feat(reports): leftover-map coverage on grouping comparison graphic (v2.63.0)

[seonghobae]

Summary

Caption persisted leftover-map complete-case coverage on the grouping-comparison leftover-map graphic when leftoverMapCoverageCounts returns usable integers (ADR 0306 / v2.63.0). Post coverage remains independent of item/incomplete coverage. No SQL/new columns and no coverage inference from marker/pair counts or other leftover-map statistics.

Live authority

• parent/base: #844@0882cc90a1af545d9d67e0965134c7686a119671
• current product head: 8d37896a5246cd0045a9c210b504b95941a78f84
• PR: open / Draft
• the current tree preserves feat(reports): leftover-map coverage on grouping comparison graphic (v2.63.0) #845 ADR 0306/v2.63.0 and inherits feat(reports): preserve grouping-comparison graphic delta for serialized successor #841's ADR 0304 Proposed regression through feat(reports): leftover-map axis share on grouping comparison graphic (v2.62.0) #844

Parent convergence

The old child was authored against #844 c25b0551.... After #844 moved, #845 inherited tests/test_compare_graphic_adr_status.py, preserved its own Amended by ADR 0305 / ADR 0306 text while changing ADR 0304 Accepted → Proposed, then recorded current #844 as the second parent in 8d37896a.... The branch moved only by non-force fast-forward; no valid product delta was dropped.

Historical 464-test/oxlint/py_compile evidence predates this exact head and is not transferred. Exact-head required/frontend/browser/a11y and PostgreSQL/k6 evidence plus independent approval remain outstanding. Any direct descendant must be reconstructed against this head before its predecessor evidence can transfer.

Product invariants

• Missing, non-integer, negative-used, non-positive-scored, or used-greater-than-scored post coverage omits only the comparison graphic coverage caption.
• 0 of M remains valid when stored counts satisfy the contract.
• Axis-share display remains independent.
• This increment does not add item or incomplete coverage captions.

Keep Draft until exact-head evidence and independent approval exist. No self-approval, gate bypass, force push, or destructive rebase.

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[seonghobae]

Cycle 2026-08-31 04:40 KST. Writes work as seonghobae. Head 7c026df (v2.63.0 / ADR 0306) stacked on #844 @ 95538f9.

Caption leftover-map complete-case coverage on the grouping comparison leftover-map graphic from already-named leftover_map_coverage. Distinct accessible name Leftover map comparison graphic coverage. Omit leftover-map item coverage and leftover-map incomplete coverage on that comparison plot this increment. No SQL; no new columns. Never invent a leftover score or a theta.

Independent APPROVE is required. Do not self-approve. Do not squash-merge onto the unprotected leftover base. Issues #79 and #87 stay open. #96 is already closed.

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no bugs or issues to report.

[seonghobae]

Cycle write probe 2026-08-31: leftover-map comparison graphic coverage (#845 @ 7c026df) remains stacked for independent APPROVE. Next buyer gap is leftover-map item complete-case coverage on that comparison graphic (distinct from strip Leftover map comparison item coverage). Do not self-approve. Synthetic fixtures only.

[seonghobae]

Cycle write probe 2026-08-31: leftover-map comparison graphic coverage (#845 @ 7c026df) remains stacked for independent APPROVE. Next buyer gap is leftover-map item complete-case coverage on that comparison graphic (distinct from strip Leftover map comparison item coverage). Do not self-approve. Synthetic fixtures only.

[seonghobae]

Cycle retry (2026-08-31): GitHub write probe on leftover-map comparison-graphic stack. Independent APPROVE still required; this comment is not a review. Next increment is ADR 0307 / v2.64.0 leftover-map item complete-case coverage on the grouping comparison leftover-map graphic (distinct aria-label "Leftover map comparison graphic item coverage"). Do not squash-merge this stack onto unprotected bases. Leave open.

[seonghobae]

Stacked next increment opened as leftover-map item complete-case coverage on the grouping comparison leftover-map graphic (ADR 0307 / v2.64.0) on feat/leftover-map-compare-plot-item-coverage-v2640 @ 4779764. Distinct accessible name Leftover map comparison graphic item coverage. Leave #845 and the stacked increment open for independent review. Do not squash-merge. This comment is not a review.