |
+| `prestige_buff_gold_boost.tres` | Example: +50% gold mine production |
+| `prestige_buff_farm_boost.tres` | Example: +50% farm food production |
+
+Each `.tres` is a `PrestigeBuffNode` resource with exported fields set in the inspector.
+
+## Prestige Reset And Buffs
+
+- **Generator buffs** (`_buff_levels`, `_buff_unlocked`, `_buff_active`): reset to 0/false on prestige
+- **Prestige buff unlocks** (`_prestige_buff_unlocked`): **never reset** — permanent across all prestige resets

core/prestige/prestige_buff_catalogue.gd

@@ -0,0 +1,40 @@
+## Flat list of all ascension buff nodes. The graph structure emerges from each node's parent_ids field.
+class_name PrestigeBuffCatalogue
+extends Resource
+
+@export var nodes: Array[PrestigeBuffNode] = []
+
+
+## Finds a node by its unique ID. Returns null if not found.
+func get_node_by_id(id: StringName) -> PrestigeBuffNode:
+	for node in nodes:
+		if node.id == id:
+			return node
+	return null
+
+
+## Returns all non-empty node IDs in the catalogue.
+func get_all_ids() -> Array[StringName]:
+	var ids: Array[StringName] = []
+	for node in nodes:
+		if node.id:
+			ids.append(node.id)
+	return ids
+
+
+## Returns all root nodes (nodes with no prerequisites).
+func get_root_nodes() -> Array[PrestigeBuffNode]:
+	var roots: Array[PrestigeBuffNode] = []
+	for node in nodes:
+		if node.parent_ids.is_empty():
+			roots.append(node)
+	return roots
+
+
+## Returns all nodes that list the given parent_id as a prerequisite.
+func get_children_of(parent_id: StringName) -> Array[PrestigeBuffNode]:
+	var children: Array[PrestigeBuffNode] = []
+	for node in nodes:
+		if node.parent_ids.has(parent_id):
+			children.append(node)
+	return children

core/prestige/prestige_buff_catalogue.gd.uid

@@ -0,0 +1 @@
+uid://bjcvnyh2bc6l5

core/prestige/prestige_buff_connection_overlay.gd

@@ -0,0 +1,44 @@
+## Draws bezier curves between connected PrestigeBuffGraphTile nodes in the graph panel.
+## Store pairs of tile references before calling queue_redraw().
+class_name PrestigeBuffConnectionOverlay
+extends Control
+
+## Pairs of [parent_tile, child_tile] to connect.
+var _connections: Array = []
+
+
+func _ready() -> void:
+	mouse_filter = Control.MOUSE_FILTER_IGNORE
+
+
+## Replace all connections and redraw.
+func set_connections(connections: Array) -> void:
+	_connections = connections
+	queue_redraw()
+
+
+func _draw() -> void:
+	if _connections.is_empty():
+		return
+
+	for pair in _connections:
+		var parent_tile: Control = pair[0] as Control
+		var child_tile: Control = pair[1] as Control
+		if parent_tile == null or child_tile == null:
+			continue
+
+		var from_pos: Vector2 = _tile_bottom_center(parent_tile)
+		var to_pos: Vector2 = _tile_top_center(child_tile)
+		draw_line(from_pos, to_pos, Color(0.6, 0.6, 0.7, 0.6), 2.0)
+
+
+func _tile_bottom_center(tile: Control) -> Vector2:
+	var rect: Rect2 = tile.get_global_rect()
+	var global_pos: Vector2 = Vector2(rect.position.x + rect.size.x * 0.5, rect.position.y + rect.size.y)
+	return get_global_transform().affine_inverse() * global_pos
+
+
+func _tile_top_center(tile: Control) -> Vector2:
+	var rect: Rect2 = tile.get_global_rect()
+	var global_pos: Vector2 = Vector2(rect.position.x + rect.size.x * 0.5, rect.position.y)
+	return get_global_transform().affine_inverse() * global_pos

