JAML Language Support for VS Code

Curate Balatro seeded runs using JAML (Jimbo's Ante Markup Language) and Jummy syntax. This extension provides syntax highlighting, real-time LSP diagnostics, code completion, snippets, and in-editor seed search powered by the motely-wasm Balatro seed analysis engine.

Features

Syntax Highlighting — JAML and Jummy language support with TextMate grammar
LSP Diagnostics — Real-time validation and error reporting
Code Completion — Autocomplete for JAML root keys and clause types
Seed Search — Run searches directly from .jaml files (Ctrl+Shift+Enter)
Notebooks — Create .jamlnb files mixing markdown documentation with executable JAML filters
Snippets — Boilerplate templates for common filter patterns

Installation

Install from the Visual Studio Code Marketplace: jaml-language-support

Or install the .vsix manually:

code --install-extension jaml-language-support-1.1.5.vsix

Usage

Quick Search

Open or create a .jaml file (YAML format)
Write your filter configuration (see JAML Syntax below)
Click the ▶ Run Search (1M seeds) CodeLens button or press Ctrl+Shift+Enter
Results appear in a side panel with live progress

JAML Syntax

id: my_filter
name: "My Balatro Search"
author: "Your Name"
deck: Red
stake: Gold

must:
  - joker: [Eternal, Blueprint]
  - boss: The Psychic

should:
  - joker: Brainstorm
    score: 50

See JAML Schema for complete documentation.

Jummy Syntax (Shorthand)

For quick searches, use Jummy — a simpler syntax that compiles to JAML:

Eternal Blueprint in Ante 1
The Psychic boss

Notebooks

Create .jamlnb files to mix markdown documentation with executable filters:

[
  { "kind": "markdown", "source": "# My Search Strategy\n\nFinding Eternal Blueprint combos..." },
  { "kind": "filter", "source": "id: eternal_blueprint\ndeck: Red\nmust:\n  - joker: [Eternal, Blueprint]" },
  { "kind": "markdown", "source": "## Results Analysis" }
]

Each cell runs independently — useful for exploring different filter approaches.

Keybindings

Ctrl+Shift+Enter — Run search on current JAML/Jummy file

Settings

No configuration required. The extension works out of the box.

Contributing

Issues and pull requests welcome: MotelyJAML

License

MIT

Jimbo's Ante Markup Language

pifreak