Sourced from marimo's releases.

0.22.0

What's Changed

This release brings a unified data table explorer, reliability improvements to the programmatic notebook API that power the new marimo-pair agent skill, smarter numeric formatting in tables, faster mo.persistent_cache, and a contextual tips system in the CLI.

⭐ Highlights

Combined row viewer and column explorer

The row viewer and column explorer panels are now unified into a single tabbed "Table Explorer" pane. A single toolbar button opens and closes the panel; Rows and Columns tabs live inside it, and your selected tab persists across open/close.

Pair programming with marimo-pair

The experimental _code API receives reliability fixes in this release, enabling the new marimo-pair agent skill for pair programming in marimo notebooks.

npx skills add marimo-team/marimo-pair

🚨 Breaking changes

mo.image no longer normalizes uint8 values (#8889)

Previously, mo.image() normalized all numeric arrays (including uint8) to the [0, 1] float range. Now, uint8 arrays are always rendered with values in [0, 255] without normalization. Two new parameters — vmin and vmax — let you set explicit value bounds for under- or over-saturated displays. If you relied on the old uint8 normalization, pass vmin=0, vmax=1 explicitly.

__marimo__ location now follows sys.pycache_prefix (#8797)

The __marimo__ directory now respects sys.pycache_prefix, consistent with Python's own __pycache__ placement. This also fixes cache placement for notebooks in nested directories. Existing caches will not be migrated — they can be safely deleted.

Cache version bump (#8793)

The cache format version has been bumped, invalidating existing caches.

✨ Enhancements

• Remove auto-instantiate from /api/execute endpoint (#8943)
• Use document as source of truth in code_mode _apply_ops (#8944)
• Enhance SQLAlchemy engine with safe_execute and inspector methods for SnowFlake (#8920)
• Support custom cloudpathlib providers in path normalization (#8929)
• Use variable name as download filename in dataframe viewer (#8811)
• Unify row viewer and column explorer (#8905)
• Fix hide_code not taking effect on kernel-created cells (#8926)
• Virtualize data table rows when pagination is disabled (#8899)
• Emit document transactions from --watch file reload (#8846)
• Remove document mutation from session.notify() (#8886)
• Style fix for li & ol: reduce margin and restore original disc (#8768)
• Avoid selecting cells in table when interactive elements (#8862)
• Lazy-load KaTeX via dynamic import of @​streamdown/math (#8874)
• Display startup tips in CLI (#8836)
• Add ListSQLSchemas to support lazy schema fetching in datasource panel (#8824)

... (truncated)

• 7d07685 release: 0.23.0 (#9099)
• c24d480 fix: properly authenticate terminal route (#9098)
• 78489d4 feat(plotly): add reactive area chart selection support (#9046)
• 8649f3b feat(plotly): add reactive violin plot selection support (#9011)
• 3ed090f feat: Accept suggestion on Enter (frontend-only localStorage pref) (#9016)
• 8d1ea4a fix use API.get for pair with agent modal (#9090)
• e072d9f docs: fix a misformatted markdown link (#9093)
• 55b1f86 fix: table filtering by NaN in pandas string columns (#9092)
• 986886f fix: reset Plotly axis settings when switching between different chart types ...
• eade4fe feat: indicate server side installations (#8998)
• Additional commits viewable in compare view

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