Three process learnings from the 2026-06-19 Ten31 mobile round-trip:
- Output read via the DesignSync MCP is a multi-file app on Claude Design's
own template runtime using CSS custom properties (incl. a dark/light
switch) — qualifies the seed note about "inline hardcoded CSS" (that's the
export-bundle path, not the MCP project-read path). Read the shell first,
then each sub-app's --var block + DCLogic for derived-field formulas.
- DesignSync reads into context only (no bulk download / no screenshots):
byte-capture the representative source + a manifest README; use
`jq -r .content` on the harness-persisted result for large files.
- A redesign can return more scope than the brief asked for (a light theme);
record it but write scope-expanding additions as proposed-not-canonical
pending an explicit owner decision, surfaced as an A/B reconcile question.
Keysat
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