model_language (Elixir)

Elixir bindings for model-language — a typed, safe template language for AI-agent prompts. Runs the exact same engine as the JavaScript/TypeScript package via an embedded WebAssembly module: byte-for-byte identical output, guaranteed by a shared conformance suite.

# mix.exs
def deps, do: [{:model_language, "~> 1.0"}]

ModelLanguage.render(
  "Hi {{ user.name | default: 'there' }}!",
  data: %{"user" => %{"name" => "Vasyl"}}
)["text"]
# => "Hi Vasyl!"

• render(template, data:, schema:, options:) → %{"text", "warnings", "resolvedBranches", "directives", "tokenEstimate"}
• validate(template, schema:, options:) → %{"diagnostics", "maxTokenEstimate"}
• parse(template) → %{"ast", "diagnostics"}

Never raises for template problems — they degrade to empty output plus a warning. Pass options: %{"now" => epoch_ms} for datetime filters.