core/prestige/prestige_buff_connection_overlay.gd.uid

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+uid://uv5lxj6hmpk

core/prestige/prestige_buff_graph_panel.gd

@@ -0,0 +1,85 @@
+## Separate-screen panel displaying the prestige buff graph.
+## Tiles are placed manually in the scene editor — each PrestigeBuffGraphTile has its PrestigeBuffNode
+## resource assigned directly. The panel manages the prestige currency balance display and
+## delegates connection-line drawing to a PrestigeBuffConnectionOverlay child.
+class_name PrestigeBuffGraphPanel
+extends PanelContainer
+
+@onready var _balance_label: Label = $MarginContainer/VBoxContainer/BalanceLabel
+@onready var _tiles_area: Control = $MarginContainer/VBoxContainer/TilesArea
+@onready var _close_button: Button = $MarginContainer/VBoxContainer/Header/CloseButton
+@onready var _connection_overlay: PrestigeBuffConnectionOverlay = $MarginContainer/VBoxContainer/TilesArea/ConnectionOverlay
+
+var _game_state: LevelGameState
+
+
+func _ready() -> void:
+	_game_state = find_parent("LevelGameState")
+	if _game_state == null:
+		push_error("PrestigeBuffGraphPanel: Could not find LevelGameState parent")
+		return
+
+	_game_state.currency_changed.connect(_on_currency_changed)
+	_close_button.pressed.connect(_on_close_pressed)
+
+	visibility_changed.connect(_on_visibility_changed)
+	_refresh_balance()
+
+
+## Rebuilds the connection overlay by scanning all PrestigeBuffGraphTile children and matching parent_ids.
+func _refresh_connections() -> void:
+	if _connection_overlay == null:
+		return
+
+	var tiles_by_id: Dictionary = {}
+	var all_tiles: Array[PrestigeBuffGraphTile] = []
+	_collect_tiles(_tiles_area, all_tiles)
+
+	for tile in all_tiles:
+		var node_id: StringName = tile.get_node_id()
+		if node_id != &"":
+			tiles_by_id[node_id] = tile
+
+	var connections: Array = []
+	for tile in all_tiles:
+		if tile.prestige_buff == null:
+			continue
+		for parent_id in tile.prestige_buff.parent_ids:
+			var parent_tile: PrestigeBuffGraphTile = tiles_by_id.get(parent_id, null)
+			if parent_tile:
+				connections.append([parent_tile, tile])
+
+	_connection_overlay.set_connections(connections)
+
+
+## Recursively collects all PrestigeBuffGraphTile nodes from a container.
+func _collect_tiles(from: Node, out_tiles: Array[PrestigeBuffGraphTile]) -> void:
+	for child in from.get_children():
+		if child is PrestigeBuffGraphTile:
+			out_tiles.append(child)
+		elif child is Container:
+			_collect_tiles(child, out_tiles)
+
+func _refresh_balance() -> void:
+	if _game_state == null:
+		_balance_label.text = "Prestige Currency: 0"
+		return
+
+	var currency_id: StringName = _game_state.get_prestige_currency_id()
+	var balance: BigNumber = _game_state.get_currency_amount_by_id(currency_id)
+	_balance_label.text = "Prestige Currency: %s" % balance.to_string_suffix(2)
+
+func _on_currency_changed(currency_id: StringName, _new_amount: BigNumber) -> void:
+	if currency_id == _game_state.get_prestige_currency_id():
+		_refresh_balance()
+
+func _on_close_pressed() -> void:
+	hide()
+
+func _on_visibility_changed() -> void:
+	if visible:
+		_refresh_balance()
+		_refresh_connections()
+
+func _on_prestige_buff_toggle_pressed() -> void:
+	show()

