Unclear Whether notebook edits now behave differently, for example when no cell id is given, is not clear.
What
A Jupyter notebook is an .ipynb file made of separate cells of code and text. When Claude Code looks up a cell by its id, it now uses a shared lookup step. Before, it did the lookup inline, fell back to reading the id as a cell number, and reported the cell as missing when no id was given.
Why
Notebook edits may now find cells in more ways, such as by their position.
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Whether notebook edits now behave differently, for example when no cell id is given, is not clear.