# GEMINI.md > **Single source of truth:** all project rules for AI assistants live in > [`AGENTS.md`](AGENTS.md). Read it in full before any change — it contains the 22 Hard Rules, > quality gates, code conventions, file-placement / repo-root hygiene rules, the repository map > and the local development access notes that used to live in this file. Gemini-specific notes: - Skills activate via the `activate_skill` tool (skill metadata is loaded at session start and the full content is activated on demand). - There are no other Gemini-only rules today. Do not re-add project rules here — edit `AGENTS.md` instead, so every assistant sees the same instructions.