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python-math #36: feat(math): mode collapse — degenerate guards become the only path (item 2 parked) - #2665
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python-math #43: docs(delphi): s7 goal state + journal — mode collapse executed, battery 20/20
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… the only path (item 2 parked) ## What `GOAL_CUTOVER_READY.md` Phase 2, chunk C1 of the mode collapse — removing the engine's improved-mode branches so the Clojure-faithful behavior becomes the only code path (branch-site inventory in journal session 7). The engine now always runs the Clojure semantics on degenerate input: - `_compute_pca`: only a truly-EMPTY matrix short-circuits (Clojure runs real math on a 1x1 matrix — the every-vote step-0 oracle); the improved-mode <2 guard is deleted. - `_compute_clusters`: the <2-in-conv-participants early return and the <2-base-clusters early return (both improved-mode-only) are deleted — degenerate ticks fall through to the full base->group clustering chain exactly like `conversation.clj` (max-k always >= 2). - `conv_repness`: the <2 matrix guard is deleted — repness/consensus is computed at every size (the best-agree guarantee). ## Parking The deleted improved-mode guards are queue item 2 in `POST_CUTOVER_IMPROVEMENTS.md`; the `improvements/*` park commit — which preserves the deleted code as the reverse of this commit's guard hunks — is minted at the end of the collapse. Improved-mode guard tests are deleted with their branches (`test_degenerate_tick_parity.py`). Legacy tests unchanged and green. commit-id:13e86ed3
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What
GOAL_CUTOVER_READY.mdPhase 2, chunk C1 of the mode collapse — removing the engine's improved-mode branches so the Clojure-faithful behavior becomes the only code path (branch-site inventory in journal session 7). The engine now always runs the Clojure semantics on degenerate input:_compute_pca: only a truly-EMPTY matrix short-circuits (Clojure runs real math on a 1x1 matrix — the every-vote step-0 oracle); the improved-mode <2 guard is deleted._compute_clusters: the <2-in-conv-participants early return and the <2-base-clusters early return (both improved-mode-only) are deleted — degenerate ticks fall through to the full base->group clustering chain exactly likeconversation.clj(max-k always >= 2).conv_repness: the <2 matrix guard is deleted — repness/consensus is computed at every size (the best-agree guarantee).Parking
The deleted improved-mode guards are queue item 2 in
POST_CUTOVER_IMPROVEMENTS.md; theimprovements/*park commit — which preserves the deleted code as the reverse of this commit's guard hunks — is minted at the end of the collapse. Improved-mode guard tests are deleted with their branches (test_degenerate_tick_parity.py). Legacy tests unchanged and green.commit-id:13e86ed3
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