cd7658f452
- Updated AGENTS.md to specify one key per purpose for SSH access, including naming conventions and configuration tips. - Revised README.md to streamline the roadmap and link to SSH and secrets documentation. - Created docs/ssh-and-secrets.md to outline the strategy for managing SSH keys and secrets in a public repo. - Refined TODO.md to reflect the new approach for secrets and server configuration tasks.
39 lines
2.2 KiB
Markdown
39 lines
2.2 KiB
Markdown
# Agent Instructions
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## Nix/Darwin Rebuilds
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**IMPORTANT**: When making changes to Nix configuration files (e.g., `nixos/home/danny/home.nix`, `nixos/flake.nix`, etc.), **always ask the user to rebuild** before assuming packages are available.
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To rebuild:
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```bash
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cd ~/dotfiles/nixos
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darwin-rebuild switch --flake .
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```
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Do not automatically run rebuild commands - ask the user first.
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## Repo is public
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No keys, tokens, or identifying secrets in the repo. Prefer `scp` or config outside the repo.
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## SSH keys (one key per purpose)
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We use **one key per purpose**, not one per machine: separate keys for server access, GitHub, Forgejo (and other forges if needed). Benefits: limit blast radius if a key is compromised; clear revocation; clear which key is for what.
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- **Key names:** e.g. `id_ed25519_github`, `id_ed25519_forgejo`, `id_ed25519_servers` (Ed25519 preferred).
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- **Config:** Use `~/.ssh/config` with `IdentityFile` and `IdentitiesOnly yes` per host so the right key is used. Keys and sensitive config stay outside the repo.
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- **Server / NixOS:** Use actual key names on the machine (e.g. `id_ed25519_github`), not a generic `id_ed25519` (see Learnings below).
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## Learnings (NixOS server)
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- Minimal ISO: use Ethernet or the graphical installer (Wi‑Fi on minimal is fiddly).
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- Server hardware: stub in repo; user replaces with `nixos-generate-config --show-hardware-config` from the server.
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- Root password: console only; set danny’s password as root once for sudo.
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- SSH keys: use actual key names on the machine (e.g. `id_ed25519_github`), not assumed `id_ed25519`.
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## Server (nixos-server)
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- **Commit and push** before testing on the server; it clones/pulls from origin.
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- Bootstrap: server has no git until first rebuild. Use `nix run --extra-experimental-features "nix-command flakes" nixpkgs#git` to clone. Enable flakes in the daemon via `server-configuration-with-flakes.nix`: scp to server `/tmp/configuration.nix`, on server `sudo cp` to `/etc/nixos/configuration.nix`, then `sudo nixos-rebuild switch`. Then build flake and run `switch-to-configuration switch` (see nixos/readme.md).
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- Auto-rebuild timer (`dotfiles-rebuild`) only runs after the system has been switched to the flake config. Check with `systemctl is-active dotfiles-rebuild.timer` on the server.
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