Bridge step 5. The Allen-exp seed tasks (Hongkui Zeng, Ed Lein) are hand-curated. Generalize the pattern into a reusable generator.
Acceptance:
- artifact_kind 'experiment_proposal' with schema: aims[], hypotheses[], dataset_dependencies[], protocol_summary, predicted_observations, falsification_criteria, est_cost_usd, est_duration_weeks.
- CLI: \`scidex artifacts experiment-proposal generate --hypothesis [--persona ] [--datasets ]\` produces a draft artifact.
- Generator uses persona_registry to pick a domain expert (e.g. Hongkui for connectomics, Ed Lein for SEA-AD), assembles relevant datasets via dataset_artifacts, calls Forge skills (literature_review_dataset_aware, experiment_design) under the hood.
- Backfill: convert the 2 existing Allen-exp showcase tasks into proper experiment_proposal artifacts when those tasks land.
- UI: /artifacts filter by kind=experiment_proposal; /artifact/ renders aims/protocol cards.
- Spec: docs/planning/specs/mission_experiment_proposal_artifact.md.
Why now: Allen-exp two pilots prove the pattern works. We need 50+, not 2.
Completion Notes
Auto-release: non-recurring task produced no commits this iteration; requeuing for next cycle