diff --git a/handoff-factor-diagnostics.md b/handoff-factor-diagnostics.md
index d6f7c5d..df31684 100644
--- a/handoff-factor-diagnostics.md
+++ b/handoff-factor-diagnostics.md
@@ -8,4 +8,8 @@ Scope is L3 mathematical behavior, pure memory/caller data. The new candidate mo
 
 Evidence so far: initial47 tests failed for the missing API; first implementation46 passed and one strict floating-zero assertion failed, corrected to a stated1e-15 tolerance without clipping values. A genuine extreme-rank scaling regression was reproduced and fixed by ranking original values. An affine-equivalent IC case reproduced enormous IR/t from rounding dispersion, fixed with the public32eps resolution policy. Independent reviewer found two representable-offset Pearson errors; both were reproduced and fixed by translate-before-scale. Latest54 new plus16 old tests=70 passed; final whole-core run1093 passed in12.82s with1166 existing pandas deprecation warnings. Targeted Ruff and final module-only mypy passed. Reviewer rechecked the two numeric fixes with tiny independent samples, no new blocker.
 
-This remains an unshipped candidate: document and full applicable checks, stable revision binding, platform thin consumption and synthetic UI evidence must be completed before final delivery gates. No source/provider/NAS query, production ETL, migration, release, deployment or trade has been authorized by this increment. Reuse this same lifecycle/branch/PR across further windows; do not treat a push as final delivery.
+The implementation was saved and pushed as 69383a30b079790018edb25679be08460a5ab17f in Draft PR #21 (https://gitea.puyuanfh.cn/ageorge156/quant_engine/pulls/21). The existing platform delivery now consumes that exact prepared archive through an unwired thin adapter. Its 25 tests call this real core; 9 isolated HTTP tests and 21 actual-component tests pass. The local browser displayed daily IC [1, -0.5, approximately 0], mean 1/6, actual daily pairs, pooled pairs, constant/missing reasons and holding-period valid days [3, 2, 1]; source failure cleared old results and explicit retry restored them. The prepared-report boundary rejects conflicting counts, intervals and method claims without recalculating statistics. Platform changes remain its separate, unmerged delivery; this is evidence for a consumer, not combined production acceptance.
+
+The bounded pure-library increment is code complete and reviewed. The next operation is the central delivery gate for this core PR; its receipt, not this handoff, establishes Ready/CI/merge/main acceptance and cleanup facts. After successful core delivery, the platform will bind the accepted core source revision while retaining candidate and unestablished qualifications. Main full-suite evidence remains the unchanged 1093-pass candidate run above until the gate establishes its own validation receipt.
+
+No source/provider/NAS query, production ETL, migration, release, deployment or trade occurred in this increment. Production data/source/PIT/algorithm admission is outside this pure-library delivery and remains explicitly unestablished. The broader platform/M0–M5 delivery remains unfinished. Reuse this same lifecycle/branch/PR; a push alone is not completion.