core/prestige/prestige_buff_graph_panel.gd.uid

@@ -0,0 +1 @@
+uid://n01pkakxllnj

core/prestige/prestige_buff_graph_tile.gd

@@ -0,0 +1,122 @@
+## Individual tile in the prestige buff graph UI.
+## Visually represents a single PrestigeBuffNode with locked/available/unlocked states.
+## The PrestigeBuffNode resource is assigned directly via the editor export.
+class_name PrestigeBuffGraphTile
+extends PanelContainer
+
+## The prestige buff node this tile represents. Set in the scene editor.
+@export var prestige_buff: PrestigeBuffNode
+
+@onready var _button: Button = $Button
+@onready var _icon: TextureRect = $Button/HBoxContainer/Icon
+@onready var _name_label: Label = $Button/HBoxContainer/VBoxContainer/NameLabel
+@onready var _effect_label: Label = $Button/HBoxContainer/VBoxContainer/EffectLabel
+@onready var _cost_label: Label = $Button/HBoxContainer/VBoxContainer/CostLabel
+@onready var _state_label: Label = $Button/HBoxContainer/StateLabel
+
+var _game_state: LevelGameState
+
+
+func _ready() -> void:
+	_game_state = find_parent("LevelGameState")
+	_button.pressed.connect(_on_button_pressed)
+
+	if _game_state:
+		_game_state.prestige_buff_unlocked.connect(_on_prestige_buff_unlocked)
+		_game_state.currency_changed.connect(_on_currency_changed)
+
+	if prestige_buff == null:
+		push_warning("PrestigeBuffGraphTile: prestige_buff is not set")
+		return
+
+	_refresh_visuals()
+	_refresh_state()
+
+
+func get_node_id() -> StringName:
+	if prestige_buff:
+		return prestige_buff.id
+	return &""
+
+
+func _refresh_visuals() -> void:
+	if prestige_buff == null:
+		return
+
+	_name_label.text = prestige_buff.display_name
+	_cost_label.text = "Cost: %s" % prestige_buff.get_cost().to_string_suffix(2)
+
+	if prestige_buff.icon:
+		_icon.texture = prestige_buff.icon
+
+	var effect_text: String = _format_effect_description()
+	_effect_label.text = effect_text
+	_effect_label.visible = not effect_text.is_empty()
+
+
+func _refresh_state() -> void:
+	if prestige_buff == null or _game_state == null:
+		return
+
+	var unlocked: bool = _game_state.is_prestige_buff_unlocked(prestige_buff.id)
+	var available: bool = _game_state.can_purchase_prestige_buff(prestige_buff.id)
+
+	if unlocked:
+		_state_label.text = "✓ Unlocked"
+		_button.disabled = true
+		modulate = Color.GREEN
+	elif available:
+		_state_label.text = "Available"
+		_button.disabled = false
+		modulate = Color.WHITE
+	else:
+		_state_label.text = "Locked"
+		_button.disabled = true
+		modulate = Color(0.5, 0.5, 0.5, 1.0)
+
+
+func _format_effect_description() -> String:
+	if prestige_buff == null:
+		return ""
+
+	match prestige_buff.effect_type:
+		PrestigeBuffNode.EffectType.CURRENCY_PRODUCTION_MULTIPLIER:
+			if prestige_buff.target_id != &"":
+				return "+%.0f%% %s production" % [((prestige_buff.effect_value - 1.0) * 100.0), prestige_buff.target_id]
+			return "+%.0f%% all production" % ((prestige_buff.effect_value - 1.0) * 100.0)
+		PrestigeBuffNode.EffectType.BUILDING_CREATION_BONUS:
+			return "+%.0f%% gain on build" % ((prestige_buff.effect_value - 1.0) * 100.0)
+		PrestigeBuffNode.EffectType.WORKER_THRESHOLD_MULTIPLIER:
+			return "+%.0f%% with 10+ workers" % ((prestige_buff.effect_value - 1.0) * 100.0)
+		PrestigeBuffNode.EffectType.CARRYOVER_BUILDINGS:
+			return "Keep %d buildings on prestige" % int(prestige_buff.effect_value)
+		PrestigeBuffNode.EffectType.UNLOCK_AUTO_BUY_WORKER:
+			return "Unlock auto-buy worker"
+		PrestigeBuffNode.EffectType.HOVER_SPEED_BOOST:
+			return "Hover to speed up workers"
+		PrestigeBuffNode.EffectType.UNLOCK_BUILDING:
+			return "Unlock %s building" % prestige_buff.target_id
+		PrestigeBuffNode.EffectType.WORKER_PRODUCTIVITY:
+			return "+%.0f%% worker productivity" % ((prestige_buff.effect_value - 1.0) * 100.0)
+		PrestigeBuffNode.EffectType.RESEARCH_XP_MULTIPLIER:
+			return "+%.0f%% research XP" % ((prestige_buff.effect_value - 1.0) * 100.0)
+		_:
+			return ""
+
+
+func _on_button_pressed() -> void:
+	if _game_state and prestige_buff:
+		_game_state.purchase_prestige_buff(prestige_buff.id)
+
+
+func _on_prestige_buff_unlocked(buff_id: StringName) -> void:
+	if prestige_buff and buff_id == prestige_buff.id:
+		_refresh_state()
+
+
+func _on_currency_changed(currency_id: StringName, _new_amount: BigNumber) -> void:
+	if _game_state == null or prestige_buff == null:
+		return
+	var asc_id: StringName = _game_state.get_prestige_currency_id()
+	if currency_id == asc_id:
+		_refresh_state()

