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feat: validate_html dry-run tool for Satori constraints#59
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Add a new stateless `validate_html` MCP tool that checks HTML/CSS against Satori's rendering constraints without rasterizing. Returns structured warnings (path + rule + message) in milliseconds, letting agents catch layout bugs before the slow render step. Rules: unsupported-position, no-style-block, multi-child-needs-flex, no-br-tag, text-needs-nowrap, unsupported-css-property.
# Conflicts: # mcp-server/README.md # mcp-server/src/server.js
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Summary
validate_htmlMCP tool that checks HTML/CSS against Satori's rendering constraints without rasterizing — returns structured warnings in millisecondsunsupported-position,no-style-block,multi-child-needs-flex,no-br-tag,text-needs-nowrap,unsupported-css-propertymcp-server/README.mdCloses backlog item #9.4.
Test plan