feat: Add Obsidian vault configuration and documentation for navigation and memory management

core/profiles/create-project-profile.md

@@ -86,3 +86,16 @@ Before using the workspace for real work:
 - generate one standup from sample context
 - verify that imported evidence and promoted memory stay separate
 
+---
+
+## 6. Optional Obsidian Vault
+
+Open the workspace root as an Obsidian vault when you want a visual/manual navigation layer.
+
+Recommended rules:
+
+- keep the workspace filesystem as the single source of truth
+- do not copy memory into a separate Obsidian-only folder
+- version only portable `.obsidian` configuration
+- ignore local Obsidian workspace state and plugin runtime files
+- create or update a vault map under `knowledge/` for human navigation