Declarative language for repeatable AI workflows (MIT)
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Pipelex

Declarative language for repeatable AI workflows (MIT)

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Pipelex is a declarative language (MIT) and Python runtime for repeatable, agent-first AI workflows. Think Dockerfile/SQL for LLM pipelines: you describe steps & interfaces; any model/provider can execute them. Open standard with MCP, FastAPI, VS Code, n8n.
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Comments, support and feedback

  • Robin Honnart
    4 months ago

    If you want to use Pipelex IRL, we're hosting a Hackathon in San Francisco on Wed 10/29 Register to attend : https://luma.com/4jwfaw71

  • Robin Honnart
    4 months ago

    Hey DevHunt! We built Pipelex because we kept rewriting the same agentic patterns across projects. Instead of more glue code, we modeled *meaningful* steps that both humans and LLMs can read and execute like Dockerfile/SQL for AI workflows. What’s included - Python library for local dev - FastAPI server + Docker image (self-host) - MCP server (agents can *run* and even *build* pipes) - n8n node for automations - VS Code / Cursor extension (PLX syntax) What we’d love feedback on 1. Does the PLX syntax help you model your use case? 2. Agent/MCP workflows & n8n node devX. 3. Missing pipe types / model integrations. 4. OSS contributions (core + community pipes). Known limitations - Connectors: we focus on cognitive steps; bring your own app/API (or MCP/n8n). - Visualization: flow-charts WIP. - Pipe builder can fail on very complex briefs; we’re adding recursion. - No hosted API yet (on the way). - Cost tracking: LLM only for now. - Caching & reasoning options: not yet. Thanks for trying even one workflow and telling us exactly where it hurts — that’s the most valuable feedback.

About this launch

Pipelex was launched by Robin Honnart in October 28th 2025.

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