Phased agentic build: an idle RPG in Rust + Yew/WebAssembly on the PR #23 head

(empty crate dir)

wrote Cargo.toml: 560 chars, 22 lines

wrote Trunk.toml: 44 chars, 3 lines

wrote index.html: 473 chars, 17 lines

wrote docs/mechanics.md: 6165 chars, 98 lines

edited docs/mechanics.md: -173 +5242 chars; file is now 192 lines

wrote src/core/rng.rs: 2864 chars, 107 lines

wrote src/core/stats.rs: 9200 chars, 292 lines

ERROR: `old` occurs 0 times in src/core/stats.rs (must be exactly 1)

edited src/core/stats.rs: -94 +122 chars; file is now 292 lines

wrote src/core/balance.rs: 14094 chars, 412 lines

wrote src/core/mod.rs: 177 chars, 9 lines

wrote src/core/battle.rs: 430 chars, 17 lines

wrote src/core/events.rs: 261 chars, 12 lines

wrote src/core/shop.rs: 273 chars, 10 lines

wrote src/core/save.rs: 318 chars, 13 lines

wrote src/main.rs: 665 chars, 23 lines

exit=101
Updating crates.io index
     Locking 112 packages to latest compatible versions
      Adding getrandom v0.2.17 (available: v0.4.3)
      Adding gloo v0.11.0 (available: v0.12.0)
      Adding gloo-storage v0.3.0 (available: v0.4.0)
      Adding gloo-timers v0.3.0 (available: v0.4.0)
      Adding rand v0.8.8 (available: v0.10.2)
      Adding rand_chacha v0.3.1 (available: v0.10.0)
      Adding yew v0.21.0 (available: v0.23.0)
   Compiling emberfall v0.1.0 (/home/zerc/rpgbench/game)
error[E0433]: cannot find module or crate `emberfall_core` in this scope
  --> src/main.rs:11:16
   |
11 |     let rows = emberfall_core::balance::balance_table();
   |                ^^^^^^^^^^^^^^ use of unresolved module or unlinked crate `emberfall_core`
   |
   = help: if you wanted to use a crate named `emberfall_core`, use `cargo add emberfall_core` to add it to your `Cargo.toml`

error[E0433]: cannot find module or crate `emberfall_core` in this scope
  --> src/main.rs:12:18
   |
12 |     let points = emberfall_core::balance::balance_points(&rows);
   |                  ^^^^^^^^^^^^^^ use of unresolved module or unlinked crate `emberfall_core`
   |
   = help: if you wanted to use a crate named `emberfall_core`, use `cargo add emberfall_core` to add it to your `Cargo.toml`

error[E0433]: cannot find module or crate `emberfall_core` in this scope
  --> src/main.rs:13:18
   |
13 |     print!("{}", emberfall_core::balance::format_table(&rows, &points));
   |                  ^^^^^^^^^^^

edited src/main.rs: -549 +556 chars; file is now 25 lines

ERROR: `old` occurs 0 times in src/main.rs (must be exactly 1)

src/main.rs: 25 lines, showing 1-25
    1| //! EMBERFALL entry point.
    2| //! Native: prints the balance table (the graded contract). wasm32: Yew app (phase 2+).
    3| 
    4| mod core;
    5| 
    6| #[cfg(target_arch = "wasm32")]
    7| fn main() {
    8|     // Yew mount lands here in phase 2; the core rules are already compiled in.
    9| }
   10| 
   11| #[cfg(not(target_arch = "wasm32"))]
   12| fn main() {
   13|     let rows = crate::r#core::balance::balance_table();
   14|     let points = crate::r#core::balance::balance_points(&rows);
   15|     print!("{}", crate::r#core::balance::format_table(&rows, &points));
   16| }
   17| 
   18| #[cfg(test)]
   19| mod tests {
   20|     #[test]
   21|     fn native_table_is_populated() {
   22|         let rows = crate::r#core::balance::balance_table();
   23|         assert_eq!(rows.len(), 9);
   24|     }
   25| }

edited src/main.rs: -9 +37 chars; file is now 26 lines

exit=101
Compiling emberfall v0.1.0 (/home/zerc/rpgbench/game)
warning: named argument `level` is not used by name
   --> src/core/balance.rs:355:79
    |
355 |         let _ = writeln!(out, "  level {:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                        -----                                  ^^^^^ this named argument is referred to by position in formatting string
    |                                        |
    |                                        this formatting argument uses named argument `level` by position
    |
    = note: `#[warn(named_arguments_used_positionally)]` on by default
help: use the named argument by name to avoid ambiguity
    |
355 |         let _ = writeln!(out, "  level {level:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                         +++++

error: invalid suffix `MB3R_1234_5678` for number literal
  --> src/core/rng.rs:12:31
   |
12 | pub const BALANCE_SEED: u64 = 0x_EMB3R_1234_5678;
   |                               ^^^^^^^^^^^^^^^^^^ invalid suffix `MB3R_1234_5678`
   |
   = help: the suffix must be one of the numeric types (`u32`, `isize`, `f32`, etc.)

error[E0631]: type mismatch in function arguments
   --> src/core/balance.rs:149:39
    |
149 |     let max = v.iter().fold(f32::MIN, f32::max);
    |                        ----           ^^^^^^^^
    |                        |              |
    |                        |              expected due to this
 

edited src/core/rng.rs: -291 +437 chars; file is now 109 lines

edited src/core/balance.rs: -93 +111 chars; file is now 412 lines

src/core/mod.rs: 9 lines, showing 1-9
    1| //! Game core. No web/yew dependencies here — this is the rules engine.
    2| 
    3| pub mod balance;
    4| pub mod battle;
    5| pub mod events;
    6| pub mod rng;
    7| pub mod save;
    8| pub mod shop;
    9| pub mod stats;

src/core/battle.rs: 17 lines, showing 1-17
    1| //! Turn-based idle battle. Stub for phase 1; formulas live in `stats`/`balance`.
    2| 
    3| use serde::{Deserialize, Serialize};
    4| 
    5| #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
    6| pub enum Side {
    7|     Hero,
    8|     Enemy,
    9| }
   10| 
   11| /// Placeholder combatant record; fleshed out in phase 2.
   12| #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
   13| pub struct Combatant {
   14|     pub name: String,
   15|     pub side: Side,
   16|     pub hp: f32,
   17| }

src/core/shop.rs: 10 lines, showing 1-10
    1| //! Weapon/armor generation, potions, pricing. Stub for phase 1 (pricing lives in `balance`).
    2| 
    3| use serde::{Deserialize, Serialize};
    4| 
    5| #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
    6| pub struct Item {
    7|     pub name: String,
    8|     pub power: u32,
    9|     pub price: u32,
   10| }

src/core/events.rs: 12 lines, showing 1-12
    1| //! Random travel events and CHA-gated companions. Stub for phase 1.
    2| 
    3| use serde::{Deserialize, Serialize};
    4| 
    5| #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
    6| pub enum Event {
    7|     Treasure,
    8|     Ambush,
    9|     Shrine,
   10|     Merchant,
   11|     Stranger,
   12| }

src/core/save.rs: 13 lines, showing 1-13
    1| //! SaveGame (serde, versioned, 3 slots). Stub for phase 1.
    2| 
    3| use serde::{Deserialize, Serialize};
    4| 
    5| /// Version stamp written into every slot.
    6| pub const SAVE_VERSION: u32 = 1;
    7| 
    8| #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
    9| pub struct SaveGame {
   10|     pub version: u32,
   11|     pub slot: u32,
   12|     pub seed: u64,
   13| }

src/core/rng.rs: 109 lines, showing 1-109
    1| //! Seeded deterministic randomness. The ONLY source of randomness in the game.
    2| //!
    3| //! Every combat roll, shop restock and event draw goes through [`Rng`], which wraps a
    4| //! `rand_chacha::ChaCha8Rng` seeded from the active save slot (or a fixed seed in tests) so
    5| //! that replays and tests are bit-identical.
    6| 
    7| use rand::RngCore;
    8| use rand::SeedableRng;
    9| use serde::{Deserialize, Serialize};
   10| 
   11| /// Fixed seed used by the balance table and every deterministic test.
   12| pub const BALANCE_SEED: u64 = 0x5B4E_3F12_3456_78AB;
   13| 
   14| /// Deterministic PRNG handle passed explicitly through core code.
   15| /// The stream is intentionally NOT serialised: saves persist the `seed` and rebuild the
   16| /// generator, so a loaded game replays deterministically from the same seed.
   17| #[derive(Debug, Clone)]
   18| pub struct Rng {
   19|     inner: rand_chacha::ChaCha8Rng,
   20| }
   21| 
   22| impl Default for Rng {
   23|     fn default() -> Self {
   24|         Self::new(BALANCE_SEED)
   25|     }
   26| }
   27| 
   28| impl Rng {
   29|     /// Seed from any u64 (save slots use their slot index mixed with the creation time).
   30|     pub fn new(seed: u64) -> Self {
   31|         Self {
   32|             inner: rand_chacha::ChaCha8Rng::seed_from_u64(seed),
   33|         }
   34|     }
   35| 
   36|     /// Raw u32 draw.
   37|     #[inline]
   38|  

Cargo.toml: 22 lines, showing 1-22
    1| [package]
    2| name = "emberfall"
    3| version = "0.1.0"
    4| edition = "2021"
    5| 
    6| [[bin]]
    7| name = "emberfall"
    8| path = "src/main.rs"
    9| 
   10| [dependencies]
   11| yew = { version = "0.21", features = ["csr"] }
   12| gloo = "0.11"
   13| gloo-storage = "0.3"
   14| gloo-timers = { version = "0.3", features = ["futures"] }
   15| serde = { version = "1", features = ["derive"] }
   16| serde_json = "1"
   17| wasm-bindgen = "0.2"
   18| web-sys = { version = "0.3", features = ["Window", "Document", "HtmlElement", "Storage", "Performance"] }
   19| js-sys = "0.3"
   20| rand = "0.8"
   21| rand_chacha = "0.3"
   22| getrandom = { version = "0.2", features = ["js"] }

src/main.rs: 26 lines, showing 1-26
    1| //! EMBERFALL entry point.
    2| //! Native: prints the balance table (the graded contract). wasm32: Yew app (phase 2+).
    3| 
    4| #[path = "core/mod.rs"]
    5| pub mod core;
    6| 
    7| #[cfg(target_arch = "wasm32")]
    8| fn main() {
    9|     // Yew mount lands here in phase 2; the core rules are already compiled in.
   10| }
   11| 
   12| #[cfg(not(target_arch = "wasm32"))]
   13| fn main() {
   14|     let rows = crate::r#core::balance::balance_table();
   15|     let points = crate::r#core::balance::balance_points(&rows);
   16|     print!("{}", crate::r#core::balance::format_table(&rows, &points));
   17| }
   18| 
   19| #[cfg(test)]
   20| mod tests {
   21|     #[test]
   22|     fn native_table_is_populated() {
   23|         let rows = crate::r#core::balance::balance_table();
   24|         assert_eq!(rows.len(), 9);
   25|     }
   26| }

wrote src/core/battle.rs: 19269 chars, 484 lines

wrote src/core/shop.rs: 12609 chars, 340 lines

wrote src/core/events.rs: 9367 chars, 230 lines

wrote src/core/save.rs: 7045 chars, 192 lines

exit=1
error: unexpected argument '|' found

Usage: cargo test [OPTIONS] [TESTNAME] [-- [ARGS]...]

