infra/AGENTS.md

AGENTS.md

Ansible-driven personal infrastructure repo for Fedora and Void desktops, Linux Mint and FreeBSD transition targets, Linux workstations, WSL, and an Ubuntu server.

Source Of Truth

• Main orchestration: ansible/site.yml
• Inventory and layering inputs: ansible/inventory/hosts.yml, ansible/inventory/group_vars/*.yml, ansible/inventory/host_vars/*.yml
• Dotfiles live under dotfiles/
• AI agent instructions (bootstrap, rules, knowledge) are centralized in dotfiles/common/.config/ai/ and shared between OpenCode, Codex, and Gemini CLI.
• OpenCode loads its entrypoint configuration from dotfiles/common/.config/opencode/opencode.json.
• Codex config is rendered from dotfiles/common/.codex/config.toml.j2 so model_instructions_file points to the deployed ~/.config/ai/bootstrap.md.

Topology

• Current personal desktop: ikaros = platform_mint + role_personal_workstation + desktop_cinnamon
• Current laptop: nymph = platform_fedora + graphical_desktop + desktop_gnome
• Void desktop profile is also the base for other future/reference hosts via platform_void + graphical_desktop
• Native Linux workstation: deadalus-fedora
• WSL dev: deadalus-wsl
• Ubuntu server: prometheus
• Hosts intentionally belong to multiple groups; trust ansible/site.yml over hostname assumptions.
• Inventory axes are independent: platform_*, role_*, and desktop_*. Legacy void and desktop remain compatibility parents.

Working Rules

• Preserve layering all -> platform -> role -> desktop -> host.
• Keep ansible/site.yml small; orchestration belongs there, implementation belongs in roles.
• Prefer minimal, targeted edits. Preserve idempotency and existing ordering.
• All hosts use ansible_connection: local.
• Treat secrets/ as sensitive. Never print secret values.
• Tmux plugins are bootstrapped by TPM on the host; the repo only keeps tmux config and custom helper scripts.
• Read the relevant role tasks, templates, vars, and deployed dotfiles before editing.

Validation

• Default minimum:
  • ansible-playbook ansible/site.yml --syntax-check
• Repo-wide checks:
  • ansible-lint ansible/site.yml
  • ansible-lint ansible/roles
  • yamllint ansible/
• Host-focused dry runs:
  • Mint desktop work: ansible-playbook ansible/site.yml --limit ikaros --check --diff
  • Fedora laptop work: ansible-playbook ansible/site.yml --limit nymph --check --diff
  • Fedora workstation: ansible-playbook ansible/site.yml --limit deadalus-fedora --check --diff
  • WSL dev: ansible-playbook ansible/site.yml --limit deadalus-wsl --check --diff
  • Server: ansible-playbook ansible/site.yml --limit prometheus --check --diff
• Focused checks:
  • Emacs is disabled by default; temporary Emacs check: ansible-playbook ansible/site.yml --limit <host> --tags emacs --check --diff -e emacs_enabled=true
  • Mail bootstrap: sh -n scripts/bootstrap_mail.sh and shellcheck scripts/bootstrap_mail.sh
  • Server compose render: docker compose -f /opt/docker/server/docker-compose.yml config

Conventions

• Use FQCN Ansible modules.
• Prefer declarative modules over command/shell; when shell is required, make idempotency and failure behavior explicit.
• Start YAML files with ---, use 2-space indentation, and keep file modes quoted like "0644".
• Keep booleans as booleans and structured vars as YAML lists/maps.
• Put host-specific overrides in host_vars, not shared group_vars.
• Use no_log: true for secret-bearing task inputs or outputs.

