Research: rank-eight coded-helper endpoint and complete mixed-cost obstruction (no new kappa)

research/coded-helper-early-end8/CLAIM.md

@@ -0,0 +1,26 @@
+# User-selected PR781 follow-up
+
+The user selected PR781 and PR838 for substantial completed contributions.
+This branch handles the coded-helper construction; PR838's follow-up is PR865.
+No new random track is inferred for this explicitly selected task.
+
+Original PR781 pinned and freshly reproduced. Initial promoted transfer found
+five illegal zero-frame reads from entering helpers; fully charged entrance and
+gauge repairs passed both orientations. Concurrent PR855 then completed two
+full provider embeddings and a packing screen. Its source was read, retained
+and freshly reproduced before extending its cleanup lifetime.
+
+New object: helper 448's end-B inverse row and rank-eight early endpoint in
+both placements and both providers. Method: exact two-read early restoration,
+internal premix, original all-column native audit; independent binomial
+intervals, Cartesian pattern census and mixed-variant DP for the complete cost.
+Stopping rule: all four new words, native/certificate controls and complete
+72-call mixture coverage. No general frame search or new topology is claimed.
+
+Base f567884aeb8851b6e794af1184119a3bfbe1e631. No pinned sprint issue found;
+claim is local. NeoKazuya's PR855 is credited and not described as superseded.
+No phase/global nomination is pursued after the favorable full budget rejects
+every mixture. Publication overlap was refreshed through PR888; main remains f567884a.
+PR855 remains the directly consumed predecessor. Other new proposals concern
+different words, owner controllers, Lean proofs or independent checks and are
+not imported. No coded-core or residue-potential-method priority is claimed.

research/coded-helper-early-end8/CONTEXT-SELECTED.json

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