oppi.li
source dump of claude code
1import { createHash, randomUUID } from 'crypto'
2import { tmpdir } from 'os'
3import { join } from 'path'
4
5/**
6 * Generate a temporary file path.
7 *
8 * @param prefix Optional prefix for the temp file name
9 * @param extension Optional file extension (defaults to '.md')
10 * @param options.contentHash When provided, the identifier is derived from a
11 * SHA-256 hash of this string (first 16 hex chars). This produces a path
12 * that is stable across process boundaries — any process with the same
13 * content will get the same path. Use this when the path ends up in content
14 * sent to the Anthropic API (e.g., sandbox deny lists in tool descriptions),
15 * because a random UUID would change on every subprocess spawn and
16 * invalidate the prompt cache prefix.
17 * @returns Temp file path
18 */
19export function generateTempFilePath(
20 prefix: string = 'claude-prompt',
21 extension: string = '.md',
22 options?: { contentHash?: string },
23): string {
24 const id = options?.contentHash
25 ? createHash('sha256')
26 .update(options.contentHash)
27 .digest('hex')
28 .slice(0, 16)
29 : randomUUID()
30 return join(tmpdir(), `${prefix}-${id}${extension}`)
31}