> ## Documentation Index
> Fetch the complete documentation index at: https://docs.quanux.org/symphony/llms.txt
> Use this file to discover all available pages before exploring further.

# Maestro: Symphony Vector-Engine Presence Authority

> Maestro records authenticated vector-engine docking relationships per TOPS and receptor, deriving a complete read-only inventory without starting or supervising engines.

Maestro (`modules/maestro`) is an independently installable, freezing-path C++26 presence authority. It records exact authenticated vector-engine docking relationships per TOPS and receptor and derives a complete read-only inventory of what is currently docked. Maestro is a witness, not a supervisor.

## What Maestro records

* Exact authenticated docking relationships between vector engines and receptors
* Per-TOPS scoping so each installation's presence stays private to that installation
* A derived, complete, read-only inventory available through `qxctl maestro inventory`

## What Maestro does not do

<Warning>
  Maestro does not start, schedule, supervise, or invoke engines. Binding, reconciliation, authenticated-session coordination, or a lifecycle plan alone does not establish Maestro presence, ratify semantic truth, mutate canonical knowledge, or prove installed-host completeness.
</Warning>

* Maestro creates no processes.
* Maestro never applies canonical knowledge changes.
* Maestro never replaces the vector engine that owns the semantics.

## Related surfaces

<CardGroup cols={2}>
  <Card title="qxctl maestro" icon="terminal" href="/symphony/symphony/qxctl/maestro">
    `qxctl maestro inventory` presents the derived inventory.
  </Card>

  <Card title="Session coordinator" icon="gears" href="/symphony/symphony/engines/coordinator">
    Owns authenticated-session and worktree-reconciliation mechanics.
  </Card>

  <Card title="SSIAG" icon="shield-halved" href="/symphony/symphony/governance/ssiag">
    Authenticates the docking relationships Maestro records.
  </Card>

  <Card title="Engines overview" icon="cube" href="/symphony/symphony/engines/overview">
    Independently installable vector engines that dock with Maestro.
  </Card>
</CardGroup>


## Related topics

- [qxctl maestro: Read Symphony Receptor Presence Inventory](/symphony/symphony/qxctl/maestro.md)
- [qxctl knowledge engines: Bind, Doctor, Migrate Registry](/symphony/symphony/qxctl/engines.md)
- [Symphony Vector Engines: Independent Installation Overview](/symphony/symphony/engines/overview.md)
- [qxctl: Symphony Agentic Administrative Command Line](/symphony/symphony/qxctl/overview.md)
- [Caller-Class Neutrality and Host Authority in Symphony](/symphony/symphony/concepts/caller-authority.md)