For more information, try '--help'.

exit=101
Compiling emberfall v0.1.0 (/home/zerc/rpgbench/game)
error[E0425]: cannot find type `Primary` in module `crate::core::stats`
   --> src/core/shop.rs:104:38
    |
104 |     Stat { stat: crate::core::stats::Primary, rare: bool },
    |                                      ^^^^^^^ not found in `crate::core::stats`

warning: named argument `level` is not used by name
   --> src/core/balance.rs:355:79
    |
355 |         let _ = writeln!(out, "  level {:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                        -----                                  ^^^^^ this named argument is referred to by position in formatting string
    |                                        |
    |                                        this formatting argument uses named argument `level` by position
    |
    = note: `#[warn(named_arguments_used_positionally)]` on by default
help: use the named argument by name to avoid ambiguity
    |
355 |         let _ = writeln!(out, "  level {level:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                         +++++

warning: unused import: `Class`
  --> src/core/battle.rs:17:26
   |
17 | use crate::core::stats::{Class, Character, Derived};
   |                          ^^^^^
   |
   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default

warning: unused imports: `Deserialize` and `Serialize`
 --> src/core/rng.rs:9:13
  |
9 | use serde::{Deserialize, Serialize};

edited src/core/shop.rs: -239 +375 chars; file is now 342 lines

edited src/core/shop.rs: -240 +246 chars; file is now 342 lines

edited src/core/shop.rs: -34 +0 chars; file is now 342 lines

[READ BUDGET EXCEEDED (9 reads > 8): showing at most 120 lines. Files you already read this phase are still in your context unless you changed them; the orientation packet at the start holds the focus files in full. Prefer editing and running verify.]
src/core/shop.rs: 342 lines, showing 92-111
   92| /// A potion the shop can stock. The two `Stat` variants are the spec's deliberate pair:
   93| /// one is cheap but rare, the other expensive but common.
   94| #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
   95| pub enum Potion {
   96|     /// Restore 45% of `max_hp`.
   97|     Hp,
   98|     /// Restore 50% of `max_mp`.
   99|     Mp,
  100|     /// `+pct` (e.g. 0.25) to one derived stat for `turns` turns (buff potions last `BUFF_TURNS`).
  101|     Buff { stat: AffixTarget, pct: f32, turns: u32 },
  102|     /// Permanently +1 to one primary stat (STR/WILL/CON/DEX/INT/CHA). `rare` picks which of the
  103|     /// two economy variants this is: rare-cheap (25g, ~6% of visits) or common-expensive
  104|     /// (240g, ~55% of visits). The primary is named as a string so `shop.rs` does not depend on
  105|     /// a `stats::Primary` type that does not exist yet.
  106|     
  107| }
  108| 
  109| impl Potion {
  110|     /// Price for this potion (fixed, no CHA discount).
  111|     pub fn price(&self) -> u32 {

edited src/core/shop.rs: -156 +193 chars; file is now 342 lines

rs files: 9
MODULE WIRING: undeclared .rs files: none; files shadowed by an inline `mod x {}` stub: none
cargo test: exit 101; 11/44 pass; failing: ['core::battle::tests::auto_potion_rules_trigger', 'core::battle::tests::companion_effect_applies_then_expires', 'core::battle::tests::every_location_boss_is_bearable_at_reference_levels', 'core::battle::tests::different_seeds_diverge', 'core::battle::tests::four_locations_each_with_3_mobs_and_a_boss', 'core::battle::tests::respawn_keeps_90_percent_of_gold', 'core::battle::tests::same_seed_replays_identical_battle_log', 'core::battle::tests::turn_order_follows_speed', 'core::battle::tests::wave1_enemy_dies_to_level1_hero_of_every_class', 'core::events::tests::companion_leaves_after_2_to_3_turns', 'core::events::tests::event_rolls_are_deterministic', 'core::events::tests::events_only_roll_on_the_interval', 'core::events::tests::events_roll_with_documented_probabilities', 'core::events::tests::gold_bonus_applies_only_while_following', 'core::events::tests::stranger_joins_iff_cha_meets_threshold', 'core::events::tests::stranger_table_matches_documented_thresholds', 'core::save::tests::empty_slot_is_not_a_run', 'core::save::tests::new_game_gives_60_stat_points', 'core::save::tests::round_trip_is_lossless_for_all_three_slots', 'core::save::tests::version_mismatch_is_reported', 'core::shop::tests::cannot_buy_without_gold', 'core::save::tests::new_game_is_seeded_deterministically', 'core::shop::tests::buying_pays_the_discounted_price', '

exit=0
warning: named argument `level` is not used by name
   --> src/core/balance.rs:355:79
    |
355 |         let _ = writeln!(out, "  level {:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                        -----                                  ^^^^^ this named argument is referred to by position in formatting string
    |                                        |
    |                                        this formatting argument uses named argument `level` by position
    |
    = note: `#[warn(named_arguments_used_positionally)]` on by default
help: use the named argument by name to avoid ambiguity
    |
355 |         let _ = writeln!(out, "  level {level:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                         +++++

warning: unused import: `Class`
  --> src/core/battle.rs:17:26
   |
17 | use crate::core::stats::{Class, Character, Derived};
   |                          ^^^^^
   |
   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default

warning: unused imports: `Deserialize` and `Serialize`
 --> src/core/rng.rs:9:13
  |
9 | use serde::{Deserialize, Serialize};
  |             ^^^^^^^^^^^  ^^^^^^^^^

warning: unused variable: `index`
   --> src/core/battle.rs:148:17
    |
148 | pub fn location(index: usize) -> Location {
    |                 ^^^^^ help: if this is intentional, prefix it with an underscore: `_index`
    |
    = note: `#[warn(unused_variables)]` (part of `

src/core/rng.rs: 109 lines, showing 1-109
    1| //! Seeded deterministic randomness. The ONLY source of randomness in the game.
    2| //!
    3| //! Every combat roll, shop restock and event draw goes through [`Rng`], which wraps a
    4| //! `rand_chacha::ChaCha8Rng` seeded from the active save slot (or a fixed seed in tests) so
    5| //! that replays and tests are bit-identical.
    6| 
    7| use rand::RngCore;
    8| use rand::SeedableRng;
    9| use serde::{Deserialize, Serialize};
   10| 
   11| /// Fixed seed used by the balance table and every deterministic test.
   12| pub const BALANCE_SEED: u64 = 0x5B4E_3F12_3456_78AB;
   13| 
   14| /// Deterministic PRNG handle passed explicitly through core code.
   15| /// The stream is intentionally NOT serialised: saves persist the `seed` and rebuild the
   16| /// generator, so a loaded game replays deterministically from the same seed.
   17| #[derive(Debug, Clone)]
   18| pub struct Rng {
   19|     inner: rand_chacha::ChaCha8Rng,
   20| }
   21| 
   22| impl Default for Rng {
   23|     fn default() -> Self {
   24|         Self::new(BALANCE_SEED)
   25|     }
   26| }
   27| 
   28| impl Rng {
   29|     /// Seed from any u64 (save slots use their slot index mixed with the creation time).
   30|     pub fn new(seed: u64) -> Self {
   31|         Self {
   32|             inner: rand_chacha::ChaCha8Rng::seed_from_u64(seed),
   33|         }
   34|     }
   35| 
   36|     /// Raw u32 draw.
   37|     #[inline]
   38|  

docs/mechanics.md: 192 lines, showing 1-192
    1| # EMBERFALL — mechanic math (phase 1, authoritative)
    2| 
    3| All numbers below are implemented in exactly two places: `src/core/stats.rs` (stat formulas,
    4| level-ups, class tables) and `src/core/balance.rs` (enemy scaling, boss multipliers, shop power
    5| growth + pricing, the balance measure). `src/core/rng.rs` is the only randomness source. Nothing
    6| in `core/` may touch web/yew.
    7| 
    8| Conventions: `f32` for stats and damage, `u32` for gold/levels/turns. All growth terms are written
    9| as `base + perLevel * (level - 1)` so a level-1 character uses exactly the base value.
   10| 
   11| ## 1. Primary stats
   12| 
   13| Six primaries: `STR, WILL, CON, DEX, INT, CHA`.
   14| 
   15| * Every class **starts at level 1 with a total of 60** primary points (`PRIMARY_TOTAL = 60`).
   16| * Every level-up grants **`POINTS_PER_LEVEL = 3`** points, distributed by the class *growth
   17|   weights* (integers summing to 3, so the totals stay exact and integral at every level).
   18| * `CHA` is a primary stat like any other: it gates companion checks, event outcomes and feeds the
   19|   shop discount (§7). It never enters damage maths.
   20| 
   21| ### Class base tables (level 1, total = 60) and growth weights (sum = 3)
   22| 
   23| | Class   | STR | WILL | CON | DEX | INT | CHA | Σ  | growth weights (STR/WILL/CON/DEX/INT/CHA) |
   24| |---------|----:|-----:|----:|----:|----:|----:|---:|--------

src/core/balance.rs: 412 lines, showing 1-400
    1| //! Class balance model + the balance table (docs/mechanics.md §5, §9).
    2| //!
    3| //! The graded measure: expected turns-to-kill the current location's boss, and the fraction of
    4| //! max HP left when it dies, at levels 1 / 10 / 25, each with the best gear affordable from a
    5| //! fixed gold budget. The three classes must land within ±10% of each other on both numbers at
    6| //! every reference point, and nobody may die.
    7| 
    8| use serde::{Deserialize, Serialize};
    9| 
   10| use crate::core::rng::{Rng, BALANCE_SEED};
   11| use crate::core::stats::{damage_formula, Class, Character, Derived};
   12| 
   13| /// Reference levels the balance test is evaluated at.
   14| pub const REFERENCE_LEVELS: [u32; 3] = [1, 10, 25];
   15| 
   16| /// Gold budget available at each reference level (paired with REFERENCE_LEVELS).
   17| pub const BUDGETS: [u32; 3] = [260, 1400, 6000];
   18| 
   19| /// Location index per reference level: Ember Fields, Ashen Woods, Cinder Mines.
   20| pub const REFERENCE_LOCATIONS: [usize; 3] = [0, 1, 2];
   21| 
   22| /// Location tier (1..4) per reference level.
   23| pub const REFERENCE_TIERS: [u32; 3] = [1, 2, 3];
   24| 
   25| /// Location display names, index-aligned with `REFERENCE_LOCATIONS`.
   26| pub const LOCATION_NAMES: [&str; 4] = [
   27|     "Ember Fields",
   28|     "Ashen Woods",
   29|     "Cinder Mines",
   30|     "Obsidian Keep",
   31| ];
   32| 
 

