Closes #3.
--theme CSSon all three ask scripts: a stylesheet layered over the web UI's design tokens (--color-*,--radius-*, light and dark), served at/api/v1/theme.css. Probed like--timeout— older engines note it on stderr and continue unthemed.- SKILL.md documents theming for real: the actual flag and token names, schemaui's
examples/themes/midnight.cssas the copy-me example, external design-system mapping (one commented rule per token), and--frontend DIR+ the REST contract for fully custom frontends. - Tests: unit coverage for the flag/capability interaction and an e2e asserting the themed stylesheet is served verbatim; suite at 31 passed, 3 skipped.