Three-source reuse preserves the checked prediction calculation
All twelve known-answer cases passed, using 36 saved-report merges and no integration. The controls took 15.45 seconds. Their 96 report reads and 72 manifest/receipt reads match the frozen allowance exactly.
Only provenance bookkeeping changes from the earlier two-source adapter: three manifest/receipt pairs are checked instead of two. A focused source comparison verifies that every numerical operation remains unchanged. Both the all-provider and earlier-future-only paths pass their training, domain, support and final known-truth checks.
The third family's material in these controls explicitly aliases a qualified direct-source fixture. It tests a third provenance path; it is not a third independent observation or an additional physical instrument.
The qualified adapter can now check the complete 48-region rebuild from the earlier, direct and serial-future studies. Every region and all six case covers must pass the original target. These controls alone establish neither that target nor useful recording-length error ranges.