fix(debug): resolve relative dap commands from cwd

packages/coding-agent/src/dap/config.ts

@@ -171,6 +171,19 @@ export function getAdapterConfigs(cwd?: string): Record<string, DapAdapterConfig
 	return cwd ? loadAdapterConfigs(cwd) : { ...DEFAULT_ADAPTERS };
 }
 
+function normalizeCommandForCwd(command: string, cwd: string): string {
+	if (path.isAbsolute(command)) return command;
+	if (
+		command.startsWith("./") ||
+		command.startsWith("../") ||
+		command.startsWith(".\\") ||
+		command.startsWith("..\\")
+	) {
+		return path.resolve(cwd, command);
+	}
+	return command;
+}
+
 function resolveAdapterFromConfig(
 	adapterName: string,
 	configs: Record<string, DapAdapterConfig>,
@@ -178,7 +191,7 @@ function resolveAdapterFromConfig(
 ): DapResolvedAdapter | null {
 	const config = configs[adapterName];
 	if (!config) return null;
-	const resolvedCommand = resolveCommand(config.command, cwd);
+	const resolvedCommand = resolveCommand(normalizeCommandForCwd(config.command, cwd), cwd);
 	if (!resolvedCommand) return null;
 	return {
 		name: adapterName,

packages/coding-agent/test/debug/dap-config.test.ts

@@ -121,6 +121,31 @@ describe("DAP adapter configuration", () => {
 		expect(selected?.launchDefaults).toEqual({ request: "launch", projectRoot: "." });
 	});
 
+	it("resolves relative adapter commands from the debug cwd", async () => {
+		const cwd = await makeTempDir("omp-dap-config-relative-command-");
+		const command = path.join(cwd, "tools", process.platform === "win32" ? "debug-adapter.cmd" : "debug-adapter");
+		await fs.mkdir(path.dirname(command), { recursive: true });
+		await fs.writeFile(command, "");
+		await fs.chmod(command, 0o755);
+		await fs.writeFile(
+			path.join(cwd, "dap.json"),
+			JSON.stringify({
+				adapters: {
+					relative: {
+						command: process.platform === "win32" ? ".\\tools\\debug-adapter.cmd" : "./tools/debug-adapter",
+						fileTypes: [".rel"],
+					},
+				},
+			}),
+		);
+
+		const adapter = resolveAdapter("relative", cwd);
+		expect(adapter?.command).toBe(
+			process.platform === "win32" ? ".\\tools\\debug-adapter.cmd" : "./tools/debug-adapter",
+		);
+		expect(adapter?.resolvedCommand).toBe(command);
+	});
+
 	it("loads plugin DAP adapters from plugin config files", async () => {
 		const cwd = await makeTempDir("omp-dap-config-plugin-");
 		const pluginRoot = path.join(cwd, "plugins", "acme-debug");