# Introduction
closes https://github.com/twentyhq/private-issues/issues/484
This PR refactors the writeFile API to never expect to be passed a
mimetype, its extract is done programmatically low level so any callers
will pass through
Same for the file sanitization
## IANA override
Disclaimer for consistency we existing behavior we wanted to always have
`application/typescript`
- should we rather consider fallbacking to octect-steam instead ?
- Any pulbic assets that has .ts will now also fallback to
`application/typescript` instead of the official IANA
## Integration
Added coverage