🌲 Explore switchable theme: Everforest

[martinciu]

🎯 Goal

Add Everforest (Dark Medium — Sainnhe's recommended default) as a
ninth selectable theme via the theme-set <name> fish switcher.
Machinery landed in #185; Gruvbox reference implementation in #193.

Variant pick: Dark Medium. Hard / Soft contrast change bg /
bg_dim only — accents stay identical. Light variants out of scope
(parallel reasoning to #188's deferral).

🎨 Palette (Dark Medium)

• bg/surface: bg0 #2d353b, bg1 #343f44, bg2 #3d484d, bg3 #475258, bg4 #4f585e
• fg: fg #d3c6aa, grey0 #7a8478, grey1 #859289, grey2 #9da9a0
• accents: red #e67e80, orange #e69875, yellow #dbbc7f, green #a7c080, aqua #83c092, blue #7fbbb3, purple #d699b6
• statusline: statusline1 (green) #a7c080, statusline2 (blue) #7fbbb3, statusline3 (red) #e67e80

📐 Architecture

Machinery is settled (#185). Slot in following the Gruvbox shape (#193).

🛠️ Work breakdown

• `.config/themes/everforest.tmux` — semantic `@color_*` map
• `.config/themes/delta-everforest.gitconfig` — probe `bat --list-themes | grep -i everforest`; vendor `.tmTheme` from `sainnhe/sonokai` or `sainnhe/everforest` if missing
• `.config/ghostty/theme-everforest.ghostty` — Ghostty 1.0+ likely ships "Everforest Dark" (verify with `ghostty +list-themes | grep -i everforest`); vendor if missing
• `.config/starship-everforest.toml` — `pastel_rose = '#d699b6'` (Everforest purple/pink — closest rose analogue)
• `.config/glow/glamour-everforest.json`
• `.config/gh-dash/config-everforest.yml`
• `.config/lnav/configs/installed/theme-everforest.json` — probe; vendor theme-defs if missing
• nvim: `sainnhe/everforest` plugin spec (the canonical Vimscript port; or `neanias/everforest-nvim` for a Lua-native alternative); extend resolver
• Extend `theme-set.fish` switch (`case everforest`) + completion + `test-theme-switch.sh` round-trip

⚖️ Tradeoff

Win: green-tinted warm palette, often described as "Gruvbox's
gentler cousin". Lower-contrast than Gruvbox so easier on the eyes for
long sessions; distinct identity through its green-leaning fg
(#d3c6aa).

Loss: Everforest's red #e67e80 and orange #e69875 are even
closer in hue than Gruvbox's (#cc241d red vs #d65d0e orange).
The unique-accent rule walk-through from #188 applies more sharply
here — strongly consider widening the PR chip's separation.

🚦 Open questions

• Red vs orange collision (sharper than Gruvbox's):
  • Status-quo: PR chip orange #e69875, red #e67e80 defined but
    unused on the bar → no visible collision, just a tight palette.
  • Alternative: repaint PR chip to aqua #83c092 to widen the
    palette spread and free up orange/red for future pins.
  • Recommendation: keep PR chip orange in v1 (matches Solarized /
    Mocha / Dracula / Gruvbox's positional semantic); revisit if the
    visual check after merge reads as flat.
• Chip text inversion: muted warm palette → dark-on-accent
  (@color_light_fg = '#2d353b' bg0). Same logic as Gruvbox.
• nvim plugin pick: `sainnhe/everforest` is the author's canonical
  Vimscript port. `neanias/everforest-nvim` is a Lua reimplementation
  with treesitter-native highlights — slightly faster startup, more
  granular config. Default to author's canonical for fidelity; revisit
  if startup time matters.
• Hard vs Medium vs Soft contrast: Medium is the author's
  recommended default. Hard is most popular among Gruvbox refugees who
  want more contrast; Soft for low-light workflows. Pick Medium for v1.
• Unique-accent rule mapping (clean — seven distinct hues
  including aqua):
  • session chip (blue): blue #7fbbb3
  • active window pin (green): green #a7c080
  • PR chip (orange): orange #e69875 (see collision note above)
  • git main chip (violet): purple #d699b6
  • git wt chip (yellow): yellow #dbbc7f

🧠 Lessons

See consolidated lessons in #188 and the Gruvbox PR (#193). The red /
orange collision walk-through from #188 applies more sharply here.

🔗 Links

• Homepage / Vimscript plugin: https://github.com/sainnhe/everforest
• Lua port: https://github.com/neanias/everforest-nvim
• Palette spec: https://github.com/sainnhe/everforest/blob/master/palette.md