Claude Code Configuration, Projects, Evaluation, and Multi-Agent Patterns

Configuration guidance now covers permission precedence, fail-closed policies, sandbox networking, plugin-install safeguards, resume behavior, omitClaudeMd, AGENTS.md fallback support, and lifecycle commands. New practical material adds slash-command scope and argument conventions plus a fragile multi-account CLAUDE_CONFIG_DIR and symlink workflow; progressive disclosure, drift scanning, verified commands, fail-silent hooks, and approval gates remain the strongest patterns.