Captures the design for the new openclaw plugin hook PaddedCell needs
to implement its half of Plexum decision #37 (per-session tools-cache
filter). Documents the gap in current openclaw plugin SDK surface,
the proposed hook signature, the use case for dynamic-cache-tools
family of 4 host tools, and three open questions for upstream
maintainers (naming, multi-subscriber order, model-info access).
Plexum's implementation is the reference shape; the openclaw side
ships once the hook lands upstream.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
