# Phase 113: Runtime And CLI Layer Graph Surface - Context

**Gathered:** 2026-04-11
**Status:** Implemented and verified
**Mode:** Main production phase for `v1.60`

<domain>
## Phase Boundary

Materialize the flexible layer-graph surface through extracted helpers, service
write-through, and a CLI entrypoint.

</domain>

<decisions>
## Implementation Decisions

### Locked decisions

- keep layer-graph semantics out of `aitp_service.py` as much as possible
- write a dedicated topic-scoped artifact instead of hiding the graph only
  inside transient status payloads
- keep the service file under its maintainability watch limit by extracting
  runtime-surface logic into support modules

</decisions>

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*Phase: 113-runtime-and-cli-layer-graph-surface*
*Context captured on 2026-04-11 after Phase 113 implementation and verification*
