{
  "milestones": [
    {
      "version": "v0.4.0",
      "title": "Full User-Space ISA",
      "status": "released",
      "date": "Jun 2026",
      "items": [
        "All SPARC V9 integer instructions implemented and verified",
        "All floating-point instructions (single, double, quad precision)",
        "VIS 1 and VIS 2 instruction set extensions",
        "Register window management (spill/fill traps)",
        "Comprehensive ISA test suite: ~12,000 test cases"
      ]
    }
  ]
}