refactor: split native adapter timeout and failure seams

sdk/src/query-gsd-tools-runtime.ts

@@ -44,6 +44,8 @@ export function createGSDToolsRuntime(opts: {
     dispatch: (registryCommand, registryArgs) => registry.dispatch(registryCommand, registryArgs, opts.projectDir),
     createTimeoutError: (message, command, args) =>
       GSDToolsError.timeout(message, command, args, '', opts.timeoutMs),
+    createFailureError: (message, command, args, cause) =>
+      GSDToolsError.failure(message, command, args, 1, '', { cause }),
   });
 
   const transport = new GSDTransport(registry, {

sdk/src/query-native-direct-adapter.test.ts

@@ -0,0 +1,35 @@
+import { describe, expect, it } from 'vitest';
+import { GSDToolsError } from './gsd-tools-error.js';
+import { QueryNativeDirectAdapter } from './query-native-direct-adapter.js';
+
+describe('QueryNativeDirectAdapter', () => {
+  it('wraps native failures as typed failure errors', async () => {
+    const adapter = new QueryNativeDirectAdapter({
+      timeoutMs: 1000,
+      dispatch: async () => {
+        throw new Error('boom');
+      },
+      createTimeoutError: (message, command, args) => GSDToolsError.timeout(message, command, args),
+      createFailureError: (message, command, args, cause) => GSDToolsError.failure(message, command, args, 1, '', { cause }),
+    });
+
+    await expect(adapter.dispatchJson('state', ['load'], 'state.load', [])).rejects.toMatchObject({
+      classification: { kind: 'failure' },
+      command: 'state',
+    });
+  });
+
+  it('preserves timeout errors', async () => {
+    const timeoutErr = GSDToolsError.timeout('timeout', 'state', ['load']);
+    const adapter = new QueryNativeDirectAdapter({
+      timeoutMs: 1000,
+      dispatch: async () => {
+        throw timeoutErr;
+      },
+      createTimeoutError: (message, command, args) => GSDToolsError.timeout(message, command, args),
+      createFailureError: (message, command, args, cause) => GSDToolsError.failure(message, command, args, 1, '', { cause }),
+    });
+
+    await expect(adapter.dispatchJson('state', ['load'], 'state.load', [])).rejects.toBe(timeoutErr);
+  });
+});

sdk/src/query-native-direct-adapter.ts

@@ -1,11 +1,13 @@
 import { formatQueryRawOutput } from './query-raw-output-projection.js';
-import { timeoutMessage } from './query-failure-classification.js';
+import { GSDToolsError } from './gsd-tools-error.js';
+import { errorMessage, timeoutMessage } from './query-failure-classification.js';
 import type { QueryResult } from './query/utils.js';
 
 export interface QueryNativeDirectAdapterDeps {
   timeoutMs: number;
   dispatch: (registryCommand: string, registryArgs: string[]) => Promise<QueryResult>;
   createTimeoutError: (message: string, command: string, args: string[]) => Error;
+  createFailureError: (message: string, command: string, args: string[], cause: unknown) => Error;
 }
 
 /**
@@ -15,7 +17,12 @@ export class QueryNativeDirectAdapter {
   constructor(private readonly deps: QueryNativeDirectAdapterDeps) {}
 
   async dispatchResult(legacyCommand: string, legacyArgs: string[], registryCommand: string, registryArgs: string[]): Promise<QueryResult> {
-    return this.withTimeout(legacyCommand, legacyArgs, this.deps.dispatch(registryCommand, registryArgs));
+    try {
+      return await this.withTimeout(legacyCommand, legacyArgs, this.deps.dispatch(registryCommand, registryArgs));
+    } catch (error) {
+      if (error instanceof GSDToolsError) throw error;
+      throw this.deps.createFailureError(errorMessage(error), legacyCommand, legacyArgs, error);
+    }
   }
 
   async dispatchJson(legacyCommand: string, legacyArgs: string[], registryCommand: string, registryArgs: string[]): Promise<unknown> {