0-5-3-understand-inter-thread-happens-before

name	0.5.3-understand-inter_thread_happens_before
description	[0.5.3] The subset of happens_before relations that cross thread boundaries, established by synchronizes_with connecti

understand-inter_thread_happens_before

CALL NUMBER: deep_happens_before_relat.inter_thread_happens_before DEFINITION: The subset of happens_before relations that cross thread boundaries, established by synchronizes_with connections between release and acquire operations.

Invoke this skill to understand inter_thread_happens_before down to its primitives. The RELATIVE ROOT below is the least-fixed-point closure of everything it bundles from — the full import cone, grouped by the lib each prim comes from. Projected from a prover-typed KB (MAP/SWI-Prolog consistency gate): every reference below resolves.

THE RELATIVE ROOT (the import cone, by lib)

from deep_happens_before_relat

• happens_before_order (d1): A transitive, irreflexive partial order over operations in a memory model that defines which operations must appear to precede others from any thread's perspective.

CONSUMERS (what needs this)

hb_interrupt_visibility, hb_reads_from, program_order, sw_inter_thread_happens_before

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Projected from the concurrency synchronization primitives and memory models KB (407 concepts / 477 relations) — consistency-typed by MAP; the facet list after the colon IS the cross-lib dependency web.

(leaf — this is an actual skill.)