These contracts preserve the tested multi-worker and durable-runtime semantics from v0.2. They are optional and are not part of the standalone serial path.
spec-ledger-and-multi-worker.md: Work Graphs, companion joins, leases, recovery, and multi-writer boundaries.GOAL.md: task-free durable worker contract.goal-root-runtime.md: fail-closed binding for one repository and one durable goal root.
Start with the root README. Adopt an advanced profile only after an observed ownership, liveness, or concurrency need justifies its additional machinery.