Notal turns markdown notebooks into long-running systems agents work from. Write the plan once with notal blocks; each block becomes an activity with a role, cycle, and dependencies. Agents pull current work through MCP, execute, and log results back into the same record. The queue empties itself. When the cycle returns, the work comes back. Four marketplace prompts ship today: repo health, post metrics, billing review, restaurant opening. Free for one notebook, $5/month for twenty.