Merge pull request 'feat: v0.17.0 PR-B — C typedef-wrapped struct/enum/union → typedef alias unit' (#160) from feat/c-typedef-struct-unit into main

Reviewed-on: #160

crates/kebab-app/src/lib.rs

@@ -880,6 +880,22 @@ fn try_skip_unchanged(
     //    logic self-documenting and guards against future id_for_doc
     //    changes.
     if existing_doc.parser_version != *current_parser_version {
+        // v0.17.0 PR-B: parser_version bump cascade. Same bytes (same
+        // asset_id) → asset-keyed `stale_chunk_ids_at` is a no-op, but
+        // the stale `documents` row at this workspace_path still
+        // collides with `idx_docs_workspace_path` on the next INSERT
+        // and the LanceDB rows under the old chunk_ids orphan. Sweep
+        // both stores here, before returning Ok(None), so the caller's
+        // full-ingest path lands a clean slate. The `keep_doc_id = ""`
+        // sentinel removes every doc at this path (the new doc_id is
+        // not yet known here — it's computed downstream from the new
+        // PARSER_VERSION).
+        purge_workspace_path_for_parser_bump(app, asset).with_context(|| {
+            format!(
+                "parser-bump orphan purge at {}",
+                asset.workspace_path.0
+            )
+        })?;
         return Ok(None);
     }
     // 3. Chunker unchanged.
@@ -1486,6 +1502,53 @@ fn record_image_analysis_failure(
     warning_notes.push(note);
 }
 
+/// v0.17.0 PR-B: parser-bump cascade. When a code extractor ships a
+/// new `PARSER_VERSION` (e.g. `code-c-v1` → `code-c-v2`), the same
+/// (workspace_path, asset_id) pair re-emerges with a fresh `doc_id`.
+/// The existing asset-keyed [`purge_vector_orphans_for_workspace_path`]
+/// only fires on asset_id changes (file bytes edited) and is a no-op
+/// here. Without an explicit doc-keyed sweep the next INSERT raises
+/// `idx_docs_workspace_path` UNIQUE and the LanceDB rows under the
+/// stale chunk_ids orphan. This helper:
+///
+/// 1. Fetches every stale chunk_id at `workspace_path` from SQLite
+///    (`keep_doc_id = ""` means "all existing docs are stale" —
+///    `try_skip_unchanged` calls this before the new doc_id is
+///    computed).
+/// 2. Deletes the matching vectors from every Lance table (no-op if
+///    embeddings are disabled).
+/// 3. Sweeps the SQLite `documents` row (CASCADE drops `blocks` /
+///    `chunks` / `embedding_records`). The `assets` row stays — same
+///    bytes, same asset_id, only the derived `doc_id` changed.
+fn purge_workspace_path_for_parser_bump(
+    app: &App,
+    asset: &RawAsset,
+) -> anyhow::Result<()> {
+    let path = &asset.workspace_path.0;
+    let stale = app
+        .sqlite
+        .stale_chunk_ids_for_workspace_path_except_doc_id(path, "")
+        .context("SqliteStore::stale_chunk_ids_for_workspace_path_except_doc_id")?;
+    if !stale.is_empty() {
+        if let Some(vec_store) = app.vector().context("App::vector")? {
+            use kebab_core::VectorStore as _;
+            vec_store
+                .delete_by_chunk_ids(&stale)
+                .context("VectorStore::delete_by_chunk_ids (parser-bump orphans)")?;
+        }
+    }
+    app.sqlite
+        .purge_document_at_workspace_path_except_doc_id(path, "")
+        .context("SqliteStore::purge_document_at_workspace_path_except_doc_id")?;
+    tracing::debug!(
+        target: "kebab-app",
+        path = %path,
+        count = stale.len(),
+        "purged orphan vectors + document for parser_version bump"
+    );
+    Ok(())
+}
+
 /// HOTFIXES 2026-05-02 P7-3 follow-up: when a tracked file's bytes
 /// change, `purge_orphan_at_workspace_path` (in `kebab-store-sqlite`)
 /// sweeps the SQLite chain (documents → blocks / chunks / embedding_records)

