Add GEMINI.md

GEMINI.md

@@ -0,0 +1,34 @@
+# Project Overview
+
+This project is a Dart package named `base32_codec`. It provides a flexible and efficient way to encode and decode Base32 data, following the conventions of `dart:convert`. The package is written in pure Dart and has no platform-specific dependencies.
+
+## Key Features
+
+*   **Multiple Base32 Variants:** Supports three popular Base32 alphabets:
+    *   [RFC 4648](https://datatracker.ietf.org/doc/html/rfc4648) (the standard)
+    *   [RFC 4648 "Hex"](https://datatracker.ietf.org/doc/html/rfc4648#section-7)
+    *   [Crockford's Base32](http://www.crockford.com/base32.html)
+*   **Stream-Based Conversion:** The API is compatible with Dart's `Stream` and `Codec` interfaces, making it suitable for processing large data sets without loading everything into memory.
+*   **Synchronous Conversion:** For smaller data, the library provides simple `encode` and `decode` methods.
+
+# Building and Running
+
+This is a Dart library, so there is no main executable to run. However, you can run the tests to verify its functionality.
+
+## Running Tests
+
+The project uses the `test` package for testing. To run the tests, use the following command:
+
+```bash
+dart test
+```
+
+# Development Conventions
+
+## Code Style
+
+The project follows the standard Dart and Flutter linting rules, as defined in the `analysis_options.yaml` file. The `lints` package is used to enforce these rules.
+
+## Testing
+
+The project has a comprehensive test suite in the `test` directory. The tests cover all three Base32 variants and include test vectors from RFC 4648 to ensure correctness. The tests also cover the stream-based (chunked) conversion logic.

pubspec.lock

@@ -394,4 +394,4 @@ packages:
     source: hosted
     version: "3.1.3"
 sdks:
-  dart: ">=3.9.3 <4.0.0"
+  dart: ">=3.9.0 <4.0.0"

pubspec.yaml

@@ -9,7 +9,7 @@ topics:
   - codec
 
 environment:
-  sdk: ^3.9.3
+  sdk: ^3.9.0
 
 dev_dependencies:
   lints: ^6.0.0