Haiku as QA canary — fresh-eyes mechanical execution surfaces validator and CLI failure modes

When you need to verify a new guard, skill, or CLI actually works, delegate the mechanical execution to Haiku. Haiku does not preemptively work around rules, so validator UX gaps, escape-char handling bugs, --id quirks, silent-fail patterns, and other real failure modes surface immediately. Pairs naturally with opus-files-bugs-on-sight: every Haiku canary run that exposes a quirk should be filed as a wkappbot suggest BUG in the same turn.

Steps