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Tools

The Forester ecosystem includes several auxiliary tools and libraries to help you write, analyze, and execute behavior trees.

IntelliJ Plugin

The Forester IntelliJ Plugin provides native IDE support for the .tree language. Features include:

  • Syntax highlighting
  • Code folding
  • Code navigation
  • Code formatting
  • Code inspections and error highlighting
  • Structure view
  • Built-in tasks to visualize and simulate the tree directly from the IDE

VSCode LSP

The Forester LSP provides language server support for the .tree language in VS Code. Features include:

  • Syntax highlighting via LSP semantic tokens
  • Inline diagnostics (parse errors) via ANTLR4-based parsing
  • Completion (triggered on ", /, and .)
  • Go to definition and find references
  • Document symbols (outline / breadcrumbs)
  • Formatting
  • Comment toggling and bracket matching / auto-closing

CLI (f-tree)

The f-tree command-line interface is the primary utility for testing and manipulating trees without writing boilerplate application code. It supports:

  • Running trees from the file system, configured with optional YAML run profiles.
  • Simulating trees with stubbed actions using YAML profiles.
  • Generating SVG visualizations of the tree structure.
  • Printing built-in standard library headers (e.g., std::actions).