v0.0.16

What's Changed

• Add /marimo-retro-pair skill by @mscolnick in #40
• Refocus marimo-pair on notebook semantics by @manzt in #51
• Surface PEP 723 sandbox requirement in skill docs by @manzt in #52
• Mention hide_code parameter by @nojaf in #54
• Document name-redefinition and setup-cell constraints by @manzt in #55
• Add Codex plugin marketplace support by @manzt in #59

Full Changelog: v0.0.15...v0.0.16