7. CUSTOMIZATION

Machine-local Configuration

Place machine-specific settings that should not be committed to git in:

~/.config/.user-dots/fish/local.fish

Typical uses: additional PATH entries, local aliases, hostname-specific env vars, work-specific tool configs.

Secrets and API Keys

~/.config/.user-dots/fish/secrets.fish

Store API tokens, GPG keys, private credentials here. This file is never committed.

Both files are sourced at the end of config.fish on every interactive session, so they can override anything set earlier.

Overriding Configuration Variables

Any variable set in local.fish after the main config loads takes effect. Example: to increase the scrollback history limit:

# in local.fish
set -gx SCROLLBACK_HISTORY_MAX_FILES 200

Fish Universal Variables

Some settings (fzf colors, theme) are stored in fish_variables via set -U. These are machine-local and git-ignored. Do not commit fish_variables.

Opinionated Components (Minimal Mode)

Every opinionated piece of this config is active by default but can be switched off through six category opt-out variables, each evaluated via __fish_variable_check. Set a variable to any falsy value (0, false, no, off, n) to disable its category; erase it or set a truthy value (1, true, yes, on, y) to re-enable. Unset means enabled.

Variable                        Disables
------------------------------  ------------------------------------
__fish_config_op_aliases        Command shadows and flag injection:
                                ls->eza, cat->bat, cd->zoxide,
                                rm->trash, less->ov, top->btop,
                                ping->prettyping, ssh->kitten,
                                du->duf/dust, mkdir/bash wrappers,
                                history timestamps, grep/cp/mv/wget
                                flag injection, help intercept
__fish_config_op_autoexec       Startup side-effects: Fisher
                                bootstrap, theme apply, paru/yay
                                wrapper generation, auto venv
                                activation, WakaTime hook
__fish_config_op_overrides      Key and env overrides: Vi mode,
                                exit->smart_exit, PAGER/MANPAGER,
                                CDPATH, bang-bang system, autopair,
                                puffer, starship prompt, theme
                                colors, FZF_DEFAULT_OPTS, right
                                prompt
__fish_config_op_integrations   Terminal/tool coupling: Kitty/
                                WezTerm window abbreviations, done
                                notifications, spwin/tab/split,
                                hist, logs, upgrade, WakaTime
__fish_config_op_logging        Logging & capture: scrollback
                                capture on exit, paru/yay AUR log
                                wrappers, Kitty watcher capture;
                                sentinel file coordinates
                                cross-process state
__fish_config_op_greeting       Greeting & first-run UI: per-session
                                fish_greeting override (defines empty
                                function late in config.fish to
                                suppress distro greetings such as
                                CachyOS fastfetch); first-run welcome
                                banner in conf.d/first_run.fish

Examples:

# Disable command shadows only (rm becomes plain rm again):
set -U __fish_config_op_aliases off

# Full minimal mode — disable all six categories at once:
set -U __fish_config_opinionated 0

# Re-enable everything:
set -Ue __fish_config_opinionated

Notes:

Command shadows (rm, cat, ls, ...) react immediately; conf.d-level components (bindings, prompt, abbreviations, hooks) take effect in new shells.
With aliases disabled, rm falls back to bare command rm — files are deleted permanently, not trashed.
Disabled integration commands (spwin, tab, split, hist, logs, upgrade) print an error naming the variable that disabled them.
On CachyOS, the distro fish config's own aliases, history override, and bang-bang bindings are stripped per category as well.

Prompt and Theme

Starship

The primary prompt is Starship, initialized by conf.d/starship.fish. Configure it via ~/.config/starship.toml.

conf.d/starship.fish defines a fish_prompt wrapper that only activates when starship is in PATH. It emits OSC 133;A (prompt start) immediately before Starship renders and OSC 133;B (input start) immediately after, placing both markers on the prompt line itself. This allows ov to use them as sticky section headers when browsing scrollback logs. Without Starship, fish's built-in prompt handles these markers automatically.

FZF

FZF is themed to Catppuccin Mocha via FZF_DEFAULT_OPTS set in integrations/fzf.fish. The colors applied:

Background:   #1E1E2E (base)    #313244 (surface0)
Foreground:   #CDD6F4 (text)
Highlights:   #F38BA8 (red)     #CBA6F7 (mauve)    #B4BEFE (lavender)

To customize, override FZF_DEFAULT_OPTS in local.fish.

Catppuccin Mocha Syntax Highlighting

The Catppuccin Mocha theme ships with this config in themes/ and is applied on first run via conf.d/first_run.fish. Colors are stored in fish_variables (universal). To switch variants, install a different theme from themes/:

fish_config theme save "Catppuccin Latte"

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