Claude Code skill

With the cntrdct binary on PATH, Claude Code users can invoke /cntrdct to run a scan and have the top findings summarised in chat. The skill definition lives under .claude/skills/cntrdct/ in the repo.

The skill is purely a thin wrapper around the same cntrdct scan pipeline a CLI user would invoke. It does not enable adjudication by default; pass --adjudicate explicitly if an ANTHROPIC_API_KEY is present in the shell environment Claude Code inherits.