docs-frontmatter-cleanup: the 11 invalid last_updated frontmatter scalars quoted — double-quote convention applied uniformly (one escaped quote in phase-0.md), annotation prose verbatim; PyYAML sweep over docs/**/*.md + tasks/*.md reports 0 failures, taskgraph validate green (79 tasks); task status -> completed with Notes (recorded sweep command, date-scalar caveat) + Summary

docs/research/consumer-inventory.md

@@ -1,11 +1,11 @@
 ---
 status: draft
-last_updated: 2026-10-10 (mem-engine engine-tier row added —
+last_updated: "2026-10-10 (mem-engine engine-tier row added —
 operator-authority record: wasm32 sandboxing + downstream
 ffi/napi/python-adapter economics; the record the ADR-024 scope
 decision cites per the row-first gate. Earlier: 2026-10-05 streams
 correction and alkcall row; rate-limits + result-storage remain the
-keep-with-flag rows.)
+keep-with-flag rows.)"
 ---
 
 # alkstore — consumer-driven scope inventory