0.40.0

Rerun is an easy-to-use database and visualization toolbox for multimodal and temporal data.

• Python: pip install -U rerun-sdk
• Rust: cargo add rerun and cargo install rerun-cli --locked
• C++ FetchContent: https://github.com/rerun-io/rerun/releases/download/0.40.0/rerun_cpp_sdk.zip
• Online demo: https://rerun.io/viewer

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✨ Overview & highlights

• Viewer design refresh: a new home screen, a command palette in the top bar, and consistent typography and colors

  

• Agents can inspect transform graphs via MCP with rerun_get_transform_graph

• Catalog API improvements: Segment and Layer handles, DatasetEntry.schema(), and DatasetEntry.info()

• The selection panel shows which layers a component comes from

  

• Edit asset coverage in the Viewer (video)

• Asset3D assets without normals are shaded

  

🧪 Experimental and unstable

These may change in future releases, and unstable types may not stay backwards compatible.

• Table filters and sorting in the table blueprint, and much faster filters
• LeRobot dataset metadata with LeRobotReader.metadata()

📖 Release notes: https://rerun.io/docs/changelog/changeset-0-40#highlights

⚠️ Breaking changes

• Python 3.11 is the minimum supported version
• DatasetView renamed to DatasetSelection
• Rust: catalog methods moved from re_redap_client to re_catalog_client

🧳 Migration guide: https://rerun.io/docs/changelog/changeset-0-40#breaking-changes

🔎 Details

🪵 Log API

• Add LeRobot dataset metadata utilities c9be0f6
• Bound gRPC connection retries during shutdown f786516

🐍 Python API

• Drop Python 3.10 support 2fbbe04
• Introduce Segment handle in Python Catalog client 0d03800
• Add Layer handle to Python Catalog SDK 8c384a2
• Add dataset.info() and related structures 826db1e
• Add .schema() on dataset and segment objects in Python e1f1658
• Table blueprint filter API cb454f9
• Answer open_url once its initial load is done 6c2c3be

🪳 Bug fixes

• Reject TLS certificates from the compromised eMudhra intermediate CAs (RUSTSEC-2026-0381, RUSTSEC-2026-0382, RUSTSEC-2026-0383) 4b14970
• Fix anamorphic pinhole projection for 3D in 2D projections 55b565d (thanks @mikamikasuki!)
• Don't react to clicks on popups covering the timeline 925dbad
• Stop masking connection errors when credentials are present 0be32f6
• Fix uneditable components showing edit ui 1760c3c
• Disable blueprint UI editing of text-log bodies 2c87e2e
• Make audio work in previews f7f8d6d
• Fix stale Python docs search results bcdd257
• Bump zip to 9 for RUSTSEC-2026-0367/0368/0369 513de14
• Fix flaky internal_catalog_load snapshots: refetch the catalog listing for an unknown entry 500fc27
• Fix flaky test_filter_planning_errors: send a table query's schema together with its first batch e6ffe84

🌁 Viewer improvements

• Show what layers a component is from b00ca6d
• Asset coverage edit UI 1405a80
• Compute Asset3D normals when they are missing 7df8021
• Table blueprint undo & redo a8f579e
• Add MCP interface for inspecting transform graphs 9184397
• Answer viewer-control operations once their commands have run cc15755
• Emit LeRobot v2 videos as VideoStream, like v3 d0afc97

🚀 Performance improvements

• Remove custom filter UDFs and only use SQL 54c35bd
• Drastically speed up text log view for huge amount of text logs 3af1922
• Keep fetched dataloader columns chunked instead of copying them 6910b32
• Further simplifications to manifest validation 62a6d0f

🖼 UI improvements

• Viewer design refresh ffd18ae

🗣 Refactors

• Add new re_catalog_client crate 5aa3d4e

📦 Dependencies

• Bump the "rerun-example-droid-semantic-search" group with 1 update across multiple ecosystems 3277139

🤷‍ Other

• Save table filters in table blueprint b0563bd
• Add sorting by column in table blueprint da5ce19
• Rename DatasetView to DatasetSelection 0439052