Build safety nets BEFORE refactoring — characterization tests capturing current behavior, boundary markers, config freeze, rollback tags. MUST run before surgeon.
How to install safeguard?
rune-kit/rune/safeguard
$curl -o .claude/agents/safeguard.md https://raw.githubusercontent.com/rune-kit/rune/HEAD/agents/safeguard.mdInstalls into the current project.
›Prefer a prompt? Paste this to your agent
Install safeguard by running `curl -o .claude/agents/safeguard.md https://raw.githubusercontent.com/rune-kit/rune/HEAD/agents/safeguard.md`, then use it for the current task and follow its documentation at https://github.com/rune-kit/rune.
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