This Obsidian vault is the persistent memory substrate ("second brain") for its operator. It is read and written across Claude / CoWork sessions through the Obsidian Local REST API.

This vault holds data, not logic. All operating procedure — how the vault is bootstrapped, how notes are routed, the taxonomy, frontmatter conventions, and safety rules — lives in the echo-memory plugin, which is the single source of truth. There are intentionally no CLAUDE.md / BOOTSTRAP.md / STRUCTURE.md control docs in this vault; updating or porting ECHO means updating or installing the plugin, not editing files here.

Layout: see the plugin's references/vault-layout.md.
Operating contract & safety: see the plugin's references/operating-contract.md.
Bootstrap / repair: see the plugin's references/bootstrap.md.
Version marker: _agent/echo-vault.md records the schema version and bootstrap date.

Folders: inbox/, journal/ (daily + weekly/monthly/quarterly/annual rollups), projects/, areas/, resources/, decisions/, and the agent subtree _agent/.