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Agent Harness vs Agent Framework vs MCP: Which Layer Owns the Loop, State, Tools, Permissions, and Recovery

marktechpost.com · published 14 September 2026

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https://developers.openai.com/blog/codex-as-a-platform
developers.openai.com
https://code.claude.com/docs/en/glossary
code.claude.com
https://code.claude.com/docs/en/agent-sdk/overview
code.claude.com
https://docs.langchain.com/oss/python/langgraph/durable-execution
docs.langchain.com
https://openai.github.io/openai-agents-python/running_agents/
openai.github.io
https://devblogs.microsoft.com/agent-framework/microsoft-agent-framework-version-1-0/
devblogs.microsoft.com
https://modelcontextprotocol.io/specification/2026-07-28
modelcontextprotocol.io
https://www.linuxfoundation.org/press/linux-foundation-announces-the-formation-of-the-agentic-ai-foundation
linuxfoundation.org
https://code.claude.com/docs/en/agent-sdk/agent-loop
code.claude.com
https://developers.openai.com/codex/app-server
developers.openai.com
The 2026-07-28 Specification Read at the source ↗
blog.modelcontextprotocol.io
https://code.claude.com/docs/en/agent-sdk/sessions
code.claude.com
https://code.claude.com/docs/en/agent-sdk/file-checkpointing
code.claude.com
https://devblogs.microsoft.com/agent-framework/microsoft-agent-framework-at-build-2026-announce/
devblogs.microsoft.com
https://www.anthropic.com/engineering/effective-harnesses-for-long-running-agents
anthropic.com
https://openai.github.io/openai-agents-python/sessions/
openai.github.io
https://code.claude.com/docs/en/agent-sdk/mcp
code.claude.com
https://developers.openai.com/codex/extend/mcp
developers.openai.com
https://code.claude.com/docs/en/permission-modes
code.claude.com
https://code.claude.com/docs/en/agent-sdk/hooks
code.claude.com
Building guardrails for agents Read at the source ↗
openai.github.io
https://docs.langchain.com/oss/python/langgraph/interrupts
docs.langchain.com
https://claude.com/blog/a-harness-for-every-task-dynamic-workflows-in-claude-code
claude.com
https://www.anthropic.com/engineering/harness-design-long-running-apps
anthropic.com
Harness engineering: leveraging Codex in an agent-first world Read at the source ↗
openai.com
https://github.com/deepseek-ai/deepseek-harness
github.com
https://www.linuxfoundation.org/press/agentic-ai-foundation-launches-mcpa-certification-to-validate-mcp-expertise
linuxfoundation.org
The New MCP Roadmap Read at the source ↗
blog.modelcontextprotocol.io
https://developers.openai.com/codex/codex-sdk
developers.openai.com
Code execution with MCP: Building more efficient agents Read at the source ↗
anthropic.com