| Document and Entity Information | Mar. 21, 2024 |
| Cover [Abstract] | |
| Amendment Flag | false |
| Entity Central Index Key | 0001764974 |
| Document Type | 8-K |
| Document Period End Date | Mar. 21, 2024 |
| Entity Registrant Name | Turnstone Biologics Corp. |
| Entity Incorporation State Country Code | DE |
| Entity File Number | 001-41747 |
| Entity Tax Identification Number | 83-2909368 |
| Entity Address, Address Line One | 9310 Athena Circle |
| Entity Address, Address Line Two | 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 |
| Written Communications | false |
| Soliciting Material | false |
| Pre Commencement Tender Offer | false |
| Pre Commencement Issuer Tender Offer | false |
| Security 12b Title | Common Stock, $0.001 par value per share |
| Trading Symbol | TSBX |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | true |
| Entity Ex Transition Period | false |