src/core/battle.rs: 484 lines, showing 180-299
  180|     pub cleared: bool,
  181|     /// `true` when the hero died at any point.
  182|     pub hero_died: bool,
  183|     /// Hero HP as a fraction of `max_hp` at the end of the fight.
  184|     pub hp_left: f32,
  185|     /// Gold awarded for kills this fight (before any death penalty).
  186|     pub gold_earned: u32,
  187| }
  188| 
  189| /// Whose turn it is / what the step resolved to.
  190| #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
  191| pub struct Step {
  192|     /// Events produced by this single turn, in resolution order.
  193|     pub events: Vec<BattleEvent>,
  194|     /// `true` once the fight is over (cleared or hero dead); further `step` calls are no-ops.
  195|     pub done: bool,
  196| }
  197| 
  198| /// The live fight. Owned by `save::Player::battle` and driven by the UI timer.
  199| #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
  200| pub struct BattleState {
  201|     /// Current location index (0..4).
  202|     pub location: usize,
  203|     /// True for the location's boss fight (activates the double-action rule and the
  204|     /// opening buff-potion rule).
  205|     pub is_boss: bool,
  206|     /// Initiative order: hero + companions + enemies, sorted descending by speed, stable.
  207|     pub order: Vec<usize>,
  208|     /// All combatants. `order` indexes into this.
  209|     pub combatants: Vec<Combatant>,
  210|     /// Turn counter, 1-based o

wrote src/core/battle.rs: 42869 chars, 1080 lines

exit=1
error: unexpected argument '2>&1' found

Usage: cargo check [OPTIONS]

For more information, try '--help'.

exit=101
Checking emberfall v0.1.0 (/home/zerc/rpgbench/game)
error[E0425]: cannot find value `crit` in this scope
   --> src/core/battle.rs:509:30
    |
509 | ...                   (crit, dmg)
    |                        ^^^^ not found in this scope

error[E0425]: cannot find value `dmg` in this scope
   --> src/core/battle.rs:509:36
    |
509 | ...                   (crit, dmg)
    |                              ^^^ not found in this scope

warning: named argument `level` is not used by name
   --> src/core/balance.rs:355:79
    |
355 |         let _ = writeln!(out, "  level {:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                        -----                                  ^^^^^ this named argument is referred to by position in formatting string
    |                                        |
    |                                        this formatting argument uses named argument `level` by position
    |
    = note: `#[warn(named_arguments_used_positionally)]` on by default
help: use the named argument by name to avoid ambiguity
    |
355 |         let _ = writeln!(out, "  level {level:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                         +++++

warning: unused import: `Class`
  --> src/core/battle.rs:16:42
   |
16 | use crate::core::stats::{damage_formula, Class, Character, Derived};
   |                                          ^^^^^
   |
   = note: `#[warn(unused_imports)]` (part of `#[

wrote src/core/battle.rs: 36748 chars, 991 lines

src/core/rng.rs: 109 lines, showing 1-109
    1| //! Seeded deterministic randomness. The ONLY source of randomness in the game.
    2| //!
    3| //! Every combat roll, shop restock and event draw goes through [`Rng`], which wraps a
    4| //! `rand_chacha::ChaCha8Rng` seeded from the active save slot (or a fixed seed in tests) so
    5| //! that replays and tests are bit-identical.
    6| 
    7| use rand::RngCore;
    8| use rand::SeedableRng;
    9| use serde::{Deserialize, Serialize};
   10| 
   11| /// Fixed seed used by the balance table and every deterministic test.
   12| pub const BALANCE_SEED: u64 = 0x5B4E_3F12_3456_78AB;
   13| 
   14| /// Deterministic PRNG handle passed explicitly through core code.
   15| /// The stream is intentionally NOT serialised: saves persist the `seed` and rebuild the
   16| /// generator, so a loaded game replays deterministically from the same seed.
   17| #[derive(Debug, Clone)]
   18| pub struct Rng {
   19|     inner: rand_chacha::ChaCha8Rng,
   20| }
   21| 
   22| impl Default for Rng {
   23|     fn default() -> Self {
   24|         Self::new(BALANCE_SEED)
   25|     }
   26| }
   27| 
   28| impl Rng {
   29|     /// Seed from any u64 (save slots use their slot index mixed with the creation time).
   30|     pub fn new(seed: u64) -> Self {
   31|         Self {
   32|             inner: rand_chacha::ChaCha8Rng::seed_from_u64(seed),
   33|         }
   34|     }
   35| 
   36|     /// Raw u32 draw.
   37|     #[inline]
   38|  

src/core/stats.rs: 292 lines, showing 1-292
    1| //! Primary stats, class tables, derived-stat formulas and level-ups.
    2| //! This is the single home of the stat math (see docs/mechanics.md §1-§4).
    3| 
    4| use serde::{Deserialize, Serialize};
    5| 
    6| /// Total primary stat points every class owns at level 1 (per-class budget; 60 each).
    7| pub const PRIMARY_TOTAL: u32 = 180;
    8| /// Primary points granted per level-up, distributed by class growth weights.
    9| pub const POINTS_PER_LEVEL: u32 = 3;
   10| 
   11| /// Caps / coefficients for the derived formulas (docs/mechanics.md §2).
   12| pub const EVAD_CAP: f32 = 0.35;
   13| pub const CRIT_CAP: f32 = 0.45;
   14| pub const CRIT_BASE: f32 = 0.02;
   15| pub const STAFF_FALLBACK: f32 = 0.45;
   16| 
   17| /// The six primary stats.
   18| #[derive(Debug, Clone, Copy, PartialEq, Eq, Default, Serialize, Deserialize)]
   19| pub struct Stats {
   20|     pub str: u32,
   21|     pub will: u32,
   22|     pub con: u32,
   23|     pub dex: u32,
   24|     pub int: u32,
   25|     pub cha: u32,
   26| }
   27| 
   28| impl Stats {
   29|     pub fn total(&self) -> u32 {
   30|         self.str + self.will + self.con + self.dex + self.int + self.cha
   31|     }
   32| }
   33| 
   34| /// Playable classes. Kept in one `enum` so match-exhaustiveness catches new classes.
   35| #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
   36| pub enum Class {
   37|     Warrior,
   38|     Arch

src/core/battle.rs: 991 lines, showing 1-400
    1| //! Turn-based idle battle: combatants, enemies, locations, turn order, auto-potions,
    2| //! death/respawn and companion effects.
    3| //!
    4| //! All randomness comes from `core::rng::Rng`. No other entropy source.
    5| //! Stat math lives in `core::stats`; enemy scaling, boss multipliers and pricing live in
    6| //! `core::balance`. This module orchestrates them, it never re-derives them.
    7| 
    8| use serde::{Deserialize, Serialize};
    9| 
   10| use crate::core::rng::Rng;
   11| use crate::core::stats::{damage_formula, Class, Character, Derived};
   12| 
   13| /// Hard stop for a single fight, mirroring the balance harness.
   14| pub const MAX_TURNS: u32 = 400;
   15| /// A fight that stays inside this many turns is "clearable" (the test contract).
   16| pub const N_TURNS_CLEAR: u32 = 60;
   17| /// HP fraction below which the auto-potion rule drinks an HP potion.
   18| pub const HP_POTION_THRESHOLD: f32 = 0.35;
   19| /// Fraction of `max_hp` an HP potion restores.
   20| pub const HP_POTION_RESTORE: f32 = 0.45;
   21| /// Fraction of `max_mp` an MP potion restores.
   22| pub const MP_POTION_RESTORE: f32 = 0.50;
   23| /// A buff potion's +25% on one derived stat, lasting `BUFF_TURNS` turns.
   24| pub const BUFF_PCT: f32 = 0.25;
   25| /// Turns a buff potion lasts.
   26| pub const BUFF_TURNS: u32 = 6;
   27| /// Fraction of gold lost on death (docs/mechanics.md §8).
   28| pub const DEATH_GOL

src/core/balance.rs: 412 lines, showing 1-200
    1| //! Class balance model + the balance table (docs/mechanics.md §5, §9).
    2| //!
    3| //! The graded measure: expected turns-to-kill the current location's boss, and the fraction of
    4| //! max HP left when it dies, at levels 1 / 10 / 25, each with the best gear affordable from a
    5| //! fixed gold budget. The three classes must land within ±10% of each other on both numbers at
    6| //! every reference point, and nobody may die.
    7| 
    8| use serde::{Deserialize, Serialize};
    9| 
   10| use crate::core::rng::{Rng, BALANCE_SEED};
   11| use crate::core::stats::{damage_formula, Class, Character, Derived};
   12| 
   13| /// Reference levels the balance test is evaluated at.
   14| pub const REFERENCE_LEVELS: [u32; 3] = [1, 10, 25];
   15| 
   16| /// Gold budget available at each reference level (paired with REFERENCE_LEVELS).
   17| pub const BUDGETS: [u32; 3] = [260, 1400, 6000];
   18| 
   19| /// Location index per reference level: Ember Fields, Ashen Woods, Cinder Mines.
   20| pub const REFERENCE_LOCATIONS: [usize; 3] = [0, 1, 2];
   21| 
   22| /// Location tier (1..4) per reference level.
   23| pub const REFERENCE_TIERS: [u32; 3] = [1, 2, 3];
   24| 
   25| /// Location display names, index-aligned with `REFERENCE_LOCATIONS`.
   26| pub const LOCATION_NAMES: [&str; 4] = [
   27|     "Ember Fields",
   28|     "Ashen Woods",
   29|     "Cinder Mines",
   30|     "Obsidian Keep",
   31| ];
   32| 
 

exit=1
error: unexpected argument '2>&1' found

Usage: cargo check [OPTIONS]

For more information, try '--help'.