crates/kebab-app/tests/code_ingest_smoke.rs

@@ -1145,8 +1145,8 @@ fn tier1_c_ingest_searchable() {
         .expect("parser.c item present");
     assert_eq!(
         c_item.parser_version.as_ref().map(|p| p.0.as_str()),
-        Some("code-c-v1"),
-        "parser_version must be code-c-v1"
+        Some("code-c-v2"),
+        "parser_version must be code-c-v2 (v0.17.0 PR-B: typedef-wrapped struct/enum/union 이 typedef alias unit 으로 방출)"
     );
     assert_eq!(
         c_item.chunker_version.as_ref().map(|c| c.0.as_str()),

crates/kebab-parse-code/src/c.rs

@@ -31,7 +31,7 @@ use time::OffsetDateTime;
 
 use crate::scaffold::{filename_from_workspace_path, strip_extension};
 
-pub const PARSER_VERSION: &str = "code-c-v1";
+pub const PARSER_VERSION: &str = "code-c-v2";
 
 /// C AST extractor. Per-unit blocks via tree-sitter-c 0.24.2
 /// (`LANGUAGE: LanguageFn`) parsed by tree-sitter 0.26.
@@ -257,13 +257,33 @@ fn build_blocks(
                     flush_glue(&mut glue, &mut units);
                     units.push((name.to_string(), s, e, true));
                 } else {
-                    // Anonymous struct/enum/union — glue.
+                    // Anonymous struct/enum/union at the top level (not
+                    // wrapped in typedef) — glue. typedef-wrapped case
+                    // is recovered in the `type_definition` arm below.
                     glue.push((s, e));
                 }
             }
-            // Everything else: preprocessor directives, declarations
-            // (typedef / global var / fn prototype), type_definition,
-            // linkage_specification, etc. — all collapse into glue.
+            "type_definition" => {
+                // v0.17.0 PR-B: typedef-wrapped anonymous aggregate
+                // recovery. `typedef struct { ... } Foo;` exposes only
+                // the alias `Foo` as a useful symbol — the inner
+                // struct_specifier has no `name` field. Pre-v0.17.0
+                // this whole construct collapsed into glue and hid the
+                // alias from search (HOTFIXES 2026-05-21). v2 recovers
+                // the alias from the `declarator` field and emits a
+                // synthetic unit so `Citation::Code.symbol = "Foo"`.
+                // Plain `typedef int MyInt;` (no inner aggregate) stays
+                // glue — there's no struct body to name.
+                if let Some(name) = recover_typedef_alias(child, source) {
+                    flush_glue(&mut glue, &mut units);
+                    units.push((name, s, e, true));
+                } else {
+                    glue.push((s, e));
+                }
+            }
+            // Everything else: preprocessor directives, plain declarations
+            // (global var / fn prototype), linkage_specification, etc.
+            // — all collapse into glue.
             _ => {
                 glue.push((s, e));
             }
@@ -323,6 +343,62 @@ fn build_blocks(
     Ok(blocks)
 }
 
+/// v0.17.0 PR-B: try to recover the typedef alias name from a
+/// `type_definition` node *iff* the inner type-specifier is an
+/// anonymous struct/enum/union. Returns `None` for any other shape
+/// (named aggregate handled elsewhere, plain type alias has no body
+/// worth naming).
+fn recover_typedef_alias(node: tree_sitter::Node, source: &str) -> Option<String> {
+    let mut has_anon_aggregate = false;
+    let mut cursor = node.walk();
+    for sub in node.children(&mut cursor) {
+        match sub.kind() {
+            "struct_specifier" | "enum_specifier" | "union_specifier" => {
+                if sub.child_by_field_name("name").is_none() {
+                    has_anon_aggregate = true;
+                } else {
+                    // Named inner aggregate (e.g. `typedef struct Pt {...} P;`)
+                    // — the named struct itself is the primary symbol and
+                    // is *not* extracted at the top level today (it lives
+                    // inside `type_definition`, not as a sibling
+                    // `struct_specifier`). For v2 we keep behavior conservative:
+                    // return None so the type_definition stays glue, matching
+                    // pre-v2 behavior for this minor case. Real-world C tends
+                    // to use one of: bare named struct, typedef alias only,
+                    // or typedef on anonymous body — the latter is what we fix.
+                    return None;
+                }
+            }
+            _ => {}
+        }
+    }
+    if !has_anon_aggregate {
+        return None;
+    }
+    let decl = node.child_by_field_name("declarator")?;
+    extract_typedef_alias_name(decl, source).map(str::to_string)
+}
+
+/// Extract the typedef alias identifier from a declarator subtree.
+/// Handles the common shapes: direct `type_identifier`, or one wrapped
+/// in pointer / function declarator nodes (the alias is always the
+/// rightmost `type_identifier` descendant).
+fn extract_typedef_alias_name<'a>(
+    decl: tree_sitter::Node,
+    source: &'a str,
+) -> Option<&'a str> {
+    if decl.kind() == "type_identifier" {
+        return Some(&source[decl.start_byte()..decl.end_byte()]);
+    }
+    let mut cursor = decl.walk();
+    for sub in decl.children(&mut cursor) {
+        if let Some(found) = extract_typedef_alias_name(sub, source) {
+            return Some(found);
+        }
+    }
+    None
+}
+
 fn flush_glue(glue: &mut Vec<(u32, u32)>, units: &mut Vec<(String, u32, u32, bool)>) {
     if glue.is_empty() {
         return;
@@ -489,20 +565,72 @@ mod tests {
     }
 
