Adds GridProof — an MCP server for automated spacing/grid QA of frontends. Renders a running page with Playwright, measures computed geometry, returns structured violations + fix hints (spacing off-grid, off-scale arbitrary Tailwind values, inconsistent gaps, sub-44px tap targets). Three tools: gp_audit, gp_report, gp_check_element. MIT, on npm as `gridproof`. Placed in [category] — happy to move it if another fits better.
GreedProof