0.16.4

Important Upgrade

This release includes an important fix for Security Release - CWE-441 - Unauthenticated Proxy.

What's Changed

• ci: run changed tests first by @mscolnick in #6595
• fix: remove failing windows test by @dmadisetti in #6597
• chore: move to rolldown by @mscolnick in #6033
• always show generate with ai in column mode when opened by @Light2Dark in #6602
• fix save bug when adding a model by @Light2Dark in #6600
• pass down user-config for /snippets by @mscolnick in #6583
• migrate: zod 4 by @mscolnick in #6599
• Initial hover_template function by @nojaf in #6580
• fix: debounce infinite loop by @mscolnick in #6603
• fix zod schema type errors for data-table by @Light2Dark in #6606
• improvement: narwhals v2 by @mscolnick in #6546
• standardize db icons for sql by @Light2Dark in #6605
• improvement: use lazy-frames for multi-step processing, include more tests by @mscolnick in #6608
• feat: Allow specifying asset_url for ASGI app by @elahmo in #6610
• fix: data-table cellHoverTextSchema validation by @mscolnick in #6613
• altair: set background to transparent for vegafusion if no background is set by @Light2Dark in #6614
• tests: fix formatting test by @mscolnick in #6615
• improvement: cleanup ibis code to share from narwhals table manager by @mscolnick in #6612
• feat: Create frontend tools framework and integrate to backend ai system by @bjoaquinc in #6609
• feat: MCP presets: marimo docs and context7 by @mscolnick in #6619
• Add mapping for 'airflow' to 'apache-airflow' by @koaning in #6622
• add datasource AI context by @Light2Dark in #6618
• chore(deps): update dependency @typescript/native-preview to v7.0.0-dev.20250928.1 by @renovate[bot] in #6616
• enable column explorer for run mode by @Light2Dark in #6626
• slightly lighten dark mode comment in codemirror by @Light2Dark in #6628
• fix: windows globbing for check by @dmadisetti in #6598
• fix: claude 4.0 models by @mscolnick in #6630
• fix: propagate delete in watch mode by @dmadisetti in #6629
• refactor: MPL proxy endpoint by @dmadisetti in #6632

New Contributors

• @elahmo made their first contribution in #6610

Full Changelog: 0.16.3...0.16.4

0.16.3

What's Changed

• fix: fe lint errors by @dmadisetti in #6515
• tests: add some more validation tests for msgspec serialization by @mscolnick in #6514
• strips explain, better error output for sql error by @Light2Dark in #6518
• fix: catch sqlalchemy types by @dmadisetti in #6519
• fix: preserve comments in jupyter conversion by @dmadisetti in #6516
• improvement: support 2-space markdown and paragraphs without newline before lists by @mscolnick in #6512
• Fix anywidget initial buffer handling regression by @manzt in #6520
• fix: whitespace discrepancies on round trip conversions by @dmadisetti in #6521
• Support sticky headers on table by @nojaf in #6486
• add parse function in /validate endpoint for SQL by @Light2Dark in #6517
• improvement: add completion info to SQL table completions by @mscolnick in #6502
• fix: allow empty keys for openai compatible config by @mscolnick in #6525
• runtime fixes for parse_sql, if duckdb not installed by @Light2Dark in #6527
• add databricks to connection form by @Light2Dark in #6528
• only run sqlglot limit check when user sets a limit by @Light2Dark in #6530
• docs: LLM provider configuration by @mscolnick in #6529
• feat: add openrouter as a supported provider by @mscolnick in #6531
• enhancement(msgspec): create BaseStruct with get_pydantic_core_schema class method and refactor MCP msgspec.Struct types to use it by @bjoaquinc in #6540
• fix: handle by mro types from upstream libs by @mscolnick in #6539
• fix: add more expressions for SQL refs by @mscolnick in #6538
• don't override auto-save by when in --watch mode by @mscolnick in #6535
• improvement: google vertex support, make google key optional by @mscolnick in #6537
• fix: anthropic typing breaks by @mscolnick in #6543
• fix(mcp-server): make mcp-server lifespan and startup non-blocking for marimo server by @bjoaquinc in #6545
• fix: switch to depth-first traversal for inOrderIds method by @mscolnick in #6548
• chore: eslint to biome partial migration by @mscolnick in #6552
• chore(deps): update all storybook dependencies to ^9.1.8 by @renovate[bot] in #6554
• fix: matplotlib interactive stability fixes by @dmadisetti in #6550
• quote brackets, and get offset map for column number positioning by @Light2Dark in #6542
• fix: slider input when cleared by @mscolnick in #6557
• lint fixes by @Light2Dark in #6563
• feat: edit files from a Gist url by @crivaronicolini in #6559
• re-enable sql-mode internally by @Light2Dark in #6558
• feat: use mo.inspect in formatters for some basic types by @mscolnick in #6541
• Click filenames in stack trace to open locally in editor by @yairchu in #6556
• improvement: dont show python traceback for sql errors by @mscolnick in #6573
• improvement: cache validation requests for sql linter by @mscolnick in #6574
• optimize validation request for duckdb sql by @Light2Dark in #6578
• devops: make dev explicitly uses the port the pnpm expects (fix #6565) by @yairchu in #6575
• improvement: change output default from above to below by @mscolnick in #6572
• Turns on sql_linter to true by default by @Light2Dark in #6579
• expose feature flag for chat mode by @Light2Dark in #6577
• change ff name, chat_mode by @mscolnick in #6582
• fix[lsp]: allow binary locations with spaces by @dmadisetti in #6569
• chore: Update ruff version in dev dependencies to match pre-commit by @mscolnick in #6585
• internal: remove whitespace in tutorials by @mscolnick in #6588
• docs: add missing docs by @mscolnick in #6586
• Update sqlglot dependency to include 'rs' variant in for better perf by @mscolnick in #6584
• sql linter: add listener to set focus state and parse only when focused by @Light2Dark in #6591
• claude 4.5 by @koaning in #6592
• add simple auto fix button for sql cell by @Light2Dark in #6590
• Prune redundant traceback item at start of all traces by @yairchu in #6589
• feat: marimo check --format=json by @dmadisetti in #6570
• add docs for azure and properly handle endpoint by @Light2Dark in #6587

New Contributors

• @crivaronicolini made their first contribution in #6559
• @yairchu made their first contribution in #6556

Full Changelog: 0.16.2...0.16.3