react-router - Partially revert optimization added in 7.1.4 to reduce calls to matchRoutes because it surfaced other issues (#13562)
react-router - Update Route.MetaArgs to reflect that data can be potentially undefined (#13563)
- This is primarily for cases where a route loader threw an error to it's own ErrorBoundary, but it also arises in the case of a 404 which renders the root ErrorBoundary/meta but the root loader did not run because not routes matched
react-router - Avoid initial fetcher execution 404 error when Lazy Route Discovery is interrupted by a navigation (#13564)
react-router - Properly href replaces splats * (#13593)
- href("/products/*", { "*": "/1/edit" }); // -> /products/1/edit
@react-router/architect - Update @architect/functions from ^5.2.0 to ^7.0.0 (#13556)
@react-router/dev - Prevent typegen with route files that are outside the app/ directory (#12996)
@react-router/dev - Add additional logging to build command output when cleaning assets from server build (#13547)
@react-router/dev - Don't clean assets from server build when build.ssrEmitAssets has been enabled in Vite config (#13547)
@react-router/dev - Fix typegen when same route is used at multiple paths (#13574)
- For example, routes/route.tsx is used at 4 different paths here:
```
import { type RouteConfig, route } from "@react-router/dev/routes";
export default [
  route("base/:base", "routes/base.tsx", [
    route("home/:home", "routes/route.tsx", { id: "home" }),
    route("changelog/:changelog", "routes/route.tsx", { id: "changelog" }),
    route("splat/*", "routes/route.tsx", { id: "splat" }),
  ]),
  route("other/:other", "routes/route.tsx", { id: "other" }),
] satisfies RouteConfig;
```
- Previously, typegen would arbitrarily pick one of these paths to be the "winner" and generate types for the route module based on that path
- Now, typegen creates unions as necessary for alternate paths for the same route file

@react-router/dev - Better types for params (#13543)

For example:

// routes.ts
import { type RouteConfig, route } from "@react-router/dev/routes";

export default [
  route("parent/:p", "routes/parent.tsx", [
    route("route/:r", "routes/route.tsx", [
      route("child1/:c1a/:c1b", "routes/child1.tsx"),
      route("child2/:c2a/:c2b", "routes/child2.tsx"),
    ]),
  ]),
] satisfies RouteConfig;

Previously, params for routes/route were calculated as { p: string, r: string }.
This incorrectly ignores params that could come from child routes
If visiting /parent/1/route/2/child1/3/4, the actual params passed to routes/route will have a type of { p: string, r: string, c1a: string, c1b: string }

Now, params are aware of child routes and autocompletion will include child params as optionals:

params.|
//     ^ cursor is here and you ask for autocompletion
// p: string
// r: string
// c1a?: string
// c1b?: string
// c2a?: string
// c2b?: string

You can also narrow the types for params as it is implemented as a normalized union of params for each page that includes routes/route:

if (typeof params.c1a === 'string') {
  params.|
  //     ^ cursor is here and you ask for autocompletion
  // p: string
  // r: string
  // c1a: string
  // c1b: string
}

@react-router/dev - Fix href for optional segments (#13595)
- Type generation now expands paths with optionals into their corresponding non-optional paths
- For example, the path /user/:id? gets expanded into /user and /user/:id to more closely model visitable URLs
- href then uses these expanded (non-optional) paths to construct type-safe paths for your app:
```
// original: /user/:id?
// expanded: /user & /user/:id
href("/user"); // ✅
href("/user/:id", { id: 1 }); // ✅
```
- This becomes even more important for static optional paths where there wasn't a good way to indicate whether the optional should be included in the resulting path:
```
// original: /products/:id/detail?

// before
href("/products/:id/detail?"); // ❌ How can we tell `href` to include or omit `detail?` segment with a complex API?

// now
// expanded: /products/:id & /products/:id/detail
href("/product/:id"); // ✅
href("/product/:id/detail"); // ✅
```

Unstable Changes

⚠️ Unstable features are not recommended for production use

@react-router/dev - Renamed internal react-router/route-module export to react-router/internal (#13543)
@react-router/dev - Removed Info export from generated +types/* files (#13543)
@react-router/dev - Normalize dirent entry path across node versions when generating SRI manifest (#13591)