Fix async keyword highlighting

package.json

@@ -2,7 +2,7 @@
 	"name": "surrealql",
 	"displayName": "SurrealQL",
 	"description": "Language support for SurrealQL — syntax highlighting, language server, run-query code lens, and snippets",
-	"version": "0.4.1",
+	"version": "0.4.2",
 	"publisher": "surrealdb",
 	"icon": "./icon.png",
 	"author": {
@@ -15,14 +15,15 @@
 	"scripts": {
 		"typecheck": "tsc --noEmit -p tsconfig.json",
 		"build": "node esbuild.config.mjs",
+		"build:grammar": "node scripts/build-keywords.mjs",
 		"build:watch": "node esbuild.config.mjs --watch",
 		"vscode:prepublish": "node esbuild.config.mjs --production",
 		"lint:check": "biome check . --formatter-enabled=false",
 		"lint:apply": "biome check . --formatter-enabled=false --write",
 		"lint:apply:unsafe": "biome check . --formatter-enabled=false --write --unsafe",
 		"test": "bun test test/textmate",
 		"test:textmate": "bun test test/textmate",
-		"validate": "bun run typecheck && biome check . && bun run test && bun run build"
+		"validate": "bun run build:grammar && bun run typecheck && biome check . && bun run test && bun run build"
 	},
 	"repository": {
 		"type": "git",

raw/keywords.txt

@@ -10,6 +10,7 @@ API
 AS
 ASC
 ASSERT
+ASYNC
 AT
 AUTHENTICATE
 AUTO

scripts/build-keywords.mjs

@@ -0,0 +1,45 @@
+#!/usr/bin/env node
+/**
+ * Regenerate TextMate keyword patterns from raw/keywords.txt.
+ * Splits into smaller alternations (longest-first) for reliable Oniguruma matching.
+ */
+
+import { readFileSync, writeFileSync } from "node:fs";
+import { dirname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+
+const root = join(dirname(fileURLToPath(import.meta.url)), "..");
+const keywordsPath = join(root, "raw/keywords.txt");
+const grammarPath = join(root, "syntaxes/surrealql.tmLanguage.json");
+
+/** Keywords handled elsewhere or too ambiguous as case-insensitive reserved words. */
+const EXCLUDE = new Set(["and", "or", "post"]);
+
+const CHUNK_SIZE = 35;
+
+const keywords = [
+	...new Set([
+		...readFileSync(keywordsPath, "utf8")
+			.split("\n")
+			.map((line) => line.trim().toLowerCase())
+			.filter((word) => word && !EXCLUDE.has(word)),
+	]),
+].sort((a, b) => b.length - a.length);
+
+const patterns = [];
+for (let i = 0; i < keywords.length; i += CHUNK_SIZE) {
+	const chunk = keywords.slice(i, i + CHUNK_SIZE);
+	patterns.push({
+		name: "keyword.control keyword.control.surrealql",
+		match: `(?i)\\b(${chunk.join("|")})\\b`,
+	});
+}
+
+const grammar = JSON.parse(readFileSync(grammarPath, "utf8"));
+grammar.repository.keywords.patterns = patterns;
+
+writeFileSync(grammarPath, `${JSON.stringify(grammar, null, "\t")}\n`);
+
+console.log(
+	`Updated ${grammarPath}: ${patterns.length} keyword patterns, ${keywords.length} keywords`,
+);

snippets.json

@@ -176,6 +176,10 @@
 		"prefix": "define event",
 		"body": ["DEFINE EVENT $1 ON $2 WHEN ($3) THEN {", "\t$4", "};"]
 	},
+	"Define an async event": {
+		"prefix": "define event async",
+		"body": ["DEFINE EVENT $1 ON $2 WHEN ($3) ASYNC THEN {", "\t$4", "};"]
+	},
 	"Define a function": {
 		"prefix": "define function",
 		"body": ["DEFINE FUNCTION fn::$1($2) {", "\t$3", "};"]

