# millerson.name Nix Overlay

A custom Nix overlay and flake providing additional packages not found in upstream nixpkgs, built using [numtide/blueprint](https://github.com/numtide/blueprint) for streamlined flake development.

## Features

- **Custom packages** - Additional software packaged for Nix
- **Two overlay strategies** - Choose between binary-cache-friendly or dependency-sharing overlays
- **Blueprint-based** - Uses modern Nix flake patterns with `numtide/blueprint`

## Available Packages

| Package | Description | Category |
|---------|-------------|----------|
| `aionui` | Free, open-source, Cowork app with AI Agents | AI Coding Agents |
| `container-use` | Containerized environments for coding agents | AI Coding Agents |
| `desloppify` | Multi-language codebase health scanner and technical debt tracker for AI agents | AI Coding Agents |
| `ds4` | DeepSeek 4 Flash and PRO local inference engine for ROCm (Strix Halo) | AI Inference |
| `freebuff` | The world's strongest free coding agent | AI Coding Agents |
| `graphify` | Turn any folder of code, docs, papers, images, or videos into a queryable knowledge graph | AI Coding Agents |
| `hipengine` | ROCm-native local LLM inference engine with torch-free runtime for AMD RDNA GPUs | AI Inference |
| `mcp-gateway` | Universal Model Context Protocol gateway that sits between AI client and MCP tools/servers | MCP Servers |
| `nftables-analyzer` | Analyze nftables firewall rules and evaluate traffic queries | Networking |
| `nftablesbuilder` | Web interface to manage nftables rules with drag-and-drop rule creation | Networking |
| `skillsmcp` | MCP server that exposes Agent Skills to AI agents via the Model Context Protocol | MCP Servers |
| `kubernetes-mcp-server` | Model Context Protocol (MCP) server for Kubernetes and OpenShift | MCP Servers |
| `loop` | Corporate messenger for your team | Communication |
| `radar` | Modern Kubernetes visibility — topology, event timeline, service traffic, resource browsing, Helm management, and GitOps support | Kubernetes |
| `omniroute` | Unified AI router with 160+ providers, auto fallback, MCP/A2A, OpenAI-compatible APIs | AI LLM Gateway |
| `relay-free-llm` | RESTful API to route user prompts to various AI model providers with automatic failover and intent-based routing | AI LLM Gateway |
| `stakpak` | DevOps AI agent that generates infrastructure code, debugs Kubernetes, configures CI/CD, and automates deployments | AI Agents |
| `traycer` | Open-source AI orchestration app for agentic coding | AI Coding Agents |

## Usage

### As a Flake

Add to your `flake.nix` inputs:

```nix
inputs.millerson-nix-overlay.url = "git+https://git.millerson.name/alex/millerson-overlay.nix.git";
```

Then use in your outputs:

```nix
outputs = { nixpkgs, millerson-nix-overlay, ... }: {
  nixosConfigurations.your-host = nixpkgs.lib.nixosSystem {
    system = "x86_64-linux";
    modules = [
      millerson-nix-overlay.nixosModules.default
      # ... your other modules
    ];
  };
};
```

### As an Overlay

#### Option 1: Default Overlay (Binary Cache Friendly)

Uses the packages built against this flake's nixpkgs revision. Binary cache hits work best when using the same nixpkgs revision.

```nix
nixpkgs.overlays = [ millerson-nix-overlay.overlays.default ];
```

#### Option 2: Shared Nixpkgs Overlay (Dependency Sharing)

Builds packages against your system's nixpkgs, sharing dependencies with the rest of your system. No second nixpkgs evaluation, but binary cache only hits when your nixpkgs revision matches ours.

```nix
nixpkgs.overlays = [ millerson-nix-overlay.overlays.shared-nixpkgs ];
```

### Installing Packages

With flakes enabled:

```bash
# Try a package
nix run git+https://git.millerson.name/alex/millerson-overlay.nix.git#mcp-gateway

# Install permanently
nix profile install git+https://git.millerson.name/alex/millerson-overlay.nix.git#mcp-gateway
```

### nftablesbuilder Runtime Notes

`nftablesbuilder` is a web interface for managing nftables. It consists of a
root-launcher (`nftablesbuilder`) that spawns the unprivileged `webserver`
binary and pipes encrypted commands between it and the `nft` binary.

Before running it you must:

1. Copy the settings template to `/etc/nftablesbuilder` (the only fixed path):
   ```bash
   nix build .#nftablesbuilder
   cp result/share/nftablesbuilder/settings.example /etc/nftablesbuilder
   ```
   Adjust paths inside (html, webserver, nft, savepath, TLS files).
2. Create a TLS key/certificate pair at the paths referenced by
   `tlskey`/`tlscert` (e.g. `openssl req -x509 -newkey rsa:2048 -nodes ...`).
3. Run the launcher as root (it needs to write `/etc/nftables.conf` and run
   `nft`); the web interface listens on `https://<server>:1969`.

Note: upstream publishes the GUI only as a prebuilt tarball on
nftablesbuilder.eu (served with a self-signed certificate, hence the
`curlOpts = "-k"` in the derivation); the source repository is missing the
`settings` crate, which this overlay patches in.


## Development

### Prerequisites

- Nix with flakes enabled
- [treefmt-nix](https://github.com/numtide/treefmt-nix) for formatting (optional)

### Building Packages

```bash
# Build all packages for current system
nix build .#packages

# Build specific package
nix build .#mcp-gateway

# Enter development shell
nix develop
```

### Project Structure

```
nix-overlay/
├── flake.nix                    # Flake definition
├── treefmt.toml                 # Code formatting configuration (nixfmt)
├── overlays/                    # Overlay implementations
│   ├── default.nix             # Binary-cache-friendly overlay
│   └── shared-nixpkgs.nix      # Dependency-sharing overlay
├── packages/                    # Package definitions
│   ├── aionui/                 # AionUi - AI Cowork desktop app
│   ├── container-use/          # Containerized environments for coding agents
│   ├── default/                # Meta-package listing all packages
│   ├── desloppify/             # Codebase health scanner for AI agents
│   ├── ds4/                    # DeepSeek V4 Flash/PRO inference engine (ROCm)
│   ├── flake-inputs/           # Utility for caching flake inputs
│   ├── freebuff/               # Free coding agent (Codebuff)
│   ├── graphify/               # Knowledge graph generator for code folders
│   ├── hipengine/              # ROCm-native LLM inference engine for AMD GPUs
│   ├── kubernetes-mcp-server/  # MCP server for Kubernetes and OpenShift
│   ├── loop/                   # Corporate messenger for your team
│   ├── mcp-gateway/            # MCP protocol gateway
│   ├── omniroute/              # Unified AI router with 160+ providers
│   ├── radar/                  # Kubernetes UI (topology, timeline, Helm, GitOps)
│   ├── relay-free-llm/        # AI model provider routing gateway
│   ├── skillsmcp/              # MCP server for Agent Skills
│   ├── stakpak/                # DevOps AI agent for infrastructure automation
│   └── traycer/                 # AI orchestration desktop app (agentic coding)
└── README.md
```

### Adding New Packages

1. Create a new directory under `packages/<package-name>/`
2. Add a `package.nix` with the package definition
3. Create a `default.nix` that imports `package.nix` with proper arguments
4. The package will be automatically picked up by blueprint

Example structure:

```
packages/my-package/
├── default.nix    # Import wrapper
└── package.nix    # Actual package definition
```

## License

See [LICENSE](LICENSE) file for details.

## Contributing

Contributions are welcome! Please feel free to submit a Pull Request.