docs(ghostty): the index stops carrying a second copy of the reference
`tools/ghostty/index.md` had its own Custom Shaders section and its own eight-row default keybinding table. `configuration.md` owns both, in more detail, and the copies had already drifted: the index claimed `ctrl+` raises the font size where the reference's appendix lists `ctrl+=` / `ctrl++`. An index exists to route a reader to the page that owns the fact; a second summary of the same facts just guarantees two versions that age differently. What the index keeps is the routing plus the one fact worth having at hand (`ctrl+shift+,` reloads the config), and the config-syntax "Key Points" — repeatable options, `option = ""` resets, `?` optional includes — which the reference never states as a set, only per option. Refs #64
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@@ -88,35 +88,17 @@ palette-generate = true
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---
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## Custom Shaders
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## Details that live in the reference
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Ghostty supports Shadertoy-compatible GLSL shaders:
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* [Custom Shaders](configuration.md#custom-shaders) — `custom-shader` (repeatable) and
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`custom-shader-animation`, plus the uniform list (`iChannel0`, resolution, time, cursor,
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palette, focus).
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* [Default Keybindings](configuration.md#appendix-default-keybindings) — the full table. The one
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you will want first: `ctrl+shift+,` runs `reload_config`.
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```ini
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custom-shader = ~/.config/ghostty/shaders/vignette.glsl
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custom-shader-animation = true
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```
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Shaders receive uniforms for the terminal screen texture (`iChannel0`), cursor position, palette colors, and focus state.
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---
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## Default Keybindings
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| Keybind | Action |
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|---------|--------|
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| `ctrl+shift+,` | `reload_config` |
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| `ctrl+` / `ctrl+=` | `increase_font_size:1` |
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| `ctrl+-` | `decrease_font_size:1` |
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| `ctrl+0` | `reset_font_size` |
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| `ctrl+shift+f` | `start_search` |
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| `ctrl+shift+a` | `select_all` |
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| `ctrl+Enter` | `toggle_fullscreen` |
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| `ctrl+shift+P` | `toggle_command_palette` |
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See [Configuration Reference](configuration.md#appendix-default-keybindings) for the full table.
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---
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An earlier copy of this index carried its own eight-row keybinding table and its own shader
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example. Both were subsets of the reference and neither was kept in step with it, which is the
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usual fate of a second copy.
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## Cross-References
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