Function sum

scripts/agent-eval/seq-matrix.mjs:129–129

(arr, f)

// ---- round-trips ----
const sum = (arr, f) => arr.reduce((s, x) => s + (f(x) || 0), 0);
const wTurns = sum(cells, c => c.with.turns), woTurns = sum(cells, c => c.without?.turns);
const wCalls = sum(cells, c => c.with.cg.length);
const tsAll = cells.every(c => c.with.seq[0] === 'TS');