Investigates a specific CI failure to a verdict: whose fault, which commit, who wrote it, and whether it's fixed. Use for "who broke master", "why did this test fail in CI", "is this failure my PR's fault or everyone's", "is this test flaky or actually broken", "when did this failure start".
Install
npx skills add PostHog/ai-plugin --skill investigating-ci-failuresnpx skills add PostHog/ai-plugin --skill investigating-ci-failures -a claude-code -gnpx skills add PostHog/ai-plugin --skill investigating-ci-failures -a codex -ggemini skills install https://github.com/PostHog/ai-plugin.git --path skills/investigating-ci-failuresgh skill install PostHog/ai-plugin investigating-ci-failuresgit clone --depth 1 https://github.com/PostHog/ai-plugin /tmp/PostHog__ai-plugin
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/PostHog__ai-plugin/skills/investigating-ci-failures ~/.claude/skills/investigating-ci-failures # Claude Code
cp -R /tmp/PostHog__ai-plugin/skills/investigating-ci-failures ~/.agents/skills/investigating-ci-failures # Codex, Cursor, Gemini CLI, Copilot, OpenCode