feat: migrate to devbox and chezmoi

Author: takymt

.chezmoi.yaml.tmpl

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+{{- $osID := .chezmoi.os -}}
+{{- if hasKey .chezmoi.osRelease "id" -}}
+{{-   $osID = printf "%s-%s" .chezmoi.os .chezmoi.osRelease.id -}}
+{{- end -}}
+
+{{- $name := promptStringOnce . "name" "Your name" -}}
+{{- $email := promptStringOnce . "email" "Your email (personal)" -}}
+
+data:
+  osid: {{ $osID | quote }}
+
+  # User info (prompted on first run)
+  name: {{ $name | quote }}
+  email: {{ $email | quote }}
+
+  # XDG directories
+  xdg_config_home: "{{ .chezmoi.homeDir }}/.config"
+  xdg_data_home: "{{ .chezmoi.homeDir }}/.local/share"
+  xdg_cache_home: "{{ .chezmoi.homeDir }}/.cache"
+  xdg_state_home: "{{ .chezmoi.homeDir }}/.local/state"
+
+  # Homebrew prefix (arm64 vs x86_64)
+  homebrew_prefix: {{ if eq .chezmoi.arch "arm64" }}"/opt/homebrew"{{ else }}"/usr/local"{{ end }}
+
+  # Font directory
+  font_dir: {{ if eq .chezmoi.os "darwin" }}"{{ .chezmoi.homeDir }}/Library/Fonts"{{ else }}"{{ .chezmoi.homeDir }}/.local/share/fonts"{{ end }}
+
+edit:
+  command: "nvim"
+
+merge:
+  command: "nvim"
+  args: ["-d"]

.chezmoiignore

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+# Repository files (not dotfiles)
+README.md
+CLAUDE.md
+LICENSE
+justfile
+install.sh
+devbox.json
+devbox.lock
+
+# Editor/tooling configs for this repo
+.editorconfig
+.stylua.toml
+.gitignore
+.gitkeep
+
+# CI/IDE directories
+.github/
+
+# macOS specific
+{{ if ne .chezmoi.os "darwin" }}
+Library/
+homebrew/
+{{ end }}
+
+# Linux specific (servers don't need GUI terminal config)
+{{ if ne .chezmoi.os "linux" }}
+.config/i3/
+.config/sway/
+{{ end }}
+
+# SSH/Server environment - skip GUI apps
+{{ if and (eq .chezmoi.os "linux") (env "SSH_CLIENT") }}
+.config/ghostty/
+{{ end }}
+
+# Local files (never managed by chezmoi)
+.zshrc.local
+.config/zsh/local.zsh
+.env.local
+
+# Claude Code - runtime/sensitive data (never add these)
+.claude/.anthropic/
+.claude/.claude.json
+.claude/debug/
+.claude/downloads/
+.claude/file-history/
+.claude/history.jsonl
+.claude/ide/
+.claude/image-cache/
+.claude/plans/
+.claude/plugins/
+.claude/projects/
+.claude/security_warnings_state_*.json
+.claude/session-env/
+.claude/shell-snapshots/
+.claude/stats-cache.json
+.claude/statsig/
+.claude/telemetry/
+.claude/todos/
+
+# Prevent accidental addition of literal ~ paths

.claude/rules/chezmoi-template.md

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+---
+paths: ["**/*.tmpl"]
+---
+
+# Chezmoi Template Rules
+
+## Template Syntax
+
+- Use Go template syntax: `{{ .variable }}`, `{{- ... -}}` for whitespace control
+- Access chezmoi data via `.chezmoi.os`, `.chezmoi.arch`, `.chezmoi.homeDir`
+- Custom data defined in `.chezmoi.yaml.tmpl` accessed via `.name`, `.email`, `.business_use`, etc.
+
+## Conditional Patterns
+
+```
+{{- if eq .chezmoi.os "darwin" }}
+# macOS-specific content
+{{- end }}
+```
+
+## Testing Changes
+
+Always test template changes with both environments:
+```bash
+chezmoi execute-template < file.tmpl              # Test with current config
+```

.claude/rules/nvim-lua.md

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+---
+paths: ["dot_config/nvim/**/*.lua"]
+---
+
+# Neovim Lua Rules
+
+## Formatting
+
+- Format with stylua (config in `.stylua.toml`)
+- Run `just fmt` before committing
+
+## Plugin Structure
+
+Plugins are organized in `dot_config/nvim/lua/plugins/`:
+- One file per plugin category (ui.lua, editor.lua, lsp.lua, etc.)
+- Uses lazy.nvim plugin manager with lazy-loading
+
+## Style
+
+- Prefer `vim.keymap.set()` over `vim.api.nvim_set_keymap()`
+- Use `<leader>` (Space) for custom keybindings
+- Group related options with comments

.claude/rules/zsh.md

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+---
+paths: ["dot_zsh*.tmpl"]
+---
+
+# Zsh Configuration Rules
+
+## Structure
+
+- `dot_zshenv.tmpl` - Environment variables only (loaded for all shells)
+- `dot_zshrc.tmpl` - Interactive shell config (aliases, functions, plugins)
+
+## Syntax Checking
+
+Chezmoi templates break zsh syntax checking. CI removes template syntax before checking:
+```bash
+sed 's/{{[^}]*}}//g' file.tmpl > /tmp/check.zsh && zsh -n /tmp/check.zsh
+```
+
+## Performance
+
+- Shell startup target: ~50ms
+- Uses zinit turbo mode for deferred plugin loading
+- Cache init scripts in `~/.cache/zsh/init/`