Desktop Notes

• desktop_profile names independently selectable desktop groups such as desktop_gnome, desktop_hyprland, desktop_sway, desktop_niri, and desktop_cinnamon. Keep platform-specific session bootstrap in platform-specific roles.
• desktop_environment selects the mutually exclusive minimal (default), gnome, xfce, or kde desktop mode. profile_desktop_common owns shared Void bootstrap; the minimal mode uses profile_desktop_sway, profile_desktop_hyprland, and profile_desktop_niri, profile_desktop_xfce owns the reproducible XFCE setup, profile_desktop_kde owns KDE-specific defaults and cleanup, and profile_desktop_gnome copies shared desktop dotfiles for Fedora/GNOME without managing GNOME settings. desktop_sessions_enabled and desktop_default_session apply only to the minimal mode.
• Emacs packages and .emacs.d deploy are disabled by default via emacs_enabled: false; keep the dotfiles in the repo for reversible opt-in only.
• NTFS filesystem support is provided by ntfs-3g in ansible/inventory/group_vars/void.yml.
• Void user services are managed by turnstile and live under dotfiles/desktop/.config/service/.
• ssh-agent keeps the stable socket ~/.local/state/ssh-agent/socket.
• Critical session entrypoints:
  • dotfiles/desktop/.config/sway/config plus host.conf and session-env deployed via host_sway_dotfiles (sway / Wayland)
  • dotfiles/desktop/.config/hypr/hyprland.conf plus host.conf and session-env deployed via host_hyprland_dotfiles (Hyprland / Wayland)
  • dotfiles/desktop/.config/niri/config.kdl and session-env deployed via desktop_niri_dotfiles (Niri / Wayland)
• Void Niri lives in profile_desktop_niri, gated on 'niri' in desktop_sessions_enabled; it installs the emptty niri.desktop session, the /usr/local/bin/start-niri launcher, and the xdg-desktop-portal config, mirroring profile_desktop_sway.
• Fedora GNOME (desktop_gnome) assumes GNOME comes from the Fedora Workstation base install; Ansible only deploys shared desktop dotfiles and git/GPG config for nymph, not GNOME settings.
• FreeBSD Niri (dormant; platform_freebsd currently has no hosts) must keep FreeBSD-specific package, rc, DBus, seat, portal, and launcher behavior in profile_desktop_niri_freebsd or FreeBSD platform vars.
• Do not switch or restart a display manager during a playbook run from an active graphical session. Changing among emptty, LightDM, and SDDM requires an explicit run from another TTY/SSH session with desktop_allow_display_manager_switch=true. Apply managed XFCE XML while logged out of XFCE so xfconfd cannot overwrite it from its in-memory state.
• nymph is the Fedora/GNOME laptop target; keep GNOME settings unmanaged for now and add host-specific tuning only after real use.

Void Package And Dotfile Bucket Rules

platform_void is the reusable Void platform selection. The legacy void group remains a compatibility parent so existing group_vars/void.yml and when: "'void' in group_names" checks keep working during the transition. The Void desktop package lists in ansible/inventory/group_vars/void.yml are kept disjoint by role:

• void_packages_base — system runtime only (init/services, kernel, audio core, networking, filesystem, firewall, hardware daemons, runit logging).
• desktop_common_packages — GUI infrastructure shared by all desktop modes.
• desktop_minimal_packages / desktop_xfce_packages / desktop_kde_packages — mutually exclusive applications, integration components, and display managers. Packages required by more than one exclusive mode may be repeated; cleanup subtracts the selected mode before removing inactive packages.
• desktop_sway_packages / desktop_hyprland_packages — binaries specific to each session. Cross-WM packages used by both (such as dunst, rofi, and foot) are intentionally duplicated in the two lists. profile_packages in the same file is cross-distro and is overridden by group_vars/server.yml and the workstation group vars; do not move desktop-specific Void entries through it. The dotfile vars follow the same split: desktop_common_dotfiles carries mode-independent content, desktop_minimal_dotfiles carries Thunar, Udiskie, and minimal MIME defaults, and desktop_xfce_dotfiles carries XFCE state. KDE uses its own MIME defaults. desktop_void_dotfiles remains reserved for files that need the Void runtime.

Workstation Notes

• Native Linux workstation hosts can combine workstation_host_linux with an OS-specific dev group.
• deadalus-fedora keeps GNOME managed settings in ansible/inventory/host_vars/deadalus-fedora.yml.

Coding Agent Notes

• Shared agent packages live in ai_agents_npm_packages in ansible/inventory/group_vars/all.yml.
• Shared agent dotfiles live in ai_agents_dotfiles; rendered configs live in ai_agents_templates.
• Desktop, native workstation, and WSL profiles consume the shared agent package list; do not duplicate package entries in profile-specific vars.
• dotfiles_common copies common dotfiles plus ai_agents_dotfiles, then renders ai_agents_templates.
• Keep .config/ai/ as the common instruction source; update agent-specific entrypoints to reference it rather than duplicating instruction text.

Tooling Notes

• Install local tooling with:
  • python3 -m pip install ansible ansible-lint yamllint shellcheck-py
  • ansible-galaxy collection install -r ansible/collections/requirements.yml
• Required collections currently include ansible.posix and community.general.
• .yamllint treats line-length as a warning at 120 chars and disables document-start and comments-indentation.

When Updating Docs

• Keep README.md and AGENTS.md aligned when workflows materially change.
• If you add a new operational area, also add the narrowest validation command for it.
• Call out checks you could not run and any follow-up verification needed.