task_charts__combo_mark__series_threshold_crossing_label

Contract

1. Domain: charts
2. Scene id: combo_mark
3. Source implementation domain/scene: charts/combo_mark
4. Query ids: primary_first_above_threshold_label, primary_first_below_threshold_label, line_first_above_threshold_label, line_first_below_threshold_label
5. Semantic query details are recorded in query_id and trace params.

Implementation

1. Registered class: trace_tasks.tasks.charts.combo_mark.series_threshold_crossing_label.ChartsComboSeriesThresholdCrossingLabelTask
2. Prompt lookup domain/scene: charts/combo_mark
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 target-series mark at the answer category only.
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: first_x_label(series, threshold, crossing_direction={above,below}); output=string_label; annotation=point(answer_mark); scene=combo_mark; scope=series_threshold_crossing_label

Candidate set: the visible primary marks, secondary-line marks, and shared category labels inside the series_threshold_crossing_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 first_x_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: point witnesses bound by point(answer_mark). Annotation marks the target-series mark at the answer category only. 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: primary_first_above_threshold_label, primary_first_below_threshold_label, line_first_above_threshold_label, line_first_below_threshold_label.

Reasoning Operations

Families: filtering, comparison, ranking

Query Details

Query id	Program signature	Answer schema	Annotation schema
primary_first_above_threshold_label	selection.threshold_crossing_x_label	string_label	point
primary_first_below_threshold_label	selection.threshold_crossing_x_label	string_label	point
line_first_above_threshold_label	selection.threshold_crossing_x_label	string_label	point
line_first_below_threshold_label	selection.threshold_crossing_x_label	string_label	point