docs: update readme

README.md

@@ -17,7 +17,7 @@ Generates `.pyi` type stub files for Cap'n Proto schemas, providing IDE autocomp
 | Arch Linux | `sudo pacman -S capnproto` |
 | Ubuntu/Debian | `sudo apt install capnproto` |
 | macOS | `brew install capnp` |
-| Windows | Download from [capnproto.org](https://capnproto.org) |
+| Windows | Download from [capnproto.org](https://capnproto.org/install.html) |
 
 ## Installation
 
@@ -33,82 +33,90 @@ capnp compile -opy myschema.capnp
 
 This generates `myschema_capnp.pyi` — a Python type stub file that type checkers can use. Runtime import (`import myschema_capnp`) is handled automatically by pycapnp's import hook.
 
-### Generated output
+### Multi-file projects
 
-For a schema like:
+```bash
+capnp compile -opy --src-prefix=. src/schema.capnp
+```
+
+Cross-file type references automatically produce relative imports in the generated stubs.
+
+## Example
+
+Input (`addressbook.capnp`):
 ```capnp
 struct Person {
   name @0 :Text;
   age  @1 :Int32;
-}
+  phones @2 :List(PhoneNumber);
 
-enum Gender { male @0; female @1; }
+  struct PhoneNumber {
+    number @0 :Text;
+    type @1 :Type;
+    enum Type { mobile @0; home @1; work @2; }
+  }
+}
 ```
 
-`myschema_capnp.pyi`:
+Output (`addressbook_capnp.pyi`):
 ```python
-"""Auto-generated type stub for myschema.capnp"""
+"""Auto-generated type stub for addressbook.capnp"""
 from __future__ import annotations
 from collections.abc import Iterator, Sequence
 from contextlib import contextmanager
 from typing import IO, Literal
 
-Gender = Literal["male", "female"]
-
 class Person:
     name: str
     age: int
+    phones: Sequence[Person.PhoneNumber | Person.PhoneNumberBuilder | Person.PhoneNumberReader]
+
+    class PhoneNumber:
+        Type = Literal["mobile", "home", "work"]
+        type: Type
+        number: str
+        ...
 
     @staticmethod
     def new_message(**kwargs) -> PersonBuilder: ...
-    @staticmethod
-    @contextmanager
-    def from_bytes(data: bytes, ...) -> Iterator[PersonReader]: ...
-    @staticmethod
-    def from_bytes_packed(data: bytes, ...) -> PersonReader: ...
     def to_dict(self) -> dict: ...
 
 class PersonReader(Person):
     def as_builder(self) -> PersonBuilder: ...
 
 class PersonBuilder(Person):
-    @staticmethod
-    def from_dict(dictionary: dict) -> PersonBuilder: ...
-    def copy(self) -> PersonBuilder: ...
     def to_bytes(self) -> bytes: ...
-    def to_bytes_packed(self) -> bytes: ...
-    def to_segments(self) -> list[bytes]: ...
     def as_reader(self) -> PersonReader: ...
-    @staticmethod
-    def write(file: IO[bytes]): ...
-    @staticmethod
-    def write_packed(file: IO[bytes]): ...
-```
-
-## Development
-
-Uses [PDM](https://pdm-project.org/) for project management.
-
-```bash
-git clone https://github.com/capnproto/pycapnp  # or your fork
-cd capnp-py
-pdm install      # installs dependencies + dev tools
-pdm run pytest   # run tests
+    ...
 ```
 
 ## Supported Features
 
 | Feature | Status |
 |---------|--------|
-| Structs (Reader/Builder classes) | ✅ |
-| Enums (Literal aliases) | ✅ |
+| Structs (Reader / Builder classes) | ✅ |
+| Enums (`Literal[...]` aliases) | ✅ |
 | Nested types | ✅ |
-| Lists (Sequence[T]) | ✅ |
-| Unions (which/init) | ✅ |
+| Lists (`Sequence[T]`) | ✅ |
+| Unions (`which()` / `@overload init()`) | ✅ |
+| Groups | ✅ |
 | Self-referencing structs | ✅ |
-| Interfaces (RPC) | ⏳ Phase 3 |
-| Constants | ⏳ Phase 2 |
-| Generics | ⏳ Phase 2 |
+| Constants (primitives, enums) | ✅ |
+| Generics (`TypeVar`, `Generic[T]`, brand resolution) | ✅ |
+| Interfaces (RPC: Client / Server classes) | ✅ |
+| Cross-file imports (relative `.` imports) | ✅ |
+| Annotations (`$Cxx.name`, etc.) | ⏳ |
+
+## Development
+
+Uses [PDM](https://pdm-project.org/) for project management.
+
+```bash
+git clone https://github.com/NCBM/capnpc-py
+cd capnp-py
+pdm install      # installs dependencies + dev tools
+pdm run pytest   # run tests
+```
 
 ## License