     #[test]
-    fn c_extractor_typedef_struct_falls_into_glue() {
-        // typedef struct { ... } Foo; — inner struct_specifier is anonymous,
-        // outer node is type_definition → glue. See HOTFIXES.md 2026-05-21.
+    fn c_extractor_typedef_struct_emits_unit() {
+        // v0.17.0 PR-B: `typedef struct { ... } Foo;` was previously a
+        // hotfix-tracked deviation (HOTFIXES.md 2026-05-21) — the inner
+        // struct_specifier is anonymous so the named-struct arm didn't
+        // fire, dropping the whole construct into glue and hiding the
+        // `Foo` alias from symbol search. The v2 extractor recovers the
+        // typedef alias from the `declarator` field on the
+        // `type_definition` node and emits a synthetic unit with that
+        // name. parser_version bumped `code-c-v1` → `code-c-v2`.
         let src = "typedef struct { int x; int y; } Point;\n";
         let doc = tests_support::extract_c(src, "x/typedef.c");
         let s = syms(&doc);
+        // The typedef alias surfaces as a Code symbol.
+        assert!(
+            s.iter().any(|x| x == "Point"),
+            "expected 'Point' unit from typedef alias: {s:?}"
+        );
+        // No `<module>` (the file has exactly one semantic unit now,
+        // the typedef alias — no glue-only fallback needed).
+        assert!(
+            !s.iter().any(|x| x == "<module>"),
+            "no <module> fallback expected when typedef emits a unit: {s:?}"
+        );
+    }
+
+    #[test]
+    fn c_extractor_typedef_enum_emits_unit() {
+        // Parallel coverage for enum_specifier — same typedef-alias
+        // synthesis path. `typedef enum { A, B } Color;` → unit `Color`.
+        let src = "typedef enum { A, B } Color;\n";
+        let doc = tests_support::extract_c(src, "x/typedef_enum.c");
+        let s = syms(&doc);
+        assert!(
+            s.iter().any(|x| x == "Color"),
+            "expected 'Color' unit from typedef enum alias: {s:?}"
+        );
+    }
+
+    #[test]
+    fn c_extractor_typedef_union_emits_unit() {
+        // Parallel coverage for union_specifier.
+        let src = "typedef union { int i; float f; } IntOrFloat;\n";
+        let doc = tests_support::extract_c(src, "x/typedef_union.c");
+        let s = syms(&doc);
+        assert!(
+            s.iter().any(|x| x == "IntOrFloat"),
+            "expected 'IntOrFloat' unit from typedef union alias: {s:?}"
+        );
+    }
+
+    #[test]
+    fn c_extractor_typedef_to_existing_type_stays_glue() {
+        // Negative case: `typedef int MyInt;` has no inner struct/enum/
+        // union — there's no struct body to attach the alias to, so the
+        // construct falls into glue (becomes `<module>` when alone).
+        // Confirms the new arm only fires for anonymous-struct typedef.
+        let src = "typedef int MyInt;\n";
+        let doc = tests_support::extract_c(src, "x/typedef_alias.c");
+        let s = syms(&doc);
         assert!(
             s.iter().any(|x| x == "<module>"),
-            "expected <module> for typedef struct: {s:?}"
+            "expected <module> for plain typedef alias: {s:?}"
         );
-        // The typedef alias should NOT surface as a Code symbol
         assert!(
-            !s.iter().any(|x| x == "Point"),
-            "unexpected 'Point' unit for typedef struct: {s:?}"
+            !s.iter().any(|x| x == "MyInt"),
+            "plain typedef alias must not emit a unit: {s:?}"
         );
     }
 

