# Phase 103: Phase6 Structural Test Split - Context

**Gathered:** 2026-04-11
**Status:** Implemented and verified
**Mode:** First implementation phase for `v1.57`

<domain>
## Phase Boundary

Open `v1.57` by moving phase6 schema and validator checks into a dedicated
structural test file.

</domain>

<decisions>
## Implementation Decisions

### Locked decisions

- keep the moved structural checks close to the original phase6 area rather than
  creating a generic catch-all structural file
- reuse the shared temp-kernel helper from `v1.56`

</decisions>

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*Phase: 103-phase6-structural-test-split*
*Context captured on 2026-04-11 after Phase 103 implementation and verification*
