Group observations by exact normalized instant, retaining arbitrary fractional precision and offset equivalence. Coalesce equivalent assessments and all supporting Evidence; report conflicting latest assessments as unknown with verifier-result-ambiguous. Use the same instant comparison for freshness and future checks.
Replace first-input-wins coverage with permutation, provenance, offset, sub-millisecond ordering, and future-clock regressions, including the public MCP workflow. Validation: focused reconstruction/offset tests and MCP workflow passed; converted JSON Schema validation, typecheck/lint, and docs checks passed. Full suite and real-provider lanes were not run.