| 1 | # React |
| 2 | |
| 3 | **Scope**: All code EXCEPT `/compiler/` (compiler has its own instructions). |
| 4 | |
| 5 | ## Project Structure |
| 6 | |
| 7 | | Directory | Purpose | |
| 8 | |-----------|---------| |
| 9 | | `/packages/` | Publishable packages (react, react-dom, scheduler, etc.) | |
| 10 | | `/scripts/` | Build, test, and development scripts | |
| 11 | | `/fixtures/` | Test applications for manual testing | |
| 12 | | `/compiler/` | React Compiler (separate sub-project) | |
| 13 | |
| 14 | ## Key Packages |
| 15 | |
| 16 | | Package | Purpose | |
| 17 | |---------|---------| |
| 18 | | `react` | Core React library | |
| 19 | | `react-dom` | DOM renderer | |
| 20 | | `react-reconciler` | Core reconciliation algorithm | |
| 21 | | `scheduler` | Cooperative scheduling | |
| 22 | | `react-server-dom-*` | Server Components | |
| 23 | | `react-devtools-*` | Developer Tools | |
| 24 | | `react-refresh` | Fast Refresh runtime | |
| 25 | |
| 26 | ## Requirements |
| 27 | |
| 28 | - **Node**: Must be installed. Stop and prompt user if missing. |
| 29 | - **Package Manager**: Use `yarn` only. |
| 30 | |
| 31 | ## Verification |
| 32 | |
| 33 | **IMPORTANT**: Use `/verify` to validate all changes before committing. |
| 34 | |
| 35 | ## Commands |
| 36 | |
| 37 | | Command | Purpose | |
| 38 | |----------|----------------------| |
| 39 | | `/fix` | Lint and format code | |
| 40 | | `/test` | Run tests | |
| 41 | | `/flow` | Type check with Flow | |
| 42 | | `/flags` | Check feature flags | |
| 43 | |
| 44 | ## Building |
| 45 | |
| 46 | Builds are handled by CI. Do not run locally unless instructed. |