fsedsl: simplify README usage section

fsedsl/README.md

@@ -105,61 +105,37 @@ func main() {
 }
 ```
 
-## Integration Guide
+## Usage
 
-For larger projects, create an adapter package that specializes fsedsl for your context type.
-
-### Step 1: Define your context type and type aliases
+Define your context type, then create type and function aliases that bake it in:
 
 ```go
-// myproject/fs/adapter.go
 package fs
 
 import "git.lneely.de/lkn/fsedsl"
 
 // Ctx carries runtime dependencies for handler functions.
 type Ctx struct {
-    DB       *Database
-    User     *User
-    Session  *Session
+    DB   *Database
+    User *User
 }
 
-// Type aliases for external use
-type FsNodeDecl = fsedsl.FsNodeDecl[Ctx]
-type NodeOption = fsedsl.NodeOption[Ctx]
-type Binding = fsedsl.Binding[Ctx]
-type Tree = fsedsl.Tree
-type File = fsedsl.File
-```
+// Type aliases for external consumers
+type (
+    FsNodeDecl = fsedsl.FsNodeDecl[Ctx]
+    Binding    = fsedsl.Binding[Ctx]
+    Tree       = fsedsl.Tree
+)
 
-### Step 2: Create local function aliases
-
-In the file where you define your spec, create package-local variable aliases
-that bake in your context type. This keeps the spec clean without requiring
-`[Ctx]` on every call:
-
-```go
-// myproject/fs/spec.go
-package fs
-
-import "git.lneely.de/lkn/fsedsl"
-
-// Local aliases for fsedsl constructors, specialized to Ctx.
+// Function aliases for clean spec definitions
 var (
-    DirNode   = fsedsl.DirNode[Ctx]
-    FileNode  = fsedsl.FileNode[Ctx]
-    Each      = fsedsl.Each[Ctx]
-    Doc       = fsedsl.Doc[Ctx]
-    Read      = fsedsl.Read[Ctx]
-    Write     = fsedsl.Write[Ctx]
-    Stream    = fsedsl.Stream[Ctx]
-    BlockOnce = fsedsl.BlockOnce[Ctx]
-    Request   = fsedsl.Request[Ctx]
-    Remove    = fsedsl.RemoveNode[Ctx]
-    Stat      = fsedsl.StatOverride[Ctx]
-    UID       = fsedsl.UID[Ctx]
-    GID       = fsedsl.GID[Ctx]
-    Bind      = fsedsl.Bind[Ctx]
+    DirNode  = fsedsl.DirNode[Ctx]
+    FileNode = fsedsl.FileNode[Ctx]
+    Each     = fsedsl.Each[Ctx]
+    Doc      = fsedsl.Doc[Ctx]
+    Read     = fsedsl.Read[Ctx]
+    Write    = fsedsl.Write[Ctx]
+    // ... add others as needed
 )
 
 var Spec = DirNode("/",
@@ -169,58 +145,37 @@ var Spec = DirNode("/",
             return []byte("1.0.0\n"), nil
         }),
     ),
-    
-    DirNode("users",
-        Doc("User management"),
-        Each("{user}", userBindings,
-            FileNode("name", 0444,
-                Read(func(ctx Ctx) ([]byte, error) {
-                    return []byte(ctx.User.Name + "\n"), nil
-                }),
-            ),
+    Each("{user}", userBindings,
+        FileNode("name", 0444,
+            Read(func(ctx Ctx) ([]byte, error) {
+                return []byte(ctx.User.Name + "\n"), nil
+            }),
         ),
     ),
 )
 
 func userBindings(ctx Ctx) ([]Binding, error) {
-    users, err := ctx.DB.ListUsers()
-    if err != nil {
-        return nil, err
-    }
-    
+    users, _ := ctx.DB.ListUsers()
     var out []Binding
     for _, u := range users {
-        user := u // capture for closure
+        user := u
         out = append(out, Binding{
             Name:    user.Username,
             Aliases: []string{user.ID},
-            Applier: func(c Ctx) Ctx {
-                c.User = user
-                return c
-            },
+            Applier: func(c Ctx) Ctx { c.User = user; return c },
         })
     }
     return out, nil
 }
 ```
 
-### Step 3: Build and use the tree
+Build and use:
 
 ```go
-// myproject/main.go
-package main
-
-import (
-    "myproject/fs"
-    "git.lneely.de/lkn/fsedsl"
-)
-
-func main() {
-    ctx := fs.Ctx{DB: connectDB()}
-    tree := fsedsl.BuildTree(fs.Spec, ctx)
-    
-    // Use tree.List(), tree.Open(), tree.Stat(), etc.
-}
+tree := fsedsl.BuildTree(fs.Spec, fs.Ctx{DB: db})
+entries, _ := tree.List()
+f, _ := tree.Open("alice/name")
+data, _ := f.Read()
 ```
 
 ## API Reference