For months I had the same problem with coding agents: the session drops a pile of changes, and by review time I no longer know what it touched or why.

The agent writes, the agent validates, the agent congratulates itself. The human signs blind.

And when the agent did write tests, it got worse — green tests that proved nothing. Mocks of the very code under test, assertions on private fields, snapshots of incidental structure.

Suite green, confidence zero.

So I built agents-concerto: a multi-agent orchestrator on top of Claude Code. The name is literal: there's a conductor and there are players. The conductor never touches an instrument. And the merge still belongs to the human.