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HoloViz meetings

https://hackmd.io/@holoviz/minutes/edit

HoloViz meetings are usually for general planning and status discussions. See https://hackmd.io/@holoviz/BygVgIC6L for the triaging checklist, and https://status.holoviz.org for the list of projects to triage.

2025-09-22 HoloViz Steering Committee Meeting

Tentative Agenda:

  • Repo/Org reorganizing
  • New incubator repos: holoviz-mcp, holoviz-insights
  • Increasing non-Anaconda board activity
    • Thought leadership, goals, roadmapping
    • Need to engage steering members more
  • Certain metrics indicate potential issues
    • Slightly fewer website visits
    • Few new contributors, but this has been consistent
  • What can we do about this?
  • External ecosystem analysis..
    • what are people using? e.g. Marimo, etc

2025-09-12 HoloViz Meeting

Attendees: Demetris, Andy, Jean-Luc, Philipp, Isaiah, Jim, Simon, Andrew, Mateusz

Core Packages

Bokeh

  • Next release 3.8:
    • Addressing issues from SizeBar PR review
    • This is the last thing to figure out before release

Panel

  • Last release (pip, conda-forge: 1.7.5), (defaults: 1.7.0)
  • Next releases:
    • 1.8.0
      • Bokeh 3.8, reconnection system
      • Will release shortly after 3.8
    • Simon to follow up with Mateusz today about Bokeh release
    • pypi-stats has been down for a week, unmaintained
  • Dashboard: Packages failing, no status for docs, tests

Lumen

  • Last release (pip, conda-forge: 0.10.1), (defaults: 0.9.0)
  • Next releases:
    • 0.11.0
      • Working on SQL agent improvements
      • new UI
      • UI/UX being worked on by designer (Krissy)
      • Milestones being drawn up
      • Reports feature in development
      • input file in text box area
  • Dashboard: docs failing

HoloViews

  • Last release (pip, conda-forge, defaults): 1.21.0
  • Next releases:
    • 1.21.1 (soon)
      • Synthetic legend for any categorical
      • Filtering to hover tool
      • SizeBar
      • waiting on Bokeh 3.8, then Panel release

hvplot

  • Last release (pip, conda-forge, defaults): 0.12.0
    • 0.12.0

  • Next releases:

Datashader

  • Last release (pip, conda-forge: 0.18.2), (defaults: 0.18.2)
    • quadmesh issue resolved and released
    • xarray group filed a new issue
      • Andy and Simon to pair on this

Param

Last release (pip, conda-forge: 0.18.2), (defaults: 0.18.2)

holoviz-mcp

  • At some point, integrate into a HoloViz org

panel-material-ui

  • Last release (pip: 0.4.0), (conda-forge: 0.4.0), (defaults: NONE)
    • 0.4.1 soon, addressing some issues

GeoViews

  • Release this week: 1.14.1
    • update to cartopy that broke maps.. dynamically updates crs when loading data

Others: Colorcet, hvsampledata, GeoViews

General HoloViz

Conferences

  • JupyterCon CFP submitted on Lumen in JupyterLab
  • Maxime submitted diatixis talk to PyCon France, PyData Global

NF SDG

  • Proposal Submission Deadline: Aug 29
    • Maybe about improving AI-docs..
      • markdown version of each doc website
      • improving MCP server

Meetings

  • Next steering committee meeting August 22nd:
    • Repo/Org reorganizing.. incorporating holoviz-mcp, holoviz-insights
    • Increasing non-Anaconda board activity
      • Thought leadership, goals, roadmapping
      • Need to engage steering members more
    • Certain metrics indicate potential issues
      • Slightly fewer website visits
      • Few new contributors, but this has been consistent
    • What can we do about this?
    • External ecosystem analysis..
      • what are people using? e.g. Marimo, etc

External Ecosystem

Marimo

  • HoloViz works here
  • Gaining users

Jupyter

  • Anaconda is looking to hire a Jupyter maintainer

Dask

  • Dask is on skeleton maintenance mode
    • dask-expr
  • cubed is gaining traction
  • Ray is another option

2025-07-29 HoloViz Meeting

Attendees: Demetris, Marc, Andy, Jean-Luc, Philipp, Mateusz, Andrew, Maxime, Isaiah

Bokeh

  • Next release 3.8:
    • Session reconnect
    • hit filtering
    • side panel
    • maybe layout improvements
    • RC out soon

Core Packages

Panel

  • Last release (pip, conda-forge: 1.7.5), (defaults: 1.7.0)
    • 1.7.5: Security issue addressed, no CVE. (jinja injection)
  • Next releases:
    • 1.8.0
      • Bokeh 3.8
      • Reconnection system
        • Might help with datashader timeout
  • First time it had 100k downloads in a day
  • Dashboard: Tests failing

Lumen

  • Last release (pip, conda-forge: 0.10.1), (defaults: 0.9.0)
  • Next releases:
    • 0.11.0
      • Working on SQL agent improvements
      • new UI
      • UX being worked on by UX designer
      • Milestones being drawn up
  • Dashboard: Tests failing

