Open-source projects broadcast their roadmap through their commit history: release branches get cut, version strings get bumped, changelogs get staged, and dependency pins move — all publicly, often weeks before a release announcement. You watch the repositories tied to each open market and treat a cut release branch as a strong, dated signal. For companies that develop in the open, this is the closest thing to reading the internal schedule.
Markets on Polymarket where repository-activity leading indicator is the natural play: