Closes the last solver-on-main-thread hot path. The synchronous
v0.17.0 hint flow called solitaire_core::solver::try_solve_from_state
inline on every H press; median latency was ~2 ms but pathological
positions hit the SolverConfig::default() cap at ~120 ms — a visible
input stall on the same frame the player presses H.
Mirrors the d489e7a PendingNewGameSeed pattern. New module
pending_hint.rs holds:
- PendingHintTask resource carrying an Option<HintTask> with
handle: Task<HintTaskOutput> plus move_count_at_spawn for
staleness detection.
- HintTaskOutput enum: SolverMove { from, to } when the verdict
is Winnable + a first_move; NeedsHeuristic when the solver
returns Unwinnable or Inconclusive.
- poll_pending_hint_task system: polls the task each frame and
surfaces the result via the now-public emit_hint_visuals (or
runs find_heuristic_hint on the live state for the
NeedsHeuristic branch). Discards the result when
GameState.move_count has advanced past move_count_at_spawn.
- drop_pending_hint_on_state_change system: any
StateChangedEvent drops the in-flight task. Cooperatively
cancels via Bevy's Task Drop at the next await point.
- PendingHintTask::spawn implements cancel-on-replace — a fresh
H press while a previous task is in flight overwrites the
handle, dropping the prior task.
input_plugin changes:
- handle_keyboard_hint becomes a thin spawn point. Snapshots
the live state, asks the solver via PendingHintTask::spawn,
returns. No card-entity query, no event writers for the
hint visual / toast — the polling system owns those.
- emit_hint_visuals promoted to pub so pending_hint can call it.
- find_heuristic_hint extracted as a pub helper for the
NeedsHeuristic poll path.
- InputPlugin registers PendingHintTask + the two new systems.
drop-on-state-change is chained .before() poll so a move
applied this frame cancels any in-flight task before its
result can be surfaced.
Tests:
- input_plugin: pressing_h_spawns_pending_hint_task (1) — pins
the H-key wiring at one-frame granularity.
- pending_hint: winnable_solver_emits_hint_after_async_completes,
state_change_drops_in_flight_task,
second_spawn_drops_first_in_flight_task (3) — drives the
AsyncComputeTaskPool with a wall-clock-bounded loop mirroring
the winnable_seed_search_* template.
- Removed two now-stale synchronous tests
(hint_uses_solver_when_winnable,
hint_falls_back_to_heuristic_when_solver_inconclusive) — the
behaviours they pinned now live in pending_hint::tests at the
correct layer.
Workspace: 1168 passing tests / 0 failing, was 1166 (net +2:
removed 2 stale, added 4 new). cargo clippy --workspace
--all-targets -- -D warnings clean.
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
Solitaire Quest
A cross-platform Klondike Solitaire game written in Rust, with a card-theme system, full progression (XP / levels / achievements / daily challenges), and optional self-hosted sync so your stats follow you across machines.
Features
- Klondike Solitaire — Draw One and Draw Three modes; foundations are unlocked (any Ace lands in any empty slot, the slot then claims that suit)
- Card themes — bundled hayeah/playing-cards-assets default plus user-installable themes (drop a directory under the data dir or import a zip from Settings → Cosmetic)
- Modern HUD — reserved top band keeps cards from crowding the score readout; the action bar auto-fades when the cursor leaves it so it can't compete with the play surface
- Drag feel — every legal drop target is highlighted in green during drag; cards cast a soft drop shadow that lifts when picked up; the stock pile shows a remaining-count chip so you can see how close you are to a recycle
- Keyboard navigation — Tab cycles focus through buttons, arrow keys move within picker rows, Enter activates; works across every modal and the HUD action bar
- Progression — XP, levels, unlockable card backs and backgrounds
- 19 Achievements — including secret ones
- Daily Challenge — server-seeded so every player worldwide gets the same deal
- Leaderboard — opt-in, powered by your own self-hosted server
- Special Modes (unlocked at level 5): Zen, Time Attack, Challenge
- Sync — pull/push stats across devices via a self-hosted server
- Color-blind mode — blue tint on red-suit cards alongside the suit glyph
Building
Prerequisites
- Rust stable toolchain (
rustup install stable) - Linux:
libasound2-dev libudev-dev libxkbcommon-dev - macOS: Xcode Command Line Tools
# Fast development build
cargo run -p solitaire_app --features bevy/dynamic_linking
# Release build
cargo build -p solitaire_app --release
./target/release/solitaire_app
Controls
Every action also has a visible UI button — keyboard shortcuts are optional accelerators.
| Key | Action |
|---|---|
| Left click / drag | Move cards |
| Double click | Auto-move card to its best legal destination |
| Right click | Highlight legal moves for a card |
| Space / D | Draw from stock |
| U | Undo |
| H | Hint (highlight a legal move) |
| N | New game |
| Z | Zen mode |
| G | Forfeit (during pause) |
| Tab / Shift+Tab | Cycle keyboard focus |
| Enter | Activate focused button / auto-complete (when badge is lit) |
| Esc | Pause / dismiss modal |
| F1 | Help / controls |
| F11 | Toggle fullscreen |
| S / A / P / O / L / M | Stats / Achievements / Profile / Settings / Leaderboard / Menu |
Card themes
The default theme ships embedded in the binary, so the game runs
self-contained with no external assets. To install another theme, drop a
directory containing a theme.ron manifest plus 53 SVG files (52 faces +
1 back) under the platform data dir's themes/ folder, or import a zip
from Settings → Cosmetic. The picker chip lights up the moment a new
theme is registered. Themes are SVG-based, so they rasterise cleanly at
whatever resolution the window happens to be.
Sync Server (optional)
To sync stats across machines, run the self-hosted server. See README_SERVER.md for setup instructions.
Once the server is running, open Settings → Sync Backend, enter the server URL and your username, and register an account from within the game.
Running Tests
# All tests (982 passing as of v0.11.0)
cargo test --workspace
# Just game logic (no display required)
cargo test -p solitaire_core -p solitaire_sync -p solitaire_data -p solitaire_server
# Lint
cargo clippy --workspace --all-targets -- -D warnings
Credits
Built on Bevy and the wider Rust ecosystem
(Tokio, Axum, sqlx, Serde, kira, and many more). Card faces come from
hayeah/playing-cards-assets
(MIT, derived from the public-domain vector-playing-cards library); the
default card back is original work; the UI font is FiraMono-Medium (OFL).
All audio is synthesized programmatically by this project. See
CREDITS.md for the full list and license details.
Changelog
See CHANGELOG.md.
License
MIT — see LICENSE.