Provider Converters

Convert prompts to OpenAI, Anthropic, Google, Vercel AI, LangChain

Provider Converters

Provider converters transform Echostash prompts into the native format of any LLM provider. Each converter handles role mapping, message format conversion, tool definition translation, and model config extraction.

Supported Providers

Provider	Method	System Messages	Tool Format
OpenAI	`.openai()`	As `system` role message	OpenAI function calling
Anthropic	`.anthropic()`	Extracted to top-level `system` field	Anthropic tool format
Google Gemini	`.google()`	As `systemInstruction`	`functionDeclarations`
Vercel AI	`.vercel()`	As `system` role message	Keyed tool record
LangChain	`.langchain()`	As `SystemMessage` type	Name/description/schema

OpenAI Example

const result = await es.prompt("agent").vars({ task: "summarize" }).openai()

await openai.chat.completions.create({
  ...result,  // spread messages, tools, model, temperature
})

Anthropic Example

const result = await es.prompt("agent").vars({ task: "summarize" }).anthropic()

await anthropic.messages.create({
  system: result.system,
  messages: result.messages,
  tools: result.tools,
  model: result.model,
  max_tokens: result.max_tokens,
})

Google Gemini Example

const result = await es.prompt("agent").vars({ task: "summarize" }).google()
// result.contents, result.tools, result.generationConfig