What do I need to use Rubric Builder?

The assignment / task; What matters most; Scale; Type.

Is Rubric Builder free to use?

Yes — run it free in the browser playground (no API key needed for the sponsored trial, or bring any provider key), or install it into Claude Code, Cursor, ChatGPT and more via npx pm-claude-skills. MIT-licensed and open source.

Rubric Builder

Q: How do I know the Rubric Builder output is good?

The skill verifies itself against its own quality checks: Descriptors are observable and specific (what the work shows), not vague labels; Levels are clearly distinguishable — the jump from one to the next is a real difference; Criteria are weighted and sum correctly to the total; Includes a student-facing version so the rubric guides, not just grades.

🔵 Stable🕐 updated 2026-06-21 🔷 SkillSpec L3 pm-education

Create a clear grading rubric with criteria and performance-level descriptors that make scoring fair, fast, and consistent. Use when asked to build a rubric, create grading criteria, design an assessment scoring guide, or make grading more objective. Produces an analytic rubric table (criteria × performance levels) with concrete, observable descriptors and a points scheme — plus a short version students can self-check against.

📚 Based on Analytic rubric design (Wiggins; Stevens & Levi)

▶ Run it free — no key needed 📝 Grade your existing draft View SKILL.md ↗

What to give it

▸The assignment / task — being graded and grade or level

▸What matters most — the criteria, or let the skill propose them

▸Scale — (e.g. 4-level: Exemplary/Proficient/Developing/Beginning) and total points

▸Type — analytic (per-criterion) or holistic (single overall judgment)

✅ The bar it holds itself to

Every skill in this library self-verifies — these are this skill's own quality checks, straight from its definition.

✓Descriptors are observable and specific (what the work shows), not vague labels

✓Levels are clearly distinguishable — the jump from one to the next is a real difference

✓Criteria are weighted and sum correctly to the total

✓Includes a student-facing version so the rubric guides, not just grades

⚠️ What it refuses to do

Descriptors that just add adjectives ("good" → "very good" → "excellent")

Overlapping levels a grader can't tell apart

Criteria that measure effort/length instead of the learning goal

A rubric only the teacher can read

Install

npx pm-claude-skills add --agent claude   # or codex · cursor · gemini · hermes
# or one-line MCP (every skill, any client):
claude mcp add pm-skills -- npx -y pm-claude-skills-mcp

Start with

Related skills

🔌 Embed this skill

Drop this on your blog, docs, or site — it renders a "Run this skill" card:

<div data-pm-skill="rubric-builder"></div>
<script src="https://mohitagw15856.github.io/pm-claude-skills/embed.js" async></script>

💬 Discussion

Rubric Builder is one of 599 open-source professional AI agent skills — all SkillSpec L3. Try them all in the browser · ⭐ Star on GitHub · Browse the full catalog