HoloViews

  • Last release (pip, conda-forge, defaults): 1.21.0

hvplot

Datashader

Param

Geoviews

  • Dashboard: Tests failing

holoviz-mcp

panel-material-ui

  • Last release (pip: 0.3.3), (conda-forge: 0.3.1), (defaults: NONE)
    • 0.4.0 release coming soon
      • Default sizing is larger than Panel components.. may need to adjust

Others: Colorcet, hvsampledata

General HoloViz

Conferences

  • JupyterCon CFP submitted on Lumen in JupyterLab
  • Consider PyData Global deadline Aug 6 (December 9-11, 2025)
  • Maxime submitted diatixis talk to PyCon France, PyData Global

NF SDG

  • Proposal Submission Deadline: Aug 29
    • Maybe about improving AI-docs..
      • markdown version of each doc website
      • improving MCP server

Meetings

  • Next steering committee meeting in August 22nd

2025-07-15 HoloViz Meeting

Attendees: Demetris, Andy, Jean-Luc, Philipp, Mateusz, Jim, Andrew, Maxime, Isaiah,

Core Packages

Panel

  • Last release (pip, conda-forge: 1.7.4), (defaults: 1.7.0)
    • Release notes for 1.7.4?
  • Next releases:
    • 1.7.5
      • to address medium vulnerability found in templates
    • 1.8.0 in a couple of weeks
  • Dashboard: Tests failing

Lumen

  • Last release (pip, conda-forge: 0.10.1), (defaults: 0.9.0)
    • PMui merged
  • Next releases:
    • 0.11.0
      • Working on SQL agent improvements
      • new UI
  • AH: Outstanding task to update Lumen CHANGELOG/release notes

HoloViews

  • Last release (pip, conda-forge, defaults): 1.21.0
  • JLS: check if there's an issue for "Archive functionality should at least mention in the docs if it can't support JupyterLab"

hvplot

  • Last release (pip, conda-forge, defaults): 0.11.3
  • Next releases:
    • 0.12.0
      • Working on docs
      • Docs versioning, also experimenting with nbsite

Datashader

  • Last release (pip, conda-forge: 0.18.1), (defaults: 0.18.0)

Param

  • Multiple attempts at Typing in param (most recently Marc)
  • Philipp suggested in PR about starting from where Simon left off
  • Trailets may be a good model.. separate overloads for allow_none cases
  • Maxime could start early Sept (Philipp may address before)

Geoviews, Colorcet, hvsampledata

Other Packages

holoviz-mcp

panel-material-ui

  • Released 0.3.0 July 11th
  • New release this week

General HoloViz

Conferences

  • PyData Berlin (Maxime, early Sept)
    • hvPlot docs diataxis process
  • JupyterCon CFP (Nov) brainstorming
    • Maybe lumen export to notebook
    • Brainstorming extension in Jlab pane to interact with lumen
  • SciPy recap (Andrew)
    • Xarray
      • Xarray promoted their releases well, compared to HoloViz
      • flexible indexes; slice using units
      • Datatree merged..
        • TODO: DR: update multichannel timeseries example to import xarray datatree directly
      • Xarray for biology.. why use is low? They hypothesize that it's the lack of relevant examples/guidelines
    • VirtualiZarr (user friendly kerchunk)
      • Might be useful for anndata remote access
    • LLM interfaces
      • Shiny has a Lumen-equivalent.. lots of interest
      • Maybe host a lumen deployment on Gemini?? or???
        • DuckDB-dependent version will probably not be WASM based; feature limitations of pyodide compiled DuckDB

NF SDG

  • Proposal Submission Deadline: Aug 29

Meetings

  • Next steering committee meeting sometime in August. Topics?
  • DR will draft a proposal based on the HoloViz Repo ReOrg outline for steering committee meeting and then start executing on the plan if there's consensus.

Status Dashboard Interim updates

  • Isaiah (?):
    • Add last release dates
    • Add panel-material-ui

Setting up repos

  • Only one copier template process (for panel extensions)
  • Other repo's have been set up differently
  • let's converge on an approach, especially for the HoloViz-maintained packages.. so (DR) add some specific infra requirements to the ReOrg proposal: github workflows, etc

Older minutes

pre2025July28 https://hackmd.io/@T8JKEgo2Q9OeQDdEKsP_SQ/BJ-3pSLPxe
2024H1 https://hackmd.io/k1Ulsd2pQ8K42zCtvsoD3Q
2023 https://hackmd.io/5zt05J9nQyGUIgGNs4Jl2w
2021-2022 https://hackmd.io/wp8PI9AjQFesMh31NebQLA
Pre-2020 https://hackmd.io/@holoviz/holoviz2020

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See https://hackmd.io/@holoviz/minutes for current minutes.

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Archived HoloViz meeting minutes from 2023.

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2021-2022 HoloViz meetings

See https://hackmd.io/@holoviz/minutes for current minutes.

Jan 12, 2023
2020 HoloViz meetings

Archived HoloViz meetings from 2020

Aug 5, 2022
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Published on HackMD