[BUG]: No Swift syntax highlighting — highlights.scm from main is incompatible with pinned tree-sitter-swift 0.7.1 wasm

about: Swift files get no syntax highlighting in the TUI because the pinned parser and the fetched highlights query are incompatible
labels: ["bug"]
title: "[BUG]: No Swift syntax highlighting — highlights.scm from main is incompatible with pinned tree-sitter-swift 0.7.1 wasm"

Description

Swift files get no syntax highlighting in the TUI (file views, diffs, code blocks). The TUI silently falls back to plain text.

Root cause: parsers-config.ts pins the Swift parser wasm to tree-sitter-swift 0.7.1 but fetches highlights.scm from the grammar repo's main branch:

{
  filetype: "swift",
  wasm: "https://github.com/alex-pinkus/tree-sitter-swift/releases/download/0.7.1/tree-sitter-swift.wasm",
  queries: {
    highlights: [
      "https://raw.githubusercontent.com/alex-pinkus/tree-sitter-swift/main/queries/highlights.scm",
    ],
    ...
  },
}

main's highlights query has drifted from the 0.7.1 parser (e.g. it references a nil_literal node that doesn't exist in 0.7.1), so the query fails to compile and highlighting for the whole language is dropped. I verified this directly with web-tree-sitter 0.25.8:

• wasm 0.7.1 + main's highlights.scm → QUERY COMPILE FAILED: Bad node name 'nil_literal'
• wasm 0.7.1 + 0.7.1-tagged highlights.scm → compiles and matches fine

This is the same wasm/query version-mismatch pattern flagged in review on #43496 ("swift (wasm 0.7.1 vs highlights 0.7.3)"), which is still unfixed on dev as of today.

Suggested fix: pin the highlights query to the 0.7.1 tag (one-line change), or bump the wasm to a release that matches main's queries.

Plugins

none

OpenCode version

1.18.25

Steps to reproduce

1. Open any .swift file in the TUI (or view a diff / a ```swift code block)
2. Observe the text renders unhighlighted while other languages (Go, Rust, Python, ...) are highlighted

Screenshot and/or share link

n/a

Operating System

macOS 15.5

Terminal

Ghostty