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Sandbox Composer

Target-profile-driven component composition. Enumerates the active playground's real component library at runtime, reads each component's props before use, and fills scaffolded scene files with typed JSX, defense-realistic demo data, and any verbatim PRFAQ copy — flagging gaps instead of inventing phantom imports. Swappable via ${CLAUDE_PLUGIN_ROOT}/config/prototype-targets.json.

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SKILL.md
Quality
Evals
Security

Quality

Validation

87%

Checks the skill against the spec for correct structure and formatting. All validation checks must pass before discovery and implementation can be scored.

Validation — 14 / 16 Passed

Validation for skill structure

CriteriaDescriptionResult

name_field

Must contain only lowercase letters, numbers, and hyphens

Fail

frontmatter_unknown_keys

Unknown frontmatter key(s) found; consider removing or moving to metadata

Warning

Total

14

/

16

Failed

Repository
mattermost/mattermost-ai-marketplace
Reviewed

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