Shared Shell Environment, this file is read by all three shell - fish, zsh & bash

.shell_env

# ╔══════════════════════════════════════════════════════════════════╗
# ║                    Shared Shell Environment                     ║
# ║                    Single Source of Truth                        ║
# ╚══════════════════════════════════════════════════════════════════╝
#
# This file is read by all three shell configs on this Mac:
#   - ~/.config/fish/config.fish  (fish)
#   - ~/.zshrc                    (zsh)
#   - ~/.bashrc                   (bash)
#
# Each shell has its own reader that parses this file on startup.
# Shell-specific settings (version manager inits, completions, plugins)
# live in their respective config files, NOT here.
#
# ── Syntax ──────────────────────────────────────────────────────────
#
#   PATH_ADD=<dir>       Prepends <dir> to $PATH (duplicates are
#                        handled gracefully by each shell's reader).
#
#   ALIAS=<name>=<cmd>   Creates a shell alias. The first '=' after
#                        ALIAS separates the directive, the second '='
#                        separates the alias name from its command.
#                        Example: ALIAS=ll=ls -l
#
#   KEY=value            Sets an environment variable.
#                        Example: LC_ALL=en_US.UTF-8
#
#   # comment            Lines starting with '#' are ignored.
#   (blank line)         Blank lines are ignored.
#
# ── Variable expansion ──────────────────────────────────────────────
#
#   $HOME is the only variable expanded — each shell's reader replaces
#   it with the actual home directory at parse time.
#   Use ~ in alias commands (expanded at runtime when the alias runs).
#
# ── How to add new entries ──────────────────────────────────────────
#
#   1. PATH:   PATH_ADD=/opt/homebrew/opt/newtools/bin
#   2. ENV:    MY_VAR=some_value
#   3. ALIAS:  ALIAS=shortcut=cd ~/some/directory
#
#   Changes take effect in new shell sessions (open a new terminal tab
#   or run: exec fish / exec zsh / exec bash).
# ────────────────────────────────────────────────────────────────────

# ── Locale ──
LC_ALL=en_US.UTF-8
LANG=en_US.UTF-8

# ── pyenv ──
PYENV_ROOT=$HOME/.pyenv
PATH_ADD=$HOME/.pyenv/bin

# ── nvm ──
NVM_DIR=$HOME/.nvm

# ── Google Cloud SDK ──
CLOUDSDK_PYTHON=$HOME/.pyenv/versions/3.12.12/bin/python3.12

# ── PATH ──

# Local binaries (claude CLI, pipx, etc.)
PATH_ADD=$HOME/.local/bin

# JetBrains Toolbox
PATH_ADD=$HOME/Library/Application Support/JetBrains/Toolbox/scripts

# ── Aliases ──
ALIAS=ll=ls -l
ALIAS=..=cd ..
ALIAS=please=sudo
ALIAS=now=date +%T
ALIAS=cl=curl -L
ALIAS=clean=rm -rf ~/Library/Developer/Xcode/DerivedData/
ALIAS=fast=bundle exec fastlane
ALIAS=stree=open /Applications/Sourcetree.app/ .