crates/kebab-store-sqlite/src/store.rs

@@ -464,6 +464,74 @@ impl SqliteStore {
         }
         Ok(out)
     }
+
+    /// v0.17.0 PR-B: sister of [`Self::stale_chunk_ids_at`] for the
+    /// `parser_version` bump cascade. When `doc_id` depends on
+    /// `parser_version` (design §9) and an extractor ships a new
+    /// `PARSER_VERSION`, the next ingest computes a fresh `doc_id` for
+    /// the *same* `(workspace_path, asset_id)` pair. The existing
+    /// asset_id-keyed [`Self::stale_chunk_ids_at`] does NOT fire (same
+    /// asset), so the legacy `chunks` rows and their LanceDB shadows
+    /// would orphan. This helper queries by `workspace_path` instead,
+    /// excluding the freshly-computed `keep_doc_id` so a re-entry
+    /// during the same ingest doesn't re-sweep the new row.
+    ///
+    /// Caller usage: pass the *new* `doc_id` if known; pass an empty
+    /// string when called before the new INSERT (the case in
+    /// `try_skip_unchanged`) — all existing docs at `workspace_path`
+    /// are then collected as stale.
+    pub fn stale_chunk_ids_for_workspace_path_except_doc_id(
+        &self,
+        workspace_path: &str,
+        keep_doc_id: &str,
+    ) -> Result<Vec<kebab_core::ChunkId>> {
+        let conn = self.lock_conn();
+        let mut stmt = conn
+            .prepare(
+                "SELECT c.chunk_id
+                 FROM chunks c
+                 INNER JOIN documents d ON c.doc_id = d.doc_id
+                 WHERE d.workspace_path = ?1 AND d.doc_id != ?2",
+            )
+            .map_err(StoreError::from)?;
+        let rows = stmt
+            .query_map(params![workspace_path, keep_doc_id], |row| {
+                row.get::<_, String>(0)
+            })
+            .map_err(StoreError::from)?;
+        let mut out: Vec<kebab_core::ChunkId> = Vec::new();
+        for row in rows {
+            let id = row.map_err(StoreError::from)?;
+            out.push(kebab_core::ChunkId(id));
+        }
+        Ok(out)
+    }
+
+    /// v0.17.0 PR-B: sweep the SQLite document chain (`documents` →
+    /// `blocks` / `chunks` / `embedding_records` via CASCADE) for every
+    /// row at `workspace_path` whose `doc_id` differs from `keep_doc_id`.
+    /// Pair with [`Self::stale_chunk_ids_for_workspace_path_except_doc_id`]
+    /// — caller fetches the chunk_ids first, hands them to
+    /// `VectorStore::delete_by_chunk_ids`, then calls this sweep.
+    /// `assets` row is preserved (same bytes, same asset_id — only the
+    /// derived `doc_id` changed).
+    ///
+    /// `keep_doc_id = ""` deletes every doc at `workspace_path`
+    /// (semantics mirror the sister helper above — used by
+    /// `try_skip_unchanged` before the new INSERT exists).
+    pub fn purge_document_at_workspace_path_except_doc_id(
+        &self,
+        workspace_path: &str,
+        keep_doc_id: &str,
+    ) -> Result<()> {
+        let conn = self.lock_conn();
+        conn.execute(
+            "DELETE FROM documents WHERE workspace_path = ?1 AND doc_id != ?2",
+            params![workspace_path, keep_doc_id],
+        )
+        .map_err(StoreError::from)?;
+        Ok(())
+    }
 }
 
 /// Sweep stale `assets` + `documents` + downstream rows when the file

tasks/HOTFIXES.md

@@ -64,6 +64,20 @@ multi-root 도그푸딩(2026-05-20)에서 관찰한 본문 vs 테스트 / glue c
 
 Cross-link: `tasks/p10/INDEX.md`, `migrations/V002__fts.sql`, design §5.5 / §3.5.
 
