[FEATURE]: Add syntax highlighting support for Kotlin, HCL, Lua, and TOML #18197
Description
Syntax highlighting does not work for Kotlin, HCL, Lua, and TOML
Description
Tree-sitter parser support for syntax highlighting in the TUI for the following languages is missing:
- Kotlin
- HCL
- Lua
- TOML
Screenshot
Proposed Fix
Each language needs:
- A Tree-sitter wasm binary (from tree-sitter-grammars org or language-specific releases)
- Highlight queries (from nvim-treesitter or the grammar repo)
- Optional: locals queries for variable tracking
Implementation
Added parser entries in packages/opencode/parsers-config.ts:
| Language | Wasm Source | Queries |
|---|---|---|
| kotlin | fwcd/tree-sitter-kotlin v0.3.8 | fwcd kotlin highlights + nvim-treesitter locals |
| hcl | tree-sitter-grammars/tree-sitter-hcl v1.2.0 | nvim-treesitter hcl highlights |
| lua | tree-sitter-grammars/tree-sitter-lua v0.5.0 | tree-sitter-grammars lua highlights + locals |
| toml | tree-sitter-grammars/tree-sitter-toml v0.7.0 | nvim-treesitter toml highlights |
Verification
Restart OpenCode after updating. Tested with kotlin, hcl, lua, toml fenced code blocks in markdown.
Checklist
- Added parser entries for kotlin, hcl, lua, toml
- Verified typecheck passes
- Tested in TUI after restart