Router compatibility entry

router is a compatibility alias. Delegate to dispatcher, the single routing-policy owner.

Rules

• Do not maintain a second keyword table, genre matrix, engine selector or mode resolver here.
• Preserve explicit project engine/mode choices and pass the request through unchanged except for compatibility normalization required by the host integration.
• Do not load additional skills merely because this legacy entry was used.
• Dispatcher acceptance/evidence rules apply unchanged.

Acceptance

For the same project facts and request, entering through router yields the same USE / ENGINE / ASK / DEFER decision as entering through dispatcher. Any divergence is a compatibility bug, not a new routing policy.