Lock two design decisions: (1) six independent namespaced tag facets
(type/client/project/domain/tool/convention/) plus scope/, with
hierarchy expressed via hub notes and Graphify edges, not nested paths;
(2) adopt the existing ~/Documents/SecondBrain vault as the knowledge
layer rather than creating a new one — it is already flat, governs to
the correct semantics, and contains useful patterns (proactive-query
spec, tag-inference table).
See ADR-011 and ADR-012 for rationale, rejected alternatives, and
migration cost (mechanical schema updates on existing ~20 notes).
The handoff document was a session artifact; it is no longer needed.
Update all architecture docs to reflect the design pivot: Graphify
knowledge graph supersedes the earlier Ruby/SQLite tag-index CLI and
the deferred QMD semantic layer. The vault metadata (summary + tags)
is retained; only the bespoke index is removed. Update ADRs 003, 005,
and 006 to note they are superseded by ADR-010 (Graphify), and update
all system-design doc references from the three-layer model to the
final two-layer model (episodic + knowledge).
This documents the complete architecture for a personal, cross-project
memory system for Claude Code: three-layer (episodic/knowledge/deferred-
semantic) design using Milvus Lite for fast local storage with lazy
remote sync. Includes video synthesis, architecture decisions with
rejected alternatives (MemPalace, Mem0, Postgres, LightRAG), concrete
build plan with scripts and hooks, and initial handoff for implementation.
jared