Graphify eliminates the need for the Ruby/SQLite tag index (Step 2 on
the critical path). It provides entity extraction and relationship
inference over vault docs via a local SLM, and deterministic code
graphs for projects via AST — both at significantly lower complexity.
This commit records the architecture decision and evaluation that
justifies the pivot.
Vault graphs still require author-maintained summaries (human router
hint), but tagging discipline is now optional. Project code graphs are
free (no LLM cost). Stale-node drift requires periodic `--force`
rebuilds; strategy documented for SessionStart hooks.
The three-layer memory system remains unchanged: episodic (memsearch),
knowledge (Graphify + vault), integration (custom glue). See
06-graphify-evaluation.md for the open questions and limitations.
jared