Verification discipline for completion claims. Use when about to assert success, claim a fix is complete, report tests passing, or before commits and PRs. Enforces evidence-first workflow.
Install
npx skills add CodingCossack/agent-skills-library --skill verification-before-completionnpx skills add CodingCossack/agent-skills-library --skill verification-before-completion -a claude-code -gnpx skills add CodingCossack/agent-skills-library --skill verification-before-completion -a codex -ggemini skills install https://github.com/CodingCossack/agent-skills-library.git --path skills/verification-before-completiongh skill install CodingCossack/agent-skills-library verification-before-completiongit clone --depth 1 https://github.com/CodingCossack/agent-skills-library /tmp/CodingCossack__agent-skills-library
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/CodingCossack__agent-skills-library/skills/verification-before-completion ~/.claude/skills/verification-before-completion # Claude Code
cp -R /tmp/CodingCossack__agent-skills-library/skills/verification-before-completion ~/.agents/skills/verification-before-completion # Codex, Cursor, Gemini CLI, Copilot, OpenCode