Auto-classify docs/lib/frontend/full so Bevy-only work skips the sim wall and docs work skips cargo. Serialize concurrent Rust gates with a portable mkdir lock. Run corpus/wiki/env in parallel; build the agent binary once instead of three cargo runs; drop the redundant post-clippy bevy builds. Wiki and corpus gates stay pure bash but avoid re-grepping SUMMARY per page and cache heading slugs. Defense: Implements the proportional-verification contract in wiki/process/workflows.md and AGENT.md — verification matches impact, and at most one Rust-heavy gate contends for the machine.