Lark CLI Skill: Whiteboard — Chart & DSL Rendering

What it is

This CLI skill extends Lark (Feishu) with the ability to render charts and diagrams on whiteboards using a DSL (Domain-Specific Language). It turns text-based descriptions into visual content on Lark whiteboards programmatically.

The skill targets teams using Lark for collaboration who want to automate the creation of diagrams, flowcharts, and data visualizations directly from their development workflows or CI pipelines.

The project is actively maintained and suitable for both individual developers and teams looking to integrate it into their existing toolchain. Documentation and community support are available for onboarding.

How it saves time or tokens

Manually creating charts and diagrams in a whiteboard tool is time-consuming and hard to version control. This skill lets you define visuals as code, generate them with a command, and update them by changing the DSL definition. The chart-as-code approach makes diagrams reproducible and diffable in version control.

For teams evaluating multiple tools in the same category, the clear documentation and active community reduce the time spent on research and troubleshooting. Getting started takes minutes rather than hours of configuration.

How to use

1. Install the Lark CLI skill in your Claude Code or Gemini CLI environment.
2. Write a chart definition using the supported DSL syntax (Mermaid, PlantUML, or custom Lark DSL).
3. Run the skill command to render the chart on a specified Lark whiteboard.
4. Share the whiteboard link with your team for review and collaboration.

Example

# Chart definition for Lark whiteboard
chart:
  type: flowchart
  title: 'CI/CD Pipeline'
  nodes:
    - id: build
      label: 'Build'
    - id: test
      label: 'Test'
    - id: deploy
      label: 'Deploy'
  edges:
    - from: build
      to: test
    - from: test
      to: deploy
  style:
    theme: corporate
    direction: LR

# Render the chart on a Lark whiteboard
lark-cli whiteboard render --config chart.yaml --board-id abc123

Related on TokRepo

• AI Tools for Documentation — Documentation and diagram generation tools.
• AI Tools for No-Code — Visual creation tools with code-based alternatives.

Common pitfalls

• Not authenticating with Lark API before running the skill. You need a valid Lark app token with whiteboard write permissions.
• Using complex nested charts that exceed whiteboard rendering limits. Keep charts to under 50 nodes for reliable rendering.
• Forgetting to set the board-id parameter, which causes the skill to create a new whiteboard instead of updating an existing one.
• Applying the skill without reading the documentation first. Each skill has specific prerequisites and configuration requirements that affect the quality of results.