docs: standardize RA-OS naming and add process docs

ralph/prd.json

@@ -1,5 +1,5 @@
 {
-  "project": "rah-light",
+  "project": "rah-os",
   "context": "Stripping ra-h_os to a lightweight 2-panel knowledge graph UI with MCP server. Remove chat agents, voice, delegation system, memory pipeline. Keep: nodes/edges/dimensions CRUD, MCP server, workflows, extraction tools. The goal is a simple UI that technical users can run and connect their own agents to via MCP. Auth/subscription already removed from ra-h_os.",
   "userStories": [
     {
@@ -188,7 +188,7 @@
         "No references to removed features"
       ],
       "passes": true,
-      "notes": "Renamed to RA-H Light. Added 'What is RA-H Light?' section explaining it's for AI agent knowledge management. Added MCP integration section with Claude Code setup example and all 11 tools listed. Removed all references to chat agents, voice, 3-panel interface, content extraction."
+      "notes": "Renamed to RA-OS. Added 'What is RA-OS?' section explaining it's for AI agent knowledge management. Added MCP integration section with Claude Code setup example and all 11 tools listed. Removed all references to chat agents, voice, 3-panel interface, content extraction."
     },
     {
       "id": "15",

ralph/progress.txt

@@ -1,4 +1,4 @@
-# Ralph Progress Log - RA-H Light Strip-Down
+# Ralph Progress Log - RA-OS Strip-Down
 Started: Thu 29 Jan 2026 15:00:36 AEDT
 Branch: feature/rah-light
 Goal: Strip ra-h_os to lightweight 2-panel UI + MCP server
@@ -228,8 +228,8 @@ Goal: Strip ra-h_os to lightweight 2-panel UI + MCP server
 - Files modified:
   - README.md (complete rewrite)
 - Changes:
-  - Renamed from "RA-H Open Source" to "RA-H Light"
-  - Added "What is RA-H Light?" section explaining the stripped-down purpose
+- Renamed from "RA-H Open Source" to "RA-OS"
+- Added "What is RA-OS?" section explaining the stripped-down purpose
   - Explicitly list what's removed: chat agents, voice, delegation
   - Added comprehensive MCP integration section:
     - Claude Code setup with JSON config example
@@ -240,7 +240,7 @@ Goal: Strip ra-h_os to lightweight 2-panel UI + MCP server
   - Kept: quick start, platform support, commands, docs links, Linux/Windows setup
 - Learnings:
   - The README is the primary entry point - important to set expectations clearly
-  - MCP integration is now the main selling point of RA-H Light
+- MCP integration is now the main selling point of RA-OS
   - Users need clear setup instructions for Claude Code integration
 
 ## Story 15: Final verification
@@ -250,7 +250,7 @@ Goal: Strip ra-h_os to lightweight 2-panel UI + MCP server
   - npm run type-check: SUCCESS (no errors)
   - npm run dev: SUCCESS (starts on localhost:3000)
   - UI loads: SUCCESS (HTML renders with LeftToolbar, nodes panel visible)
-- Summary of RA-H Light:
+- Summary of RA-OS:
   - Total files deleted: ~50+ files across chat, voice, delegation systems
   - Total lines removed: ~5000+ lines of code
   - Remaining functionality: nodes/edges/dimensions CRUD, workflows, MCP server (11 tools)
@@ -261,7 +261,7 @@ Goal: Strip ra-h_os to lightweight 2-panel UI + MCP server
 
 # SPRINT COMPLETE
 
-All 15 stories passed. RA-H Light is now a minimal knowledge graph UI with MCP server:
+All 15 stories passed. RA-OS is now a minimal knowledge graph UI with MCP server:
 
 - **Removed:** Chat agents, voice features, delegation system, Anthropic integration
 - **Kept:** Node/Edge/Dimension CRUD, workflows, MCP server, embeddings, search

ralph/prompt.md

@@ -1,6 +1,6 @@
-# Ralph Autonomous Agent - RA-H Light Strip-Down
+# Ralph Autonomous Agent - RA-OS Strip-Down
 
-You are an autonomous coding agent stripping down ra-h_os to create RA-H Light — a minimal knowledge graph UI with MCP server.
+You are an autonomous coding agent stripping down ra-h_os to create RA-OS — a minimal knowledge graph UI with MCP server.
 
 ## Your Task