exit=101
Checking emberfall v0.1.0 (/home/zerc/rpgbench/game)
warning: named argument `level` is not used by name
   --> src/core/balance.rs:355:79
    |
355 |         let _ = writeln!(out, "  level {:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                        -----                                  ^^^^^ this named argument is referred to by position in formatting string
    |                                        |
    |                                        this formatting argument uses named argument `level` by position
    |
    = note: `#[warn(named_arguments_used_positionally)]` on by default
help: use the named argument by name to avoid ambiguity
    |
355 |         let _ = writeln!(out, "  level {level:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                         +++++

warning: unused import: `Class`
  --> src/core/battle.rs:11:42
   |
11 | use crate::core::stats::{damage_formula, Class, Character, Derived};
   |                                          ^^^^^
   |
   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default

warning: unused imports: `Deserialize` and `Serialize`
 --> src/core/rng.rs:9:13
  |
9 | use serde::{Deserialize, Serialize};
  |             ^^^^^^^^^^^  ^^^^^^^^^

error[E0027]: pattern does not mention field `name`
   --> src/core/battle.rs:115:13
    |
115 |             Combatant::Hero { character, derived } => character.attack_power(derived),
    |

src/core/battle.rs: 991 lines, showing 620-719
  620|         None
  621|     }
  622| 
  623|     fn pick_hero_target(&self) -> usize {
  624|         for (i, c) in self.combatants.iter().enumerate() {
  625|             if matches!(c, Combatant::Hero { .. }) {
  626|                 return i;
  627|             }
  628|         }
  629|         0
  630|     }
  631| 
  632|     fn damage_target(&mut self, target: usize, dmg: f32, events: &mut Vec<BattleEvent>) {
  633|         match &mut self.combatants[target] {
  634|             Combatant::Enemy { hp, name, .. } => {
  635|                 *hp -= dmg;
  636|                 if *hp <= 0.0 {
  637|                     *hp = 0.0;
  638|                     let (gold, xp) = self.reward_for(name);
  639|                     self.gold_earned = self.gold_earned.saturating_add(gold);
  640|                     events.push(BattleEvent::EnemySlain { name: name.clone(), gold, xp });
  641|                     self.pending_alive = self.pending_alive.saturating_sub(1);
  642|                     if self.pending_alive == 0 {
  643|                         self.pending_waves = self.pending_waves.saturating_sub(1);
  644|                     }
  645|                     if self.is_boss {
  646|                         events.push(BattleEvent::BossSlain { name: name.clone() });
  647|                     }
  648|                     self.order = self.initiative();
  649|                 }
  650|             }
  651|             Combatant

src/core/battle.rs: 991 lines, showing 325-354
  325|     /// `waves`) or the boss when `boss` is true.
  326|     pub fn new_battle(
  327|         player: &Character,
  328|         gear_atk: f32,
  329|         gear_def: f32,
  330|         location: usize,
  331|         boss: bool,
  332|         waves: u32,
  333|         potion_inventory: (u32, u32, u32),
  334|         companions: Vec<crate::core::events::Companion>,
  335|         rng: &mut Rng,
  336|     ) -> Self {
  337|         let loc = location(location);
  338|         let level = player.level.max(1);
  339| 
  340|         let derived = Derived::with_gear(player, gear_def, gear_atk);
  341|         let hero = Combatant::Hero {
  342|             name: player.class.name().to_string(),
  343|             character: player.clone(),
  344|             derived,
  345|         };
  346| 
  347|         let mut combatants: Vec<Combatant> = vec![hero];
  348|         let mut pending: Vec<MobEntry> = Vec::new();
  349| 
  350|         if boss {
  351|             let b = crate::core::balance::boss_at(level, location);
  352|             combatants.push(Combatant::Enemy {
  353|                 name: b.name.to_string(),
  354|                 kind: EnemyKind::Boss,

src/core/battle.rs: 991 lines, showing 460-489
  460|                             attacker: self.combatants[actor].name().to_string(),
  461|                             target: "empty field".into(),
  462|                         });
  463|                         return self.settle(events);
  464|                     }
  465|                 };
  466| 
  467|                 let evad = self.combatants[target].evad_of();
  468|                 let (evaded, crit, dmg) = {
  469|                     let hero = &self.combatants[actor];
  470|                     let Combatant::Hero { character, derived } = hero else {
  471|                         unreachable!("target resolved to a non-hero actor")
  472|                     };
  473|                     let _ = character;
  474|                     let evaded = rng.chance(evad);
  475|                     let mut d = damage_formula(power, self.combatants[target].def_of());
  476|                     let crit = rng.chance(derived.crit_chance);
  477|                     if crit {
  478|                         d *= derived.crit_mult;
  479|                     }
  480|                     (evaded, crit, d)
  481|                 };
  482| 
  483|                 if evaded {
  484|                     events.push(BattleEvent::Miss {
  485|                         attacker: self.combatants[actor].name().to_string(),
  486|                         target: self.combatants[target].name().to_string(),
  487|                     });

ERROR: src/core/battle.rs is outside this phase's SCOPE (src/core/shop.rs, src/core/events.rs, src/core/save.rs). Files outside the scope are earlier phases' work and are not graded now; a failing test there is expected and NOT your task. If the brief truly requires the change, repeat the call with override_reason="<why>".

edited src/core/battle.rs: -74 +78 chars; file is now 991 lines

edited src/core/battle.rs: -70 +80 chars; file is now 991 lines

exit=101
Checking emberfall v0.1.0 (/home/zerc/rpgbench/game)
warning: named argument `level` is not used by name
   --> src/core/balance.rs:355:79
    |
355 |         let _ = writeln!(out, "  level {:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                        -----                                  ^^^^^ this named argument is referred to by position in formatting string
    |                                        |
    |                                        this formatting argument uses named argument `level` by position
    |
    = note: `#[warn(named_arguments_used_positionally)]` on by default
help: use the named argument by name to avoid ambiguity
    |
355 |         let _ = writeln!(out, "  level {level:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                         +++++

warning: unused import: `Class`
  --> src/core/battle.rs:11:42
   |
11 | use crate::core::stats::{damage_formula, Class, Character, Derived};
   |                                          ^^^^^
   |
   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default

warning: unused imports: `Deserialize` and `Serialize`
 --> src/core/rng.rs:9:13
  |
9 | use serde::{Deserialize, Serialize};
  |             ^^^^^^^^^^^  ^^^^^^^^^

error[E0599]: no associated function or constant named `location_for` found for struct `BattleState` in the current scope
   --> src/core/battle.rs:337:25
    |
286 | pub struct BattleState

edited src/core/battle.rs: -80 +91 chars; file is now 991 lines

edited src/core/battle.rs: -56 +60 chars; file is now 991 lines

edited src/core/battle.rs: -71 +128 chars; file is now 992 lines

src/core/shop.rs: 342 lines, showing 1-342
    1| //! Weapon/armor generation with power growth, potions, pricing, buying and selling.
    2| //!
    3| //! INTERFACE PHASE (phase 2). Bodies are `todo!()`; phase 3 implements them. The tests below are
    4| //! the contract and must keep failing red until then.
    5| //!
    6| //! Pricing and the CHA discount are *not* recomputed here — they are the single-source functions
    7| //! in `core::balance` (`item_price`, `price_after_cha`, `cha_discount`). This module decides what
    8| //! the shop contains and who may take it.
    9| 
   10| use serde::{Deserialize, Serialize};
   11| 
   12| use crate::core::rng::Rng;
   13| 
   14| /// Slots of generated gear offered per visit. Restocks on every visit.
   15| pub const STOCK_SLOTS: usize = 6;
   16| 
   17| /// Minimum and maximum affixes a generated item can carry (docs/mechanics.md §6).
   18| pub const AFFIX_MIN: u32 = 0;
   19| pub const AFFIX_MAX: u32 = 3;
   20| 
   21| /// Gold returned on a sale, as a fraction of the price actually paid.
   22| pub const SALE_RATE: f32 = 0.5;
   23| 
   24| /// Fixed potion prices — deliberately **not** CHA-discounted, so potions stay a gold-sink
   25| /// decision (docs/mechanics.md §6).
   26| pub const PRICE_HP_POTION: u32 = 30;
   27| pub const PRICE_MP_POTION: u32 = 36;
   28| pub const PRICE_BUFF_POTION: u32 = 60;
   29| pub const PRICE_STAT_POTION_COMMON: u32 = 240;
   30| pub const PRICE_STAT_POTION_RARE: u32 = 25;
   31| 

exit=1
error: unexpected argument '2>&1' found

Usage: cargo check [OPTIONS]

For more information, try '--help'.

src/core/battle.rs: 992 lines, showing 1-120
    1| //! Turn-based idle battle: combatants, enemies, locations, turn order, auto-potions,
    2| //! death/respawn and companion effects.
    3| //!
    4| //! All randomness comes from `core::rng::Rng`. No other entropy source.
    5| //! Stat math lives in `core::stats`; enemy scaling, boss multipliers and pricing live in
    6| //! `core::balance`. This module orchestrates them, it never re-derives them.
    7| 
    8| use serde::{Deserialize, Serialize};
    9| 
   10| use crate::core::rng::Rng;
   11| use crate::core::stats::{damage_formula, Class, Character, Derived};
   12| 
   13| /// Hard stop for a single fight, mirroring the balance harness.
   14| pub const MAX_TURNS: u32 = 400;
   15| /// A fight that stays inside this many turns is "clearable" (the test contract).
   16| pub const N_TURNS_CLEAR: u32 = 60;
   17| /// HP fraction below which the auto-potion rule drinks an HP potion.
   18| pub const HP_POTION_THRESHOLD: f32 = 0.35;
   19| /// Fraction of `max_hp` an HP potion restores.
   20| pub const HP_POTION_RESTORE: f32 = 0.45;
   21| /// Fraction of `max_mp` an MP potion restores.
   22| pub const MP_POTION_RESTORE: f32 = 0.50;
   23| /// A buff potion's +25% on one derived stat, lasting `BUFF_TURNS` turns.
   24| pub const BUFF_PCT: f32 = 0.25;
   25| /// Turns a buff potion lasts.
   26| pub const BUFF_TURNS: u32 = 6;
   27| /// Fraction of gold lost on death (docs/mechanics.md §8).
   28| pub const DEATH_GOL

exit=101
Checking emberfall v0.1.0 (/home/zerc/rpgbench/game)
error[E0433]: cannot find `serde_mobvec` in `battle`
   --> src/core/battle.rs:312:20
    |
312 |     #[serde(with = "crate::core::battle::serde_mobvec")]
    |                    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ could not find `serde_mobvec` in `battle`

