From 0d2bca1344e5f1ae3e80c9aaf7eb0608b2612bf0 Mon Sep 17 00:00:00 2001
From: Diego de los Santos <diego.delossantos@belden.com>
Date: Fri, 17 Apr 2026 10:20:33 +0200
Subject: [PATCH] feat(tui): add tree-sitter-diff parser for diff syntax
 highlighting

Fenced code blocks with language `diff` were not syntax-highlighted
because no tree-sitter-diff parser was registered. The theme already
maps @diff.plus and @diff.minus to green/red colors, so only the
parser entry was missing.

Closes #6831
---
 packages/opencode/parsers-config.ts | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/packages/opencode/parsers-config.ts b/packages/opencode/parsers-config.ts
index b4951afa2256..ed998ee3fef2 100644
--- a/packages/opencode/parsers-config.ts
+++ b/packages/opencode/parsers-config.ts
@@ -286,5 +286,14 @@ export default {
         ],
       },
     },
+    {
+      filetype: "diff",
+      wasm: "https://github.com/tree-sitter-grammars/tree-sitter-diff/releases/download/v0.1.0/tree-sitter-diff.wasm",
+      queries: {
+        highlights: [
+          "https://raw.githubusercontent.com/tree-sitter-grammars/tree-sitter-diff/refs/heads/main/queries/highlights.scm",
+        ],
+      },
+    },
   ],
 }