task_charts__uncertainty_band__band_width_extremum_x_label

Public Contract

1. Domain: charts
2. Scene: uncertainty_band
3. Source file: src/trace_tasks/tasks/charts/uncertainty_band/band_width_extremum_x_label.py
4. Prompt assets: src/trace_tasks/resources/prompts/charts/uncertainty_band/charts_uncertainty_band_v1.json
5. Supported sampled query_id: widest_band_x_label, narrowest_band_x_label

Program Contract

Program: arg_extreme(x_label, width(vertical_interval(target_series_band_at_x)), direction={widest,narrowest}); output=string_label; annotation=segment(answer_band_lower_upper_span); scene=uncertainty_band; scope=band_width_extremum_x_label

Candidate set: the visible uncertainty bands, central series marks, and x labels inside the band_width_extremum_x_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_extreme 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 unspecified value bound by string_label. Annotation witnesses: unspecified witnesses bound by segment(answer_band_lower_upper_span). The Annotation Contract below defines the prompt-facing witnesses. Query ids: narrowest_band_x_label, widest_band_x_label.

Reasoning Operations

Families: ranking, formula_evaluation

Contract Notes

This task uses the current source layout. The public task file owns target-series selection, extremum direction, answer binding, annotation binding, query metadata, and prompt slots; scene-local shared code only provides uncertainty-band data structures, rendering, prompt, and projection primitives.

Query Details

Query id	Program signature	Answer schema	Annotation schema
narrowest_band_x_label	argmin_x(width(vertical_interval(target_series_band_at_x)))	string_label	segment
widest_band_x_label	argmax_x(width(vertical_interval(target_series_band_at_x)))	string_label	segment