Opus was ignoring the valid tag list and generating custom tags like
schema-enrichment-slug-mismatch, which fall through to 'unknown' in
disposition logic. All three prompts (domain, Leo standard, Leo deep)
now explicitly say "do not invent new tags" alongside the valid tag list.
Pentagon-Agent: Leo <294C3CA1-0205-4668-82FA-B984D54F48AD>