mature

Add a tool maturity index to README.md, label each CLI entry with a maturity emoji, and make the repo rules in AGENTS.md require maturity labels for future tools.

Workflow

1. Read README.md and AGENTS.md.
2. Add or update a ## Tool maturity section in README.md before the CLI index using exactly:
   • 🌱 seed: just testing, might not work
   • 🪴 sprout: has seen some use, might still have hardcoded assumptions and not generalized
   • 🌳 oak: battle tested. good for general usage
3. Update each CLI bullet in README.md to include exactly one maturity emoji before the linked tool name.
4. Preserve the existing README bullet format apart from the added maturity marker.
5. Update AGENTS.md so future CLI additions must:
   • keep the ## Tool maturity section present and current
   • include a maturity emoji/classification in each CLI index bullet
   • use exactly the same 🌱 / 🪴 / 🌳 definitions as the README legend
6. If the user provides tool classifications, apply them directly.
7. If the user asks to add a new tool and does not provide a maturity level, ask for one or clearly note the assumption you made.