infra/AGENTS.md

AGENTS.md

Guidance for coding agents working in this repository. Project type: Ansible-driven infrastructure, workstation/server provisioning, and user dotfiles.

Repository Map

• Entry playbook: ansible/site.yml
• Inventory: ansible/inventory/hosts.yml
• Group vars: ansible/inventory/group_vars/*.yml
• Host vars: ansible/inventory/host_vars/*.yml
• Shared templates: ansible/templates/**/*.j2
• Roles: ansible/roles/*
• Role assets: ansible/roles/*/{tasks,templates,files,handlers}/
• Dotfiles: dotfiles/
• Scripts: scripts/
• Secrets: secrets/

Topology And Orchestration

• Void desktops: ikaros, nymph
• Ubuntu workstation: deadalus
• Ubuntu server: prometheus
• Workstation topology now supports Linux host + Ubuntu dev and Windows 11 host + Ubuntu WSL dev as separate layers
• The WSL dev environment is intended to be managed by running Ansible locally from inside the distro, while the Windows host is managed remotely via PSRP and Windows package installs default to winget_psrp
• Most hosts use ansible_connection: local
• Current playbook layering: all:!workstation_host_windows -> dotfiles_common, void -> packages_void + services_runit + profile_desktop_common + profile_desktop_i3 + profile_desktop_sway + profile_desktop_hyprland + profile_desktop_host, workstation_dev_ubuntu -> packages_ubuntu + services_systemd + profile_workstation_dev_common, workstation_host_linux -> profile_workstation_gnome, workstation_dev_wsl -> packages_ubuntu + services_systemd + profile_workstation_dev_common + profile_workstation_dev_wsl, workstation_host_windows -> profile_workstation_host_windows, ubuntu_server -> packages_ubuntu + services_systemd + profile_server
• Present but currently unwired roles: base, dotfiles

Local Instruction Files

Checked when this file was updated:

• .cursorrules: not present
• .cursor/rules/: not present
• .github/copilot-instructions.md: not present If any of these files appear later, treat them as higher-priority repo-local instructions.

Working Principles

• Preserve the layering all -> OS -> profile -> host
• Prefer minimal, targeted edits over cleanup or refactors
• Preserve idempotency and reproducibility
• Validate on one limited host before broad rollout
• Treat secrets/ as sensitive; never print secret values
• Avoid editing vendored code under dotfiles/desktop/.tmux/plugins/ unless explicitly asked
• Keep ansible/site.yml small; orchestration belongs there, implementation belongs in roles
• Read the relevant inventory, vars, role tasks, templates, files, handlers, and dotfiles before editing

Build, Lint, And Test Commands

There is no compile/build pipeline. Confidence comes from syntax checks, dry runs, linting, and targeted shell validation.

Install tooling if needed:

python3 -m pip install ansible ansible-lint yamllint shellcheck-py
ansible-galaxy collection install -r ansible/collections/requirements.yml

Vault handling:

• secrets/vault.yml is the shared encrypted vars file
• secrets/vault.local.yml is an optional machine-local encrypted override file and should stay untracked
• secrets/.vault_pass is an optional local password file; if absent, Ansible falls back to an interactive prompt via scripts/vault_password_client.sh

Core validation from the repo root:

ansible-playbook ansible/site.yml --syntax-check
ansible-playbook ansible/site.yml --limit ikaros --check --diff
ansible-playbook ansible/site.yml --limit nymph --check --diff
ansible-playbook ansible/site.yml --limit deadalus --check --diff
ansible-playbook ansible/site.yml --limit deadalus-wsl --check --diff
ansible-playbook ansible/site.yml --limit prometheus --check --diff
ansible-lint ansible/site.yml
ansible-lint ansible/roles
yamllint ansible/

Useful execution commands:

ansible-playbook ansible/site.yml
ansible-playbook ansible/site.yml --limit ikaros
ansible-playbook ansible/site.yml --limit nymph
ansible-playbook ansible/site.yml --limit deadalus
ansible-playbook ansible/site.yml --limit deadalus-wsl
ansible-playbook ansible/site.yml --limit prometheus
scripts/bootstrap_mail.sh
pwsh -File scripts/bootstrap_windows_workstation.ps1

Single-Test Equivalents

Use the narrowest command matching the changed area.

