Neovim duplicates { and [ on key release since Ghostty 1.3.x

[Flyboy1010]

Issue Description

Since upgrading from Ghostty 1.2.3 to 1.3.1, Neovim inserts { and [ twice.

For example, pressing { once results in {{. The first character appears when pressing the key, and the second appears when releasing it.

The same happens with [.

Expected Behavior

Pressing { or [ once should insert exactly one character.

Actual Behavior

pressing { once results in {{. The first character appears when pressing the key, and the second appears when releasing it.

Reproduction Steps

1. Open Ghostty 1.3.1.
2. Run nvim --clean.
3. Enter Insert mode.
4. Press { once and release it.
5. Observe that {{ is inserted.

The same happens with [.

Ghostty Logs

No response

Ghostty Version

1.3.1-arch2.2

OS Version Information

Cachy Os (Arch based)

(Linux only) Display Server

Wayland

(Linux only) Desktop Environment/Window Manager

Niri

Minimal Ghostty Configuration

theme = noctalia

font-family = JetBrainsMono Nerd Font
font-size = 13.5
font-style = SemiBold

background-opacity = 0.9

font-feature = liga
font-feature = calt
font-feature = ss02

adjust-cell-height = -5

working-directory = home
window-inherit-working-directory = false

Additional Relevant Configuration

The issue does not occur with Alacritty using the same Neovim installation.

I acknowledge that:

• I have reviewed the FAQ and confirm that my issue is NOT among them.
• I have searched the Ghostty documentation and confirm there doesn't exist a configuration option that solves my issue.
• I have searched the Ghostty repository (both open and closed Discussions and Issues) and confirm this is not a duplicate of an existing issue or discussion.
• I have checked the "Preview" tab on all text fields to ensure that everything looks right, and have wrapped all configuration and code in code blocks with a group of three backticks (```) on separate lines.

[hoangperry]

This matches a known 1.3.x regression — see #12084, which reports the same pattern: characters doubled only inside Neovim, specifically keys that live on the physical bracket key (! and ] on a Swiss German layout there; { / [ in your case), starting with 1.3.x and absent in 1.2.3. There's also a related upstream report at neovim/neovim#31806.

Why only Neovim: Neovim opts into the kitty keyboard protocol with key-event reporting, so it receives press and release events; other programs (and other terminals without the regression) never surface the release as text. In the #12084 thread the Ghostty terminal inspector showed two events being emitted for a single physical keypress, and Kitty/Alacritty on the same setup were clean — which fits your Alacritty observation exactly.

Things you can do right now:

1. Confirm it locally: open Ghostty's Terminal Inspector, watch the key events while pressing { once — you should see the spurious second event on release.
2. Workaround: downgrade to 1.2.3 (downgrade ghostty on Arch-based distros, or pin the package). Users in Some keys are repeated in neovim 0.12.0 #12084 confirmed 1.2.3 is clean and all 1.3.x builds are affected.
3. Help it get fixed: add your layout + the press/release detail to Some keys are repeated in neovim 0.12.0 #12084 or file an issue referencing both threads — your observation that the second character arrives on key release is a sharper diagnostic than what's in the other thread so far.

Which keyboard layout are you on? So far the reports cluster on layouts where these characters involve the bracket keys with a modifier, which is a useful data point for the maintainers.

[Marks20125]

I was going to make the same discussion before. I'm on spanish layout, however I've noticed it only happens with a specific sequence

Timeline.1.mp4

[Flyboy1010]

I’m also using a Spanish layout, and it happens like in the video.

[jcollie]

#13861