For the <COUNT> most important tickets `tickets/<TICKET>.md` without `<TICKET>.plan.md` and `<TICKET>.lock.md`, add the following to TODO_AGENTS.md
- "Create tickets/<TICKET>.plan.md"

Put the entries in the right `## Priority` following a mix of sensible criteria after reading `tickets/<TICKET>.md` (e.g. if ticket seems low effort => higher priority).

COUNT: 10
