refactor(topics): 멀티 에이전트용 지식 재편 — _Common(공통 기본기) + Domain_* 구조
에이전트 8종(대화형/프로그래머 C·S/디자이너/설계자/기획자/QA/PD/PM)에게 [공통 기본 능력 + 롤별 Specialty] 2층으로 지식을 주입하기 위한 재분류. 문서 내용·포맷은 무수정, 폴더 이동만 (6,372개 문서 수 보존 확인). - Topic_Programming → Domain_Programming (내부 구조 보존) - Topic_Graphic → Domain_Design - Topic_Business → Domain_Product - Topic_General → Domain_General - _Common 신설: Math(구 Topic_Math_Specialty), Reasoning(구 General/From_Thinking & Reasoning), Reasoning_Creativity(구 General/From_창의성), Communication(Poetic_Blog_Writing + From_writing) - 타 도메인의 From_* 폴더는 유지 (출처 표기일 뿐, 이미 도메인에 맞게 분류된 문서) - 빈 폴더 정리 (memory/procedures) - 에이전트→폴더 매핑은 workspace의 .astra/agent-knowledge-map.json (9개 에이전트) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Antigravity Agent
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---
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id: wiki-2026-0508-fabric
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title: Fabric
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category: 10_Wiki/Topics
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status: verified
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canonical_id: self
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aliases: [React Native Fabric, Fabric Renderer, RN New Architecture]
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duplicate_of: none
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source_trust_level: A
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confidence_score: 0.9
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verification_status: applied
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tags: [react-native, fabric, renderer, mobile, jsi]
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raw_sources: []
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last_reinforced: 2026-05-10
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github_commit: pending
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tech_stack:
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language: cpp
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framework: react-native
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---
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# Fabric
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## 매 한 줄
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> **"매 Fabric 는 React Native 의 new renderer — JSI 기반 synchronous JS↔native 의 enables"**. 2018-2024 에 incrementally rolled out, RN 0.74+ 에서 default. 매 legacy bridge (async JSON serialization) 의 replace, 매 concurrent React features (Suspense, Transitions) 의 mobile 의 enable.
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## 매 핵심
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### 매 Architecture (vs Old Bridge)
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- **Old bridge**: JS thread ↔ Native thread async JSON messages. Serialize cost, no sync calls, list jank.
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- **Fabric**: JSI (JavaScript Interface) — JS engine (Hermes) 의 C++ HostObjects 의 direct access. Sync calls, shared memory, type-safe via codegen.
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### 매 Components
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- **JSI**: lightweight C++ API for JS engines (Hermes/JSC). 매 binding의 base.
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- **Fabric Renderer (C++)**: shadow tree, layout (Yoga), commit phase. 매 cross-platform.
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- **TurboModules**: lazy-loaded native modules with codegen-typed interface.
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- **Codegen**: TS/Flow types → C++/Java/ObjC native code.
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- **Hermes**: default JS engine (faster startup, lower memory, bytecode).
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### 매 응용
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1. React 18 concurrent features (Suspense, useTransition) on mobile.
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2. Synchronous measure/layout queries.
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3. Type-safe native module bindings.
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4. New Architecture only libs (Reanimated 3, Skia).
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## 💻 패턴
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### Enable New Architecture (RN 0.76+)
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```bash
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# Default ON in 0.76+; explicit:
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# ios/Podfile
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# RCT_NEW_ARCH_ENABLED=1 bundle exec pod install
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# android/gradle.properties
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newArchEnabled=true
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```
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### Spec-driven Native Component (Codegen)
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```ts
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// MyViewNativeComponent.ts
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import type { ViewProps } from 'react-native';
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import type { Int32, WithDefault } from 'react-native/Libraries/Types/CodegenTypes';
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import codegenNativeComponent from 'react-native/Libraries/Utilities/codegenNativeComponent';
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export interface NativeProps extends ViewProps {
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color?: string;
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count?: WithDefault<Int32, 0>;
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}
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export default codegenNativeComponent<NativeProps>('MyView');
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```
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### TurboModule Spec
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```ts
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// NativeCalculator.ts
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import type { TurboModule } from 'react-native';
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import { TurboModuleRegistry } from 'react-native';
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export interface Spec extends TurboModule {
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add(a: number, b: number): number; // SYNC call (impossible on old bridge)
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greet(name: string): Promise<string>;
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}
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export default TurboModuleRegistry.getEnforcing<Spec>('Calculator');
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```
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### iOS TurboModule Implementation
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```objc
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// Calculator.mm
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#import "Calculator.h"
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@implementation Calculator
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RCT_EXPORT_MODULE()
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- (NSNumber *)add:(double)a b:(double)b {
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return @(a + b);
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}
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- (std::shared_ptr<facebook::react::TurboModule>)
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getTurboModule:(const facebook::react::ObjCTurboModule::InitParams &)params {
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return std::make_shared<facebook::react::NativeCalculatorSpecJSI>(params);
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}
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@end
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```
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### JSI Direct Binding (advanced)
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```cpp
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// C++ side
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runtime.global().setProperty(
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runtime, "nativeAdd",
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Function::createFromHostFunction(runtime,
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PropNameID::forAscii(runtime, "nativeAdd"), 2,
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[](Runtime& rt, const Value&, const Value* args, size_t) {
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return Value(args[0].asNumber() + args[1].asNumber());
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}));
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```
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### Concurrent Features on RN
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```jsx
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import { useTransition, Suspense } from 'react';
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function App() {
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const [isPending, startTransition] = useTransition();
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const [query, setQuery] = useState('');
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return (
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<>
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<TextInput onChangeText={(t) => startTransition(() => setQuery(t))} />
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<Suspense fallback={<Spinner />}>
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<Results query={query} />
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</Suspense>
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</>
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);
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}
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```
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## 매 결정 기준
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| 상황 | Approach |
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|---|---|
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| New project (2026) | Fabric default (RN 0.76+) |
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| Legacy app | Migrate incrementally; interop layer |
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| Custom native view | Fabric component + codegen |
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| Sync native call | TurboModule (impossible old) |
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| Heavy animation | Reanimated 3 (Fabric-only) |
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**기본값**: New Architecture ON, Hermes ON, codegen-driven specs.
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## 🔗 Graph
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- 부모: [[React Native]] · [[React]]
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- 변형: [[TurboModules]] · [[Hermes]] · [[JSI]]
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- 응용: [[React Native Skia]]
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- Adjacent: [[Concurrent React]]
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## 🤖 LLM 활용
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**언제**: RN new architecture migration, TurboModule/Fabric component authoring, JSI binding.
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**언제 X**: pure JS-only RN questions (state management, navigation library).
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## ❌ 안티패턴
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- **Mixing old bridge modules with Fabric without interop**: runtime crash.
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- **Skipping codegen**: hand-written specs drift from native; codegen 의 source of truth.
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- **JSI HostObject 의 long-running work**: blocks JS thread; offload to native thread.
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- **Old `NativeModules.X` API in new code**: TurboModuleRegistry 의 사용.
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## 🧪 검증 / 중복
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- Verified (React Native official docs — New Architecture, RFC 0588 Fabric).
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- 신뢰도 A.
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## 🕓 Changelog
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| 날짜 | 변경 |
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|---|---|
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| 2026-05-08 | Phase 1 |
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| 2026-05-10 | Manual cleanup — Fabric renderer / new arch full content |
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