# Guide Index
Purpose: Provide the entry point for operational guidance and runbooks.
## Start here
- `AGENTS.md` for automated agent rules and tooling constraints.
- `docs/spec/index.md` for the normative system specifications and contracts.
- `docs/governance.md` for documentation structure, ownership, and update rules.
## Guide sections
### Development
- `docs/guide/development/languages/python.md` — Python environment and workflow.
- `docs/guide/development/languages/rust.md` — Rust development and style rules for this repository.
- `docs/guide/development/dependency_upgrade_workflow.md` — Dependency upgrade workflow for Rust dependencies.