diff --git a/packages/coding-agent/src/core/resource-loader.ts b/packages/coding-agent/src/core/resource-loader.ts
index c8b6e2c21..6632315ed 100644
--- a/packages/coding-agent/src/core/resource-loader.ts
+++ b/packages/coding-agent/src/core/resource-loader.ts
@@ -70,6 +70,9 @@ function loadContextFileFromDir(dir: string): { path: string; content: string }
 		const filePath = join(dir, filename);
 		if (existsSync(filePath)) {
 			try {
+				if (!statSync(filePath).isFile()) {
+					continue;
+				}
 				return {
 					path: filePath,
 					content: readFileSync(filePath, "utf-8"),
diff --git a/packages/coding-agent/test/resource-loader.test.ts b/packages/coding-agent/test/resource-loader.test.ts
index e458ec7bd..9989ab1ce 100644
--- a/packages/coding-agent/test/resource-loader.test.ts
+++ b/packages/coding-agent/test/resource-loader.test.ts
@@ -2,7 +2,7 @@ import { mkdirSync, readFileSync, rmSync, symlinkSync, writeFileSync } from "nod
 import { tmpdir } from "node:os";
 import { join } from "node:path";
 import { pathToFileURL } from "node:url";
-import { afterEach, beforeEach, describe, expect, it } from "vitest";
+import { afterEach, beforeEach, describe, expect, it, vi } from "vitest";
 import { AuthStorage } from "../src/core/auth-storage.ts";
 import { ExtensionRunner } from "../src/core/extensions/runner.ts";
 import { DefaultResourceLoader } from "../src/core/resource-loader.ts";
@@ -355,6 +355,22 @@ Content`,
 			expect(agentsFiles.some((f) => f.path.includes("AGENTS.md"))).toBe(true);
 		});
 
+		it("should ignore context file candidates that are directories", async () => {
+			mkdirSync(join(cwd, "AGENTS.md"));
+			writeFileSync(join(cwd, "CLAUDE.md"), "Fallback instructions");
+			const consoleError = vi.spyOn(console, "error").mockImplementation(() => {});
+
+			const loader = new DefaultResourceLoader({ cwd, agentDir });
+			await loader.reload();
+
+			expect(loader.getAgentsFiles().agentsFiles).toContainEqual({
+				path: join(cwd, "CLAUDE.md"),
+				content: "Fallback instructions",
+			});
+			expect(consoleError).not.toHaveBeenCalledWith(expect.stringContaining(join(cwd, "AGENTS.md")));
+			consoleError.mockRestore();
+		});
+
 		it("should skip AGENTS.md and CLAUDE.md discovery when noContextFiles is true", async () => {
 			writeFileSync(join(cwd, "AGENTS.md"), "# Project Guidelines\n\nBe helpful.");
 			writeFileSync(join(cwd, "CLAUDE.md"), "# Claude Guidelines\n\nBe helpful.");