Brand Guideline Specify Route

Bug 2 fix (2026-08-06): confirmed live, the MCP schema had no field for structured negative constraints at all -- a brief that says "not a generic pink pet salon" in prose had no way to make that a real, testable exclusion; the closest the system could do was infer sentiment from prose (fixed separately, see RELEVANCE_NEGATION_CUES), which is inherently weaker than a structured field a caller can rely on. avoid_concepts are checked as case-insensitive substring matches against each retrieved archive entry's own name/colour_notes/ archive_source text during concept-mode retrieval (resolve_palette colours) -- structured constraints, not inferred sentiment, and they take precedence: an avoid_concepts match is excluded outright, regardless of what the brief's prose might otherwise suggest. preferred_families is a soft ranking boost, not a hard filter -- matching entries are preferred, not the only ones allowed.