syntaxes/surrealql.tmLanguage.json

@@ -88,8 +88,28 @@
 		"keywords": {
 			"patterns": [
 				{
-					"name": "keyword.control.surrealql",
-					"match": "(?i)\\b(keep_pruned_connections|doc_lengths_cache|doc_lengths_order|extend_candidates|postings_cache|postings_order|doc_ids_cache|doc_ids_order|authenticate|concurrently|mtree_cache|permissions|terms_cache|terms_order|transaction|changefeed|highlights|middleware|schemafull|schemaless|tokenizers|algorithm|dimension|duplicate|functions|namespace|overwrite|reference|structure|tempfiles|analyzer|capacity|computed|continue|database|duration|enforced|flexible|parallel|passhash|password|readonly|relation|function|backend|cascade|changes|collate|columns|comment|content|default|exclude|explain|expunge|filters|graphql|include|noindex|numeric|rebuild|replace|session|timeout|version|access|always|assert|bucket|cancel|commit|config|create|define|delete|exists|fields|ignore|insert|issuer|normal|option|record|reject|relate|remove|return|search|select|signin|signup|strict|tables|unique|update|upsert|values|alter|begin|break|defer|event|fetch|field|group|index|limit|merge|mtree|order|param|patch|roles|scope|since|sleep|split|start|table|throw|token|trace|unset|value|where|auto|bm25|desc|dist|drop|else|from|hnsw|info|into|kill|live|omit|only|root|show|then|type|user|when|with|all|any|api|asc|efc|end|for|get|jwt|key|let|not|out|put|set|url|use|as|at|by|db|if|in|lm|m0|ns|on|sc|tb|to|m)\\b"
+					"name": "keyword.control keyword.control.surrealql",
+					"match": "(?i)\\b(keep_pruned_connections|doc_lengths_cache|doc_lengths_order|extend_candidates|postings_cache|postings_order|doc_ids_cache|doc_ids_order|authenticate|concurrently|mtree_cache|permissions|terms_cache|terms_order|transaction|changefeed|highlights|middleware|schemafull|schemaless|tokenizers|algorithm|dimension|duplicate|functions|namespace|overwrite|reference|structure|tempfiles|analyzer|capacity|computed|continue|database)\\b"
+				},
+				{
+					"name": "keyword.control keyword.control.surrealql",
+					"match": "(?i)\\b(duration|enforced|flexible|function|parallel|passhash|password|readonly|relation|backend|cascade|changes|collate|columns|comment|content|default|exclude|explain|expunge|filters|graphql|include|noindex|numeric|rebuild|replace|session|timeout|version|access|always|assert|bucket|cancel)\\b"
+				},
+				{
+					"name": "keyword.control keyword.control.surrealql",
+					"match": "(?i)\\b(commit|config|create|define|delete|exists|fields|ignore|insert|issuer|normal|option|record|reject|relate|remove|return|search|select|signin|signup|tables|unique|update|upsert|values|alter|async|begin|break|defer|event|fetch|field|group)\\b"
+				},
+				{
+					"name": "keyword.control keyword.control.surrealql",
+					"match": "(?i)\\b(index|limit|merge|mtree|order|param|patch|roles|scope|since|sleep|split|start|table|throw|token|trace|unset|value|where|auto|bm25|desc|dist|drop|else|from|hnsw|info|into|kill|live|omit|only|root)\\b"
+				},
+				{
+					"name": "keyword.control keyword.control.surrealql",
+					"match": "(?i)\\b(show|then|type|user|when|with|all|any|api|asc|efc|end|for|get|jwt|key|let|not|out|put|set|url|use|as|at|by|db|if|in|lm|m0|ns|on|sc|tb)\\b"
+				},
+				{
+					"name": "keyword.control keyword.control.surrealql",
+					"match": "(?i)\\b(to|m)\\b"
 				}
 			]
 		},

test/textmate/textmate.test.ts

@@ -1,5 +1,7 @@
 import { describe, expect, test } from "bun:test";
+import { INITIAL } from "vscode-textmate";
 import {
+	grammar,
 	lineTokenParts,
 	scopeAtColumn,
 	scopeForSubstring,
@@ -15,6 +17,21 @@ describe("SurrealQL TextMate grammar", () => {
 		expect(scopeAtColumn("DEFINE TABLE x", 7)).toBe("keyword.control.surrealql");
 	});
 
+	test("DEFINE EVENT ASYNC keyword", () => {
+		const line = "DEFINE EVENT e ON TABLE file WHEN $event = 'DELETE' ASYNC THEN { };";
+		expect(scopeForSubstring(line, "ASYNC")).toBe("keyword.control.surrealql");
+		expect(scopeForSubstring(line, "WHEN")).toBe("keyword.control.surrealql");
+		expect(scopeForSubstring(line, "THEN")).toBe("keyword.control.surrealql");
+	});
+
+	test("ASYNC uses standard keyword.control scope for theme compatibility", () => {
+		const line = "DEFINE EVENT e ON TABLE t WHEN $event = 'DELETE' ASYNC THEN { };";
+		const { tokens } = grammar.tokenizeLine(line, INITIAL);
+		const asyncToken = tokens.find((t) => line.slice(t.startIndex, t.endIndex) === "ASYNC");
+		expect(asyncToken?.scopes).toContain("keyword.control");
+		expect(asyncToken?.scopes).toContain("keyword.control.surrealql");
+	});
+
 	test("identifiers (not reserved words)", () => {
 		expect(scopeAtColumn("FROM person", 5)).toBe("variable.other.surrealql");
 		expect(scopeForSubstring("DEFINE TABLE post SCHEMALESS", "post")).toBe(