warning: named argument `level` is not used by name
   --> src/core/balance.rs:355:79
    |
355 |         let _ = writeln!(out, "  level {:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                        -----                                  ^^^^^ this named argument is referred to by position in formatting string
    |                                        |
    |                                        this formatting argument uses named argument `level` by position
    |
    = note: `#[warn(named_arguments_used_positionally)]` on by default
help: use the named argument by name to avoid ambiguity
    |
355 |         let _ = writeln!(out, "  level {level:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                         +++++

warning: unused import: `Class`
  --> src/core/battle.rs:11:42
   |
11 | use crate::core::stats::{damage_formula, Class, Character, Derived};
   |                                          ^^^^^
   |
   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default

warning: unused imports: `Deserialize` and `Serialize`
 --> src/core/rng.rs:9:13
  |
9 | use ser

src/core/battle.rs: 992 lines, showing 280-349
  280|     /// `true` once the fight is over (cleared or hero dead); further `step` calls are no-ops.
  281|     pub done: bool,
  282| }
  283| 
  284| /// The live fight. Owned by `save::Player::battle` and driven by the UI timer.
  285| #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
  286| pub struct BattleState {
  287|     /// Current location index (0..4).
  288|     pub location: usize,
  289|     /// True for the location's boss fight.
  290|     pub is_boss: bool,
  291|     /// Initiative order: indices into `combatants`, sorted descending by speed, stable.
  292|     pub order: Vec<usize>,
  293|     /// All combatants. `order` indexes into this.
  294|     pub combatants: Vec<Combatant>,
  295|     /// Turn counter, 1-based once the first step runs.
  296|     pub turn: u32,
  297|     /// Gold accumulated this fight.
  298|     pub gold_earned: u32,
  299|     /// The auto-potion rules fired this fight.
  300|     pub potions_used: u32,
  301|     /// Set once the hero hits 0 HP.
  302|     pub hero_dead: bool,
  303|     /// Derived log for the current fight; embedded in `BattleOutcome::log`.
  304|     pub log: Vec<BattleEvent>,
  305|     /// `waves` still to fall for `cleared`.
  306|     pub pending_waves: u32,
  307|     /// Remaining live enemies from `pending_waves`.
  308|     pub pending_alive: u32,
  309|     /// Total waves to clear.
  310|     pub waves: u32,
  311|     /// Saved `MobEntry` f

src/core/battle.rs: 992 lines, showing 600-709
  600|             .unwrap_or(1)
  601|             .max(1)
  602|     }
  603| 
  604|     fn hero_hp_frac(&self) -> f32 {
  605|         match &self.combatants[0] {
  606|             Combatant::Hero { derived, .. } => {
  607|                 (derived.hp_pool / derived.max_hp.max(1.0)).clamp(0.0, 1.0)
  608|             }
  609|             _ => 0.0,
  610|         }
  611|     }
  612| 
  613|     fn pick_enemy_target(&self) -> Option<usize> {
  614|         for &i in &self.order {
  615|             if let Combatant::Enemy { hp, .. } = &self.combatants[i] {
  616|                 if *hp > 0.0 {
  617|                     return Some(i);
  618|                 }
  619|             }
  620|         }
  621|         None
  622|     }
  623| 
  624|     fn pick_hero_target(&self) -> usize {
  625|         for (i, c) in self.combatants.iter().enumerate() {
  626|             if matches!(c, Combatant::Hero { .. }) {
  627|                 return i;
  628|             }
  629|         }
  630|         0
  631|     }
  632| 
  633|     fn damage_target(&mut self, target: usize, dmg: f32, events: &mut Vec<BattleEvent>) {
  634|         match &mut self.combatants[target] {
  635|             Combatant::Enemy { hp, name, .. } => {
  636|                 *hp -= dmg;
  637|                 if *hp <= 0.0 {
  638|                     *hp = 0.0;
  639|                     let (gold, xp) = self.reward_for(name);
  640|                     se

src/core/battle.rs: 992 lines, showing 120-299
  120| 
  121|     fn evad_of(&self) -> f32 {
  122|         match self {
  123|             Combatant::Hero { derived, .. } => derived.evad,
  124|             Combatant::Enemy { evad, .. } => *evad,
  125|             Combatant::Companion { .. } => 0.0,
  126|         }
  127|     }
  128| 
  129|     fn def_of(&self) -> f32 {
  130|         match self {
  131|             Combatant::Hero { derived, .. } => derived.def,
  132|             Combatant::Enemy { def, .. } => *def,
  133|             Combatant::Companion { .. } => 0.0,
  134|         }
  135|     }
  136| }
  137| 
  138| /// One entry in the location's mob table.
  139| #[derive(Debug, Clone, Copy, PartialEq, Serialize, Deserialize)]
  140| pub struct MobEntry {
  141|     pub name: &'static str,
  142|     /// Base stats at level 1, tier 1; scaled by `balance::scale(level, tier)` at spawn.
  143|     pub hp: f32,
  144|     pub atk: f32,
  145|     pub def: f32,
  146|     /// Gold and XP value before scaling.
  147|     pub gold: f32,
  148|     pub xp: f32,
  149| }
  150| 
  151| /// A location: tier, mob table (3+ entries), boss, and unlock condition.
  152| #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
  153| pub struct Location {
  154|     pub name: &'static str,
  155|     /// 1..=4, index-aligned with `balance::LOCATION_NAMES`.
  156|     pub tier: u32,
  157|     pub mobs: Vec<MobEntry>,
  158|     /// The boss, drawn from `balance::boss_base

ERROR: src/core/battle.rs is outside this phase's SCOPE (src/main.rs, src/ui/*, index.html, Trunk.toml, Cargo.toml). Files outside the scope are earlier phases' work and are not graded now; a failing test there is expected and NOT your task. If the brief truly requires the change, repeat the call with override_reason="<why>".

ERROR: src/core/battle.rs is outside this phase's SCOPE (src/main.rs, src/ui/*, index.html, Trunk.toml, Cargo.toml). Files outside the scope are earlier phases' work and are not graded now; a failing test there is expected and NOT your task. If the brief truly requires the change, repeat the call with override_reason="<why>".

ERROR: src/core/battle.rs is outside this phase's SCOPE (src/main.rs, src/ui/*, index.html, Trunk.toml, Cargo.toml). Files outside the scope are earlier phases' work and are not graded now; a failing test there is expected and NOT your task. If the brief truly requires the change, repeat the call with override_reason="<why>".

edited src/core/battle.rs: -157 +145 chars; file is now 992 lines

edited src/core/battle.rs: -128 +71 chars; file is now 991 lines

edited src/core/battle.rs: -73 +74 chars; file is now 991 lines

src/core/battle.rs: 991 lines, showing 625-669
  625|             if matches!(c, Combatant::Hero { .. }) {
  626|                 return i;
  627|             }
  628|         }
  629|         0
  630|     }
  631| 
  632|     fn damage_target(&mut self, target: usize, dmg: f32, events: &mut Vec<BattleEvent>) {
  633|         match &mut self.combatants[target] {
  634|             Combatant::Enemy { hp, name, .. } => {
  635|                 *hp -= dmg;
  636|                 if *hp <= 0.0 {
  637|                     *hp = 0.0;
  638|                     let (gold, xp) = self.reward_for(name);
  639|                     self.gold_earned = self.gold_earned.saturating_add(gold);
  640|                     events.push(BattleEvent::EnemySlain { name: name.clone(), gold, xp });
  641|                     self.pending_alive = self.pending_alive.saturating_sub(1);
  642|                     if self.pending_alive == 0 {
  643|                         self.pending_waves = self.pending_waves.saturating_sub(1);
  644|                     }
  645|                     if self.is_boss {
  646|                         events.push(BattleEvent::BossSlain { name: name.clone() });
  647|                     }
  648|                     self.order = self.initiative();
  649|                 }
  650|             }
  651|             Combatant::Hero { derived, .. } => {
  652|                 derived.hp_pool -= dmg;
  653|                 if derived.hp_pool <= 0.0 {
  654|                     der

edited src/core/battle.rs: -1348 +1684 chars; file is now 1000 lines

exit=101
Checking emberfall v0.1.0 (/home/zerc/rpgbench/game)
warning: named argument `level` is not used by name
   --> src/core/balance.rs:355:79
    |
355 |         let _ = writeln!(out, "  level {:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                        -----                                  ^^^^^ this named argument is referred to by position in formatting string
    |                                        |
    |                                        this formatting argument uses named argument `level` by position
    |
    = note: `#[warn(named_arguments_used_positionally)]` on by default
help: use the named argument by name to avoid ambiguity
    |
355 |         let _ = writeln!(out, "  level {level:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                         +++++

warning: unused import: `Class`
  --> src/core/battle.rs:11:42
   |
11 | use crate::core::stats::{damage_formula, Class, Character, Derived};
   |                                          ^^^^^
   |
   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default

warning: unused imports: `Deserialize` and `Serialize`
 --> src/core/rng.rs:9:13
  |
9 | use serde::{Deserialize, Serialize};
  |             ^^^^^^^^^^^  ^^^^^^^^^

error[E0308]: mismatched types
   --> src/core/battle.rs:175:34
    |
175 |                 MobEntry { name: "Ember Sprite", hp: 52.0, atk: 6.0, def: 2.0, gold: 6.0, xp: 5.0 },
    |       

edited src/core/battle.rs: -145 +157 chars; file is now 1000 lines

exit=1
error: unexpected argument '2>&1' found

Usage: cargo check [OPTIONS]

For more information, try '--help'.

