# Declared contract migration route

Build-time release reference. Runtime readiness, deployment, payment settlement and external indexing are not evaluated here. Prices are proposed; this file cannot authorize execution or payment.

Choose a bounded minimum-cost route through a supplied directed version-migration manifest, respecting explicit lossy-step, cost and step limits. Version IDs are opaque; no migrations run and declared compatibility is not independently verified.

Release: 0.29.0. Built: 2026-10-06T15:38:00Z.

## Choose for
- Plan a declared contract migration path between agent versions
- Find a lowest-cost adapter chain without allowing declared data loss

## Outside this profile
- Live negotiation, message delivery, queue consumption, remote pagination, artifact fetching or migration execution
- Authentication, signed provenance, authorization, schema compatibility proofs, or exactly-once guarantees
- Inferring absent versions, server state, missing history, semantic equivalence, or market uniqueness

Proposed nominal USD 0.005 per successful call; payer fees excluded. No verified runtime availability.

- [Exact release contract](/reference/services/contract-version-route.json)
- [Input schema](/reference/schemas/contract-version-route.input.json)
- [Output schema](/reference/schemas/contract-version-route.output.json)
- [Fixed example](/reference/examples/contract-version-route.json)
- [Complete HTML reference](/discover/tools/contract-version-route)