update message

src/__tests__/ensemble/takt-pack-config.test.ts

@@ -19,6 +19,7 @@ import {
   validateMinVersion,
   isVersionCompatible,
   checkPackageHasContent,
+  checkPackageHasContentWithContext,
   validateRealpathInsideRoot,
   resolvePackConfigPath,
 } from '../../features/ensemble/takt-pack-config.js';
@@ -247,6 +248,14 @@ describe('checkPackageHasContent', () => {
     expect(() => checkPackageHasContent(tempDir)).toThrow();
   });
 
+  it('should include manifest/path/hint details in contextual error', () => {
+    const manifestPath = join(tempDir, '.takt', 'takt-package.yaml');
+    expect(() => checkPackageHasContentWithContext(tempDir, {
+      manifestPath,
+      configuredPath: '.',
+    })).toThrow(/path: \.takt/);
+  });
+
   it('should not throw when only faceted/ exists', () => {
     // Given: package with faceted/ only
     mkdirSync(join(tempDir, 'faceted'), { recursive: true });

src/commands/ensemble/add.ts

@@ -10,6 +10,7 @@ import { mkdirSync, copyFileSync, existsSync, readFileSync, writeFileSync, rmSyn
 import { join, dirname } from 'node:path';
 import { tmpdir } from 'node:os';
 import { execFileSync } from 'node:child_process';
+import { createRequire } from 'node:module';
 import { stringify as stringifyYaml } from 'yaml';
 import { getEnsemblePackageDir } from '../../infra/config/paths.js';
 import { parseGithubSpec } from '../../features/ensemble/github-spec.js';
@@ -18,7 +19,7 @@ import {
   validateTaktPackPath,
   validateMinVersion,
   isVersionCompatible,
-  checkPackageHasContent,
+  checkPackageHasContentWithContext,
   validateRealpathInsideRoot,
   resolvePackConfigPath,
 } from '../../features/ensemble/takt-pack-config.js';
@@ -33,7 +34,7 @@ import { confirm } from '../../shared/prompt/index.js';
 import { info, success } from '../../shared/ui/index.js';
 import { createLogger, getErrorMessage } from '../../shared/utils/index.js';
 
-// eslint-disable-next-line @typescript-eslint/no-require-imports
+const require = createRequire(import.meta.url);
 const { version: TAKT_VERSION } = require('../../../package.json') as { version: string };
 
 const log = createLogger('ensemble-add');
@@ -63,16 +64,15 @@ export async function ensembleAddCommand(spec: string): Promise<void> {
     mkdirSync(tmpExtractDir, { recursive: true });
 
     info(`📦 ${owner}/${repo} @${ref} をダウンロード中...`);
-    execFileSync(
+    const tarballBuffer = execFileSync(
       'gh',
       [
         'api',
         `/repos/${owner}/${repo}/tarball/${ref}`,
-        '--header', 'Accept: application/octet-stream',
-        '--output', tmpTarPath,
       ],
       { stdio: ['inherit', 'pipe', 'pipe'] },
     );
+    writeFileSync(tmpTarPath, tarballBuffer);
 
     const tarVerboseList = execFileSync('tar', ['tvzf', tmpTarPath], {
       encoding: 'utf-8',
@@ -112,7 +112,10 @@ export async function ensembleAddCommand(spec: string): Promise<void> {
 
     validateRealpathInsideRoot(packageRoot, tmpExtractDir);
 
-    checkPackageHasContent(packageRoot);
+    checkPackageHasContentWithContext(packageRoot, {
+      manifestPath: packConfigPath,
+      configuredPath: config.path,
+    });
 
     const targets = collectCopyTargets(packageRoot);
     const facetFiles = targets.filter(t => t.relativePath.startsWith('faceted/'));

src/features/ensemble/takt-pack-config.ts

@@ -23,6 +23,11 @@ export interface TaktPackConfig {
   };
 }
 
+interface PackageContentCheckContext {
+  manifestPath?: string;
+  configuredPath?: string;
+}
+
 const SEMVER_PATTERN = /^\d+\.\d+\.\d+$/;
 
 /**
@@ -113,6 +118,41 @@ export function checkPackageHasContent(packageRoot: string): void {
   }
 }
 
+/**
+ * Check package content and include user-facing diagnostics when empty.
+ *
+ * Adds manifest/configured-path details and a practical hint for nested layouts
+ * (e.g. when actual content is under ".takt/" but path remains ".").
+ */
+export function checkPackageHasContentWithContext(
+  packageRoot: string,
+  context: PackageContentCheckContext,
+): void {
+  const hasFaceted = existsSync(join(packageRoot, 'faceted'));
+  const hasPieces = existsSync(join(packageRoot, 'pieces'));
+  if (hasFaceted || hasPieces) return;
+
+  const checkedFaceted = join(packageRoot, 'faceted');
+  const checkedPieces = join(packageRoot, 'pieces');
+  const configuredPath = context.configuredPath ?? '.';
+  const manifestPath = context.manifestPath ?? '(unknown)';
+  const hint = configuredPath === '.'
+    ? `hint: If your package content is under ".takt/", set "path: .takt" in ${TAKT_PACKAGE_MANIFEST_FILENAME}.`
+    : `hint: Verify "path: ${configuredPath}" points to a directory containing faceted/ or pieces/.`;
+
+  throw new Error(
+    [
+      'Package content not found.',
+      `manifest: ${manifestPath}`,
+      `configured path: ${configuredPath}`,
+      `resolved package root: ${packageRoot}`,
+      `checked: ${checkedFaceted}`,
+      `checked: ${checkedPieces}`,
+      hint,
+    ].join('\n'),
+  );
+}
+
 /**
  * Resolve the path to takt-package.yaml within an extracted tarball directory.
  *