v0.19.1 — Public alpha research release

Superseded by v0.19.2. The cross-platform CI test fix is included in all v0.19.2 source and materials archives. Please use v0.19.2.

Initial public alpha of Future Prediction Bench: probability forecasting protocols, delayed-reward rollout preparation, and verifiable software task environments.

• MIT license, maintainer metadata, third-party notices, and repository links.
• English documentation with a five-minute offline demo and detailed research records.
• Public packaging works from a clean checkout without the optional Chinese briefing.
• Forecasting adapters cover MLB and USGS; software environments include Docker and experimental QEMU backends.

Local validation: 711 tests ran successfully with 11 optional checks skipped. The 443-file source archive, materials audit, distribution builds, installed-wheel checks, and offline demo passed.

This is an infrastructure research prototype. It includes scripted integration evidence, but no formal forecasting model results, hosted leaderboard, or complete GPU training pipeline. Text trajectory exports remain trainer_ready=false.

See README.md, CHANGELOG.md, and docs/VALIDATION.md for usage and scope.

CI compatibility note: The initial Linux run exposed a Python JSON decoder depth assertion that varies by build. The assertion has been corrected on main; input rejection behavior is unchanged. Published v0.19.1 archives retain the original assertion. Use v0.19.2 for cross-platform test execution.