Completes design and implementation of vault/project graph skill split:
memory-vault (renamed from memory-query, no god-node injection),
memory-project (new, covers full project-graph lifecycle), routing rule
in ~/.claude/CLAUDE.md, and trimmed session-context.sh (project graph
pointer only). All three AI assistant directories (.claude/, .codex/,
.pi/) remain content-identical after mirroring. Spec locked and moved to
openspec/specs/project-graph-lifecycle/.
jared