task_charts__contour_density__density_extremum_region_label

Contract

1. Domain: charts
2. Scene id: contour_density
3. Source implementation scene: charts/contour_density
4. Query ids: highest_density_region_label, lowest_density_region_label
5. Semantic query details are recorded in query_id and trace params.

Implementation

1. Registered class: trace_tasks.tasks.charts.contour_density.density_extremum_region_label.ChartsContourDensityDensityExtremumRegionLabelTask
2. Prompt lookup domain/scene: charts/contour_density
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.
3. Annotation should mark the minimal visual witnesses required by the task, following the cross-domain annotation policy.
4. Renderer context such as axes, decorative labels, titles, and background treatments is metadata unless the task explicitly asks for it as annotation.

Program Contract

Program: arg_extreme(region_label, density_level(region_label), direction={highest,lowest}); output=string_label; annotation=bbox(answer_region); scene=contour_density; scope=density_extremum_region_label

Candidate set: the visible contour-density regions, guide labels, and marked areas inside the density_extremum_region_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 string_label value bound by string_label. Annotation witnesses: bbox witnesses bound by bbox(answer_region). Annotation should mark the minimal visual witnesses required by the task, following the cross-domain annotation policy. Renderer context such as axes, decorative labels, titles, and background treatments is metadata unless the task explicitly asks for it as annotation. Query ids: highest_density_region_label, lowest_density_region_label.

Reasoning Operations

Families: ranking

Query Details

Query id	Program signature	Answer schema	Annotation schema
highest_density_region_label	selection.density_extremum_region_label	string_label	bbox
lowest_density_region_label	selection.density_extremum_region_label	string_label	bbox