exit=101
Checking emberfall v0.1.0 (/home/zerc/rpgbench/game)
warning: named argument `level` is not used by name
   --> src/core/balance.rs:355:79
    |
355 |         let _ = writeln!(out, "  level {:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                        -----                                  ^^^^^ this named argument is referred to by position in formatting string
    |                                        |
    |                                        this formatting argument uses named argument `level` by position
    |
    = note: `#[warn(named_arguments_used_positionally)]` on by default
help: use the named argument by name to avoid ambiguity
    |
355 |         let _ = writeln!(out, "  level {level:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                         +++++

warning: unused import: `Class`
  --> src/core/battle.rs:11:42
   |
11 | use crate::core::stats::{damage_formula, Class, Character, Derived};
   |                                          ^^^^^
   |
   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default

warning: unused imports: `Deserialize` and `Serialize`
 --> src/core/rng.rs:9:13
  |
9 | use serde::{Deserialize, Serialize};
  |             ^^^^^^^^^^^  ^^^^^^^^^

error: lifetime may not live long enough
   --> src/core/battle.rs:311:5
    |
285 | #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
    |                                        

src/core/battle.rs: 1000 lines, showing 130-169
  130|         match self {
  131|             Combatant::Hero { derived, .. } => derived.def,
  132|             Combatant::Enemy { def, .. } => *def,
  133|             Combatant::Companion { .. } => 0.0,
  134|         }
  135|     }
  136| }
  137| 
  138| /// One entry in the location's mob table.
  139| #[derive(Debug, Clone, Copy, PartialEq, Serialize, Deserialize)]
  140| pub struct MobEntry {
  141|     pub name: &'static str,
  142|     /// Base stats at level 1, tier 1; scaled by `balance::scale(level, tier)` at spawn.
  143|     pub hp: f32,
  144|     pub atk: f32,
  145|     pub def: f32,
  146|     /// Gold and XP value before scaling.
  147|     pub gold: f32,
  148|     pub xp: f32,
  149| }
  150| 
  151| /// A location: tier, mob table (3+ entries), boss, and unlock condition.
  152| #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
  153| pub struct Location {
  154|     pub name: &'static str,
  155|     /// 1..=4, index-aligned with `balance::LOCATION_NAMES`.
  156|     pub tier: u32,
  157|     pub mobs: Vec<MobEntry>,
  158|     /// The boss, drawn from `balance::boss_bases()`.
  159|     pub boss: &'static str,
  160|     /// Minimum player level to travel here.
  161|     pub min_level: u32,
  162|     /// True when the *previous* location's boss must already be slain.
  163|     pub requires_prev_boss: bool,
  164| }
  165| 
  166| /// All four locations with their mob tables. Index-aligned wi

src/core/battle.rs: 1000 lines, showing 283-327
  283| 
  284| /// The live fight. Owned by `save::Player::battle` and driven by the UI timer.
  285| #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
  286| pub struct BattleState {
  287|     /// Current location index (0..4).
  288|     pub location: usize,
  289|     /// True for the location's boss fight.
  290|     pub is_boss: bool,
  291|     /// Initiative order: indices into `combatants`, sorted descending by speed, stable.
  292|     pub order: Vec<usize>,
  293|     /// All combatants. `order` indexes into this.
  294|     pub combatants: Vec<Combatant>,
  295|     /// Turn counter, 1-based once the first step runs.
  296|     pub turn: u32,
  297|     /// Gold accumulated this fight.
  298|     pub gold_earned: u32,
  299|     /// The auto-potion rules fired this fight.
  300|     pub potions_used: u32,
  301|     /// Set once the hero hits 0 HP.
  302|     pub hero_dead: bool,
  303|     /// Derived log for the current fight; embedded in `BattleOutcome::log`.
  304|     pub log: Vec<BattleEvent>,
  305|     /// `waves` still to fall for `cleared`.
  306|     pub pending_waves: u32,
  307|     /// Remaining live enemies from `pending_waves`.
  308|     pub pending_alive: u32,
  309|     /// Total waves to clear.
  310|     pub waves: u32,
  311|     /// Saved `MobEntry` for the next wave.
  312|     pub pending: Vec<MobEntry>,
  313|     /// `(hp, mp, buff)` potions remaining.
  314|     pub potions: (u32,

src/core/battle.rs: 1000 lines, showing 688-717
  688|         }
  689|         (0, 0)
  690|     }
  691| 
  692|     fn apply_companion(&mut self, actor: usize, events: &mut Vec<BattleEvent>) {
  693|         if let Combatant::Companion { name, turns_left, effect } = &mut self.combatants[actor] {
  694|             if *turns_left == 0 {
  695|                 return;
  696|             }
  697|             *turns_left -= 1;
  698|             match effect {
  699|                 crate::core::events::CompanionEffect::DamageBonus(pct) => {
  700|                     self.companion_damage_bonus = (self.companion_damage_bonus + pct.max(0.0)).min(0.5);
  701|                     events.push(BattleEvent::CompanionEffect {
  702|                         name: name.clone(),
  703|                         detail: format!("grants +{:.0}% physical damage this turn", *pct * 100.0),
  704|                     });
  705|                 }
  706|                 crate::core::events::CompanionEffect::HpPerTurn(v) => {
  707|                     if let Some(h) = self.hero_index() {
  708|                         if let Combatant::Hero { derived, .. } = &mut self.combatants[h] {
  709|                             derived.hp_pool = (derived.hp_pool + *v).min(derived.max_hp);
  710|                         }
  711|                     }
  712|                     events.push(BattleEvent::CompanionEffect {
  713|                         name: name.clone(),
  714|                         detail

ERROR: only these cargo subcommands are allowed: ['build', 'check', 'clippy', 'fmt', 'metadata', 'run', 'test', 'tree']

ERROR: only these cargo subcommands are allowed: ['build', 'check', 'clippy', 'fmt', 'metadata', 'run', 'test', 'tree']

Cargo.toml: 22 lines, showing 1-22
    1| [package]
    2| name = "emberfall"
    3| version = "0.1.0"
    4| edition = "2021"
    5| 
    6| [[bin]]
    7| name = "emberfall"
    8| path = "src/main.rs"
    9| 
   10| [dependencies]
   11| yew = { version = "0.21", features = ["csr"] }
   12| gloo = "0.11"
   13| gloo-storage = "0.3"
   14| gloo-timers = { version = "0.3", features = ["futures"] }
   15| serde = { version = "1", features = ["derive"] }
   16| serde_json = "1"
   17| wasm-bindgen = "0.2"
   18| web-sys = { version = "0.3", features = ["Window", "Document", "HtmlElement", "Storage", "Performance"] }
   19| js-sys = "0.3"
   20| rand = "0.8"
   21| rand_chacha = "0.3"
   22| getrandom = { version = "0.2", features = ["js"] }

ERROR: src/core/battle.rs is outside this phase's SCOPE (src/main.rs, src/ui/*, index.html, Cargo.toml). Files outside the scope are earlier phases' work and are not graded now; a failing test there is expected and NOT your task. If the brief truly requires the change, repeat the call with override_reason="<why>".

src/core/battle.rs: 1000 lines, showing 716-737
  716|                 }
  717|                 crate::core::events::CompanionEffect::GoldBonus(_) => {
  718|                     events.push(BattleEvent::CompanionEffect {
  719|                         name: name.clone(),
  720|                         detail: "boosts gold from kills".into(),
  721|                     });
  722|                 }
  723|             }
  724|         }
  725|     }
  726| 
  727|     fn hero_index(&self) -> Option<usize> {
  728|         self.combatants.iter().position(|c| matches!(c, Combatant::Hero { .. }))
  729|     }
  730| 
  731|     fn decay_buffs(&mut self) {
  732|         if self.hero_buff_turns > 0 {
  733|             self.hero_buff_turns -= 1;
  734|         }
  735|     }
  736| 
  737|     fn try_auto_potions(&mut self, _rng: &mut Rng, events: &mut Vec<BattleEvent>) {

edited src/core/battle.rs: -1617 +2147 chars; file is now 1015 lines

edited src/core/battle.rs: -71 +268 chars; file is now 1017 lines

exit=0
Checking emberfall v0.1.0 (/home/zerc/rpgbench/game)
warning: named argument `level` is not used by name
   --> src/core/balance.rs:355:79
    |
355 |         let _ = writeln!(out, "  level {:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                        -----                                  ^^^^^ this named argument is referred to by position in formatting string
    |                                        |
    |                                        this formatting argument uses named argument `level` by position
    |
    = note: `#[warn(named_arguments_used_positionally)]` on by default
help: use the named argument by name to avoid ambiguity
    |
355 |         let _ = writeln!(out, "  level {level:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                         +++++

warning: unused import: `Class`
  --> src/core/battle.rs:11:42
   |
11 | use crate::core::stats::{damage_formula, Class, Character, Derived};
   |                                          ^^^^^
   |
   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default

warning: unused imports: `Deserialize` and `Serialize`
 --> src/core/rng.rs:9:13
  |
9 | use serde::{Deserialize, Serialize};
  |             ^^^^^^^^^^^  ^^^^^^^^^

warning: `emberfall` (bin "emberfall") generated 3 warnings (run `cargo fix --bin "emberfall" -p emberfall` to apply 2 suggestions)
    Finished `dev` profile [unoptimized + debuginfo] target

exit=0
Checking emberfall v0.1.0 (/home/zerc/rpgbench/game)
warning: named argument `level` is not used by name
   --> src/core/balance.rs:355:79
    |
355 |         let _ = writeln!(out, "  level {:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                        -----                                  ^^^^^ this named argument is referred to by position in formatting string
    |                                        |
    |                                        this formatting argument uses named argument `level` by position
    |
    = note: `#[warn(named_arguments_used_positionally)]` on by default
help: use the named argument by name to avoid ambiguity
    |
355 |         let _ = writeln!(out, "  level {level:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                         +++++

warning: unused import: `Class`
  --> src/core/battle.rs:11:42
   |
11 | use crate::core::stats::{damage_formula, Class, Character, Derived};
   |                                          ^^^^^
   |
   = note: `#[warn(unused_imports)]` (part of `#[warn(unused)]`) on by default

warning: unused imports: `Deserialize` and `Serialize`
 --> src/core/rng.rs:9:13
  |
9 | use serde::{Deserialize, Serialize};
  |             ^^^^^^^^^^^  ^^^^^^^^^

warning: `emberfall` (bin "emberfall") generated 3 warnings (run `cargo fix --bin "emberfall" -p emberfall` to apply 2 suggestions)
    Finished `dev` profile [unoptimized + debuginfo] target

docs/mechanics.md: 192 lines, showing 1-120
    1| # EMBERFALL — mechanic math (phase 1, authoritative)
    2| 
    3| All numbers below are implemented in exactly two places: `src/core/stats.rs` (stat formulas,
    4| level-ups, class tables) and `src/core/balance.rs` (enemy scaling, boss multipliers, shop power
    5| growth + pricing, the balance measure). `src/core/rng.rs` is the only randomness source. Nothing
    6| in `core/` may touch web/yew.
    7| 
    8| Conventions: `f32` for stats and damage, `u32` for gold/levels/turns. All growth terms are written
    9| as `base + perLevel * (level - 1)` so a level-1 character uses exactly the base value.
   10| 
   11| ## 1. Primary stats
   12| 
   13| Six primaries: `STR, WILL, CON, DEX, INT, CHA`.
   14| 
   15| * Every class **starts at level 1 with a total of 60** primary points (`PRIMARY_TOTAL = 60`).
   16| * Every level-up grants **`POINTS_PER_LEVEL = 3`** points, distributed by the class *growth
   17|   weights* (integers summing to 3, so the totals stay exact and integral at every level).
   18| * `CHA` is a primary stat like any other: it gates companion checks, event outcomes and feeds the
   19|   shop discount (§7). It never enters damage maths.
   20| 
   21| ### Class base tables (level 1, total = 60) and growth weights (sum = 3)
   22| 
   23| | Class   | STR | WILL | CON | DEX | INT | CHA | Σ  | growth weights (STR/WILL/CON/DEX/INT/CHA) |
   24| |---------|----:|-----:|----:|----:|----:|----:|---:|--------

