Function generateModelMetaString

scripts/convert-openrouter-models.ts:139–295

(model: OpenRouterModel)

}

function generateModelMetaString(model: OpenRouterModel): string {
  const inputModalities = model.architecture.input_modalities
    .map(mapInputModality)
    .filter((m): m is InputModality => m !== null)
  const outputModalities = model.architecture.output_modalities
    .map(mapInputModality)
    .filter((m): m is InputModality => m !== null)
  // OpenRouter uses `~prefix/name` to denote routing aliases (e.g.
  // `~anthropic/claude-haiku-latest`). The model ID itself is preserved as a
  // string literal so users can pass it to `chat({ model: ... })`. The leading
  // `~` is mapped to `_` only for the derived constant name so it's a valid
  // JavaScript identifier.
  const constName = model.id
    .replaceAll('~', '_')
    .replaceAll('/', '-')
    .replaceAll('-', '_')
    .replaceAll('.', '_')
    .replaceAll(':', '_')
    .toUpperCase()
  // Safety net: if a future OpenRouter ID quirk produces a non-identifier
  // constant name, fail loudly here instead of letting prettier choke on the
  // generated file later in the pipeline.
  if (!/^[A-Z_][A-Z0-9_]*$/.test(constName)) {
    throw new Error(
      `Generated constant name is not a valid JS identifier: ${JSON.stringify(
        constName,
      )} (from OpenRouter model.id ${JSON.stringify(
        model.id,
      )}). Extend the constName sanitiser to handle this case.`,
    )
  }
  // Ensure at least 'text' is present
  if (!inputModalities.includes('text')) {
    inputModalities.unshift('text')
  }
  const nonChatFamilies = ['lyria', 'veo', 'imagen', 'sora', 'dall-e', 'tts']
  const isNonChat = nonChatFamilies.some((f) =>
    model.id.toLowerCase().includes(f),
  )
  if (outputModalities.includes('text') && !isNonChat) {
    chatModels.add(`${constName}.id`)
  }
  if (outputModalities.includes('image')) {
    imageModels.add(`${constName}.id`)
  }
  if (outputModalities.includes('video')) {
    videoModels.add(`${constName}.id`)
  }
  const inputPrice = convertPricing(model.pricing.prompt)
  const outputPrice = convertPricing(model.pricing.completion)
  const imagePrice = convertPricing(model.pricing.image ?? '0', true)
  const inputCacheReadPrice = convertPricing(
    model.pricing.input_cache_read ?? '0',
  )
  const inputCacheWritePrice = convertPricing(
    model.pricing.input_cache_write ?? '0',
  )