Documentation-only patch. Removes the Mirror Box dogfood track from the ready-suite. The aihxp/mirror-box repo has been archived; the canonical-dogfood section in SUITE.md is gone; per-skill dogfood/ folders are deleted.
Changed
- SUITE.md no longer carries the "Canonical dogfood target: Mirror Box" section. Byte-identical sync across all ten siblings.
- dogfood/ folder removed from this repo.
Why
The Mirror Box reference implementation required real infrastructure (Fastify + OTel + Fly.io + Honeycomb account) to fully exercise. The user wanted a skill suite, not a project that demands a particular hosted stack. Removing Mirror Box restores that posture: every skill stands on its own SKILL.md plus references; downstream consumers compose via the artifact contracts the skills describe, without depending on a shared hosted exemplar.
The interop standard is unchanged. Skills still produce .{skill}-ready/*.md artifacts; downstream siblings still read them. The contract holds without a canonical demo.