// Phase 286 P2: Pattern4 → Frag PoC minimal fixture
//
// Purpose: Test Pattern4 (Loop with Continue) using Plan/Frag SSOT
// Expected output: 6 (sum of 1+2+3, skipping i==0)
//
// Structure:
//   i = 0, sum = 0           // pre-loop init
//   loop(i < 4) {            // loop variable condition
//       if (i == 0) { i = i + 1; continue }  // continue at i==0 (SINGLE continue)
//       sum = sum + i        // carrier update (accumulator pattern)
//       i = i + 1            // loop increment
//   }
//   return sum               // return 1+2+3=6
//
// PoC Goal:
//   Pattern4 → DomainPlan → CorePlan → Frag → emit_frag()
//   (Skip: JoinIR → bridge → merge)
//
// Design Note:
//   - Uses only Compare (==, <) and Add (+) operators
//   - Avoids Mod (%) which lacks Plan/Frag support guarantee
//   - Single continue condition for Plan line PoC
//   - Accumulator pattern for carrier (sum = sum + i)

static box Main {
    main() {
        local i, sum
        i = 0
        sum = 0
        loop(i < 4) {
            if (i == 0) { i = i + 1; continue }
            sum = sum + i
            i = i + 1
        }
        print(sum)
        return 0
    }
}