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Two tuning knobs that were leaving most of the host idle: 1) vitest.config.ts pool=threads with maxThreads ≈ cores/2. Default left this 64-core workstation at ~10% CPU during \`pnpm test:run\`. Threads pool uses the box: same 152-file/2050-test suite now runs at ~700% CPU instead of ~150%. Wall time gain is modest (workload is dominated by a handful of slow individual files that one thread must run serially), but the parallel headroom is there for when the suite grows. Cap = max(2, cores/2) keeps laptops reasonable; override with \`VITEST_MAX_THREADS=N\` in the env. 2) Dockerfile.mcpd uses BuildKit cache mounts on both pnpm install steps. Adds \`# syntax=docker/dockerfile:1.6\` and a \`--mount=type=cache,target=/root/.local/share/pnpm/store\` so pnpm's content-addressed store survives across image rebuilds. Cold rebuilds where the lockfile changed are unaffected; warm rebuilds where only source changed drop the install step from ~60s to <5s. fulldeploy.sh's mcpd image rebuild gets that back minus the docker push hash mismatch. Test parity: 2050/2050 across 152 files; per-package mcpd 837/837. Both unchanged. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>