chore: remove AI & RAG pipeline example from documentation

Author: hotlong

ARCHITECTURE.md

@@ -285,16 +285,6 @@ Located in `packages/plugins/*`:
 
 **Dependencies**: `@objectstack/spec`, `commander`, `chalk`, `tsx`, `zod`
 
-#### `@objectstack/ai-bridge`
-**Location**: `packages/ai-bridge/`  
-**Role**: AI Integration
-
-- AI agent bridge
-- LLM integrations
-- RAG pipeline
-
-**Dependencies**: `@objectstack/spec`, `zod`
-
 ---
 
 ## Layer Architecture
@@ -458,8 +448,6 @@ interface PluginCapabilityManifest {
     │       └── @objectstack/driver-memory
     │
     ├── @objectstack/cli (Standalone tool)
-    │
-    └── @objectstack/ai-bridge
 ```
 
 ### Dependency Rules

examples/basic/README.md

@@ -32,7 +32,7 @@ Each example file can be run independently with `tsx`:
 
 ```bash
 # Run a specific example
-npx tsx examples/basic/ai-rag-example.ts
+npx tsx examples/basic/stack-definition-example.ts
 
 # Or uncomment the demonstration function calls at the end of each file
 ```
@@ -87,24 +87,6 @@ Demonstrates the API Discovery protocol for runtime introspection:
 - Authentication configuration
 - Feature flags
 
-### AI & RAG Pipeline
-**File:** [`ai-rag-example.ts`](./ai-rag-example.ts)
-
-Shows Retrieval-Augmented Generation (RAG) pipeline configuration:
-- Document ingestion and chunking
-- Vector embeddings and storage
-- Semantic search and retrieval
-- Context assembly for LLMs
-- AI agent with RAG integration
-
-**Key Concepts:**
-- RAG pipeline configuration
-- Document processing
-- Vector database integration
-- Hybrid search (vector + keyword)
-- Reranking for better results
-- Context template formatting
-
 ### Auth & Permissions
 **File:** [`auth-permission-example.ts`](./auth-permission-example.ts)