chore: remove the ccg index command (subset of ccg docs)

`ccg index` only regenerated index.md — exactly what `ccg docs` already writes
as part of full generation. The dedicated command duplicated a slice of docs
generation with no unique capability.

- delete internal/cli/index.go (+ index_test.go) and its root.go registration
- remove the now-unused docs.Generator.RunIndex (writeIndex/validateDocGroups
  stay — still used by Generator.Run)
- migrate the two integration-test steps that ran `index` to `docs` (which also
  writes index.md, so the index.md assertions still hold)
- sweep CLI-reference / namespace-migration / skills docs

Verified with the real binary: `ccg index` is gone (unknown command) and
`ccg docs` writes index.md.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: tae2089

.claude/skills/ccg-docs/SKILL.md

@@ -12,7 +12,6 @@ Generate Markdown documentation from code graphs, build RAG indexes for AI consu
 | Command | Description | Example |
 |---------|-------------|---------|
 | `docs [--out dir]` | Generate Markdown documentation | `ccg docs --out docs` |
-| `index [--out dir]` | Regenerate index.md only | `ccg index` |
 | `lint [--out dir]` | 8-category docs lint | `ccg lint` |
 | `lint --strict` | Exit 1 on issues (for CI/pre-commit) | `ccg lint --strict` |
 | `hooks install` | Install pre-commit git hook | `ccg hooks install` |

guide/cli-reference.md

@@ -50,7 +50,6 @@ ccg update ./backend --namespace backend
 | `ccg docs --rag-index-dir <dir>` | Override the `doc-index.json` and `wiki-index.json` output directory (default `.ccg` or `rag.index_dir`) |
 | `ccg docs --prune=false` | Regenerate docs without deleting older generator-managed files |
 | `ccg docs --exclude <pat>` | Exclude files/paths from generated docs (repeatable) |
-| `ccg index [--out dir]` | Regenerate `index.md` only |
 | `ccg rag-index [--out dir]` | Rebuild RAG index from generated docs and already-computed community structure |
 | `ccg languages` | List supported languages and extensions |
 | `ccg example [language]` | Show annotation writing example |

guide/ko/cli-reference.md

@@ -52,7 +52,6 @@ ccg update ./backend --namespace backend
 | `ccg docs --rag-index-dir <dir>` | `doc-index.json` 및 `wiki-index.json` 출력 디렉터리 지정 (기본 `.ccg` 또는 `rag.index_dir`) |
 | `ccg docs --prune=false` | 기존 generator-managed 문서를 삭제하지 않고 문서만 다시 생성 |
 | `ccg docs --exclude <pat>` | 문서 생성 대상에서 파일/경로 제외 (반복 가능) |
-| `ccg index [--out dir]` | `index.md`만 재생성 |
 | `ccg rag-index [--out dir]` | 생성된 문서와 이미 계산된 커뮤니티 구조 기반 RAG 인덱스 재생성 |
 | `ccg languages` | 지원되는 언어 및 확장자 목록 출력 |
 | `ccg example [language]` | 어노테이션 작성 예시 출력 |

guide/ko/namespace-migration.md

@@ -15,7 +15,6 @@ CLI와 MCP 도구 간의 일관성을 높이기 위해 기본 네임스페이스
 네임스페이스를 지정하지 않았을 때 모든 네임스페이스를 스캔하던 암시적인 동작이 다음 경로에서 제거되었습니다:
 - `status`
 - `docs`
-- `index`
 - `lint`
 - `eval`
 - 모든 MCP 관련 도구 경로

guide/namespace-migration.md

@@ -13,7 +13,6 @@ The default namespace is now literally `"default"`. Previously, an unset namespa
 Implicit whole-database reads (scanning all namespaces when none is specified) have been removed from the following paths:
 - `status`
 - `docs`
-- `index`
 - `lint`
 - `eval`
 - All MCP-related tool paths

internal/cli/index.go

@@ -105,8 +105,8 @@ func Lib() {}
 	// Index with exclusion
 	outDir := t.TempDir()
 	stdout.Reset()
-	if err := executeCmd(deps, stdout, stderr, "index", "--out", outDir, "--exclude", "vendor"); err != nil {
-		t.Fatalf("index: %v", err)
+	if err := executeCmd(deps, stdout, stderr, "docs", "--out", outDir, "--exclude", "vendor"); err != nil {
+		t.Fatalf("docs: %v", err)
 	}
 
 	content, err := os.ReadFile(filepath.Join(outDir, "index.md"))
@@ -145,8 +145,8 @@ func Inner() {}
 
 	outDir := t.TempDir()
 	stdout.Reset()
-	if err := executeCmd(deps, stdout, stderr, "index", "--out", outDir); err != nil {
-		t.Fatalf("index: %v", err)
+	if err := executeCmd(deps, stdout, stderr, "docs", "--out", outDir); err != nil {
+		t.Fatalf("docs: %v", err)
 	}
 
 	content, err := os.ReadFile(filepath.Join(outDir, "index.md"))

internal/cli/index_test.go

@@ -158,7 +158,6 @@ func NewRootCmd(deps *Deps) *cobra.Command {
 		newExampleCmd(deps),
 		newTagsCmd(deps),
 		newHooksCmd(deps),
-		newIndexCmd(deps),
 		newLintCmd(deps),
 		newVersionCmd(deps),
 	)

internal/cli/integration_test.go

@@ -83,32 +83,6 @@ func (g *Generator) Run() error {
 	return errors.Join(errs...)
 }
 
-// RunIndex regenerates only index.md without rewriting per-file docs.
-// @intent 개별 문서를 유지한 채 파일 인덱스만 빠르게 갱신한다.
-// @sideEffect 출력 디렉터리의 index.md를 다시 기록한다.
-func (g *Generator) RunIndex() error {
-	nodes, annByID, err := g.loadNodes()
-	if err != nil {
-		return fmt.Errorf("load nodes: %w", err)
-	}
-
-	if len(g.Exclude) > 0 {
-		filtered := nodes[:0]
-		for _, n := range nodes {
-			if !pathutil.MatchExcludes(g.Exclude, n.FilePath) {
-				filtered = append(filtered, n)
-			}
-		}
-		nodes = filtered
-	}
-
-	groups := groupByFile(nodes, annByID, nil)
-	if err := g.validateDocGroups(groups); err != nil {
-		return err
-	}
-	return g.writeIndex(groups)
-}
-
 // validateDocGroups checks that every group's output path is safe before writing begins.
 // @intent prevent path-traversal writes before any file I/O is attempted
 func (g *Generator) validateDocGroups(groups []nodeGroup) error {