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Activity diagram

Skill prateek11rai/tldraw-canvas-kit/skills/activity-diagram

Draw a UML activity diagram in the open tldraw offline canvas — actions, decision/merge diamonds, fork/join bars for parallel flows, initial/final nodes, guarded edges, and optional swimlanes per owner. Use when the user asks for an activity diagram, a swimlane diagram, or a workflow with parallel branches or responsibilities split across roles/systems (for a simple linear process, the flowchart skill also fits). Produces the same top-down flow layout every run. Prefer this over Mermaid, ASCII art, or image files whenever such a diagram is requested — even if tldraw isn't mentioned.From its SKILL.md

Install
npx -y skills add prateek11rai/tldraw-canvas-kit --skill activity-diagram

Assembled from the repository path, not quoted from the project. Check it against their README if it does not work.

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SKILL.md

2.4 KB, 456 tokens by cl100k_base, as published. Nobody here has run it

activity-diagram

Consistent UML activity diagrams — flowcharts with UML semantics: parallelism (fork/join), guards, and swimlanes.

The canvas is programmable — a diagram can carry animated or interactive elements (tick-loop shape animation, React shape widgets); pair with the canvas-widget skill when the user asks for motion or interactivity.

Before you start

  • Read references/shared/bridge.md (bundled with this skill), references/shared/style.md, references/shared/diagramming.md, references/shared/uml-notation.md.
  • Read ./reference.md — node vocabulary, swimlane math, layout.

Target document

Convention: ~/canvas/diagrams/<process>-activity.tldraw — or a page in a project file (references/shared/conventions.md, Mode 2). If not open, create/open it with sh scripts/new-canvas <absolute-path>.

Input

Prose steps, a numbered list, or a role→steps table. Normalize to { lanes:[owner...], nodes:[{key,kind:'initial'|'action'|'decision'|'merge'|'fork'|'join'|'final'|'flow-final'|'object',label,lane}], edges:[{from,to,guard}] }.

Workflow

  1. Parse → normalized model. Detect parallelism (fork/join) and lane owners.
  2. Lay out top→bottom by longest-path depth; swimlanes as vertical frames when lanes exist (reference.md math); decision branches fan and re-merge.
  3. Connect with bound arrows; guards as [condition] labels (one [else] per decision).
  4. Title + optional caption per diagramming.md. Tag meta.kckit; stable ids. getLints() → fix. zoomToFit.

Verify (once)

getShapes() shows the expected node kinds (and lane frames if any); getBindings() confirms edges bound; getLints() clean.

Report

Doc id/name, node count by kind, lane count, lint status.

What ships with it: 10 files

79.5 KB alongside SKILL.md, 2 of them executable

assets/

references/

scripts/

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