core/prestige/prestige_buff_graph_tile.gd.uid

@@ -0,0 +1 @@
+uid://w8ogrp1s6qsf

core/prestige/prestige_buff_graph_tile.tscn

@@ -0,0 +1,40 @@
+[gd_scene format=3 uid="uid://bqk8rwia7lpbg"]
+
+[ext_resource type="Script" uid="uid://w8ogrp1s6qsf" path="res://core/prestige/prestige_buff_graph_tile.gd" id="1_script"]
+
+[node name="AscensionBuffGraphTile" type="PanelContainer" unique_id=582396224]
+custom_minimum_size = Vector2(220, 100)
+script = ExtResource("1_script")
+
+[node name="Button" type="Button" parent="." unique_id=34096996]
+layout_mode = 2
+
+[node name="HBoxContainer" type="HBoxContainer" parent="Button" unique_id=760838153]
+layout_mode = 0
+
+[node name="Icon" type="TextureRect" parent="Button/HBoxContainer" unique_id=2086768939]
+custom_minimum_size = Vector2(48, 48)
+layout_mode = 2
+size_flags_horizontal = 0
+
+[node name="VBoxContainer" type="VBoxContainer" parent="Button/HBoxContainer" unique_id=1701436193]
+layout_mode = 2
+size_flags_horizontal = 3
+
+[node name="NameLabel" type="Label" parent="Button/HBoxContainer/VBoxContainer" unique_id=334883451]
+layout_mode = 2
+text = "Buff Name"
+
+[node name="EffectLabel" type="Label" parent="Button/HBoxContainer/VBoxContainer" unique_id=1416390723]
+layout_mode = 2
+text = "+10% effect"
+
+[node name="CostLabel" type="Label" parent="Button/HBoxContainer/VBoxContainer" unique_id=983468527]
+layout_mode = 2
+text = "Cost: 0"
+
+[node name="StateLabel" type="Label" parent="Button/HBoxContainer" unique_id=629071282]
+layout_mode = 2
+size_flags_horizontal = 0
+text = "Locked"
+horizontal_alignment = 2

