aiops: theme-build-skills - Build per-block styling in theme.json from the site and Figma skills #3995

Why

The rebuild skills produce tokens and presets for theme.json, but not the per-block styling under styles.blocks. That part is still filled in by hand. The block theme scaffold only ships a starter set, so each theme build has to fill out block styling itself.

What

Make sure these skills can build block styling in theme.json and fill it out:

• Site to Figma and JSON: site-to-design-tokens (aiops: site-tokens - Extract design tokens from an existing site for rebuilds #3990) and site-to-figma-components (aiops: site-components - Rebuild a live site's components, patterns and templates in Figma #3992).
• Figma to JSON: figma-to-block-theme (aiops: theme-build-skills - Consolidate the Figma and theme.json build skills into one skill #3989).

Start from the theme completer Zared built earlier: the themejson-completion skill and the themejson-completer agent. #3989 folded themejson-completion into the Complete mode of figma-to-block-theme. Check that this mode still does the job, and that the site skills hand it what it needs.

Done when

• Each skill either writes styles.blocks entries or hands off to the Complete mode, which does.
• Block styles use the semantic tokens in settings.custom.color and the presets, not raw values.
• Changes are additive: existing theme.json config is never overwritten.
• Tested on a real theme (TSP is the pilot), with the orphan scanner clean.

Not now

Logged on 5 Nov 2026 so it isn't forgotten. It isn't scheduled.