# NixOS Development Guidelines (AI Agents)

Auto-generated from feature plans. Last updated: 2026-01-30

## Active Technologies
- Python 3.12 + MCP server library (Python, JSON-RPC/stdin transport), click for CLI entrypoint, pytest + coverage for tests, ruff/black for lint/format (002-mcp-server)
- None (in-memory tool definitions; filesystem access for repo interactions) (002-mcp-server)
- Nix (flakes; nixpkgs 25.11) + nixpkgs, flake-parts, sops-nix (003-vps-image-migration)
- N/A (configuration repo) (003-vps-image-migration)
- Nix (flakes; nixpkgs 25.11) + NixOS modules, sops-nix, nginx, wireguard, openssh, nftables (004-vps-migration)
- Files (configuration and secrets) (004-vps-migration)

- Documentation set (AI-facing constitution and playbooks) in Markdown (001-ai-docs)

## Project Structure

```text
docs/                    # Constitution and playbooks for AI guidance
specs/001-ai-docs/       # Planning artifacts (plan, research, tasks, data model, contracts)
```

## Commands

- Primary work is authoring markdown; no build/test commands required beyond manual validation.

## Code Style & Rules

- Follow repo conventions: no blank lines between code blocks; comments only when non-obvious; factor duplication into shared helpers/functions in examples.
- Constitution is authoritative for AI guidance; if human docs conflict, update both with the recorded resolution.
- Keep language business-level and technology-agnostic in AI-facing docs.

## Recent Changes
- 004-vps-migration: Added Nix (flakes; nixpkgs 25.11) + NixOS modules, sops-nix, nginx, wireguard, openssh, iptables
- 003-vps-image-migration: Added Nix (flakes; nixpkgs 25.11) + nixpkgs, flake-parts, sops-nix
- 003-vps-image-migration: Added [if applicable, e.g., PostgreSQL, CoreData, files or N/A]


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