LOCKED PROMPT / 1.0.0

Interactive Historical Explainer

This is the model-neutral public instruction. Run settings belong in the recorded attempt, not this challenge.

prompts/challenges/interactive-historical-explainer.md

# BuildArena Challenge

Role: Senior product engineer.

Project: Interactive Historical Explainer v1.0.0

Objective: Evaluate a model's ability to implement Interactive Historical Explainer as a bounded, evidence-backed product challenge.

Required outcome: A sourced historical experience with timeline, map, references, narration, exploration, and knowledge checks.

Functional requirements:
- A sourced historical experience with timeline, map, references, narration, exploration, and knowledge checks.

UX requirements:
- Responsive, readable interface
- Keyboard-accessible core controls

Technical requirements:
- Production build succeeds
- No secrets or private data in the artifact

Constraints:
- Allowed: Local sample data; Established framework utilities
- Forbidden: Automated model execution; Unreviewed private data; Unsupported production claims

Build order: Inspect the environment; establish the smallest vertical slice; verify the central workflow; add secondary requirements; run production validation.

Evidence to return: Commands, test results, screenshots, core-flow recording, known bugs, missing requirements, human intervention, final commit, and deployment URL only when authorized.

Claims prohibited without proof: complete, production-ready, fully working, bug-free, accessible, responsive, performant.