Markdown codeblock only render on exact match of neovim filetype name

[snoweuph]

I have confirmed that this is a bug related to nvf

• This is a bug, and not an user error or a support request. I understand that my issue will be closed if it is not a bug in nvf.
• I have checked the issues tab and confirmed that my issue has not yet been reported. I understand that my issue will be closed if it is a duplicate.

Description

Markdown Codeblocks only render when set to yaml not when set to yml

Installation Method

Standalone (flake outputs, nix profile install, etc.)

Installation Method (Other)

No response

nvf Version

main

Reproduction steps

1. Activate yml TS support
2. write something like this in a markdown file

```yaml
hello:
  bam: 1
  bazz: bazz
```

```yml
hello:
  bam: 1
  bazz: bazz
```

3. Only One is highlighted

Expected behavior

aliases like yml for yaml are also hiughlighted.
I also noticed that zsh doesnt render as sh

Actual Behavior

Only the "real" language ID renders colors

System Information

nix-info --markdown
 - system: `"x86_64-linux"`
 - host os: `Linux 6.12.66, NixOS, 25.11 (Xantusia), 25.11.20260128.fa83fd8`
 - multi-user?: `yes`
 - sandbox: `yes`
 - version: `nix-env (Nix) 2.31.2`
 - channels(root): `"nixos-24.11"`
 - nixpkgs: `/nix/store/vl17kg85iryyjyf114vkqzskn7s9d5x5-source`

Relevant log output

none

[horriblename]

is that something anyone has got working in nvim in general? The injection only works if it matches the filetype name (:set filetype) I don't think there's anything we can do here

[NotAShelf]

FWIW we can use the upcoming filetype API to set those automatically in the yaml module while enabled

[snoweuph]

before nvf I just used nvim-treesitter/nvim-treesitter through lazy with

• auto_install = true
• highlight = { enable = true }
• indent = { enable = true }

and it just worked

[horriblename]

https://github.com/nvim-treesitter/nvim-treesitter/pull/4659 possibly related, did not read the whole thing :p

[snoweuph]

yea, that seems to be the reason for it working in my old nvim config. also back then noticed that zsh wasnt highlighted but bash and sh were. seems to perfectly match that reasoning

[snoweuph]

FWIW we can use the upcoming filetype API to set those automatically in the yaml module while enabled

could we use those for all filetypes in all filetypes? 👀

[NotAShelf]

See #1365