bulk_harvest's Phase B has been a ProcessPoolExecutor over DISTINCT binaries (per-binary flock,
per-worker result files, compute_fleet=False) since Phase 23 — but welded to Phase A's LLM drafting.
Family sweeps stage drafts differently (family_sweep --stage-only), so the farm was UNREACHABLE from
that path, and SESSION-20 gated 389 + 268 + 104 members SERIALLY for no architectural reason (~8-16x
throughput loss on a 32-thread box). This is a thin adapter: same gate_stage.run_gate, same
per-binary lock, NO new gate logic.
Also fixes the phantom-dir bug at source: a bare .run/sweep/*/ glob matches gate_stage's own
intermediate ladder dirs (-cn/-cast/-rc/-s2in/-uni) and calls them as binaries — 24 phantom
PARTIAL 0/1 lines that inflated one run's notbanked from 0 to 56. Requires config/splat.<bin>.yaml
to exist (R33/R36: derive the binary set, never glob it). Smoke-tested: the phantom is skipped and
named, real binaries kept.
§89 records both throughput rules the project already had and was not following.
Drew T