Show HN: Blacknode – Visual workflow builder Claude can drive via MCP (github.com)

Blacknode has introduced a robust visual workflow builder that allows AI agents to efficiently create, validate, run, and debug workflows using the Claude Desktop or any compatible MCP client. By connecting with Blacknode, users can bypass the complexities of JSON and fragile graph prompts, utilizing a live editor to dynamically assemble node graphs. Workflows can be exported as coherent Python code, making them easier to inspect and version. Currently in public preview, this tool supports typed ports—color-coded for compatibility—and provides a live editor to observe workflow construction in real-time. This development is significant for the AI and machine learning community as it simplifies the process of creating complex AI workflows, enabling better interactivity and understanding of the workflow mechanics. Blacknode's integration with various AI model providers such as OpenAI and NVIDIA NIM, coupled with its local API-key management and extensive error validation features, enhances accessibility for developers. The implementation of a "Run Replay" feature, allowing users to scrub through execution logs with visual highlights, further aids in debugging and optimizing workflows. As Blacknode aims to bridge the gap between visual representation and code, it may transform how developers interact with workflow automation in AI applications.