Part of #430.

Superpowers-style skills that teach coding agents how to read and produce scope42 items in any workspace. Distribution: start in-repo under skills/, publish as a plugin later. Skills must be format- and layout-agnostic — they always read scope42.yaml before writing anything.

Tasks

• Meta skill scope42-using: orients agents on when to reach for type-specific skills and how to read the workspace config
• Skill scope42-recording-issue: triggered when the user describes an architectural problem; creates a new issue file under the configured issues path, with frontmatter stub and suggested body outline
• Skill scope42-recording-risk: same pattern, includes status (potential vs current)
• Skill scope42-proposing-improvement: requires linking to at least one issue or risk via resolves
• Skill scope42-making-decision: guides ADR body structure (context, drivers, options with pros/cons, outcome) as free text
• Skill scope42-reviewing-workspace: summarizes workspace state (counts, open items, orphans) by invoking @scope42/lint
• Smoke tests: for each skill, a fixture workspace + expected diff