[WIP] Mitosheet - Column Cards

[ngafar]

Description

Adds the ability to create cards for a column. Cards provide an "at a glance" overview of the column, and quickly explore the data.

Testing

Right click on a column header, and look for the Create Card option. You have to provide a brief description of what the card should contain. Once created, you can click on a cell to see the card.

Note that sometimes the card creation fails. If you re-submit it should work.

Documentation

Yes

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Note

High Risk
Runs LLM-generated Python via exec/eval (restricted builtins but still arbitrary logic on sheet data) and expands persisted analysis state; explore view transpile uses a naive df string replace.

Overview
Adds column cards: per-column “at-a-glance” summaries when you select a cell, plus optional explore links that open related filtered sheets.

Backend: New column_cards on State (serialized to the frontend as columnCards). get_card_template uses the existing LLM stack to return Streamlit-style card code and explore view_code entries; get_card_content runs that code via a StreamlitCardRecorder (exec with a restricted __builtins__) and returns UI blocks. set_column_card / add_explore_view steps persist definitions and materialize explore views (eval on view_code, new sheet with DATAFRAME_SOURCE_EXPLORE). Card definitions can be plain code or JSON {code, explore}.

Frontend (in repo, not fully in diff): SelectionCard overlay, CardsTaskpane, and extensive mito.css for card metrics/tables/alerts; wired through Mito.tsx and API types.

Lifecycle: column_cards is cleared on sheet overwrite and popped on dataframe delete.

^{Reviewed by Cursor Bugbot for commit 72742d1. Configure here.}

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Project	Deployment	Actions	Updated (UTC)
monorepo	Ready	Preview, Comment	Jun 4, 2026 5:51pm

[cursor]

Cursor Bugbot has reviewed your changes and found 1 potential issue.

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^{Reviewed by Cursor Bugbot for commit 72742d1. Configure here.}

[cursor]

st.write duplicates structured blocks

Medium Severity

In StreamlitCardRecorder.write, arguments that already produce a dataframe or table block are still serialized and appended as a plain text block, so cards can show the same data twice (formatted table/grid plus a raw dump).

 

^{Reviewed by Cursor Bugbot for commit 72742d1. Configure here.}