---
title: "Changes to POST /api/kernel/save"
method: POST
path: "/api/kernel/save"
---

# Changes to POST /api/kernel/save

`POST /api/kernel/save`

> Every recorded change to this operation, newest first.

## Timeline

Changed in 3 of 91 revisions.

- **2026-09-23** `84d7ecac5d3a`: 1 info
- **2026-03-31** `41bba414df27`: 1 breaking
- **2026-03-18** `f29fa637d35b`: 1 info

## Changes

- **2026-09-23** `84d7ecac5d3a`: 1 info
  - added the new optional request property `configs/items/expand_output`
- **2026-03-31** `41bba414df27`: 1 breaking
  - the `cellIds/items/` request property format changed from no format to `cell-id`
- **2026-03-18** `f29fa637d35b`: 1 info
  - the `cellIds/items/` request property format was generalized from `cell-id` to no format

---

[Operation](https://skmtc.dev/marimo-team/apis/marimo-api/docs/api/kernel/save/post.md) - [API](https://skmtc.dev/marimo-team/apis/marimo-api.md) - [Page](https://skmtc.dev/marimo-team/apis/marimo-api/changes/api/kernel/save/post)