vercel-composition-patterns

From the files and frontmatter at commit f44ddce. This is how much a skill can do, not whether it is risky.

Pattern check: 1 item to review · commit f44ddce · 29 Oct 2026

• R38 · HighName copied from another skill

  SKILL.md:2 (opens in a new tab)

  name: vercel-composition-patterns

We checked every text file in this skill, at commit f44ddce on 29 Oct 2026, against 45 published patterns such as download-and-run commands, hidden text and credential access. We don't run the skill, we don't read the web pages it points to, and we can't judge everything its instructions might lead an agent to do. In published tests, pattern checks like this one missed most malicious skills. Read the skill before you install it — especially anything it asks you to download or run.

How the check worksReport an incorrect finding

Each agent reads SKILL.md a little differently. We check the file against each one's published rules; we don't run the skill in any agent.

• Agent Skills specFails

  The open format from agentskills.io, held to what the strictest agents enforce, so one folder loads everywhere.

  • Error

    The name "vercel-composition-patterns" doesn't match its folder "composition-patterns". The spec requires them to match. N4

    Fix: Set name: composition-patterns, or rename the folder to vercel-composition-patterns.

  • Note

    Reference files that SKILL.md doesn't link: rules/_sections.md, rules/_template.md, rules/architecture-compound-components.md, rules/patterns-children-over-render-props.md, rules/patterns-explicit-variants.md and 3 more. Anthropic suggests linking every reference file directly from SKILL.md. B4

    Fix: Link each one from SKILL.md and say when to read it.

  • Note

    Reference files over 100 lines with no table of contents at the top: rules/architecture-avoid-boolean-props.md (101 lines), rules/architecture-compound-components.md (113 lines), rules/patterns-explicit-variants.md (101 lines), rules/state-context-interface.md (192 lines), rules/state-decouple-implementation.md (114 lines) and 1 more. B5

    Fix: Add a short list of the sections at the top of each.

• Claude CodePasses

  Claude Code reads its own extra fields, ignores unknown ones, and still loads a skill whose frontmatter is broken, without its fields.

  • Note

    The name "vercel-composition-patterns" doesn't match its folder "composition-patterns". Claude Code shows the skill as /vercel-composition-patterns, and the folder name also invokes it. N4

    Fix: Set name: composition-patterns, or rename the folder to vercel-composition-patterns.

  • Note

    Reference files that SKILL.md doesn't link: rules/_sections.md, rules/_template.md, rules/architecture-compound-components.md, rules/patterns-children-over-render-props.md, rules/patterns-explicit-variants.md and 3 more. Anthropic suggests linking every reference file directly from SKILL.md. B4

    Fix: Link each one from SKILL.md and say when to read it.

  • Note

    Reference files over 100 lines with no table of contents at the top: rules/architecture-avoid-boolean-props.md (101 lines), rules/architecture-compound-components.md (113 lines), rules/patterns-explicit-variants.md (101 lines), rules/state-context-interface.md (192 lines), rules/state-decouple-implementation.md (114 lines) and 1 more. B5

    Fix: Add a short list of the sections at the top of each.

• Claude apps & API uploadFails

  Uploading to claude.ai or the Claude API, or packaging with Anthropic's script, accepts only the six spec fields and stops on anything else.

  • Error

    The name "vercel-composition-patterns" doesn't match its folder "composition-patterns". claude.ai refuses an upload whose folder name doesn't match the skill name. N4

    Fix: Set name: composition-patterns, or rename the folder to vercel-composition-patterns.

  • Note

    The description is 310 characters. The claude.ai Help Center says 200 at most, though Anthropic's API docs and validator allow 1,024. D4

    Fix: If the claude.ai upload refuses it, trim the description to 200 characters.

  • Note

    Reference files that SKILL.md doesn't link: rules/_sections.md, rules/_template.md, rules/architecture-compound-components.md, rules/patterns-children-over-render-props.md, rules/patterns-explicit-variants.md and 3 more. Anthropic suggests linking every reference file directly from SKILL.md. B4

    Fix: Link each one from SKILL.md and say when to read it.

  • Note

    Reference files over 100 lines with no table of contents at the top: rules/architecture-avoid-boolean-props.md (101 lines), rules/architecture-compound-components.md (113 lines), rules/patterns-explicit-variants.md (101 lines), rules/state-context-interface.md (192 lines), rules/state-decouple-implementation.md (114 lines) and 1 more. B5

    Fix: Add a short list of the sections at the top of each.

• OpenAI (Codex & API)Passes with warnings

  Codex finds SKILL.md by its exact name and needs a description; OpenAI's Skills API checks the frontmatter against the spec and caps uploads.

  • Warning

    The name "vercel-composition-patterns" doesn't match its folder "composition-patterns". OpenAI's own upload example uses a differently named folder, but the spec it follows says they must match. N4

    Fix: Set name: composition-patterns, or rename the folder to vercel-composition-patterns.

• VS Code & CopilotPasses with warnings

  VS Code reads skills one folder below .github/skills, .claude/skills or .agents/skills and falls back to the folder name when the name is missing or differs; GitHub's Copilot docs require the exact name SKILL.md.

  • Warning

    The name "vercel-composition-patterns" doesn't match its folder "composition-patterns". VS Code uses the folder name, composition-patterns, instead. N4

    Fix: Set name: composition-patterns, or rename the folder to vercel-composition-patterns.

11 files