[Ernie3]

Summary

Sets up merge gating, Cursor Cloud Agents, and shared AI conventions for Demonator15. No robot behavior changes — swerve refactor and unit tests come in a follow-up PR.

What's included

CI and Gradle

• GitHub Actions (.github/workflows/ci.yml): ./gradlew build on push/PR to main using WPILib robot code CI (wpilib/roborio-cross-ubuntu:2025-22.04).
• README CI status badge linked to that workflow.
• Gradle: Java 17 test launcher + Foojay toolchain resolver so JUnit/WPILib vendor JNI tests run reliably locally and in automation.

Cursor Cloud

• .cursor/environment.json + cloud-install.sh: idempotent Cloud Agent Build runs ./gradlew test.
• Point the Demonator15 cloud environment at .cursor/environment.json on main after merge and run a Build.

Agent / team conventions

• .cursor/rules/ — focused rules (not one giant file):
  • frc-project.mdc — always on: repo layout, WPILib/Gradle, PathPlanner naming, secrets, CI.
  • frc-commands-subsystems.mdc — src/main/java/**: command-based structure, RobotContainer, subsystem vs commands/.
  • frc-unit-tests.mdc — src/test/**: JUnit 5, sim extension, test style (activates once swerve tests land on main).
• AGENTS.md — build commands and architecture summary for Cloud Agents and contributors.

Test plan

• CI workflow passes on this PR
• After merge, README badge reflects CI on main
• (Optional) Cursor Cloud environment Build succeeds with .cursor/environment.json on main