core/prestige/prestige_buff_node.gd

@@ -0,0 +1,69 @@
+## A single node in the prestige buff graph.
+## Each node represents a permanent upgrade that persists across prestige resets and is purchased with prestige currency.
+class_name PrestigeBuffNode
+extends Resource
+
+enum EffectType {
+	CURRENCY_PRODUCTION_MULTIPLIER,  ## Multiply currency output by x%
+	BUILDING_CREATION_BONUS,         ## When a building is created, increase currency gain by x%
+	WORKER_THRESHOLD_MULTIPLIER,     ## When 10+ workers are assigned to a building, increase currency gain by x%
+	CARRYOVER_BUILDINGS,             ## After prestige, start with some buildings and workers already assigned
+	UNLOCK_AUTO_BUY_WORKER,          ## Unlock option to auto-buy workers
+	HOVER_SPEED_BOOST,               ## Hovering over a place speeds up workers instead of clicking
+	UNLOCK_BUILDING,                  ## Unlock a new building (generator)
+	WORKER_PRODUCTIVITY,             ## Increase worker productivity by x%
+	RESEARCH_XP_MULTIPLIER,          ## Increase research XP gain by x%
+}
+
+## Unique node identifier.
+@export var id: StringName = &""
+## UI display label.
+@export var display_name: String = ""
+## Tooltip / description text.
+@export_multiline var description: String = ""
+## Icon shown in the graph UI.
+@export var icon: Texture2D
+## Prerequisite node IDs that must be unlocked before this node becomes available.
+@export var parent_ids: Array[StringName] = []
+## What kind of effect this buff provides.
+@export var effect_type: EffectType = EffectType.CURRENCY_PRODUCTION_MULTIPLIER
+## Magnitude of the effect (interpreted per effect type).
+@export var effect_value: float = 1.0
+## Target generator, building, or currency ID for type-specific effects. Empty means global.
+@export var target_id: StringName = &""
+## Prestige currency cost mantissa (combined with cost_exponent for BigNumber).
+@export var cost_mantissa: float = 1.0
+## Prestige currency cost exponent (combined with cost_mantissa for BigNumber).
+@export var cost_exponent: int = 0
+## Visual tier / row in the graph UI.
+@export var tier: int = 0
+## Visual column / horizontal position in the graph UI.
+@export var x_position: float = 0.0
+
+
+## Builds and returns the fixed prestige currency cost as a BigNumber.
+func get_cost() -> BigNumber:
+	return BigNumber.new(cost_mantissa, cost_exponent)
+
+
+## Returns true if this node has any prerequisite parent nodes.
+func has_parents() -> bool:
+	return not parent_ids.is_empty()
+
+
+## Checks whether all prerequisites are unlocked in the provided dictionary.
+## [param unlocked] maps node_id (StringName) → bool (true if unlocked).
+func all_parents_unlocked(unlocked: Dictionary) -> bool:
+	for parent_id in parent_ids:
+		if not bool(unlocked.get(parent_id, false)):
+			return false
+	return true
+
+
+## Returns true if this node has valid required data (non-empty id, positive cost).
+func is_valid() -> bool:
+	if id == &"":
+		return false
+	if cost_mantissa <= 0.0:
+		return false
+	return true

core/prestige/prestige_buff_node.gd.uid

@@ -0,0 +1 @@
+uid://mjyig8xlgki0

core/prestige/prestige_manager.gd

@@ -24,7 +24,7 @@ const FORMULA_TRIANGULAR_INVERSE: int = 1
 const MULTIPLIER_MODE_ADDITIVE: int = 0
 const MULTIPLIER_MODE_MULTIPLICATIVE_POWER: int = 1
 
-@export var config: Resource
+@export var config: PrestigeConfig
 @export var game_state: LevelGameState
 
 var total_prestige_earned: BigNumber = BigNumber.from_float(0.0)
@@ -36,7 +36,7 @@ var last_reset_time: int = 0
 
 func _ready() -> void:
 	if config == null:
-		config = load("res://docs/gyms/tiny_sword/prestige/primary_prestige.tres") as Resource
+		config = load("res://docs/gyms/tiny_sword/prestige/primary_prestige.tres") as PrestigeConfig
 
 	if not _is_config_valid():
 		push_warning("PrestigeManager has invalid or missing config; prestige is disabled.")
@@ -58,7 +58,7 @@ func _ready() -> void:
 	prestige_state_changed.emit(get_total_prestige(), calculate_pending_gain())
 	prestige_threshold_changed.emit(get_next_prestige_threshold())
 
