Your workspace
Every plan you have frozen, and the seal on it
A session stores the conditions exactly as they were when you committed it, plus the engine verdict that told you to. Filter and paging live in the URL, so a filtered view is a link you can send.
No sessions here yet
Open a break, pick an hour on the ribbon, and commit it. That writes a real row with a real conditions snapshot and the first link of its integrity chain. Pick a break.
Sessions are owned by an anonymous HTTP-only cookie minted for this browser. There is no account, and no session of yours is reachable from another browser. Clearing the cookie loses access to these rows — which is why the seal chain and the exportable brief matter more here than the database row does.
Bands: Get in the water ≥70%, Worth the drive ≥50%, Marginal ≥30%, Stay home below that, Nothing to surf when there is no usable swell.