• Playbook syntax only: ansible-playbook ansible/site.yml --syntax-check
• Single host dry run: ansible-playbook ansible/site.yml --limit <host> --check --diff
• Single host, selected tags: ansible-playbook ansible/site.yml --limit <host> --tags <tag1>,<tag2> --check --diff
• Single task restart point: ansible-playbook ansible/site.yml --limit <host> --start-at-task "<task name>" --check --diff
• Single role lint: ansible-lint ansible/roles/<role>
• Single YAML file lint: yamllint ansible/path/to/file.yml
• Waybar config validation: python3 -m json.tool dotfiles/desktop/.config/waybar/config-sway.jsonc >/dev/null and python3 -m json.tool dotfiles/desktop/.config/waybar/config-hyprland.jsonc >/dev/null
• Script syntax/lint: sh -n scripts/bootstrap_mail.sh and shellcheck scripts/bootstrap_mail.sh
• Windows bootstrap script parse check: pwsh -NoProfile -Command "[void][System.Management.Automation.Language.Parser]::ParseFile('scripts/bootstrap_windows_workstation.ps1', [ref]$null, [ref]$null)"

Code Style Guidelines

General

• Keep orchestration in playbooks and implementation in roles
• Prefer declarative modules over imperative shell commands
• Make state transitions explicit
• Avoid unrelated refactors in the same change
• Keep comments sparse and only for non-obvious behavior

YAML And Formatting

• Start YAML files with ---
• Use 2-space indentation; never use tabs
• Keep existing ordering stable when editing lists and maps
• Quote file modes as strings such as "0644", "0755", "0600", "0700"
• Avoid formatting-only churn in untouched sections

Modules, Imports, And Task Structure

• Use FQCN module names such as ansible.builtin.copy, ansible.builtin.template, ansible.windows.win_powershell, and community.general.xbps
• Prefer dedicated modules over ansible.builtin.command or ansible.builtin.shell
• Use command only when no module fits; use shell only when shell features are required
• When using command or shell, set changed_when and failed_when when defaults are misleading
• Prefer ansible.builtin.import_tasks for static task composition and include_tasks only for dynamic or conditional includes
• Keep task names imperative, descriptive, and stable enough for --start-at-task
• Tag tasks consistently with existing families such as packages, services, dotfiles, gnome, wsl, vscode, nvidia, and dotfiles:*
• Prefer loop with loop_control.label for multi-item tasks
• Use handlers for service restarts when configuration changes should trigger them

Variables, Types, And Naming

• Use snake_case for vars, facts, registered values, and custom facts
• Follow existing families such as common_packages, profile_packages, host_packages, desktop_common_packages, enabled_services, host_enabled_services, windows_winget_packages, and windows_vscode_extensions
• Keep booleans as booleans, not quoted strings
• Keep structured values as YAML lists/maps, not comma-separated strings
• Guard optional lists with default([]), mappings with default({}), and strings with default('')
• Build managed-user paths from {{ user_home }} where applicable
• Put host-specific overrides in host_vars, not shared group_vars

Templates, Dotfiles, And Shell

• Keep secrets parameterized through vars; never hardcode them in templates or dotfiles
• Prefer role templates/ for variable-driven config and role files/ for static payloads
• Preserve destination paths and permissions unless the task requires a change
• Dotfiles should stay deployable on real machines; avoid repo-only hacks in dotfiles/
• Keep dotfiles/desktop/.config/waybar/config-*.jsonc effectively valid JSON
• Prefer POSIX sh for simple scripts; use Bash only when needed
• Use set -eu in POSIX shell scripts unless there is a clear reason not to
• Quote variable expansions unless intentional splitting is required

