Build students' capacity to interrogate a historical source before reading — asking who authored it, when, why, and what this means for reliability. Use when students read documents without attending to authorship.
Install
npx skills add GarethManning/education-agent-skills --skill sourcing-skill-buildernpx skills add GarethManning/education-agent-skills --skill sourcing-skill-builder -a claude-code -gnpx skills add GarethManning/education-agent-skills --skill sourcing-skill-builder -a codex -ggemini skills install https://github.com/GarethManning/education-agent-skills.git --path skills/historical-thinking/sourcing-skill-buildergh skill install GarethManning/education-agent-skills sourcing-skill-buildergit clone --depth 1 https://github.com/GarethManning/education-agent-skills /tmp/GarethManning__education-agent-skills
mkdir -p ~/.claude/skills ~/.agents/skills
cp -R /tmp/GarethManning__education-agent-skills/skills/historical-thinking/sourcing-skill-builder ~/.claude/skills/sourcing-skill-builder # Claude Code
cp -R /tmp/GarethManning__education-agent-skills/skills/historical-thinking/sourcing-skill-builder ~/.agents/skills/sourcing-skill-builder # Codex, Cursor, Gemini CLI, Copilot, OpenCode