Flow-substrate and architecture knowledge now name WorkGrid as a current consumer and record save v12, while sim-mechanics carries the machine-token tuning constants. The local check gate skips Cargo work for docs/process-only dirty trees, with CI and clean checkouts still running the full Rust gate. Defense: DESIGN.md "What deserves to be a system" and the project workflow require honest Type: knowledge pages; stale save and flow-substrate claims poison future agent work. The check fast path preserves the full clean-tree gate while removing needless local Cargo work for non-Rust diffs.