### Added
- Public durable AbstractCore bloc lifecycle operations on `get_abstractcore_host_facade(...)` across local, remote, and hybrid runtimes:
  - `list_blocs(...)`
  - `list_bloc_kv_artifacts(...)`
  - `delete_bloc_kv_artifact(...)`
  - `prune_bloc_kv_artifacts(...)`
  - `delete_bloc(...)`

### Changed
- Minimum optional AbstractCore dependency floor is now `abstractcore>=2.13.23`.
- Runtime's public docs and AI-readable `llms.txt` / `llms-full.txt` now describe the shipped durable bloc prompt-cache lifecycle boundary, including per-model KV artifacts and explicit cleanup controls.
