The current context window is nearing its rollover threshold. Before important details fall out of the live tail, use context_notes to save a concise durable notebook: current task state, decisions, changed files, evidence, blockers, and exact next steps. Keep the notebook a compact index with one line per item, no copied logs or file bodies, and replace stale entries instead of appending so it stays well under the 16 KiB cap. Do not call new_context until the notebook is current.