Gameplay and reusable engine series

Forty changes, each delivered in its own branch and pull request. Runtime code uses workspace crates and std only. Simulation owns time, collision, rewards and accepted input; rendering is an adapter. GitHub Actions stays disabled for this series; validation is local. The APIs are available under ferravex_play::gameplay and ferravex_engine::gameplay.

Backlog

Each new module contains behavioral tests and its authoring contract. Game changes include real-input regressions and retain ordinary victory/loss tests. The delivery links above and validation record below track the completed work.

Composition guide

Game-loop recipes map every API to its authoring and authority contract. The runnable gameplay_recipe example composes waves, XP, upgrade offers, inventory, interaction and atomic crafting without a renderer.

Validation correction

PR 68's initial local check caught a Rust borrow error. It was merged before that failed result was handled. PR 69 corrects the borrow, and its local tests, strict Clippy and native/Wasm checks pass, including actual stagger and victory/loss regressions. Later feature publication always reruns the local check before push.

The initial Orbit browser input harness also lacked the existing host's performance clock. PR 78 repairs the mock and the routing regression passes.

Final local validation

Verified on 2026-10-16 with GitHub Actions disabled: all 38 local validation steps passed, including 630 Rust unit/integration/doc tests, workspace formatting, strict Clippy, the first-party dependency audit, and the runnable gameplay recipe.

Release native binaries and all fifteen release Wasm games built successfully. Native smoke runs produced validated PNGs for all fifteen examples at 180 frames, plus 1,800-frame runs for Neon Swarm, Emberline and Orbit Breaker. All web contract and real-Wasm suites, native multiplayer checks, both browser input harnesses, Rustdoc generation, the static site build and Python build-tool tests passed.

The renderer browser input mock now provides the runtime's performance clock and details settings export; the actual runtime input regression passes unchanged. Precision-return tests cover real paddle collision rewards, panel-hit eligibility, empty-bounce farming prevention, capped bonuses, invalid offsets and streak reset.

Live local browser checks confirmed Neon Swarm rendering, Emberline completing its route with a gold trial medal, and Orbit Breaker launching, scoring from panel hits and returning to ready after a lost life, with no warning/error console logs. Windows GNU and Apple ARM macOS targets passed compilation checks; this does not establish native runtime or physical-device support on those platforms.

Detailed local logs and machine-readable results are in target/gameplay40-validation/; PNGs are in target/gameplay40-smoke/ and target/gameplay40-changed-smoke/. These generated artifacts are not committed.