The decision trail
A run the user reviews after stepping away needs its forks written down as they happen, one row each.
What a row is
The anchorloop_decision tool of pi/decision-tool.ts appends single-line, spreadsheet-safe rows to a decision trail TSV for forks, pivots, and blockers.
Completed units come from git log.
A start row marks a run that picks up another run’s trail.