chore: update packer metadata and readme

packer/README.md

@@ -1,5 +1,52 @@
 # sarasacw-omrf-packer
 
+`sarasacw-omrf-packer` is the distribution packer of the Sarasas Chip Workshop Oh My Rust FFI (OMRF) toolset.
+Given a Rust project that exposes a C-friendly FFI as a `cdylib`, it assembles a CMake-style redistributable tree.
+It involves header files, the built dynamic library, and generated CMake and pkg-config package files,
+and it can additionally bundle the result into a zip archive.
+
+It targets Rust FFI projects that need to be distributed and consumed like ordinary CMake/pkg-config packages, 
+including on MSVC-only Windows toolchains where pkg-config alone is not enough.
+
+## Status
+
+Barely works for the specific workflow of Sarasas Chip Workshop.
+And will be improved by new requirement coming from Sarasas Chip Workshop devlopment.
+
+Projects declare the minimum required packer version through the `min_version` field in their `[package.metadata.omrf]` table; 
+running an older packer than requested fails fast with a clear error.
+
+## License
+
+Licensed under the MIT License.
+
+## Usage
+
+Install from PyPI (the project is built with `uv`, but `pipx install` or `pip install` work just as well on the published wheel):
+
+```console
+uv tool install sarasacw-omrf-packer
+```
+
+The packer does not build the project itself. Build it first -- `cargo build --release`, adding `--target <triple>` for cross-compilation -- then run:
+
+```console
+sarasacw-omrf-packer -m path/to/Cargo.toml
+```
+
+`cargo` and `rustc` are resolved from `PATH`; override them with the environment variables listed in the [Environment Variables](#environment-variables) section.
+
+### Command-line options
+
+| Option | Required | Description |
+|---|---|---|
+| `-m`, `--manifest <CARGO.TOML>` | yes | Path to the `Cargo.toml` of the project to pack. |
+| `-d`, `--dist-dir <DIR>` | no | Directory where the redistributable tree is materialized (`bin/`, `include/`, `lib/`, ...). |
+| `-z`, `--dist-zip <ZIP>` | no | Path of the zip archive produced from the redistributable tree. |
+| `-t`, `--target <TRIPLE>` | no | Target triple to pack for (e.g. `x86_64-pc-windows-msvc`). Defaults to the host toolchain triple. |
+
+`--dist-dir` and `--dist-zip` are independent: pass either, both, or neither. Omitting both performs a dry run that validates the configuration without writing any output. Run `sarasacw-omrf-packer --help` for the authoritative list.
+
 ## Metadata
 
 All packer used properties are stored in target Rust manifest file as metadata style.
@@ -77,5 +124,7 @@ requires = ["libfoo >= 1.0", "libbar"]
 
 ## Environment Variables
 
-- `OMRF_PACKER_CARGO`: Path to the `cargo` executable used to collect project metadata. When unset, the packer invokes `cargo` as resolved from `PATH`.
+- `OMRF_PACKER_CARGO`: Path to the `cargo` executable used to collect project metadata. 
-- `OMRF_PACKER_RUSTC`: Path to the `rustc` executable used to resolve the host toolchain triple. When unset, the packer invokes `rustc` as resolved from `PATH`.
+When unset, the packer invokes `cargo` as resolved from `PATH`.
+- `OMRF_PACKER_RUSTC`: Path to the `rustc` executable used to resolve the host toolchain triple. 
+When unset, the packer invokes `rustc` as resolved from `PATH`.

packer/pyproject.toml

@@ -1,12 +1,26 @@
 [project]
 name = "sarasacw-omrf-packer"
 version = "1.0.0"
-description = "Add your description here"
+description = "The packer for Rust, specifically designed for the SarasaCW OMRF project, to distribute C-friendly FFI dynamic library as CMake package."
 readme = "README.md"
 authors = [
     { name = "yyc12345", email = "yyc12321@outlook.com" }
 ]
 requires-python = ">=3.13"
+license = { text = "MIT" }
+keywords = ["rust", "ffi", "cmake", "pkg-config", "packaging", "omrf"]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Intended Audience :: Developers",
+    "Topic :: Software Development :: Build Tools",
+    "License :: OSI Approved :: MIT License",
+    "Operating System :: Microsoft :: Windows",
+    "Operating System :: POSIX",
+    "Operating System :: MacOS",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3 :: Only",
+]
 dependencies = [
     "jinja2==3.1.6",
     "semver>=3.0.4",
@@ -15,6 +29,11 @@ dependencies = [
 [project.scripts]
 sarasacw-omrf-packer = "sarasacw_omrf_packer:main"
 
+[project.urls]
+Homepage = "https://github.com/SarasasChipWorkshop/sarasacw-omrf"
+Repository = "https://github.com/SarasasChipWorkshop/sarasacw-omrf"
+Issues = "https://github.com/SarasasChipWorkshop/sarasacw-omrf/issues"
+
 [build-system]
 requires = ["uv_build>=0.8.0,<0.9"]
 build-backend = "uv_build"