+## 2026-05-24 — v0.17.0 PR-B: C typedef-wrapped struct/enum/union 이 typedef alias unit 으로 방출 (closure of 2026-05-21)
+
+`crates/kebab-parse-code/src/c.rs::extract_blocks` 에 `type_definition` 분기 추가. 내부 anonymous `struct_specifier` / `enum_specifier` / `union_specifier` (name field 없음) 인 typedef 일 때 declarator 의 typedef alias identifier 를 추출해 synthetic unit 방출. named inner aggregate (`typedef struct Pt { ... } P;`) 와 plain alias (`typedef int MyInt;`) 는 기존대로 glue (top-level typedef-wrapped anonymous aggregate 만 v2 의 1차 범위).
+
+**parser_version cascade**: `PARSER_VERSION` `code-c-v1` → `code-c-v2` bump. design §9 — `doc_id = (workspace_path, asset_id, parser_version)`. 같은 file (asset_id 불변) + 새 parser_version → 새 doc_id. 즉 같은 workspace_path 에 옛 doc_id 와 새 doc_id 가 동시 INSERT 시도 → `idx_docs_workspace_path` UNIQUE 충돌.
+
+**Same-workspace_path orphan purge (B1 Step 5b)**: `crates/kebab-store-sqlite/src/store.rs` 에 두 helper 신규 — `stale_chunk_ids_for_workspace_path_except_doc_id(workspace_path, keep_doc_id)` (chunk_ids 수집) + `purge_document_at_workspace_path_except_doc_id(workspace_path, keep_doc_id)` (CASCADE document/chunks 제거). `crates/kebab-app/src/lib.rs::try_skip_unchanged` 의 parser_mismatch 분기에서 `purge_workspace_path_for_parser_bump` wrapper 호출 → 옛 chunk_ids 의 LanceDB orphan 도 `delete_by_chunk_ids` 로 정리 후 SQLite document row 제거 → 이후 `Ok(None)` 반환 → caller 가 새 doc_id 로 INSERT. 기존 `purge_orphan_at_workspace_path` (asset_id 변경 케이스) 는 그대로 — bytes 변경 경로 회귀 없음.
+
+**사용자 영향**: 기존 v0.16.x KB 의 C 파일은 v0.17.0 binary 로 다음 ingest 시 자동 재처리 (parser_version mismatch → cleanup → 새 doc). 명시적 re-ingest 명령 불필요 (다음 `kebab ingest` 가 자연스럽게 처리). `typedef struct {...} Foo;` 가 `Citation::Code.symbol = "Foo"` 로 search 에 노출.
+
+**미해결 (Risks)**: nested typedef (`typedef struct { struct {...} inner; } Outer;`) 의 inner 익명 struct 는 여전히 glue — v2 의 1차 범위는 top-level typedef alias 만.
+
+Cross-link: `crates/kebab-parse-code/src/c.rs::recover_typedef_alias`, `tasks/p10/p10-1d-c-cpp-ast-chunker.md` Risks/notes section.
+
 ## 2026-05-21 — p10-2: k8s multi-resource YAML chunk_id collision
 
 **Origin**: P10 종합 도그푸딩 (`/tmp/kebab-p10-dogfood/`, 16 파일). 한 파일에 2+ k8s document (Deployment + Service, `---` 구분) 인 YAML 이 ingest 실패.
@@ -84,11 +98,11 @@ Cross-link: `tasks/p10/p10-2-tier2-resource-aware.md` Risks/notes section.
 
 **Symptom**: `typedef struct { ... } Foo;` in a `.c` file does NOT emit a struct-level unit. tree-sitter-c classifies the construct as a top-level `type_definition` with an *anonymous* inner `struct_specifier` (no `name` field), so the extractor's `struct_specifier` arm doesn't fire — the whole declaration falls into `<top-level>` glue. The named typedef alias `Foo` is therefore not searchable as a symbol.
 
-**Status**: Consistent with spec p10-1d-c-cpp-ast-chunker.md's Risks/notes ("Anonymous union / struct … anonymous → glue"), but the spec's main body line 22 ("struct_specifier (named, top-level) → 1 unit") suggests this idiom WOULD emit. Tension noted, not yet fixed.
+**Status**: ✅ closed — v0.17.0 (2026-05-24) PR-B 에서 extractor 의 `type_definition` 분기 추가로 해소. 영향은 위 2026-05-24 PR-B 절 참조. 이하는 closure 전 round-2 dogfood 관찰 기록 (frozen).
 