-func get_config() -> Resource:
+func get_config() -> PrestigeConfig:
 	return config
 
 func get_source_currency_id() -> StringName:
@@ -110,7 +110,7 @@ func get_total_multiplier() -> float:
 		return 1.0
 
 	var base: float = maxf(_get_config_float("base_multiplier", 1.0), 0.0)
-	var prestige_value: float = _big_number_to_float(total_prestige_earned)
+	var prestige_value: float = total_prestige_earned.to_float()
 	if prestige_value <= 0.0:
 		return base
 
@@ -209,7 +209,7 @@ func get_next_prestige_threshold() -> BigNumber:
 		BASIS_RUN_TOTAL, BASIS_ALL_CURRENCIES:
 			return _get_config_threshold()
 		_:
-			var current_total: float = _big_number_to_float(total_prestige_earned)
+			var current_total: float = total_prestige_earned.to_float()
 			var next_target: float = _calculate_target_for_prestige(current_total + 1.0)
 			return BigNumber.from_float(next_target)
 
@@ -260,7 +260,7 @@ func _calculate_target_for_prestige(prestige_level: float) -> float:
 	if config == null:
 		return 0.0
 	
-	var threshold_value: float = _big_number_to_float(_get_config_threshold())
+	var threshold_value: float = _get_config_threshold().to_float()
 	if threshold_value <= 0.0:
 		return 0.0
 	
@@ -289,11 +289,11 @@ func _calculate_raw_gain_float(basis_value: BigNumber) -> float:
 
 	match _get_config_int("formula", FORMULA_POWER):
 		FORMULA_TRIANGULAR_INVERSE:
-			var threshold_value: float = _big_number_to_float(_get_config_threshold())
+			var threshold_value: float = _get_config_threshold().to_float()
 			if threshold_value <= 0.0:
 				return 0.0
 
-			var basis_float: float = _big_number_to_float(basis_value)
+			var basis_float: float = basis_value.to_float()
 			if basis_float <= 0.0:
 				return 0.0
 
@@ -303,7 +303,7 @@ func _calculate_raw_gain_float(basis_value: BigNumber) -> float:
 
 			var target_total: float = (sqrt(1.0 + 8.0 * k) - 1.0) * 0.5
 			if _is_cumulative_basis():
-				return target_total - _big_number_to_float(total_prestige_earned)
+				return target_total - total_prestige_earned.to_float()
 			return target_total
 		_:
 			var ratio: float = _big_number_ratio_to_float(basis_value, _get_config_threshold())
@@ -312,7 +312,7 @@ func _calculate_raw_gain_float(basis_value: BigNumber) -> float:
 
 			var value: float = maxf(_get_config_float("scale", 0.0), 0.0) * pow(ratio, maxf(_get_config_float("exponent", 0.0001), 0.0001)) + _get_config_float("flat_bonus", 0.0)
 			if _is_cumulative_basis():
-				return value - _big_number_to_float(total_prestige_earned)
+				return value - total_prestige_earned.to_float()
 			return value
 
 func _get_basis_value() -> BigNumber:
@@ -449,9 +449,11 @@ func _reset_all_buff_levels() -> void:
 	if game_state == null:
 		return
 
-	for buff_id in game_state._buff_levels.keys():
-		game_state.set_buff_level(buff_id, 0)
-		game_state.set_buff_unlocked(buff_id, false)
+	for buff in game_state.get_all_buffs():
+		if buff == null:
+			continue
+		game_state.set_buff_level(buff.id, 0)
+		game_state.set_buff_unlocked(buff.id, false)
 
 func _reinitialize_generators_after_prestige_reset() -> void:
 	var scene_root: Node = get_tree().current_scene
@@ -489,14 +491,7 @@ func _big_number_ratio_to_float(a: BigNumber, b: BigNumber) -> float:
 
 	return (a.mantissa / b.mantissa) * pow(10.0, float(exponent_delta))
 
