pnpm occasionally detects an incompatible node_modules directory (e.g.
after a store location or pnpm major version change) and interactively
asks whether to remove and recreate it, blocking the MCP bootstrap in
the devenv tmux pane. Set confirmModulesPurge: false in
mcp/pnpm-workspace.yaml so the purge is auto-confirmed; this file is
included in the npm pack tarball (unlike .npmrc) and applies to all
install invocations from a single place.
AI-assisted-by: claude-fable-5