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

knowledge/obsidian-usage.md

@@ -0,0 +1,84 @@
+---
+type: guide
+audience: workspace-user
+tags:
+  - onboarding
+  - obsidian
+---
+
+# Obsidian Usage Guide
+
+Use Obsidian to navigate and review workspace memory. Do not use it as a separate memory database.
+
+---
+
+## Recommended Start
+
+Open:
+
+- [Obsidian Vault Map](obsidian-vault.md)
+- [New Member Onboarding](onboarding.md)
+- [Knowledge Maps](maps/index.md)
+
+---
+
+## Best Views
+
+### New Member View
+
+Start with:
+
+- [New Member Onboarding](onboarding.md)
+- [Glossary](glossary.md)
+- [Current Work Map](maps/current-work.md)
+- [Fidelity Domain Map](maps/fidelity-domain.md)
+
+### Daily Work View
+
+Start with:
+
+- [Current Work Map](maps/current-work.md)
+- [Work Items Map](maps/work-items.md)
+- [Logs Index](../ai/logs/index.md)
+
+### System Understanding View
+
+Start with:
+
+- [Fidelity Domain Map](maps/fidelity-domain.md)
+- [AI Workspace Core Map](maps/ai-workspace-core.md)
+- [Tooling Map](maps/tooling.md)
+
+---
+
+## Graph Guidance
+
+Use the graph to find clusters, not to infer truth.
+
+High-value graph hubs:
+
+- `obsidian-vault`
+- `onboarding`
+- `current-work`
+- `fidelity-domain`
+- `work-items`
+- `people`
+- `tooling`
+- `ai-workspace-core`
+
+If a node is isolated, it may still be valid. It may be:
+
+- a daily log
+- raw evidence
+- a command/prompt file
+- a file that needs to be linked from a map
+
+---
+
+## Editing Rules
+
+- Edit canonical memory files when the fact is clear.
+- Prefer updating existing notes over adding duplicate summaries.
+- Do not edit generated files as durable memory.
+- Do not treat inbox files as confirmed truth.
+- Use maps to improve navigation, not to store detailed facts.