docs/mechanics.md: 192 lines, showing 120-191
  120| 
  121| **Potions** (fixed prices, no CHA discount on potions so they stay a gold-sink decision):
  122| 
  123| | potion          | price | effect |
  124| |-----------------|------:|--------|
  125| | HP potion       |    30 | restore 45% of `max_hp` |
  126| | MP potion       |    36 | restore 50% of `max_mp` |
  127| | buff potion     |    60 | `+25%` to one derived stat (atk/def/evad/speed) for `BUFF_TURNS = 6` turns |
  128| | **Stat potion (common)** | 240 | `+1` to one chosen primary, **common stock (~55% of visits carry one)** |
  129| | **Stat potion (rare)**   |  25 | `+1` to one chosen primary, **rare stock (~6% of visits carry one)** |
  130| 
  131| The two stat-potion kinds are the spec's "cheap-but-rare / expensive-but-common" pair: the
  132| expensive one is easy to find and taxes the gold economy, the cheap one is a lottery.
  133| Auto-usage rules (combat AI, `battle.rs`): `hp_pct < 0.35` → HP potion; `mp < spell_cost` → MP
  134| potion; first turn of a boss fight → buff potion.
  135| 
  136| ## 7. Events and companions
  137| 
  138| Travel events roll once per `EVENT_EVERY = 5` turns (and on town visits) from `core::rng`:
  139| 
  140| | event              | probability | outcome |
  141| |--------------------|------------:|---------|
  142| | treasure           |      0.30   | `+ (8 + 6*level) * (1 + 0.5*CHA/15)` gold — CHA-biased |
  143| | ambush             |      0.25   | immediate extra enemy 

rs files: 9
MODULE WIRING: undeclared .rs files: none; files shadowed by an inline `mod x {}` stub: none
cargo test: exit 101; 17/44 pass; failing: ['core::battle::tests::different_seeds_diverge', 'core::battle::tests::every_location_boss_is_bearable_at_reference_levels', 'core::events::tests::companion_leaves_after_2_to_3_turns', 'core::events::tests::event_rolls_are_deterministic', 'core::battle::tests::turn_order_follows_speed', 'core::events::tests::events_roll_with_documented_probabilities', 'core::events::tests::events_only_roll_on_the_interval', 'core::events::tests::stranger_joins_iff_cha_meets_threshold', 'core::events::tests::gold_bonus_applies_only_while_following', 'core::events::tests::stranger_table_matches_documented_thresholds', 'core::save::tests::empty_slot_is_not_a_run', 'core::save::tests::new_game_gives_60_stat_points', 'core::save::tests::new_game_is_seeded_deterministically', 'core::save::tests::round_trip_is_lossless_for_all_three_slots', 'core::save::tests::version_mismatch_is_reported', 'core::save::tests::slot_keys_are_distinct_and_index_pure', 'core::shop::tests::buying_pays_the_discounted_price', 'core::shop::tests::generation_is_deterministic', 'core::shop::tests::cannot_buy_without_gold', 'core::shop::tests::selling_returns_half_paid_price', 'core::shop::tests::stock_has_fixed_size_and_restocks_each_visit', 'core::shop::tests::stat_potion_kinds_match_documented_probabilities', 'core::shop::tests::item_power_grows_with_level_and_tier', 'core::sho

exit=1
error: unexpected argument '|' found

Usage: cargo test [OPTIONS] [TESTNAME] [-- [ARGS]...]

For more information, try '--help'.

exit=1
error: unexpected argument '|' found

Usage: cargo test [OPTIONS] [TESTNAME] [-- [ARGS]...]

For more information, try '--help'.

ERROR: only these cargo subcommands are allowed: ['build', 'check', 'clippy', 'fmt', 'metadata', 'run', 'test', 'tree']

exit=101
running 44 tests
test core::balance::tests::cha_discount_reduces_price_and_caps ... ok
test core::balance::tests::boss_scales_above_mobs_and_price_grows_superlinear ... ok
test core::battle::tests::damage_is_at_least_one_and_decreases_with_defence ... ok
test core::battle::tests::companion_effect_applies_then_expires ... ok
test core::battle::tests::evasion_and_crit_are_bounded ... ok
test core::battle::tests::auto_potion_rules_trigger ... ok
test core::battle::tests::four_locations_each_with_3_mobs_and_a_boss ... ok
test core::battle::tests::respawn_keeps_90_percent_of_gold ... ok
test core::battle::tests::same_seed_replays_identical_battle_log ... ok
test core::battle::tests::wave1_enemy_dies_to_level1_hero_of_every_class ... ok
test core::battle::tests::every_location_boss_is_bearable_at_reference_levels ... FAILED
test core::battle::tests::different_seeds_diverge ... FAILED
test core::events::tests::event_rolls_are_deterministic ... FAILED
test core::events::tests::companion_leaves_after_2_to_3_turns ... FAILED
test core::battle::tests::turn_order_follows_speed ... FAILED
test core::events::tests::events_only_roll_on_the_interval ... FAILED
test core::events::tests::events_roll_with_documented_probabilities ... FAILED
test core::events::tests::gold_bonus_applies_only_while_following ... FAILED
test core::events::tests::stranger_joins_iff_cha_meets_threshold ... FAILED
test core::events::tests::stranger_table_matches_documented_thresholds ... FAILED
test core::sav

src/core/stats.rs: 292 lines, showing 1-292
    1| //! Primary stats, class tables, derived-stat formulas and level-ups.
    2| //! This is the single home of the stat math (see docs/mechanics.md §1-§4).
    3| 
    4| use serde::{Deserialize, Serialize};
    5| 
    6| /// Total primary stat points every class owns at level 1 (per-class budget; 60 each).
    7| pub const PRIMARY_TOTAL: u32 = 180;
    8| /// Primary points granted per level-up, distributed by class growth weights.
    9| pub const POINTS_PER_LEVEL: u32 = 3;
   10| 
   11| /// Caps / coefficients for the derived formulas (docs/mechanics.md §2).
   12| pub const EVAD_CAP: f32 = 0.35;
   13| pub const CRIT_CAP: f32 = 0.45;
   14| pub const CRIT_BASE: f32 = 0.02;
   15| pub const STAFF_FALLBACK: f32 = 0.45;
   16| 
   17| /// The six primary stats.
   18| #[derive(Debug, Clone, Copy, PartialEq, Eq, Default, Serialize, Deserialize)]
   19| pub struct Stats {
   20|     pub str: u32,
   21|     pub will: u32,
   22|     pub con: u32,
   23|     pub dex: u32,
   24|     pub int: u32,
   25|     pub cha: u32,
   26| }
   27| 
   28| impl Stats {
   29|     pub fn total(&self) -> u32 {
   30|         self.str + self.will + self.con + self.dex + self.int + self.cha
   31|     }
   32| }
   33| 
   34| /// Playable classes. Kept in one `enum` so match-exhaustiveness catches new classes.
   35| #[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
   36| pub enum Class {
   37|     Warrior,
   38|     Arch

src/core/save.rs: 192 lines, showing 1-192
    1| //! SaveGame (serde, versioned, 3 slots) and the player's run state.
    2| //!
    3| //! INTERFACE PHASE (phase 2). Bodies are `todo!()`; phase 3/4 implement them. Slot handling is a
    4| //! **pure function of the slot index** so the tests can pin it without a browser: no web-sys or
    5| //! gloo reference may appear in this file — the UI layer calls `slot_key` and does the IO.
    6| 
    7| use serde::{Deserialize, Serialize};
    8| 
    9| use crate::core::battle::BattleState;
   10| use crate::core::events::Companion;
   11| use crate::core::shop::{Item, Potion};
   12| use crate::core::stats::{Character, Class};
   13| 
   14| /// Version stamp written into every slot. Bumped when the layout changes; `from_json` on an old
   15| /// version returns `Err(SaveError::Version)` rather than silently misreading bytes.
   16| pub const SAVE_VERSION: u32 = 1;
   17| 
   18| /// Number of save slots (3).
   19| pub const SLOTS: u8 = 3;
   20| 
   21| /// The localStorage key for a slot — pure function of the index, no IO.
   22| /// `slot_key(0) == "emberfall.save.0"` etc. Slots are 0..SLOTS.
   23| pub fn slot_key(slot: u8) -> String {
   24|     let _ = slot;
   25|     todo!()
   26| }
   27| 
   28| /// Everything the run owns besides the hero: inventory, potions, gold, progress.
   29| #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
   30| pub struct Player {
   31|     /// The hero (class, level, xp, prima

src/core/shop.rs: 342 lines, showing 1-342
    1| //! Weapon/armor generation with power growth, potions, pricing, buying and selling.
    2| //!
    3| //! INTERFACE PHASE (phase 2). Bodies are `todo!()`; phase 3 implements them. The tests below are
    4| //! the contract and must keep failing red until then.
    5| //!
    6| //! Pricing and the CHA discount are *not* recomputed here — they are the single-source functions
    7| //! in `core::balance` (`item_price`, `price_after_cha`, `cha_discount`). This module decides what
    8| //! the shop contains and who may take it.
    9| 
   10| use serde::{Deserialize, Serialize};
   11| 
   12| use crate::core::rng::Rng;
   13| 
   14| /// Slots of generated gear offered per visit. Restocks on every visit.
   15| pub const STOCK_SLOTS: usize = 6;
   16| 
   17| /// Minimum and maximum affixes a generated item can carry (docs/mechanics.md §6).
   18| pub const AFFIX_MIN: u32 = 0;
   19| pub const AFFIX_MAX: u32 = 3;
   20| 
   21| /// Gold returned on a sale, as a fraction of the price actually paid.
   22| pub const SALE_RATE: f32 = 0.5;
   23| 
   24| /// Fixed potion prices — deliberately **not** CHA-discounted, so potions stay a gold-sink
   25| /// decision (docs/mechanics.md §6).
   26| pub const PRICE_HP_POTION: u32 = 30;
   27| pub const PRICE_MP_POTION: u32 = 36;
   28| pub const PRICE_BUFF_POTION: u32 = 60;
   29| pub const PRICE_STAT_POTION_COMMON: u32 = 240;
   30| pub const PRICE_STAT_POTION_RARE: u32 = 25;
   31| 

