Function truncateOpenAiCallId

src/utils/tool-id.ts:25–42

(id: string, maxLength: number = OPENAI_CALL_ID_MAX_LENGTH)

 * @returns The truncated ID, or original if already within limits
 */
export function truncateOpenAiCallId(id: string, maxLength: number = OPENAI_CALL_ID_MAX_LENGTH): string {
	if (id.length <= maxLength) {
		return id
	}

	// Use 8-char hash suffix for uniqueness (from MD5, sufficient for collision resistance in this context)
	const hashSuffixLength = 8
	const separator = "_"
	// Reserve space for separator + hash
	const prefixMaxLength = maxLength - separator.length - hashSuffixLength

	// Create hash of the full original ID for uniqueness
	const hash = crypto.createHash("md5").update(id).digest("hex").slice(0, hashSuffixLength)

	// Take the prefix and append hash
	const prefix = id.slice(0, prefixMaxLength)
	return `${prefix}${separator}${hash}`
}

/**
 * Sanitize and truncate a tool call ID for OpenAI's Responses API.