fix: clarify configure-ecc skill copy roots

docs/ja-JP/skills/configure-ecc/SKILL.md

@@ -130,9 +130,20 @@ Options:
 
 ### 2c: インストールの実行
 
-選択された各スキルについて、スキルディレクトリ全体をコピーします：
+選択された各スキルについて、正しいソースルートからスキルディレクトリ全体をコピーします：
+
 ```bash
-cp -r $ECC_ROOT/skills/<skill-name> $TARGET/skills/
+# ステップ 2a で選択したコアスキルは .agents/skills/ 配下にあります
+cp -R "$ECC_ROOT/.agents/skills/<skill-name>" "$TARGET/skills/"
+
+# ステップ 2b/2c で選択したニッチスキルは skills/ 配下にあります
+cp -R "$ECC_ROOT/skills/<skill-name>" "$TARGET/skills/"
+```
+
+glob で取得したソースディレクトリを処理するときは、trailing slash 付きのソースをそのまま `cp` に渡さないでください。宛先名にディレクトリ名を明示します：
+
+```bash
+cp -R "${src%/}" "$TARGET/skills/$(basename "${src%/}")"
 ```
 
 注: `continuous-learning` と `continuous-learning-v2` には追加ファイル（config.json、フック、スクリプト）があります — SKILL.md だけでなく、ディレクトリ全体がコピーされることを確認してください。

docs/zh-CN/skills/configure-ecc/SKILL.md

@@ -199,10 +199,20 @@ mkdir -p $TARGET/skills $TARGET/rules
 
 ### 2d: 执行安装
 
-对于每个选定的技能，复制整个技能目录：
+对于每个选定的技能，请从正确的源目录复制整个技能目录：
 
 ```bash
-cp -r $ECC_ROOT/skills/<skill-name> $TARGET/skills/
+# 步骤 2a 选中的核心技能位于 .agents/skills/
+cp -R "$ECC_ROOT/.agents/skills/<skill-name>" "$TARGET/skills/"
+
+# 步骤 2b/2c 选中的细分技能位于 skills/
+cp -R "$ECC_ROOT/skills/<skill-name>" "$TARGET/skills/"
+```
+
+遍历 glob 得到的源目录时，不要把带 trailing slash 的源路径直接传给 `cp`。显式使用目录名作为目标名：
+
+```bash
+cp -R "${src%/}" "$TARGET/skills/$(basename "${src%/}")"
 ```
 
 注意：`continuous-learning` 和 `continuous-learning-v2` 有额外的文件（config.json、钩子、脚本）——确保复制整个目录，而不仅仅是 SKILL.md。

skills/configure-ecc/SKILL.md

@@ -195,9 +195,20 @@ For each selected category, print the full list of skills below and ask the user
 
 ### 2d: Execute Installation
 
-For each selected skill, copy the entire skill directory:
+For each selected skill, copy the entire skill directory from the correct source root:
+
 ```bash
-cp -r $ECC_ROOT/skills/<skill-name> $TARGET/skills/
+# Core skills selected from Step 2a live under .agents/skills/
+cp -R "$ECC_ROOT/.agents/skills/<skill-name>" "$TARGET/skills/"
+
+# Niche skills selected from Step 2b/2c live under skills/
+cp -R "$ECC_ROOT/skills/<skill-name>" "$TARGET/skills/"
+```
+
+When iterating over globbed source directories, never pass a trailing-slash source directly to `cp`. Use the directory path as the destination name explicitly:
+
+```bash
+cp -R "${src%/}" "$TARGET/skills/$(basename "${src%/}")"
 ```
 
 Note: `continuous-learning` and `continuous-learning-v2` have extra files (config.json, hooks, scripts) — ensure the entire directory is copied, not just SKILL.md.

tests/docs/configure-ecc-install-paths.test.js

@@ -0,0 +1,63 @@
+'use strict';
+
+const assert = require('assert');
+const fs = require('fs');
+const path = require('path');
+
+const repoRoot = path.resolve(__dirname, '..', '..');
+
+const configureEccDocs = [
+  'skills/configure-ecc/SKILL.md',
+  'docs/zh-CN/skills/configure-ecc/SKILL.md',
+  'docs/ja-JP/skills/configure-ecc/SKILL.md',
+];
+
+let passed = 0;
+let failed = 0;
+
+function test(name, fn) {
+  try {
+    fn();
+    console.log(`  ✓ ${name}`);
+    passed++;
+  } catch (error) {
+    console.log(`  ✗ ${name}`);
+    console.log(`    Error: ${error.message}`);
+    failed++;
+  }
+}
+
+console.log('\n=== Testing configure-ecc install path guidance ===\n');
+
+for (const relativePath of configureEccDocs) {
+  const content = fs.readFileSync(path.join(repoRoot, relativePath), 'utf8');
+
+  test(`${relativePath} separates core and niche skill source roots`, () => {
+    assert.ok(
+      content.includes('$ECC_ROOT/.agents/skills/<skill-name>'),
+      'Expected configure-ecc to document the core skill source root'
+    );
+    assert.ok(
+      content.includes('$ECC_ROOT/skills/<skill-name>'),
+      'Expected configure-ecc to document the niche skill source root'
+    );
+  });
+
+  test(`${relativePath} documents defensive copy form for trailing slash sources`, () => {
+    assert.ok(
+      content.includes('${src%/}'),
+      'Expected configure-ecc to strip trailing slash before copying'
+    );
+    assert.ok(
+      content.includes('$(basename "${src%/}")'),
+      'Expected configure-ecc to preserve the skill directory name explicitly'
+    );
+  });
+}
+
+if (failed > 0) {
+  console.log(`\nFailed: ${failed}`);
+  process.exit(1);
+}
+
+console.log(`\nPassed: ${passed}`);