40 lines
5.0 KiB
Markdown
40 lines
5.0 KiB
Markdown
# J terminal-join actual-results independent audit
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Result: the finite experiment supports the terminal-cost asymmetry diagnosis, with a real ordinary-scene overlap regression retained below. It does not establish universally improved routing, complete readability, or #32 acceptance. Static audit only: no compilation, probe rerun, GUI, source edit or publication by reviewer.
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## Evidence and checks
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Tested pin `497c1ad8b39788148c5f03bc8542d6d8e28dbc01`, compared against first probe `e7deea7039bcf31675cffbb462cfeb19d62a7e20`. Run03 command `cargo run --locked --offline -p oa-core --example auto_layout_probe`, Windows x86_64-pc-windows-gnullvm/dev: receipt exit0, failure null, inputs unchanged. Independently verified receipt log hashes. Test02 at the same pin also exit0/unchanged: six summaries132+7+13+18+2+13 =185 passed, zero failed/ignored.
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Independently parsed both raw JSONL outputs, rather than relying only on comparison-helper booleans: all37 variant Projects, complete projected nodes/ports, and per-edge first/last coordinates match exactly. Thus changed area is routed/label bounds, not changed node placement. Independently recomputed every raw pairwise axis-aligned collinear interval total in both runs (74 variant observations); all agree with emitted totals.
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All nine candidate rows report supported, identical repeated input, idempotence, passes2–10 equal first and previous, exact JSON/canonical-single-source roundtrips, no associated errors. Conservation remains true except the intentional authored-detour route reset (`authored_routes_exact=false`). Exact old/new Projects additionally confirm J changed none of these model records. Existing Command::Layout history/Undo/Redo checks pass in all nine rows; the layered candidate remains a pure Project transformation with no candidate-command history evidence. No native GUI evidence.
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## Complete changed quality-vector rows
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| Fixture / variant | Raw sharing old→J | Nonterminal sharing old→J | Other changed fields |
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|---|---:|---:|---|
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| diamond / before |136→36|100→0|none|
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| diamond / layered candidate |82→36|46→0|none|
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| crossed_bipartite / before |730→872|658→800|bends5→4; length2076→2064|
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| crossed_bipartite / layered candidate |344→187|272→115|drawing area165360→175960|
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| two_containers_reversed_children / before |200→54|200→54|none|
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| two_containers_reversed_children / baseline |148→18|148→18|none|
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| two_containers_reversed_children / reset control |148→18|148→18|none|
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These are all changes in the comparison's pre-existing12-field quality vector; the remaining30 rows are unchanged. All baseline/reset rows outside the two-container case are unchanged. Seven of nine layered candidate vectors remain unchanged. Raw strict proper crossings remain zero throughout these comparisons; no demonstrated proper-crossing reduction follows.
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The crossed-bipartite BEFORE regression is substantive, not a metric artifact: independent interval sums confirm142 additional shared units. Fewer bends and12 shorter length do not erase that readability tradeoff. Layered bipartite improves157 shared units but retains115 nonterminal units and grows routed drawing area10600 (~6.41%). Viewed its actual offline PNG: distinct vertical channels remain joined to shared horizontal routes. This is not an unambiguous-trace acceptance result. Diamond's remaining36 units are the separately classified common terminal stubs.
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The new point-contact metric has no v1 field to compare directly: do not interpret its mere introduction as newly created contacts. Current layered diamond records2 contacts and bipartite9; the independent contact worker's retrospective audit is pending at this review. Counts classify contacts and do not alone establish readability. Approximate core label bounds, missing renderer/port-label measurements, finite fixture families, axis-only grid state, sequential edge ordering and no global hard-pin optimization remain limits.
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## Binding and recommendation
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- Old raw output SHA256 `21786ae5cb668f60e9252dc884668ee5e98289443d0b3723a9ea69bf21d47fd1`.
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- J raw output SHA256 `f9ac7c1320b1cf026259bfcaf13a39e968ae317463712d8dc793375d9a4a541f`.
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- Run03 result.json SHA256 `57a1f866b2cb67880decd26becf3ac2e7715e38bbd26d3089c47dd62294afa4f`.
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- Comparison JSON SHA256 `3d5435686c2d23e97f08340693015ef66d1127726c9b5b5212678f43b3ad6b76`.
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- Geometry manifest SHA256 `0102449f730651a92233c4ae959e95e0a58036fe2b1c309224558c496241c741`; all37 image byte lengths/SHA256 verified. These are offline geometry schematics, not native captures.
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Recommendation: retain J as a successfully isolated scoring correction candidate, with explicit non-monotonic quality results. Before further penalty tuning, use the independently reconstructed contacts and the crossed-bipartite BEFORE regression as falsifiers for any stronger penalty/lane experiment. Keep exact Projects/nodes/ports/endpoints fixed and retain the entire vector, including labels and area. Do not advance directly to broad production quality acceptance based on the layered diamond improvement.
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