Two-part fix for the web-app chat path (both built-in and CLI mode go through
sub-agent JSONL output, not MCP tool calls — `jsonl-format.md` line 50 forbids
tool calls). Without this, every fill in generated designs was a hex literal
even after the 5/3 design-system-aware work — the 188 v1 element tools and
DEFAULT_PALETTE_FALLBACK were dead weight here.
A. STYLE GUIDE injection now uses ref + (hex) double form so the model sees
`$color-accent` paired with the resolved hex it represents:
Before: - Background: #FFF8F0 Surface: #FFFFFF
After: - Background: `$color-bg-deep` (resolves to #FFF8F0)
- Surface: `$color-surface` (#FFFFFF)
Applied to both `buildSubAgentStyleGuideInstruction` (selectedStyleGuideContent
path) and the inline `plan.styleGuide` injection in orchestrator-sub-agent.ts.
B. `seedDocVariablesFromStyleGuide` runs once before sub-agent execution: when
`doc.variables` is empty AND a style guide is selected, it maps the palette
to v1 token names (`color-bg-deep` / `color-accent` / etc) and seeds them
into `doc.variables`. This makes refs emitted by the model resolve to the
user's chosen palette at render time instead of falling back to the default
#2563EB blue.
A and B are coupled — A alone would make designs render in the wrong color
(every design becomes blue regardless of style guide); B alone leaves the model
mimicking the hex from the prompt. Both must ship together.
Also:
- jsonl-format.md: DESIGN SYSTEM TOKENS section + example fills converted to
refs + CRITICAL contract moved to top (so future budget overruns can't
truncate it). Budget bumped 1500 → 1700 for safety margin.
- elements.md: Theme handling section now flags MCP path vs JSONL path so
models on either path know which guidance applies.
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