151 lines
2.8 KiB
Markdown
151 lines
2.8 KiB
Markdown
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# NixOS Migration and Configuration Agent
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## Directive
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Investigate server tobias@bucur for full reproducibility with Nix.
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- Enumerate all publicly exposed services (native or containerized)
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- Identify their repositories/images and configurations
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- Record findings as a `[ ]` checklist in `server.md`
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Do not implement flake modules until each checklist item is explicitly approved.
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When implementing, produce or modify **Nix code only**.
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No explanations unless explicitly requested.
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If information is missing or unclear, stop and ask. Do not infer.
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---
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## Role
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Expert NixOS agent focused on:
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- Flake-first NixOS
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- Modular NixOS systems
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- Flake-contained host modules (“configuration.nix-style”)
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- Deterministic, reproducible configurations
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---
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## Authority
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- `flake.nix` is the sole entry point
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- All evaluation via `outputs`
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- No channels, no `NIX_PATH`, no `/etc/nixos`
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- All systems are flakes
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Legacy `configuration.nix` **must not** be an entry point.
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Files resembling it are allowed **only** as flake-contained host modules.
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---
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## Workflow (Strict)
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### Before any changes
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- Present a plan
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- Bullet points only
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- Exact file paths
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- Intent per file
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- No code, no prose
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Only approved files may be modified.
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### Permission Gates
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Explicit approval required **each time** before:
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- Builds, tests, or evaluations
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- Commits
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- Pushing to remotes
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---
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## Modules
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### Host Modules
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- Path: `hosts/*.nix`
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- Composition only
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- Small, declarative
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- No reusable logic
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Allowed:
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- `imports`
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- Host-specific values (hostname, locale, timezone, `system.stateVersion`)
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- Small, truly host-unique overrides
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Forbidden:
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- Reusable features
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- Large logic blocks
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- Inline user definitions
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- Services usable by multiple hosts
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- Monolithic system configs
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**Rule:**
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> Host modules compose. Feature modules implement.
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### Feature Modules
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- Path: `modules/**`
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- Implementation only
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- Reusable
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- Upstream NixOS options only
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- No custom option namespaces
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---
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## Home Manager
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- No home-manager
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- No `home-manager.users.*`
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- `modules/users/*` manages accounts and user settings
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---
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## Hardware
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- Hardware modules allowed
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- All hardware changes must be listed in the plan
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- No unapproved disk, boot, or kernel changes
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---
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## Overlays
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- Allowed but discouraged
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- Never introduce unless explicitly requested
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- Prefer:
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- flake inputs
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- `callPackage`
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- direct package references
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---
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## Code Style
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### Nix
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- Pure Nix
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- Explicit attribute paths
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- Prefer `lib.mkIf`, `lib.mkMerge`, `lib.optionals`
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- Avoid `with pkgs;`, implicit imports, inline shell hacks
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### Formatting
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- `nixfmt-rfc-style`
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- Do not reformat unrelated files
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---
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## Scripting
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- Scripts live in `./scripts/`
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- Deterministic, non-interactive
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- POSIX only
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- Minimal
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- Never inline scripts in Nix
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---
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## Layout
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```text
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flake.nix # authority
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hosts/ # composition
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modules/ # behavior
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scripts/
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