spillwavesolutions python3 "${CLAUDE_PLUGIN_ROOT}/scripts/ots_common.py" write-session \
--id software_engineer__atlas__001 \
--period 2026-08-21T14 \
--agent-name atlas --agent-role software_engineer \
--author "$SECOND_BRAIN_IDENTITY" --bundle "$SECOND_BRAIN_ROOT"
Hour nodes come from tick-hour, not from session writes. --ensure-spine is off by default. Pass it only for fixtures.
A session that crosses an hour boundary closes its segment and opens the next (close-segment --period YYYY-MM-DDTHH), so each segment belongs to exactly one Hour.
Host JSONL is ingested by ots_tail_jsonl.py as .source.jsonl (see ots-tail). Pipeline: tail → tick-hour → summarize-hour → rollup → overnight pointers (separate).
Never write frontmatter by hand. Children before parent aggregates. Do not invent summary prose in rollup — the model proposes, the script only links.