perf(engine): topology-index cross-branch reuse + referenced-edges build#276

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ragnorc/omnigraph-query-latency

Commits on Jun 15, 2026

test(engine): add read-path IO instrumentation seam for warm-read cost tests
ragnorc
committed
test(engine): warm same-branch read should reuse the coordinator (red)
ragnorc
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perf(engine): same-branch reads reuse the warm coordinator (Fix 1)
ragnorc
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test(engine): warm query should validate the schema contract once (red)
ragnorc
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perf(engine): validate the schema contract once per query (finding A)
ragnorc
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test(engine): warm + multi-table reads should do zero manifest scans (red)
ragnorc
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perf(engine): open touched tables by location+version, not via the namespace (Fix 2)
ragnorc
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test(engine): cost-budget coverage for branch-warm and stale-refresh reads (matrix)
ragnorc
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Commits on Jun 16, 2026