busbar-sf-agentscript

AgentScript parser, graph analysis, and LSP for Salesforce Agentforce.

AgentScript (.agent) is Salesforce's indentation-sensitive language for defining AI agent behavior in Agentforce. This project provides tooling for authoring, validating, and analyzing .agent files.

Getting Started

Choose the option that fits your workflow:

SF CLI Plugin

Install with the Salesforce CLI:

sf plugins install sf-plugin-busbar-agency

Validate an AgentScript file:

sf agency validate --file my-agent.agent

Export the topic reference graph:

sf agency graph --file my-agent.agent --format graphml --output graph.xml

Extract action interface definitions:

sf agency actions --file my-agent.agent

The plugin exits non-zero on errors, making it suitable for CI pipelines.

VS Code Extension

Install from the VS Code Marketplace:

code --install-extension composable-delivery.vscode-agentscript

Or download the .vsix from GitHub Releases and install manually:

code --install-extension vscode-agentscript-<version>.vsix

Features:

• Syntax highlighting for .agent files
• Real-time diagnostics — undefined references, cycle detection, unreachable topics
• Hover documentation
• Semantic token highlighting
• Topic graph visualization (AgentScript: Show Topic Graph)
• Agent simulation (AgentScript: Simulate Agent)
• AgentScript Dependencies panel in the Explorer sidebar

Settings:

LSP Server

The busbar-sf-agentscript-lsp binary powers the VS Code extension and works with any LSP-capable editor.

Install

Download the pre-built binary for your platform from GitHub Releases:

Or install from source:

cargo install --git https://github.com/composable-delivery/busbar-sf-agentscript busbar-sf-agentscript-lsp

Neovim

Using nvim-lspconfig:

local lspconfig = require('lspconfig')
local configs = require('lspconfig.configs')

if not configs.agentscript then
  configs.agentscript = {
    default_config = {
      cmd = { 'busbar-sf-agentscript-lsp' },
      filetypes = { 'agentscript' },
      root_dir = lspconfig.util.root_pattern('sfdx-project.json', '.git'),
    },
  }
end

lspconfig.agentscript.setup {}

Add to ~/.config/nvim/init.lua (or your config's ftdetect):

vim.filetype.add({ extension = { agent = 'agentscript' } })

Helix

Add to ~/.config/helix/languages.toml:

[[language]]
name = "agentscript"
scope = "source.agentscript"
file-types = ["agent"]
roots = ["sfdx-project.json", ".git"]
language-servers = ["agentscript-lsp"]

[language-server.agentscript-lsp]
command = "busbar-sf-agentscript-lsp"

Other Editors

Any editor supporting LSP can be configured to launch busbar-sf-agentscript-lsp as a stdio language server for files with the .agent extension.

Rust Crates

Add to Cargo.toml:

[dependencies]
# Parser only (default)
busbar-sf-agentscript = "0.1"

# Parser + graph analysis
busbar-sf-agentscript = { version = "0.1", features = ["graph"] }

# Parser + WASM bindings
busbar-sf-agentscript = { version = "0.1", features = ["wasm"] }

Parser

use busbar_sf_agentscript::parse;

let source = std::fs::read_to_string("my-agent.agent").unwrap();
let ast = parse(&source).unwrap();
println!("{} topics defined", ast.topics.len());

Graph Analysis

use busbar_sf_agentscript::{parse, graph::RefGraph};

let source = std::fs::read_to_string("my-agent.agent").unwrap();
let ast = parse(&source).unwrap();
let graph = RefGraph::from_ast(&ast).unwrap();

println!("Topics: {}", graph.topic_count());
println!("Unreachable: {:?}", graph.unreachable_topics());
println!("Unused actions: {:?}", graph.dead_actions());

Individual Crates

The umbrella crate re-exports everything, but you can depend on individual crates directly:

Crate	docs.rs	Description
busbar-sf-agentscript		Lexer, parser, AST, serializer, semantic validator, and graph analysis
busbar-sf-agentscript-lsp		LSP server binary

AgentScript Language

AgentScript (.agent) is an indentation-sensitive (3-space) YAML-like language for defining Agentforce agent behavior. Example:

config:
   agent_name: MyAgent

variables:
   customerName: ""

start_agent:
   message: Hello! How can I help you today?

topics:
   - topic: SupportTopic
     instructions: Handle customer support requests.

     actions:
        - action: LookupCase
          type: FlowAction
          api_name: Look_Up_Case

See agent-script-recipes for real-world examples.

Workspace

src/                                        — parser, graph analysis, WASM bindings
crates/
  lsp/      busbar-sf-agentscript-lsp       — LSP server binary

packages/                                   — VS Code extension
plugin-agency/                              — SF CLI plugin (sf agency *)
tree-sitter-agentscript/                    — Tree-sitter grammar
zed-extension/                              — Zed editor extension
agent-script-recipes/                       — test fixtures (git submodule)

Contributing

See CONTRIBUTING.md. All contributions are welcome.

Local Setup

git clone https://github.com/composable-delivery/busbar-sf-agentscript
cd busbar-sf-agentscript
git submodule update --init         # recipe test fixtures
git config core.hooksPath .githooks # enable pre-commit checks

The pre-commit hook runs cargo fmt --check and cargo clippy -- -D warnings before every commit, matching CI exactly.

License

Licensed under either of

• MIT License
• Apache License, Version 2.0

at your option.