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Card Schema

Category: General  ·  Sub-category: automation  ·  Last updated:
Card schema reference — required/optional fields, status/stage/contribution/human_gate enums, canonical tags with predicates, DoD detection, relationship invariants, title naming convention. AUTO-INVOKE when other deck skills need schema context, or when user asks about field semantics, status lifecycle, DoD format, canonical tags, decision-gate body contract, or how to title a card. XP system metaphor — shared vocabulary makes the deck a contract, not a chat thread.

From the source SKILL.md

XP's system metaphor (Beck, 1999): a shared vocabulary that lets humans and agents collaborate without re-deriving terms each conversation. Names mean the same thing across every commit, every sub-agent, every /loop iteration. The schema is what makes the deck a contract instead of a chat thread — every field has a defined semantics, a defined enum, and a validator that refuses unknown values. Without that contract, frontmatter rots into ad-hoc prose and the deck loses its read-pattern guarantee.

What this skill does

Card Schema is a community-contributed Claude Code skill in the automation sub-category. It ships as a SKILL.md file that Claude Code auto-discovers under ~/.claude/skills/card-schema/ and loads when your prompt matches the skill's trigger.

Who uses this skill

The Card Schema Claude Code skill is built for Claude Code users and developers across all disciplines looking for general-purpose AI assistance. It's part of ClaudSkills (also referred to as Claude Skills or Claude Code Skills) — the open community-curated registry of 70,000+ SKILL.md files for Anthropic's Claude Code agent and the wider Claude ecosystem (Claude API, Claude Agent SDK).

How to install

Free

Manual install (2 steps)

mkdir -p ~/.claude/skills/card-schema
curl -L https://claudskills.com/skills/card-schema/SKILL.md \
  -o ~/.claude/skills/card-schema/SKILL.md

Or just download SKILL.md directly and drop it into ~/.claude/skills/card-schema/. Claude Code auto-discovers it on next session.

Skills live at ~/.claude/skills/card-schema/SKILL.md on macOS/Linux, or %USERPROFILE%\.claude\skills\card-schema\SKILL.md on Windows. See the full install guide for step-by-step instructions.

Pro

One-click install via the desktop app

The ClaudSkills desktop app installs any skill directly into ~/.claude/skills/ with one click — no terminal required. Pro starts at $9/mo or $149 lifetime.

Pro

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See pricing → Download desktop app

Cite this skill

If you reference this skill in a blog post, paper, or documentation, you can cite it as:

APA
ClaudSkills. (2026). Card Schema [Claude Code skill]. ClaudSkills. https://claudskills.com/skills/card-schema/
BibTeX
@misc{card-schema-2026,
  author    = {ClaudSkills},
  title     = {Card Schema [Claude Code skill]},
  year      = {2026},
  publisher = {ClaudSkills},
  url       = {https://claudskills.com/skills/card-schema/}
}

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Part of ClaudSkills — the open registry for Claude Skills & Claude Code Skills.  ·  What's New  ·  Install guide  ·  About  ·  llms.txt

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