feat(spec): `ExecutionStepMetrics` gains an optional `failures` slot; `FlowRunSummary.failed` is declared as the fold INCLUDING what a delegating node rolled up from its child (#15617, spec half) - #16635

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claude/issue-15617-execution-step-metrics-failure-slot

Sep 8, 2026

Commits on Sep 7, 2026

wip(spec): ExecutionStepMetrics failure slot + FlowRunSummary.failed fold reconciliation (#15617 spec half)
claude
committed
27fa9f8
chore(spec): regenerate authorable-surface + docs references for the ExecutionStepMetrics failure slot (#15617)
claude
committed
dfe92a7
fix(spec): contract review R1.1 on #15617 — narrow the header roll-up clause to the totals that roll, drop the acted analogy at the failed-child boundary, state the mixed case and the third absence…
claude
committed
aebacb8
chore(spec): regenerate docs references for the R1.1 describe wording (#15617)
claude
committed
7653f81