Function unsupportedParts

packages/opencode/src/provider/transform.ts:374–410

(msgs: ModelMessage[], model: Provider.Model)

}

function unsupportedParts(msgs: ModelMessage[], model: Provider.Model): ModelMessage[] {
  return msgs.map((msg) => {
    if (msg.role !== "user" || !Array.isArray(msg.content)) return msg

    const filtered = msg.content.map((part) => {
      if (part.type !== "file" && part.type !== "image") return part

      // Check for empty base64 image data
      if (part.type === "image") {
        const imageStr = String(part.image)
        if (imageStr.startsWith("data:")) {
          const match = imageStr.match(/^data:([^;]+);base64,(.*)$/)
          if (match && (!match[2] || match[2].length === 0)) {
            return {
              type: "text" as const,
              text: "ERROR: Image file is empty or corrupted. Please provide a valid image.",
            }
          }
        }
      }

      const mime = part.type === "image" ? String(part.image).split(";")[0].replace("data:", "") : part.mediaType
      const filename = part.type === "file" ? part.filename : undefined
      const modality = mimeToModality(mime)
      if (!modality) return part
      if (model.capabilities.input[modality]) return part

      const name = filename ? `"${filename}"` : modality
      return {
        type: "text" as const,
        text: `ERROR: Cannot read ${name} (this model does not support ${modality} input). Inform the user.`,
      }
    })

    return { ...msg, content: filtered }
  })
}

function mapProviderOptions(
  msgs: ModelMessage[],