nx_search_neutrality_gate.nx

nx_search_neutrality_gate.nx -- the CONTENT-NEUTRALITY CHARTER as a gate. module: nishi-core.search.neutrality_gate depends: nx_bm25.nx (the real inverted-index/tf kernels on the live path) capability: GATE OPERATOR CHARTER (2026-06-10): "we want to be agnostic and not filter out anything that our search returns -- the user may find value; no dead-internet walls like current providers; we have freedom of speech and respect it." Mechanical meaning, proven here against the SAME index kernels the live SERP uses (never a parallel mock): N1 COMPLETENESS -- every indexed doc that matches the query IS in the result set. Retrieval drops nothing. N2 ORDER-NOT-EXCLUDE -- the ranked output contains EVERY doc (zero-match docs rank below all matches -- the live SERP's relevance hard-gate ORDERS, it never REMOVES). N3 SUPPRESSION-TAMPER RED -- a simulated host-blocklist lane (what incumbents do to vk.com/bunkr-class hosts) MUST be caught: the checker sees the missing doc and flags RED. A filter cannot creep in silently. Gate = N1 PASS && N2 PASS && N3 tamper DETECTED. One durable machine row to knowledge/status/search_neutrality.log for the Examiner (arc NEUTRALITY).