Error Handling, Safety, And Idempotency

• Fail early with ansible.builtin.fail when prerequisites are missing
• Guard OS-specific, DE-specific, version-specific, and host-specific behavior with when
• Use no_log: true for passwords, tokens, private keys, and secret-bearing command results
• Use failed_when: false only for intentional probes
• Keep tasks non-interactive unless explicitly user-driven
• Avoid destructive changes in user homes unless clearly required
• For firewall changes, allow required access before enabling the firewall
• When running commands as the desktop user, set become_user and the required HOME or session environment explicitly

Area-Specific Notes

• profile_desktop_common manages shared Void desktop bootstrap, emptty, PAM hooks, dotfiles, mail bootstrap, and shared desktop tooling
• profile_desktop_i3 contains the X11/i3 session pieces
• profile_desktop_sway contains the wlroots/Sway session pieces and deploys shared Sway + Waybar dotfiles
• profile_desktop_hyprland contains the optional Hyprland/Wayland session pieces
• profile_desktop_host carries host-specific desktop overrides such as NVIDIA, PRIME wrappers, and host-only WirePlumber config
• profile_workstation_dev_common carries the Ubuntu dev layer shared by native workstation and WSL Ubuntu
• profile_workstation_gnome carries Linux host-only GNOME setup, extensions, and UFW
• profile_workstation_dev_wsl carries WSL-specific Ubuntu tweaks such as systemd and PSRP Python dependencies
• profile_workstation_host_windows manages the Windows 11 host via PSRP over HTTPS using negotiate by default, installs host applications via winget with a configurable windows_package_backend defaulting to winget_psrp, applies Windows shell tweaks, manages taskbar pins through a local Start layout policy with PinListPlacement="Replace", and sets Windows Terminal's default profile to Ubuntu
• deadalus-wsl is modeled as a local inventory target intended to be run from inside the Ubuntu WSL distro
• Windows taskbar pinning is driven by the ordered windows_taskbar_pins list in ansible/inventory/group_vars/workstation_host_windows.yml; validate identifiers from a real Windows session before changing that list
• Do not auto-restart emptty during playbook runs on active desktop hosts; prefer a manual restart from SSH or another TTY after the run
• dotfiles/desktop/.xinitrc affects X11 login behavior
• dotfiles/desktop/.local/bin/start-sway-session and start-hyprland-session are critical session bootstrap paths
• nymph has special NVIDIA/PRIME handling, host-specific WirePlumber camera config, host-specific Sway overrides, and deterministic workspace placement via kanshi

Validation Expectations Before Finishing

Default minimum:

ansible-playbook ansible/site.yml --syntax-check

Run a host-limited dry run whenever the change affects a real host profile, package set, service set, session, PAM stack, templates, or dotfiles.

For workstation changes, prefer:

ansible-playbook ansible/site.yml --limit deadalus --check --diff
ansible-playbook ansible/site.yml --limit deadalus-wsl --check --diff

If you touched scripts/bootstrap_mail.sh, also run:

sh -n scripts/bootstrap_mail.sh
shellcheck scripts/bootstrap_mail.sh

If you touched scripts/bootstrap_windows_workstation.ps1, also run:

pwsh -NoProfile -Command "[void][System.Management.Automation.Language.Parser]::ParseFile('scripts/bootstrap_windows_workstation.ps1', [ref]$null, [ref]$null)"

Agent Workflow Expectations

• Do not revert unrelated worktree changes made by the user
• Keep README.md and AGENTS.md aligned when workflows materially change
• If you add a new operational area, also add the validation command agents should run
• Prefer host-limited validation first: ikaros or nymph for Void desktop work, deadalus for Ubuntu workstation work, and prometheus for server work
• Call out checks you could not run and any follow-up verification needed