WHEN a step posts a message to Slack: how to set up an incoming webhook for one fixed channel, how to post to it, and what makes a post fail
Install
npx skills add krokodillus/cryogram --skill slacknpx skills add krokodillus/cryogram --skill slack -a claude-code -gnpx skills add krokodillus/cryogram --skill slack -a codex -ggemini skills install https://github.com/krokodillus/cryogram.git --path backend/agent/skills/connectors/slackgh skill install krokodillus/cryogram slackgit clone --depth 1 https://github.com/krokodillus/cryogram /tmp/krokodillus__cryogram
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/krokodillus__cryogram/backend/agent/skills/connectors/slack ~/.claude/skills/slack # Claude Code
cp -R /tmp/krokodillus__cryogram/backend/agent/skills/connectors/slack ~/.agents/skills/slack # Codex, Cursor, Gemini CLI, Copilot, OpenCode