feat: MCP server v1.2.0 — guide system + read/write guide tools

Adds full guide system to MCP standalone server. System guides (schema,
creating-nodes, edges, dimensions, extract) are bundled and immutable.
Users can create up to 10 custom guides via rah_write_guide. Syncs guide
infrastructure from main repo to OS repo app code.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

apps/mcp-server-standalone/guides/system/dimensions.md

@@ -0,0 +1,38 @@
+---
+name: Dimensions
+description: Create, lock, describe, organize, clean up dimensions.
+immutable: true
+---
+
+# Dimensions
+
+Dimensions are how nodes are categorized and organized. Think of them as flexible tags with descriptions.
+
+## Operations
+
+- **Create:** `createDimension(name, description, isPriority)`
+- **Update:** `updateDimension(name, { newName, description, isPriority })`
+- **Delete:** `deleteDimension(name)` — removes from all nodes
+- **Query:** Use sqliteQuery to list dimensions and their node counts
+
+## Locking (Priority)
+
+- `isPriority = true` (locked) → dimension auto-assigns to new nodes when relevant
+- `isPriority = false` (unlocked) → manual assignment only
+- Lock dimensions that represent active areas of focus
+
+## Naming Conventions
+
+- Lowercase, concise (e.g., "ai", "philosophy", "ra-h")
+- Use singular form where natural
+- Avoid overlapping names (don't have both "ai" and "artificial-intelligence")
+
+## Description
+
+Every dimension should have a description explaining its purpose. This helps the AI correctly assign nodes to dimensions.
+
+## Cleanup
+
+- Delete dimensions with 0 nodes
+- Merge overlapping dimensions (update nodes, then delete the redundant one)
+- Regularly review dimension list for coherence