docs: update documentation after MCP server removal

- Remove MCP server section from CLAUDE.md code architecture
- Remove `make mcp-inspector` command reference from CLAUDE.md
- Update Python requirements note in README.md to reflect 3.9+ support

Author: ryoppippi

CLAUDE.md

@@ -33,9 +33,6 @@ make test-examples    # Run example tests
 # Documentation
 make docs-serve       # Build and serve docs locally (http://localhost:8000)
 make docs-build       # Build docs for deployment
-
-# MCP Development
-make mcp-inspector    # Run MCP server inspector for debugging
 ```
 
 ## Code Architecture
@@ -57,10 +54,6 @@ make mcp-inspector    # Run MCP server inspector for debugging
    - Handles file upload detection (`format: binary` → `type: file`)
    - Resolves schema references
 
-4. **MCP Server** (`stackone_ai/server.py`): Protocol implementation
-   - Async tool execution
-   - CLI interface via `stackmcp` command
-
 ### OpenAPI Specifications
 
 All tool definitions are generated from OpenAPI specs in `stackone_ai/oas/`:

README.md

@@ -24,7 +24,7 @@ StackOne AI provides a unified interface for accessing various SaaS tools throug
 
 ## Requirements
 
-- Python 3.10+ (MCP extra required for `fetch_tools()`)
+- Python 3.9+ (Python 3.10+ required for MCP-backed `fetch_tools()`)
 
 ## Installation