Make the recommended MCP profile visible from the first help and docs pass without changing 3.x behavior.
Rework help, top-level docs, public-contract wording, and shipped MCP/OpenAI examples so is the recommended first profile while stays the compatibility default for full-surface hosts.
Bump the package and catalog to 3.8.0, mark the roadmap milestone done, and add regression coverage for the new MCP help and docs alignment. Validation included uv lock, targeted profile/help tests, make check, make dist-check, and a real guest-backed server smoke.