GO Race Start¶

SOURCE-ONLY GitHub pre-release. This is NOT a playable game build. No compiled Win64 EXE, Android APK/AAB or installed game is included. GitHub source archives are not installers. This preview has zero executable binaries, no qualified cooked Unreal circuit and no installed real-driving evidence.

New gameplay source since v0.5.74¶

Real GameMode RaceStartLights enforces a deterministic 3 → 2 → 1 → GO sequence for Quick Race, Time Attack and Career starts. Only a valid circuit, verified grid placement, current physical driver and unpaused/unfocused event consume the red countdown.
RaceProgress receives only post-GO elapsed time on the exact frame crossing three seconds. Red frames cannot become lap records, future career credits, achieved sectors or an artificial head start.
Both player driving and experimental rival control, genuine ordered checkpoint scoring and paid recovery/teleport are authorized by one shared GameMode green flag. Invalid/hitch frames (>0.5s), pause, OS focus loss and menu interruption do not consume the sequence.
New accepted race restart resets lights and official elapsed time. Canvas HUD shows START LIGHTS 3/2/1 then short GO after the authentic clock, not via its own independent cosmetic timer.
New strict C++20 regression compiles actual production RaceProgress.cpp to verify exact crossing-frame remainder, no free elapsed red seconds, invalid-frame pause, correct restart and GO banner expiration. Python contracts verify production Unreal GameMode, player pawn, rival, recovery, checkpoint and HUD wiring.

Release source qualification¶

Publication requires independently successful immutable source-commit checks on Ubuntu, Windows and macOS, all strict C++20/CTest, Unreal source-binding Python tests, PowerShell synthetic candidate/provenance rejection checks and GitHub Pages documentation integrity. The source publisher refuses an advanced main, changed tag, missing warnings, a mismatched published predecessor v0.5.74 or executable assets.

Playable-game work is still unverified¶

A licensed Unreal Engine 5.8 Editor/UHT and Game-target compile, original actual .umap authoring and cook, installed Win64 EXE and Android APK/AAB, real chassis physics/start-frame tick-order tests, controller and phone pause/focus/multitouch QA, package provenance and hands-on device screenshots remain mandatory. The authorized UE workstation workflow exists in source but its installed build evidence has not been verified.

See race-start QA and playable gate #148.

SOURCE-ONLY. NOT a playable game build. zero executable binaries. Source archives are not installers. Original LateBrake source: BSD-3-Clause; Unreal components and assets are governed by separately applicable Epic terms.