chore: sync vault to ~/cosmic-brain (Obsidian-registered path)

CLAUDE.md

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+# cosmic-brain — Claude + Obsidian Wiki Vault
+
+This folder is both a Claude Code plugin and an Obsidian vault.
+
+**Plugin name:** `cosmic-brain`
+**Skills:** `/wiki`, `/wiki-ingest`, `/wiki-query`, `/wiki-lint`
+**Vault path:** This directory (open in Obsidian directly)
+
+## What This Vault Is For
+
+[Fill this in when you first scaffold the vault. One sentence describing your purpose.]
+
+## Vault Structure
+
+```
+.raw/           source documents — immutable, Claude reads but never modifies
+wiki/           Claude-generated knowledge base
+_templates/     Obsidian Templater templates
+_attachments/   images and PDFs referenced by wiki pages
+```
+
+## How to Use
+
+Drop a source file into `.raw/`, then tell Claude: "ingest [filename]".
+
+Ask any question. Claude reads the index first, then drills into relevant pages.
+
+Run `/wiki` to scaffold a new vault or check setup status.
+
+Run "lint the wiki" every 10-15 ingests to catch orphans and gaps.
+
+## Cross-Project Access
+
+To reference this wiki from another Claude Code project, add to that project's CLAUDE.md:
+
+```markdown
+## Wiki Knowledge Base
+Path: /path/to/this/vault
+
+When you need context not already in this project:
+1. Read wiki/hot.md first (recent context, ~500 words)
+2. If not enough, read wiki/index.md
+3. If you need domain specifics, read wiki/<domain>/_index.md
+4. Only then read individual wiki pages
+
+Do NOT read the wiki for general coding questions or things already in this project.
+```
+
+## Plugin Skills
+
+| Skill | Trigger |
+|-------|---------|
+| `/wiki` | Setup, scaffold, route to sub-skills |
+| `ingest [source]` | Single or batch source ingestion |
+| `query: [question]` | Answer from wiki content |
+| `lint the wiki` | Health check |
+
+## MCP (Optional)
+
+If you configured the MCP server, Claude can read and write vault notes directly.
+See `skills/wiki/references/mcp-setup.md` for setup instructions.