lang-tutor

Add a new tutored language to lang-tutor. Walks every file you must touch — LanguageId, LANGUAGES record, language rail, runner (single-buffer) or PROJECT_CONFIG + scaffold (project workspace). Trigger when the user says "add a new language", "tutor X", or invokes /add-language.

Diagnose project workspace supervisor issues (tools/projects.mjs) — orphaned processes, readiness failures, build-phase regressions, log buffer drops, file watcher misbehavior, dotnet quiet output. Use when project-workspace Run/Stop/Reset misbehaves or processes accumulate across HMR reloads.