fix completions in slides view

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📝 Summary

Jedi requires cell-id props to resolve completions. This adds a fix to the slide cell editor.

Also hides the inline "Edit with AI" tooltip for slides. It's trickier to position it correctly, and I think for slides, this is a better default anyways.

/**
 * Completion source for Python, using Jedi.
 */
export const pythonCompletionSource: CompletionSource = async (
  context: CompletionContext,
): Promise<CompletionResult | null> => {
  const query = context.state.doc.sliceString(0, context.pos);
  const element = document.activeElement;
  let cellId: CellId | null = null;
  if (element !== null) {
    const cellContainer = HTMLCellId.findElement(element);
    if (cellContainer !== null) {
      cellId = HTMLCellId.parse(cellContainer.id);
    }
  }

  if (cellId === null) {
    Logger.error("Failed to find active cell.");
    return null;
  }

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• For large changes, or changes that affect the public API: this change was discussed or approved through an issue, on Discord, or the community discussions (Please provide a link if applicable).
• Any AI generated code has been reviewed line-by-line by the human PR author, who stands by it.
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✅ Merge Checklist

• I have read the contributor guidelines.
• Documentation has been updated where applicable, including docstrings for API changes.
• Tests have been added for the changes made.

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Project	Deployment	Actions	Updated (UTC)
marimo-docs	Ready	Preview, Comment	Jun 3, 2026 8:05am

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Pull request overview

This PR fixes Python/Jedi autocompletions in the slides “show code” editor by ensuring the slide cell editor wrapper has the same cell-identifying DOM attributes/id convention used elsewhere in the app (so the active cell can be discovered via HTMLCellId.findElement(...)).

Changes:

• Import and reuse cellDomProps in the slides cell editor view.
• Apply cellDomProps(cell.id, cell.name) to the slide cell editor wrapper div so it gets an id like cell-<CellId> plus data-cell-* attributes.