Chapter12 original manual rehearsal. No schedule, routine, background job, or external connection is registered. plan.json contains a proposed cadence and output boundary. The four source files are exact copies of the original office fixture. dry_run.py is an authored standard-library input gate, not Claude execution or a complete report validator. It exercises fresh, stale, and deliberately absent input scenarios without producing a report. The America/Denver timezone is explicitly selected for this proposed rehearsal; apply a source timezone decision in your own workflow.
