MCP (Model Context Protocol) support:
- Add MCPRef type for agent MCP server references
- Parse MCP command in Agentfiles (MCP name command [args...])
- Load and manage MCP servers with mcpManager
- Implement agentic loop for multi-turn tool execution
- Add /mcp REPL commands (add, remove, disable, enable)
- Add 'ollama mcp' CLI commands for global config management
- Support both model-bundled and global (~/.ollama/mcp.json) MCPs
- Display MCPs in 'ollama show' output
ENTRYPOINT support:
- Add ENTRYPOINT command to Agentfiles for custom runtimes
- Allow agents without FROM when ENTRYPOINT is specified
- Execute entrypoint as subprocess with stdin/stdout connected
- Support $PROMPT placeholder for prompt insertion control
- Hide Model section in 'ollama show' for entrypoint-only agents
- Pass user prompt as argument to entrypoint command