Run evidence and receipts

A recorded workflow run has two files under .loom/.runtime/runs/<run_id>/: state.jsonl for lifecycle transitions and events.jsonl for contextual messages and stdout/stderr. Use loom logs or MCP loom_read_run and loom_read_events to inspect them. See Runtime logs.

loom check still writes a validation receipt. Historical workflow receipts and native captures remain documented for saved-upload workflows; fresh workflow recording does not write those formats. See Receipts contract and Web upload.