-**Workaround**: search the struct by its field/function names, or use `--code-lang c` to broaden scope. Typedef-aliased struct names won't surface as `Citation::Code.symbol`.
+**Workaround (pre-v0.17.0)**: search the struct by its field/function names, or use `--code-lang c` to broaden scope. Typedef-aliased struct names won't surface as `Citation::Code.symbol`.
 
-**Next step**: dogfood real C code for a week+; if this turns out to be a frequent pain point (kernel-style code, libuv, etc.), revisit the extractor to detect `type_definition` → inner `struct_specifier` and emit a synthetic unit named after the typedef alias.
+**Resolution (v0.17.0)**: extractor 가 top-level `type_definition` 노드를 만나 내부 anonymous `struct_specifier` / `enum_specifier` / `union_specifier` 가 있으면 `declarator` field 의 typedef alias 이름으로 synthetic unit 방출. `PARSER_VERSION` `code-c-v1` → `code-c-v2` bump. design §9 cascade 동작 — 같은 `(workspace_path, asset_id)` 의 `doc_id` 가 새 parser_version 으로 다르게 계산됨. 옛 doc/chunks row + LanceDB orphan 회피용 same-workspace_path orphan purge helper 동반 (`stale_chunk_ids_for_workspace_path_except_doc_id` + `purge_document_at_workspace_path_except_doc_id`).
 
 Cross-link: `tasks/p10/p10-1d-c-cpp-ast-chunker.md` Risks/notes section.
 

tasks/p10/p10-1d-c-cpp-ast-chunker.md

@@ -113,7 +113,7 @@ crates/kebab-parse-code/Cargo.toml  [edit] — 위 2 dep 신규 entry.
 - **Template specialization** (`template<> class Foo<int>`): tree-sitter-cpp 의 `template_declaration` 안의 `class_specifier` name 만 추출 — `Foo` 만 symbol 에 들어가고 `<int>` 미포함. design 의 generic 무시 룰 일관.
 - **`extern "C"` block 안의 fn**: 일반 fn 처리. 외부 wrapping block 은 glue.
 - **Anonymous union / struct** (`struct { int x; }` 변수 안에): 흔치 않음 + named 만 unit. anonymous 는 glue.
-- **typedef-wrapped struct/enum idiom** (`typedef struct { ... } Foo;`) — anonymous inner struct → glue. Named typedef alias 미캡처. dogfood 후 HOTFIXES 검토. See [HOTFIXES.md 2026-05-21 entry](../HOTFIXES.md).
+- **typedef-wrapped struct/enum idiom** (`typedef struct { ... } Foo;`) — ✅ v0.17.0 (2026-05-24) PR-B 에서 해소. extractor 의 `type_definition` 분기가 inner anonymous `struct_specifier` / `enum_specifier` / `union_specifier` 를 탐지해 declarator 의 typedef alias 이름으로 synthetic unit 방출. `PARSER_VERSION` `code-c-v1` → `code-c-v2` bump + same-workspace_path orphan purge cascade 동반. **잔여 미해결**: nested typedef (`typedef struct { struct {...} inner; } Outer;`) 의 inner 익명 struct 는 여전히 glue — v2 의 1차 범위는 top-level typedef alias 만. See [HOTFIXES.md 2026-05-21 entry](../HOTFIXES.md) (frozen 관찰) + 2026-05-24 closure entry.
 - **Macro-heavy code** (Linux kernel 등): `#define FOO(x) ...` 매크로가 function-like 라도 parser 가 fn 으로 인식 안 함. preprocessor glue 로 처리 — symbol 안 잡힘. 의도된 동작 (parser 의 macro expansion 안 함).
 - **`__attribute__((...))`** annotations: tree-sitter-c 의 attribute 노드는 declarator 옆 sibling. 무시 가능. function name 추출에 영향 없음.
 - **fixture 크기**: sample.c 는 ~30 line (top-level fn + struct + enum + preprocessor), sample.cpp 는 ~50 line (nested namespace + class + method + template + free fn). oversize fallback 의 별도 검증은 1A-2 의 long_section_snapshot 패턴이 이미 cover (필요 시 별도 fixture).