New root ARCHITECTURE.md: descriptive, pointer-first map of boot/launch, interp/thread topology, console abstraction, module loading, build/provenance/kits and the test harness - own lane beside DOX (what you must do) and the goals system (what changed and why). In-flux subsystems documented as goal pointers only.
scriptlib/developer/architecture_lint.tcl validates the doc's reference contract: backticked repo paths exist, G-<id> references resolve against both goal indexes, 400-line size budget. Plain tclsh, no deps, mutation-tested.
Root AGENTS.md: Child DOX Index entry, Closeout item 5 (update-or-prune described mechanisms + run the linter), scriptlib/developer inventory.
Assisted-by: harness=opencode; primary-model=openrouter/moonshotai/kimi-k3; api-location=openrouter.ai
Julian Noble