Is the PortalJS Add Chart skill free?

Yes. The skill itself is free from datopian/portaljs. SkillProof publishes the install command and an independent test verdict at no cost.

What is the PortalJS Add Chart SkillProof Score?

9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.

How do I install PortalJS Add Chart?

Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.

Can I use PortalJS Add Chart with Cursor, Copilot, Gemini CLI, Codex or other AI tools?

The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.

PortalJS Add Chart

Adds a gated recharts chart to a PortalJS dataset showcase page.

by datopian · datopian/portaljs

Tested · Works

Install — copy the command Download source ↗

Test report

Verdict: Tested · Works
Score: 9.6/10
Tested: Jul 10, 2026
Environment: Claude Code 2.x (agent harness)
Upstream re-checked: Aug 10, 2026 · cea9b42

Ran a real add-chart pass in a scaffolded PortalJS portal: npm install recharts@^2.15.0 succeeded and tsc --noEmit passed clean; the skill correctly gated the chart to one dataset's showcase while a from-scratch baseline rendered the chart on every dataset's page instead — exactly the bug the SKILL.md warns about.

Scored on four weighted criteria — install, triggering, output vs. baseline, docs. How scoring works

Installs cleanly 5/5
Triggers reliably 5/5
Output vs. baseline 9/10
Docs & honesty 5/5

What PortalJS Add Chart does

Installs recharts, writes a reusable Chart.tsx component, and wires it into a PortalJS dataset showcase's Views section, gated to the chosen dataset so other showcases are unaffected. Supports line, bar, area, pie, and scatter charts reading the same CSV/JSON the table already uses. Triggers when visualizing a dataset already registered in datasets.json inside a PortalJS portal.

How to install PortalJS Add Chart

git clone https://github.com/datopian/portaljs
cd portaljs
mkdir -p ~/.claude/skills
cp -r skills/portaljs-add-chart ~/.claude/skills/portaljs-add-chart

Skills live in ~/.claude/skills/ (global) or .claude/skills/ (per-project). Restart Claude Code after installing.

Commands — how to trigger PortalJS Add Chart

/portaljs-add-chart Adds a gated recharts chart to a PortalJS dataset showcase page.

It also activates on plain-language prompts like these:

Add a bar chart to this PortalJS dataset showcase page
Wire a recharts line chart into my dataset's Views section
Show this registered CSV dataset as a scatter chart on the portal

Frequently asked questions

Is the PortalJS Add Chart skill free?: Yes. The skill itself is free from datopian/portaljs. SkillProof publishes the install command and an independent test verdict at no cost.
Does PortalJS Add Chart work with Claude Code?: We tested it with Claude Code 2.x (agent harness) on Jul 10, 2026. Verdict: Tested · Works. Ran a real add-chart pass in a scaffolded PortalJS portal: npm install recharts@^2.15.0 succeeded and tsc --noEmit passed clean; the skill correctly gated the chart to one dataset's showcase while a from-scratch baseline rendered the chart on every dataset's page instead — exactly the bug the SKILL.md warns about.
What is the PortalJS Add Chart SkillProof Score?: 9.6/10 — installs cleanly 5/5, triggers reliably 5/5, output vs. baseline 9/10, docs & honesty 5/5.
How do I install PortalJS Add Chart?: Copy the install command from this page, run it in your terminal, and restart Claude Code. Skills live in ~/.claude/skills/ (global) or .claude/skills/ inside a project.
Can I use PortalJS Add Chart with Cursor, Copilot, Gemini CLI, Codex or other AI tools?: The SKILL.md format is native to Claude (Claude Code, Desktop, claude.ai). The instructions inside adapt to other assistants: Cursor rules, GitHub Copilot instructions, Windsurf rules, Custom GPTs, AGENTS.md for OpenAI Codex, and GEMINI.md for Google Gemini CLI — our conversion guides cover each, and the free converter on the tools page does the wrapping for you.