enquire-mcp API reference - v4.0.0-rc.7
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    Variable MAX_FANOUT_CONCURRENCYConst

    MAX_FANOUT_CONCURRENCY: 4

    v3.11.6-rc.15 (audit H-1) — how many fan-out sub-queries run concurrently. Bounds the simultaneous full pipelines (graph-boost / optional reranker / embedding) so a legal 9-phrasing request can't start 9 heavy pipelines at once on the event loop. Combined with the buildTfidfIndex single-flight (which collapses the shared corpus BUILD — the expensive read+tokenize scan, the H-1 amplifier — to ONE regardless), this bounds the worst-case cold fan-out cost. Same-scope calls that overlap also share discovery/cache validation; each query still performs its own terminal generation admission because its candidate/snippet work can finish at a different time.