ADR-D9: OBSOLETE: lab as runtime dependency

Status:

Obsolete

Date:

2026-05-05

Supersedes:

earlier plan revision (revision 1)

Superseded-by:

D1 (Structure C)

Context

An earlier revision of the plan considered shipping the protea-reranker-lab repository as a runtime dependency of protea-core so that LightGBM training could execute inside the PROTEA worker pool.

Decision

Obsolete. Plan revision 3 adopts Structure C: the lab merges into protea-runners.lightgbm as a plugin discovered via entry_points. There is no runtime coupling.

Consequences

• protea-runners.lightgbm is the canonical home for LightGBM training.

• The dataset-publishing contract (Dataset row + artifact store URI) remains the only interface between platform and trainer.

Resolution

Declared obsolete on 2026-05-05.