-func _big_number_to_float(value: BigNumber) -> float:
-	if value.mantissa <= 0.0:
-		return 0.0
-	if value.exponent > 308:
-		return INF
-	if value.exponent < -308:
-		return 0.0
-	return value.mantissa * pow(10.0, float(value.exponent))
+
 
 func _normalize_currency_id(currency_id: StringName) -> StringName:
 	var normalized: String = String(currency_id).to_lower().strip_edges()
@@ -514,35 +509,18 @@ func _to_non_negative_int(value: Variant, fallback: int = 0) -> int:
 func _is_config_valid() -> bool:
 	if config == null:
 		return false
-	if not config.has_method("is_valid"):
-		return false
-
-	return bool(config.call("is_valid"))
+	return config.is_valid()
 
 func _is_cumulative_basis() -> bool:
-	if config != null and config.has_method("is_cumulative_basis"):
-		return bool(config.call("is_cumulative_basis"))
-	
 	var basis_type: int = _get_config_int("basis", BASIS_LIFETIME_TOTAL)
-	
 	return basis_type != BASIS_RUN_TOTAL and basis_type != BASIS_ALL_CURRENCIES
 
 func _round_gain(value: float) -> float:
-	if config != null and config.has_method("round_value"):
-		var rounded: Variant = config.call("round_value", value)
-		if rounded is float:
-			return rounded
-		if rounded is int:
-			return float(rounded)
-
-	return floorf(value)
+	return config.round_value(value)
 
 func _get_config_threshold() -> BigNumber:
-	if config != null and config.has_method("get_threshold"):
-		var threshold: Variant = config.call("get_threshold")
-		if threshold is BigNumber:
-			return threshold
-
+	if config != null:
+		return config.get_threshold()
 	return BigNumber.from_float(1.0)
 
 func _get_config_string_name(property_name: String, fallback: StringName = &"") -> StringName:

core/prestige/prestige_progress_bar.gd

@@ -30,8 +30,7 @@ func _on_game_state_ready() -> void:
 		return
 	
 	if config == null:
-		if _manager.has_method("get_config"):
-			config = _manager.get_config()
+		config = _manager.get_config()
 	
 	if config == null:
 		push_warning("PrestigeProgressBar '%s' has no config; progress bar disabled." % String(name))
@@ -57,14 +56,11 @@ func _update_progress() -> void:
 	if _manager == null or config == null:
 		return
 	
-	_basis_value = _manager.call("get_basis_value_for_display")
-	if _manager.has_method("get_next_prestige_threshold"):
-		_next_threshold = _manager.call("get_next_prestige_threshold")
-	else:
-		_next_threshold = _get_threshold_from_config()
+	_basis_value = _manager.get_basis_value_for_display()
+	_next_threshold = _manager.get_next_prestige_threshold()
 	
-	var basis_float: float = _big_number_to_float(_basis_value)
-	var threshold_float: float = _big_number_to_float(_next_threshold)
+	var basis_float: float = _basis_value.to_float()
+	var threshold_float: float = _next_threshold.to_float()
 	
 	if threshold_float > 0.0 and basis_float >= 0.0:
 		var ratio: float = minf(basis_float / threshold_float, 1.0)
@@ -74,25 +70,3 @@ func _update_progress() -> void:
 	
 	_label_start.text = _basis_value.to_string_suffix(2)
 	_label_end.text = _next_threshold.to_string_suffix(2)
-
-func _get_threshold_from_config() -> BigNumber:
-	if config == null:
-		return BigNumber.from_float(0.0)
-	
-	if not config.has_method("get_threshold"):
-		return BigNumber.from_float(0.0)
-	
-	var threshold = config.call("get_threshold")
-	if threshold is BigNumber:
-		return threshold
-	
-	return BigNumber.from_float(0.0)
-
-func _big_number_to_float(value: BigNumber) -> float:
-	if value.mantissa <= 0.0:
-		return 0.0
-	if value.exponent > 308:
-		return INF
-	if value.exponent < -308:
-		return 0.0
-	return value.mantissa * pow(10.0, float(value.exponent))