task_three_d__street__same_road_arm_reference_label

Summary

• Domain: three_d
• Scene id: street
• Scene package: street
• Supported query_id: single
• Answer type: option_letter
• Annotation schema: bbox

Program Contract

Program: select(label(candidate_street_objects, predicate=road_arm(candidate)==road_arm(reference_object))); scene=street; scope=same_road_arm_reference_label

Candidate set: the visible 3D objects, surfaces, room/street/warehouse structures, spatial anchors, markers, and labeled options inside the same_road_arm_reference_label objective scope. Operands: visible scene state and prompt-bound operands named by label, candidate_street_objects, predicate, road_arm, candidate, reference_object, street, same_road_arm_reference_label. Operation: evaluate select over the candidate set using the finalized 3D scene state, camera projection, object identities, spatial relations, counts, distances, or option-selection constraints encoded in the program expression; generation enforces a unique final answer. Output binding: answer uses the option_letter schema; generation binds a unique final answer. Annotation witnesses: annotation uses the bbox schema; the prompt/annotation contract defines the minimal visual witnesses. Query ids: single.

Reasoning Operations

Families: topology

Contract

The image shows a synthetic perspective 3D street intersection or T intersection with roads, sidewalks, crosswalk markings, unlettered street context, one red-boxed reference street object, unlettered street-object candidates, and a below-scene text option panel.

Each instance renders 4 unlettered candidate street objects. The reference object is unlettered and marked with a red bounding box. Candidate object types exclude the reference type. Exactly one candidate has the same finalized road_arm metadata as the reference. Distractor candidates are placed on other present road arms, and T-intersection layouts remove candidates from the missing road arm.

Street context can include buildings, storefronts, trees, shrubs, traffic lights, street signs, and benches. Context objects are visual context only and are excluded from answer candidates.

Annotation Contract

Annotation is the bounding box of the selected street object in the scene. The red reference box, road markings, context objects, option panel, and option text are not annotation.

Prompt And Trace

The prompt bundle is three_d_street_v1 under src/trace_tasks/resources/prompts/three_d/street/. The trace records camera pose, projection frame, scene variant, intersection layout, full-bleed floor bounds, present/missing road arms, reference object id/type/name/road arm, candidate road arms by label, same-road-arm flags by label, selected object id/type, projected object bboxes, and option-panel descriptors/bboxes.

Determinism

Generation is deterministic from instance_seed, explicit params, config defaults, prompt bundle, and code versions. Answers and annotation come from the same finalized 3D street scene trace.