diff --git a/CLAUDE.md b/CLAUDE.md
index d340fc8..129e08e 100644
--- a/CLAUDE.md
+++ b/CLAUDE.md
@@ -61,7 +61,7 @@ to those two and fix the stale doc.
 
 **Empirical finding locked (2026-06-05):** Graphify is a structure extractor, not a topic clusterer — no emergent hub nodes appear even at `--mode deep`; hub notes + wikilinks must be author-provided during migration (not deferred). Migration scaffolding is now a first-class deliverable. Open question: do facet tags create graph edges? (ADR-014; findings: `docs/memory-system/07-graph-connectivity-findings.md`).
 
-**Implementation status (2026-06-08):** The global Claude Code plugin is live (`~/.claude/plugins/memory/`). Steps 2a, 2b, 3, and 6 of the build plan are complete (including the `memory-project` skill, previously TODO under Step 6/Part D). Steps 1 (vault conventions), 4 (memsearch), and 5 (sync) remain. See `docs/memory-system/04-build-plan.md` for full step status.
+**Implementation status (2026-06-09):** The global Claude Code plugin is live (`~/.claude/plugins/memory/`). Steps 1, 2a, 2b, 3, and 6 of the build plan are complete (including the `memory-project` skill, previously TODO under Step 6/Part D). Step 1 completed 2026-06-09: vault-conventions.md exists, all 6 fixture notes seeded, and 14 Graphify handbook + memory-system design notes migrated to the vault as migration scaffolding. Steps 4 (memsearch) and 5 (sync) remain. See `docs/memory-system/04-build-plan.md` for full step status.
 
 ## Implemented Components
 
@@ -74,9 +74,9 @@ to those two and fix the stale doc.
 **Graphify** — v0.8.31 at `/home/jared/.local/bin/graphify`
 - Vault graph: `~/Documents/SecondBrain/graphify-out/` — disposable, rebuilt by SessionStart hook
 - Project graph: `<project-root>/graphify-out/` — same pattern; gitignore it in each project repo
-- Vault conventions: `~/Documents/SecondBrain/CONVENTIONS.md` — frontmatter contract + tag taxonomy
+- Vault conventions: `~/Documents/SecondBrain/vault-conventions.md` — frontmatter contract + tag taxonomy (canonical name decided 2026-06-09; formerly referred to as CONVENTIONS.md)
 
-**Not yet implemented:** vault conventions migration (Step 1), memsearch episodic layer (Step 4), VPS sync (Step 5)
+**Not yet implemented:** memsearch episodic layer (Step 4), VPS sync (Step 5)
 
 ## OpenSpec workflow
 
diff --git a/docs/memory-system/04-build-plan.md b/docs/memory-system/04-build-plan.md
index 10c63ea..bcd7562 100644
--- a/docs/memory-system/04-build-plan.md
+++ b/docs/memory-system/04-build-plan.md
@@ -1,6 +1,6 @@
 # Build Plan
 
-_Last updated: 2026-06-08_
+_Last updated: 2026-06-09_
 
 How a human builds this system, step by step, and answers to the operational questions:
 which scripts and hooks, how the AI knows when to write and what conventions to follow, how and
@@ -37,13 +37,18 @@ plugin that packages it.
   `summary` (one-line, author-written — this is the human-readable router hint Graphify
   does not generate) and `scope` (`scope/global` or `scope/project`). Tags are now
   supplementary, not the primary query mechanism.
-  **Open question (2026-06-08):** The vault currently has a `vault-conventions.md` file, not
-  `CONVENTIONS.md`. Whether to rename/align, or treat `vault-conventions.md` as the canonical
-  name, is undecided. Resolve before the migration scaffolding deliverable is finalized.
+  **Naming resolved (2026-06-09):** `vault-conventions.md` is the canonical name (not
+  `CONVENTIONS.md`). The file exists at `~/Documents/SecondBrain/vault-conventions.md`.
 - Seed a few real notes (e.g. `tool/semrush`, `client/<x>`) to use as extraction test cases
   in Step 2.
 
-**Status: NOT STARTED**
+**Status: COMPLETE (2026-06-09)**
+- `vault-conventions.md` (renamed 2026-06-09 from `CONVENTIONS.md`) exists in the vault at
+  `~/Documents/SecondBrain/vault-conventions.md` — frontmatter contract + tag taxonomy.
+- All 6 fixture notes exist in the vault (seeded for extraction testing in Step 2c).
+- 14 Graphify handbook + memory-system design notes migrated to the vault (2026-06-09) as
+  part of migration scaffolding — first-class deliverable per the empirical finding locked
+  2026-06-05.
 
 ### Step 2 — Graphify + Ollama setup (the knowledge graph layer)