OpenAgentFlow Support (openagentflow-support)

Official Visual Studio Code language support for OpenAgentFlow (.oaf) — the portable, runtime-independent specification for AI agent workflows.

✨ Features

• Full Syntax Highlighting (source.oaf): Accurate semantic and lexical highlighting for .oaf and .openagentflow files according to the official OpenAgentFlow language specification.
• Keyword & Block Recognition: Highlighting for top-level workflow blocks (workflow, agent, state, flow, config).
• Type Expressions: Support for primitive (string, int, float, bool) and generic (list, map) types.
• State Options & Decorators: Distinct highlighting for variable decorators such as @required, @default, @description / @desc, @secret, @persist, @reducer, @min, @max, and @pattern.
• Agent & Config Properties: Dedicated colorization for property keys (instructions, model, provider, temperature, tools, inputs, outputs, max_iterations, timeout_seconds, runtime, version).
• Multi-Line Triple-Quoted Strings: Highlighting and auto-closing for """ ... """ strings and " ... " strings with escape sequence recognition (\n, \t, \", \\, etc.).
• Flow Operators & Constants: Colorization for flow graph edges (->) and reserved nodes (start, end).
• Smart Editor Configuration: Auto-closing brackets ({}, [], ()), line comments (//), and smart indentation rules when opening/closing blocks.

📝 Example Code (.oaf)

// Summarize workflow: analyze text then produce a summary
workflow "Summarize" {

    config {
        version: "0.1"
        runtime: "langgraph"
        timeout_seconds: 60
    }

    state {
        request: string
        source_text: string @required @description("Original text to summarize")
        key_points: list[string]
        summary: string
    }

    agent Analyst {
        instructions: """
        Analyze the request and source text.
        Identify the most important facts, themes, and action items.
        Produce concise key_points only.
        """
        model: "gemma-4-26b-a4b-it"
        temperature: 0.2
        inputs: [request, source_text]
        outputs: [key_points]
    }

    agent Writer {
        instructions: """
        Use the key_points to write a clear, concise summary.
        Preserve meaning, remove redundancy, and match the requested tone.
        """
        model: "gemma-4-26b-a4b-it"
        temperature: 0.7
        inputs: [key_points]
        outputs: [summary]
    }

    flow {
        start -> Analyst
        Analyst -> Writer
        Writer -> end
    }

}

⚙️ Installation & Usage

1. Open Visual Studio Code.
2. Go to the Extensions tab (Ctrl+Shift+X or Cmd+Shift+X).
3. Search for OpenAgentFlow Support or install directly from .vsix.
4. Any file with .oaf or .openagentflow extension will automatically activate the syntax highlighting and language configuration.

📄 License

MIT License