SvelteLS.MCP

Instructions

Implementation Reference

• src/tools/editing.ts:21-73 (handler)

  The `rename_symbol` tool is registered and implemented in this block, using LSP `textDocument/prepareRename` and `textDocument/rename` requests, and then applying the changes via `applyWorkspaceEdit`.

  server.registerTool(
    "rename_symbol",
    {
      title: "Rename Symbol",
      description:
        "Rename a symbol across the workspace. Applies changes to disk.",
      inputSchema: z.object({
        filePath: z.string().describe("Absolute path to the file"),
        symbolName: z.string().describe("Name of the symbol to rename"),
        newName: z.string().describe("New name for the symbol"),
        symbolKind: z.string().optional().describe("Kind of symbol"),
      }),
    },
    async ({
      filePath,
      symbolName,
      newName,
      symbolKind,
    }): Promise<ToolResult> => {
      try {
        const prep = await prepareSymbolRequest(lsp, filePath, symbolName, symbolKind);
        if ("error" in prep) return textResult(prep.error);
  
        // Prepare rename check
        const prepareResult = await lsp.request(
          "textDocument/prepareRename",
          makePositionParams(prep.ctx)
        );
        if (!prepareResult) {
          return textResult(`Symbol '${symbolName}' cannot be renamed.`);
        }
  
        // Execute rename
        const renameParams = {
          ...makePositionParams(prep.ctx),
          newName,
        };
        const result = await lsp.request("textDocument/rename", renameParams);
  
        if (!result) return textResult("Rename failed - no changes returned.");
  
        const applied = await applyWorkspaceEdit(lsp, result);
        const summary = formatRenameEdit(result, symbolName, newName);
        return textResult(
          applied
            ? summary
            : `(dry-run, edits NOT applied to disk)\n\n${summary}`
        );
      } catch (ex) {
        return textResult(formatError(ex));
      }
    }
  );