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marble-builder

An AI agent skill from withmarbleapp/os-taxonomy, scored 63 out of 100 by code.

63/ 100C

Code score by group

  • Spec20/20
  • Description12/20
  • Procedure5/15
  • Done criteria4/15
  • Resources8/10
  • Scripts5/8
  • Safety7/7
  • Upkeep2/5

It loses the most points in Done criteria (11), the group that checks whether there is a checklist and a step that verifies the work.

What the author says it does

Design a learning experience for a child with the user, ground it in os-taxonomy and teaching research, then build and validate a standalone HTML experience. Use for creating or revising child-facing learning activities, rather than general curriculum lookup.

This is the description in the skill's own SKILL.md, written by its author, not by SkillCheatSheet.

Repository
withmarbleapp/os-taxonomy
Folder
.agents/skills/marble-builder
License
ODbL-1.0
GitHub stars
7,682
SKILL.md lines
278
Other files
123

Add marble-builder to your agent

npx skills add withmarbleapp/os-taxonomy --skill marble-builder

The command uses the open skills CLI. A skill is instructions and scripts your agent will follow, so read it first: open the folder on GitHub at the commit that was scored.

More skills from withmarbleapp/os-taxonomy

  1. taxonomy-curation

    Ingest official curriculum catalogues, align expectations with existing os-taxonomy topics, and review or refine primary-school mastery claims and coverage. Use for taxonomy maint…

    55C

All skills in withmarbleapp/os-taxonomy

Scores come from a snapshot of 300 public GitHub repositories taken on 12 November 2026. Every score is the result of fixed checks run by code; no AI is involved. How scoring works.