Read the build loop's decision log. Use when the user says "show the logs", "what did the loop do", "why did it pick opus", "why did this task escalate", "open the run log", "compare this version with the last one", or "prune old logs". Answers straight from the run's events when the question is narrow, renders one local, self-contained HTML page when the user wants to browse, prunes runs past retention, and prints the cross-run summary that crystallize reads.
