feat(frameworks): add Ontheia — self-hosted MCP-native agent platform (AGPL-3.0)

Verified: GitHub repo exists (Ontheia/ontheia, AGPL-3.0, created 2026-04-09), legitimate open-source project with MCP-native features, multi-provider support, GDPR-compliant by design.

Author: Ontheia

README.md

@@ -462,6 +462,7 @@ Entries may carry one or more status tags so readers can judge maturity at a gla
 - [OpenAI Agents SDK](https://github.com/openai/openai-agents-python) - 🆕 [Next evolution shipped April 15, 2026](https://openai.com/index/the-next-evolution-of-the-agents-sdk/) — native sandbox execution, MCP-native tool use, sub-agent handoffs, Codex-style filesystem ops. Production-ready multi-agent workflows. ![GitHub stars](https://img.shields.io/github/stars/openai/openai-agents-python?style=flat-square)
 - [MetaGPT](https://github.com/geekan/MetaGPT) - Multi-agent framework assigning different roles to GPTs for collaborative software entities. ![GitHub stars](https://img.shields.io/github/stars/geekan/MetaGPT?style=flat-square)
 - [Mastra](https://github.com/mastra-ai/mastra) - 🆕 TypeScript-first agent framework with workflow-driven development and built-in observability. ![GitHub stars](https://img.shields.io/github/stars/mastra-ai/mastra?style=flat-square)
+- [Ontheia](https://github.com/Ontheia/ontheia) - Self-hosted, open-source AI agent platform. Multi-provider (Claude, OpenAI, Gemini, Ollama), MCP-native, Chain Engine for visual workflow automation, long-term memory (pgvector), multi-user RBAC, GDPR-compliant by architecture. AGPL-3.0. ![GitHub stars](https://img.shields.io/github/stars/Ontheia/ontheia?style=flat-square)
 - [AgentGPT](https://github.com/reworkd/AgentGPT) - 📦 **Archived** (2025-04). Assemble, configure, and deploy autonomous AI agents in your browser. Influential first-wave project, kept for historical reference; no longer maintained. ![GitHub stars](https://img.shields.io/github/stars/reworkd/AgentGPT?style=flat-square)
 - [BabyAGI](https://github.com/yoheinakajima/babyagi) - AI-powered task management system using LLMs to create, prioritize, and execute tasks. ![GitHub stars](https://img.shields.io/github/stars/yoheinakajima/babyagi?style=flat-square)
 - [SuperAGI](https://github.com/TransformerOptimus/SuperAGI) - 💤 **Stale** (no commits since 2025-01). Open-source autonomous AI agent framework to build, manage & run agents. ![GitHub stars](https://img.shields.io/github/stars/TransformerOptimus/SuperAGI?style=flat-square)