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adding-pane

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Step-by-step guide for adding a new visualization pane type to Visdom (client, server, frontend, tests)

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How to use this skill

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Source SKILL.md: https://github.com/fossasia/visdom/blob/HEAD/.agents/skills/adding-pane/SKILL.md

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Skill: Adding a New Pane Type

When to Use

Use this skill when adding a new visualization type (e.g., a new chart, widget, or media pane) to Visdom.

Core Workflow

  1. Python Client (py/visdom/__init__.py):

    • Add a new method to the Visdom class with @pytorch_wrap
    • Format data as {"data": [{"type": "my_type", "content": ...}], ...}
    • Call self._send(msg) to POST to /events

  2. Server (py/visdom/utils/server_utils.py):

    • Add a new elif ptype == "my_type": branch in the window() function (around line 202)
    • Define what fields are stored in the window dict

  3. Frontend (js/panes/):

    • Create MyPane.js following the pattern in TextPane.js or ImagePane.js
    • Use forwardRef + React.memo pattern from Pane.js

  4. Registration (js/settings.js):

    • Add my_type: MyPane to the PANES object
    • Add default size to PANE_SIZE: my_type: [width, height]

  5. Type stubs (py/visdom/__init__.pyi):

    • Add the method signature for type checking

  6. Demo (example/components/):

    • Create a demo script exercising the new pane type
    • Import it in example/demo.py

  7. Tests (cypress/integration/):

    • Add a Cypress test file for the new pane type

Guardrails

  • Always use the @pytorch_wrap decorator on new client methods
  • Follow the forwardRef + React.memo pattern for pane components
  • Import and register new panes in js/settings.js
  • Never manually edit compiled files in py/visdom/static/

Documentation

  • Skill reference
  • py/visdom/__init__.py
  • py/visdom/utils/server_utils.py
  • js/settings.js
  • js/panes/
  • AGENTS.md
  • CONTRIBUTING.md

Assets

  • See assets/README.md and store templates/resources in assets/.

Tests

  • Follow the default flow in references/TESTS.md.