chore: update AGENTS.md

AGENTS.md

@@ -1,35 +1,23 @@
 # Repository Guidelines
 
 ## Project Structure & Module Organization
-- `flake.nix` defines shared helpers plus Darwin (`macbook-pro`) and NixOS (`dev-vm`) hosts; `flake.lock` pins inputs.
-- `modules/darwin/` holds macOS system modules; `modules/nixos/` mirrors that for Linux (base `system.nix` imports `users.nix`, `network.nix`, `ssh.nix`, `containerization.nix`).
-- Host overlays live under `modules/nixos/hosts/`—e.g., `dev-vm.nix` adds virtio tooling and host-only packages.
-- User configuration is in `modules/home/rsydn/` with subdirectories for `programs/`, `shell/`, and `devtools/`; Darwin layers on `shell/nushell.nix` while Linux sticks to `shell/fish.nix`.
-- Secrets stay in `secrets/*.sops.yaml`; decrypted files appear under `~/.config/secrets/` at activation and must not be committed.
+This flake manages both macOS (`macbook-pro`) and NixOS (`dev-vm`) hosts. `flake.nix` collects shared modules while `flake.lock` pins inputs. Platform modules live in `modules/darwin/` and `modules/nixos/`; the Linux base `system.nix` pulls in `users.nix`, `network.nix`, `ssh.nix`, and `containerization.nix`. Host overlays such as `modules/nixos/hosts/dev-vm.nix` add virtio tooling or per-machine packages. User-facing configuration sits under `modules/home/rsydn/` with `programs/`, `shell/`, and `devtools/`; Darwin layers `shell/nushell.nix` and Linux sticks to `shell/fish.nix`. Secrets remain encrypted in `secrets/*.sops.yaml` and appear at runtime under `~/.config/secrets/`.
 
 ## Build, Test & Development Commands
-- `nix develop` – enter the flake dev shell with `git`, `nixfmt-classic`, SOPS/Age helpers.
-- `nix fmt` – format all Nix sources; run before commits touching modules or overlays.
-- `XDG_CACHE_HOME=$PWD/.cache nix flake check` – lint and eval every host without polluting the global cache.
-- `darwin-rebuild --dry-run --flake .#macbook-pro` / `darwin-rebuild switch --flake .#macbook-pro` – preview or apply macOS changes.
-- `nix build .#nixosConfigurations.dev-vm.config.system.build.toplevel` – make sure the Linux VM evaluates and builds before switching.
+- `nix develop` – enter the dev shell with `git`, `nixfmt-classic`, and SOPS tooling prewired.
+- `nix fmt` – format every Nix file; run before committing module or overlay changes.
+- `XDG_CACHE_HOME=$PWD/.cache nix flake check` – evaluate all hosts without polluting the global cache.
+- `darwin-rebuild --dry-run --flake .#macbook-pro` → `darwin-rebuild switch --flake .#macbook-pro` – preview then apply macOS updates.
+- `nix build .#nixosConfigurations.dev-vm.config.system.build.toplevel` – validate the Linux VM closure before switching.
 
 ## Coding Style & Naming Conventions
-- Use two-space indentation, trailing commas, and lower-kebab filenames (`shell/nushell.nix`).
-- Declare custom options under the `rsydn.*` namespace (e.g., `rsydn.containerization`, `rsydn.devTools`).
-- Prefer declarative package toggles and shared modules over ad-hoc host tweaks; keep host-specific overrides in `hosts/`.
+Use two-space indentation, trailing commas, and lower-kebab filenames (e.g. `shell/nushell.nix`). Declare custom options in the `rsydn.*` namespace and prefer shared modules over ad-hoc host tweaks.
 
 ## Testing Guidelines
-- Treat `nix flake check` as mandatory before PRs or `switch` operations.
-- Capture key activation output: `darwin-rebuild --dry-run` for macOS, `nix build .#nixosConfigurations.dev-vm…` for the VM, and attach summaries in reviews.
-- Co-locate regression tests with the option/module they guard using the `<option-name>.nix` pattern when practical.
+Treat `nix flake check` as mandatory gatekeeping. Capture activation output (`darwin-rebuild --dry-run`, `nix build .#nixosConfigurations.dev-vm…`) and attach summaries to reviews. Co-locate regression tests next to their modules with the `<option-name>.nix` pattern.
 
 ## Commit & Pull Request Guidelines
-- Write short, imperative subjects (`add dev-vm virtualization module`); keep each commit scoped to one change.
-- In PRs, list validation steps (`nix flake check`, host-specific builds) and link related issues or TODOs.
-- Provide screenshots or terminal snippets when altering shell prompts, Tailscale/SSH flows, or other UX-facing pieces.
+Keep commit subjects short and imperative (`add dev-vm virtualization module`) and scope each commit narrowly. PRs should list validation commands, link issues or TODOs, and include screenshots or terminal snippets when modifying prompts, Tailscale, or SSH flows.
 
 ## Security & Configuration Tips
-- Age keys live at `~/.config/sops/age/keys.txt`; regenerate via Home Manager if missing.
-- Access secrets by reading the managed files (`open ~/.config/secrets/openai-api-key | str trim`) and scope them with `with-env` instead of exporting globally.
-- Tailscale and OpenSSH run by default on Linux; rotate auth keys regularly and audit `services.tailscale.extraUpFlags` when enabling exit nodes.
+Age keys live at `~/.config/sops/age/keys.txt`; regenerate via Home Manager if missing. Read secrets from the managed files (`open ~/.config/secrets/openai-api-key | str trim`) and scope them with `with-env`. Tailscale and OpenSSH run by default on Linux; rotate keys regularly and audit `services.tailscale.extraUpFlags` before enabling exit nodes.

modules/home/rsydn/base.nix

@@ -33,6 +33,7 @@
       lazydocker
       lazygit
       lorri
+      nil
       pandoc
       ripgrep
       tmux