The services and plugins through which a human collaborates with a running agent — questions, approvals, permission presets, commands. These are **product** packages: real interfaces a person drives.
These packages integrate through existing agent and session contracts rather than changing the loop. Interactive applications provide the concrete command, approval, and question adapters; automation uses [`acp/`](../acp/README.md), and runnable demo bundles live under [`examples/`](../examples/README.md). The product [`dsh`](../../apps/cli/README.md) CLI composes these packages directly.
The subsystem references: [approval.md](../../docs/subsystems/approval.md), [permission.md](../../docs/subsystems/permission.md), [user-interaction.md](../../docs/subsystems/user-interaction.md), and [commands.md](../../docs/subsystems/commands.md). The automation-only ACP transport is [`acp/`](../acp/README.md), the SDK's JSON-RPC server half is [`sdk/server`](../sdk/README.md), and the shared bin boot glue is [`boot/`](../boot/README.md).