task_charts__style_legend__x_position_extremum_series_label

Contract

1. Domain: charts
2. Scene id: style_legend
3. Public task id: task_charts__style_legend__x_position_extremum_series_label
4. Supported query_id: x_position_highest_series_label, x_position_lowest_series_label

Implementation

1. Registered class: trace_tasks.tasks.charts.style_legend.x_position_extremum_series_label.ChartsStyleLegendXPositionExtremumSeriesLabelTask
2. Prompt bundle: charts_style_legend_v1
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: point.
3. Annotation marks the selected plotted marker at the queried x-axis label.
4. Renderer context such as legends, axes, decorative labels, titles, and distractor text is metadata unless the task explicitly asks for it as annotation.

Program Contract

Program: arg_extremum(series, value(series, x_position), direction={highest,lowest}); output=string_label; annotation=point; scene=style_legend; scope=x_position_extremum_series_label

Candidate set: the visible plotted series/marks and legend entries inside the x_position_extremum_series_label objective scope. Operands: prompt-bound labels, categories, series names, thresholds, intervals, references, and encoded chart values, plus the active query id's comparator, direction, target role, or extremum focus when present. Operation: evaluate arg_extremum 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: point witnesses bound by point. Annotation marks the selected plotted marker at the queried x-axis label. Renderer context such as legends, axes, decorative labels, titles, and distractor text is metadata unless the task explicitly asks for it as annotation. Query ids: x_position_highest_series_label, x_position_lowest_series_label.

Reasoning Operations

Families: ranking

Query Details

Query id	Program signature	Answer schema	Annotation schema
x_position_highest_series_label	argmax(series, value(series, x_position))	string_label	point
x_position_lowest_series_label	argmin(series, value(series, x_position))	string_label	point