src/core/events.rs: 230 lines, showing 1-230
    1| //! Random travel events and CHA-gated companions.
    2| //!
    3| //! INTERFACE PHASE (phase 2). Bodies are `todo!()`; phase 3 implements them. The tests below are
    4| //! the contract. All draws go through `core::rng::Rng` — an event roll must never touch any other
    5| //! entropy source, which is what makes the probability tests reproducible.
    6| 
    7| use serde::{Deserialize, Serialize};
    8| 
    9| use crate::core::rng::Rng;
   10| 
   11| /// Roll one event every `EVENT_EVERY` turns while travelling, and once per town visit.
   12| pub const EVENT_EVERY: u32 = 5;
   13| 
   14| /// Documented event probabilities (docs/mechanics.md §7). These sum to 1.0 and are the exact
   15| /// numbers the sampled test asserts against.
   16| pub const P_TREASURE: f32 = 0.30;
   17| pub const P_AMBUSH: f32 = 0.25;
   18| pub const P_SHRINE: f32 = 0.20;
   19| pub const P_MERCHANT: f32 = 0.15;
   20| pub const P_STRANGER: f32 = 0.10;
   21| 
   22| /// A stranger offer, resolved once by `try_recruit` — no rerolls.
   23| #[derive(Debug, Clone, PartialEq, Serialize, Deserialize)]
   24| pub struct Stranger {
   25|     pub name: String,
   26|     /// CHA required for the stranger to join. `cha >= cha_threshold` succeeds; anything less and
   27|     /// the stranger simply leaves.
   28|     pub cha_threshold: u32,
   29|     /// How many turns they stay once recruited: 2 or 3 by design.
   30|     pub turns: u32,
   

src/core/battle.rs: 1017 lines, showing 1-200
    1| //! Turn-based idle battle: combatants, enemies, locations, turn order, auto-potions,
    2| //! death/respawn and companion effects.
    3| //!
    4| //! All randomness comes from `core::rng::Rng`. No other entropy source.
    5| //! Stat math lives in `core::stats`; enemy scaling, boss multipliers and pricing live in
    6| //! `core::balance`. This module orchestrates them, it never re-derives them.
    7| 
    8| use serde::{Deserialize, Serialize};
    9| 
   10| use crate::core::rng::Rng;
   11| use crate::core::stats::{damage_formula, Class, Character, Derived};
   12| 
   13| /// Hard stop for a single fight, mirroring the balance harness.
   14| pub const MAX_TURNS: u32 = 400;
   15| /// A fight that stays inside this many turns is "clearable" (the test contract).
   16| pub const N_TURNS_CLEAR: u32 = 60;
   17| /// HP fraction below which the auto-potion rule drinks an HP potion.
   18| pub const HP_POTION_THRESHOLD: f32 = 0.35;
   19| /// Fraction of `max_hp` an HP potion restores.
   20| pub const HP_POTION_RESTORE: f32 = 0.45;
   21| /// Fraction of `max_mp` an MP potion restores.
   22| pub const MP_POTION_RESTORE: f32 = 0.50;
   23| /// A buff potion's +25% on one derived stat, lasting `BUFF_TURNS` turns.
   24| pub const BUFF_PCT: f32 = 0.25;
   25| /// Turns a buff potion lasts.
   26| pub const BUFF_TURNS: u32 = 6;
   27| /// Fraction of gold lost on death (docs/mechanics.md §8).
   28| pub const DEATH_GO

src/core/battle.rs: 1017 lines, showing 200-439
  200|                 MobEntry { name: "Ore Golem", hp: 180.0, atk: 19.0, def: 13.0, gold: 24.0, xp: 21.0 },
  201|                 MobEntry { name: "Deep Echo", hp: 210.0, atk: 22.0, def: 15.0, gold: 28.0, xp: 25.0 },
  202|             ],
  203|             boss: cinder.name,
  204|             min_level: 18,
  205|             requires_prev_boss: true,
  206|         },
  207|         Location {
  208|             name: LOCATION_NAMES[3],
  209|             tier: 4,
  210|             mobs: vec![
  211|                 MobEntry { name: "Obsidian Pawn", hp: 220.0, atk: 24.0, def: 18.0, gold: 32.0, xp: 29.0 },
  212|                 MobEntry { name: "Void Sentry", hp: 260.0, atk: 28.0, def: 21.0, gold: 38.0, xp: 34.0 },
  213|                 MobEntry { name: "Gloom Revenant", hp: 300.0, atk: 32.0, def: 24.0, gold: 44.0, xp: 40.0 },
  214|             ],
  215|             boss: obsidian.name,
  216|             min_level: 30,
  217|             requires_prev_boss: true,
  218|         },
  219|     ]
  220| }
  221| 
  222| /// The location for `index` (clamped to the 4 defined).
  223| pub fn location(index: usize) -> Location {
  224|     locations().remove(index.min(3))
  225| }
  226| 
  227| /// Whether `player_level` plus already-slain bosses allow travelling to `index`.
  228| pub fn is_unlocked(loc: &Location, player_level: u32, slain: &[&'static str]) -> bool {
  229|     if player_level < loc.min_level {
  230|     

src/core/battle.rs: 1017 lines, showing 440-769
  440|             actor: self.combatants[actor].name().to_string(),
  441|         });
  442| 
  443|         // Companion effect first, before damage.
  444|         self.apply_companion(actor, &mut events);
  445|         self.decay_buffs();
  446| 
  447|         match self.combatants[actor].clone() {
  448|             Combatant::Hero { .. } => {
  449|                 self.try_auto_potions(rng, &mut events);
  450| 
  451|                 let (power, cost) = self.combatants[actor].attack_power();
  452|                 if cost > 0.0 {
  453|                     if let Combatant::Hero { derived, .. } = &mut self.combatants[actor] {
  454|                         derived.mp_pool = (derived.mp_pool - cost).max(0.0);
  455|                     }
  456|                 }
  457| 
  458|                 let target = match self.pick_enemy_target() {
  459|                     Some(t) => t,
  460|                     None => {
  461|                         events.push(BattleEvent::Miss {
  462|                             attacker: self.combatants[actor].name().to_string(),
  463|                             target: "empty field".into(),
  464|                         });
  465|                         return self.settle(events);
  466|                     }
  467|                 };
  468| 
  469|                 let evad = self.combatants[target].evad_of();
  470|                 let (evaded, crit, dmg) = {
  471|               

src/core/battle.rs: 1017 lines, showing 769-1017
  769|             self.potions_used += 1;
  770|             events.push(BattleEvent::HpPotionUsed {
  771|                 who: self.combatants[h].name().to_string(),
  772|                 restored,
  773|             });
  774|         }
  775|         let (mp_pool, spell_cost) = {
  776|             let Combatant::Hero { derived, .. } = &self.combatants[h] else { return };
  777|             (derived.mp_pool, derived.spell_cost)
  778|         };
  779|         if mp_pool < spell_cost && self.potions.1 > 0 {
  780|             let restored = {
  781|                 let Combatant::Hero { derived, .. } = &self.combatants[h] else { return };
  782|                 (derived.max_mp * MP_POTION_RESTORE).min(derived.max_mp - derived.mp_pool)
  783|             };
  784|             self.potions.1 -= 1;
  785|             if let Combatant::Hero { derived, .. } = &mut self.combatants[h] {
  786|                 derived.mp_pool = (derived.mp_pool + restored).min(derived.max_mp);
  787|             }
  788|             self.potions_used += 1;
  789|             events.push(BattleEvent::MpPotionUsed {
  790|                 who: self.combatants[h].name().to_string(),
  791|                 restored,
  792|             });
  793|         }
  794|         if self.is_boss && self.turn <= 1 && self.potions.2 > 0 {
  795|             self.potions.2 -= 1;
  796|             self.hero_buff_turns = BUFF_TURNS;
  797|             self.potions

exit=101
running 1 test
test core::battle::tests::turn_order_follows_speed ... FAILED

failures:

---- core::battle::tests::turn_order_follows_speed stdout ----

thread 'core::battle::tests::turn_order_follows_speed' (1505032) panicked at src/core/battle.rs:877:9:
assertion failed: order.len() >= 2
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace


failures:
    core::battle::tests::turn_order_follows_speed

test result: FAILED. 0 passed; 1 failed; 0 ignored; 0 measured; 43 filtered out; finished in 0.00s


warning: named argument `level` is not used by name
   --> src/core/balance.rs:355:79
    |
355 |         let _ = writeln!(out, "  level {:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                        -----                                  ^^^^^ this named argument is referred to by position in formatting string
    |                                        |
    |                                        this formatting argument uses named argument `level` by position
    |
    = note: `#[warn(named_arguments_used_positionally)]` on by default
help: use the named argument by name to avoid ambiguity
    |
355 |         let _ = writeln!(out, "  level {level:>2}: ttk {ttk:.4}  hp_left {hp:.4}", level = level);
    |                                         +++++

warning: unused import: `Class`
  --> src/core/battle.rs:11:42
   |
11 | use crate::core::stats::{damage_formula, Class, Character, Derived};
   |        

edited src/core/battle.rs: -1042 +1846 chars; file is now 1035 lines

exit=101
running 44 tests
test core::balance::tests::cha_discount_reduces_price_and_caps ... ok
test core::battle::tests::auto_potion_rules_trigger ... ok
test core::battle::tests::companion_effect_applies_then_expires ... ok
test core::battle::tests::evasion_and_crit_are_bounded ... ok
test core::battle::tests::four_locations_each_with_3_mobs_and_a_boss ... ok
test core::battle::tests::damage_is_at_least_one_and_decreases_with_defence ... ok
test core::balance::tests::boss_scales_above_mobs_and_price_grows_superlinear ... ok
test core::battle::tests::different_seeds_diverge ... FAILED
test core::battle::tests::every_location_boss_is_bearable_at_reference_levels ... FAILED
test core::battle::tests::respawn_keeps_90_percent_of_gold ... ok
test core::battle::tests::turn_order_follows_speed ... ok
test core::battle::tests::same_seed_replays_identical_battle_log ... ok
test core::events::tests::companion_leaves_after_2_to_3_turns ... FAILED
test core::events::tests::event_rolls_are_deterministic ... FAILED
test core::events::tests::events_only_roll_on_the_interval ... FAILED
test core::battle::tests::wave1_enemy_dies_to_level1_hero_of_every_class ... ok
test core::events::tests::events_roll_with_documented_probabilities ... FAILED
test core::events::tests::gold_bonus_applies_only_while_following ... FAILED
test core::save::tests::empty_slot_is_not_a_run ... FAILED
test core::save::tests::new_game_is_seeded_deterministically ... FAILED
test core::rng::tests::same_seed_replays_same

edited src/core/stats.rs: -122 +121 chars; file is now 292 lines

edited src/core/battle.rs: -68 +61 chars; file is now 1035 lines