| Document And Entity Information | May 13, 2024 |
| Cover [Abstract] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | May 13, 2024 |
| Entity Registrant Name | Turnstone Biologics Corp. |
| Entity Central Index Key | 0001764974 |
| Entity Emerging Growth Company | true |
| Entity File Number | 001-41747 |
| Entity Incorporation, State or Country Code | DE |
| Entity Tax Identification Number | 83-2909368 |
| Entity Address, Address Line One | 9310 Athena Circle, Suite 300 |
| Entity Address, City or Town | La Jolla |
| Entity Address, State or Province | CA |
| Entity Address, Postal Zip Code | 92037 |
| City Area Code | (347) |
| Local Phone Number | 897-5988 |
| Entity Information, Former Legal or Registered Name | N/A |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Ex Transition Period | false |
| Title of 12(b) Security | Common Stock ($0.001 par value) |
| Trading Symbol | TSBX |
| Security Exchange Name | NASDAQ |
