artifact-arena

# Artifact arena ## Contract | Field | Bound contract | |---|---| | Trigger | User runs /artifact-arena to generate and judge competing artifact implementations. | | Authority | Reversible local: writes only local candidate worktrees and the synthesis artifact; rollback is discarding candidate worktrees and deleting the synthesis note. No remote mutation. | | Side effect | Spawns isolated candidate workers, each writing to its own local path. No remote, credential, VCS, or published mutation. | | Done | One verified synthesis with provenance and rejection reasons. | ## Inputs - Task prompt (required): the artifact each candidate must produce, stated as a single contract. - Candidate count N (required): how many parallel candidates to spawn. Minimum 2. - Model pool (optional): models for candidates and the cross-judge. When absent, use available models, preferring a different family for the cross-judge than the parent. - Shared grounding (optional): a path to context every candidate reads before producing. ## Procedure 1. **Frame.** State the artifact each candidate produces. Derive a rubric of 3-6 concrete gradeable criteria; each criterion names an observable behavior, not a vague quality. The rubric is the picker's tool; candidates see only the task prompt, not the rubric. Assign each candidate its own output path (a git worktree where possible, otherwise a unique local directory). N candidates sharing one path is shared mutable state and corrupts results. Done when: ...