task_charts__matrix__off_diagonal_confusion_label

Contract

1. Domain: charts
2. Scene id: matrix
3. Source implementation scene: charts/matrix
4. Supported query_id values: single
5. The task always asks for the largest off-diagonal predicted column for one actual-class row.

Implementation

1. Registered class: trace_tasks.tasks.charts.matrix.off_diagonal_confusion_label.ChartsMatrixOffDiagonalConfusionLabelTask
2. Prompt lookup domain/scene: charts/matrix
3. Generation is deterministic from instance_seed, explicit params, prompt bundle, renderer config, and code versions.
4. Answers and annotation are produced from the same metadata execution trace.

Annotation Contract

1. Answer schema: string_label.
2. Annotation schema: bbox_set.
3. Annotation marks the off-diagonal candidate cells in the selected actual-class row.
4. Matrix headers, diagonal cells, legends, titles, and distractor text are context unless the task explicitly asks for them as annotation.

Program Contract

Program: select_label(argmax(filter(row_cells(actual_label), column_label != actual_label), value(cell))); output=string_label; annotation=bbox_set(off_diagonal_candidate_cells); scene=matrix; scope=off_diagonal_confusion_label

Candidate set: the visible matrix cells with row and column labels inside the off_diagonal_confusion_label objective scope. Operands: prompt-bound labels, categories, series names, thresholds, intervals, references, and encoded chart values, plus the task's prompt-bound target operands when present. Operation: evaluate select_label over the candidate set using the filters, comparisons, aggregations, rankings, projections, or counterfactual edits named in the program expression; generation enforces a unique final answer. Output binding: answer is the string_label value bound by string_label. Annotation witnesses: bbox_set witnesses bound by bbox_set(off_diagonal_candidate_cells). Annotation marks the off-diagonal candidate cells in the selected actual-class row. Matrix headers, diagonal cells, legends, titles, and distractor text are context unless the task explicitly asks for them as annotation. Query ids: single.

Reasoning Operations

Families: filtering, ranking

Query Details

Query id	Program signature	Answer schema	Annotation schema
single	selection.matrix_off_diagonal_argmax	string_label	bbox_set