Clarify how to visualize change over a time range before building a trend. Use whenever the user asks how much something changed, grew, dropped, improved, or regressed between two points or periods — "how much did X change from A to B", "before vs after", "start vs end", "week over week", "compare this month to last", "change over time" — or mentions a "slope chart" / "slopegraph".
Install
npx skills add PostHog/ai-plugin --skill choosing-trend-or-slope-viewnpx skills add PostHog/ai-plugin --skill choosing-trend-or-slope-view -a claude-code -gnpx skills add PostHog/ai-plugin --skill choosing-trend-or-slope-view -a codex -ggemini skills install https://github.com/PostHog/ai-plugin.git --path skills/choosing-trend-or-slope-viewgh skill install PostHog/ai-plugin choosing-trend-or-slope-viewgit 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/choosing-trend-or-slope-view ~/.claude/skills/choosing-trend-or-slope-view # Claude Code
cp -R /tmp/PostHog__ai-plugin/skills/choosing-trend-or-slope-view ~/.agents/skills/choosing-trend-or-slope-view # Codex, Cursor, Gemini CLI, Copilot, OpenCode