Explain a function, module, or codepath in layered detail (one-liner → architecture → implementation). Tailored to the user's stated background per ~/.claude/CLAUDE.md.
Append a dated entry to a personal engineering journal at ~/.claude/journal/YYYY-MM-DD.md. Use to capture decisions, observations, or reflections that aren't worth a commit message but shouldn't be lost.
Manage a personal cross-project todo list at ~/.claude/todo.md. Add, list, complete, or remove items. Persists across sessions and projects.
Verify that the Architect Coding Playbook install on this machine matches the shipped manifest. Re-hashes every shipped file, validates settings.json shape, reports drift (OK / drifted / missing / foreign). Use to confirm a clean install or to diagnose a broken one.