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Co-authored-by: Copilot <copilot@github.com>

.changeset/salty-jokes-crash.md

@@ -0,0 +1,5 @@
+---
+'@sveltejs/mcp': patch
+---
+
+fix: handle non call expressions passed to `is_rune`

LICENSE

@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2026 [Svelte Contributors](https://github.com/sveltejs/ai-tools/graphs/contributors)
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

documentation/docs/60-skills/.generated/skills.md

@@ -1,6 +1,6 @@
 ## `svelte-code-writer`
 
-CLI tools for Svelte 5 documentation lookup and code analysis. MUST be used whenever creating, editing or analyzing any Svelte component (.svelte) or Svelte module (.svelte.ts/.svelte.js). If possible, this skill should be executed within the svelte-file-editor agent for optimal results.
+CLI tools for Svelte 5 documentation lookup and code analysis. MUST be used whenever creating, editing or analyzing any Svelte component (`.svelte`) or Svelte module (`.svelte.ts`/`.svelte.js`). If possible, this skill should be executed within the `svelte-file-editor` subagent for optimal results.
 
 <a href="https://github.com/sveltejs/ai-tools/releases?q=svelte-code-writer" target="_blank" rel="noopener noreferrer">Open Releases page</a>
 

packages/mcp-server/src/mcp/autofixers/add-autofixers-issues.test.ts

@@ -775,5 +775,16 @@ describe('add_autofixers_issues', () => {
 				`You are reading the stateful variable "$x" with a "$" prefix. Stateful variables are not stores and should be read without the "$". Please read it as a normal variable "x"`,
 			);
 		});
+
+		// https://github.com/sveltejs/ai-tools/issues/200
+		it('should not crash when reading $-prefixed identifier for variable initialized with member expression', () => {
+			expect(() =>
+				run_autofixers_on_code(`<div>{$x}</div>
+
+					<script>
+					const x = foo.bar;
+					</script>`),
+			).not.toThrow();
+		});
 	});
 });

packages/mcp-server/src/parse/parse.ts

@@ -69,6 +69,8 @@ export function parse(code: string, file_path: string) {
 			return this.all_references.find((r) => r.identifier === id);
 		},
 		is_rune(call: CallExpression, rune?: (typeof runes)[number][]) {
+			// it should always be a call expression but we check just in case because sometimes it's any and TS doesn't complain
+			if (call.type !== 'CallExpression') return false;
 			if (call.callee.type !== 'Identifier' && call.callee.type !== 'MemberExpression')
 				return false;
 			const id = call.callee.type === 'Identifier' ? call.callee : call.callee.object;

packages/opencode/skills/svelte-code-writer/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: svelte-code-writer
-description: CLI tools for Svelte 5 documentation lookup and code analysis. MUST be used whenever creating, editing or analyzing any Svelte component (.svelte) or Svelte module (.svelte.ts/.svelte.js). If possible, this skill should be executed within the svelte-file-editor agent for optimal results.
+description: CLI tools for Svelte 5 documentation lookup and code analysis. MUST be used whenever creating, editing or analyzing any Svelte component (`.svelte`) or Svelte module (`.svelte.ts`/`.svelte.js`). If possible, this skill should be executed within the `svelte-file-editor` subagent for optimal results.
 ---
 
 # Svelte 5 Code Writer

plugins/claude/svelte/skills/svelte-code-writer/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: svelte-code-writer
-description: CLI tools for Svelte 5 documentation lookup and code analysis. MUST be used whenever creating, editing or analyzing any Svelte component (.svelte) or Svelte module (.svelte.ts/.svelte.js). If possible, this skill should be executed within the svelte-file-editor agent for optimal results.
+description: CLI tools for Svelte 5 documentation lookup and code analysis. MUST be used whenever creating, editing or analyzing any Svelte component (`.svelte`) or Svelte module (`.svelte.ts`/`.svelte.js`). If possible, this skill should be executed within the `svelte-file-editor` subagent for optimal results.
 ---
 
 # Svelte 5 Code Writer

plugins/cursor/svelte/skills/svelte-code-writer/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: svelte-code-writer
-description: CLI tools for Svelte 5 documentation lookup and code analysis. MUST be used whenever creating, editing or analyzing any Svelte component (.svelte) or Svelte module (.svelte.ts/.svelte.js). If possible, this skill should be executed within the svelte-file-editor agent for optimal results.
+description: CLI tools for Svelte 5 documentation lookup and code analysis. MUST be used whenever creating, editing or analyzing any Svelte component (`.svelte`) or Svelte module (`.svelte.ts`/`.svelte.js`). If possible, this skill should be executed within the `svelte-file-editor` subagent for optimal results.
 ---
 
 # Svelte 5 Code Writer

tools/skills/svelte-code-writer/SKILL.md

@@ -1,6 +1,6 @@
 ---
 name: svelte-code-writer
-description: CLI tools for Svelte 5 documentation lookup and code analysis. MUST be used whenever creating, editing or analyzing any Svelte component (.svelte) or Svelte module (.svelte.ts/.svelte.js). If possible, this skill should be executed within the svelte-file-editor agent for optimal results.
+description: CLI tools for Svelte 5 documentation lookup and code analysis. MUST be used whenever creating, editing or analyzing any Svelte component (`.svelte`) or Svelte module (`.svelte.ts`/`.svelte.js`). If possible, this skill should be executed within the `svelte-file-editor` subagent for optimal results.
 ---
 
 # Svelte 5 Code Writer