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An indentation-based, type-safe domain-specific language (DSL) for programming stateful multi-agent workflows, LLM routing, and structured execution graphs.
Thanks everyone for checking out SWAN L4!
L4 is a human-readable scripting language for building AI agents and workflows without the complexity of traditional programming. The goal is to make agent orchestration simple, predictable, and easy to read, even as workflows grow more sophisticated.
Some highlights:
* 🦢 Clean, natural-language syntax
* 🤖 Built-in support for AI reasoning, tools, and agent-to-agent communication
* 🔁 Structured control flow (loops, conditionals, parallel execution, iteration)
* 🧠 Explicit context and variable handling for reliable workflows
* 🌍 Localized diagnostics and developer-friendly debugging
We're excited to hear your thoughts:
* What kinds of AI agents would you build with a language like this?
* Which features would make AI workflow development easier for you?
We'll be here all day to answer questions, collect feedback, and discuss ideas. Thanks for your support! 🚀
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About L4: AI Agent Programming Language on Product Hunt
“Program your AI Agents with Pure Declaration”
L4: AI Agent Programming Language was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #18 on the daily leaderboard. An indentation-based, type-safe domain-specific language (DSL) for programming stateful multi-agent workflows, LLM routing, and structured execution graphs.
L4: AI Agent Programming Language was featured in GitHub (41.3k followers) on Product Hunt. Together, these topics include over 24.3k products, making this a competitive space to launch in.
Who hunted L4: AI Agent Programming Language?
L4: AI Agent Programming Language was hunted by Belisov. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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