Use when running end-to-end experiments in scratchpad with strict traceability across scoping, planning, iterative build, migration, review, closeout, and final documentation review.
scratchpad/<Name>/<experiment_name>/ subfolder.src migration.templates/EXPERIMENT_MANIFEST_TEMPLATE.md.src/ modules.DOCUMENT_INDEX.md files are updated.manifest.md (scope, assumptions, success criteria)data_lineage.md (sources, version/date, filters, transformations)architecture.md (design, alternatives, rationale)iteration_log.md (incremental changes + outcomes)migration_checklist.md (scratchpad → src handoff)closeout.md (final review + decision)src is traceable to specific scratchpad iterations.