* docs(3660): add Runtime Artifact Layout Module ADR + CONTEXT.md entry
Records the architectural decision to add a Runtime Artifact Layout Module
that owns per-runtime artifact placement (commands / agents / skills) as a
typed seam. Closes the bug class behind #3659 where the Runtime Surface
Module forgets artifact kinds the install/uninstall pipelines track.
CONTEXT.md gains the new module entry directly after the Skill Surface
Budget Module since the two seams compose.
Pure docs — no code changes. Phase 1 implementation lands in a separate PR.
Closes#3660
Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
* docs(3660): fix ADR parity and clarify phase boundaries
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Co-authored-by: Claude Opus 4.7 <noreply@anthropic.com>
