Multi-agent coding workflows fail when coordination is treated as scheduling only. A task queue can say Agent A owns docs and Agent B owns billing. It cannot prove that a billing refactor did not change assumptions in docs, tests, API clients, or shared config.
sequenceDiagram participant A as Agent A participant B as Agent B participant N as Nool A->>N: nool announce intent B->>N: nool announce intent A->>N: nool discover conflicts B->>N: nool task pick A->>N: nool debug blast-radius B->>N: nool debug blast-radius A->>N: nool propose B->>N: nool propose
The Nool cycle starts with explicit work ownership. Create work with `nool task create --name "..." --desc "..." --priority 1 --solidify`. Agents inspect the queue with `nool task list --compact`, claim with `nool task pick --id <id> --solidify`, and finish with `nool task finish --id <id> --solidify`. If a task cannot proceed, `nool task block --id <id> --reason "..." --solidify` is better than silent abandonment.
Intent comes next. `nool announce intent --intent "..." --target-nodes "src/**" --thread <name>` tells other agents what you expect to touch. `nool announce with-context --intent "..." --context-file context.yaml` captures decisions, constraints, and test coverage when a plain announcement is not enough.
Before proposing, run `nool discover conflicts --compact` and `nool debug blast-radius <path> --compact`. Those two checks are the difference between "we both edited different files" and "we both changed the same system meaning."
Concurrent agents need a shared operational ledger, not just politeness. Nool gives Codex, Claude, Cursor, and humans a place to coordinate intent before changes collide.
The failure pattern to avoid is simultaneous optimism. Each agent thinks its local task is safe because its diff is reasonable. The repository only sees the combined effect later. A Nool-backed workflow forces early disclosure: task claim, intent announcement, conflict discovery, blast-radius check, proposal. That sequence gives concurrency a memory, not just a calendar slot.
If a team cannot explain which agent owns which intent, it is not running a multi-agent workflow. It is running parallel chat sessions against the same filesystem.
That distinction shows up fast in reviews.
Good coordination is visible before code changes.
Always.