Add dataset README

README.md

@@ -0,0 +1,67 @@
+---
+license: mit
+task_categories:
+  - text-generation
+  - text-classification
+language:
+  - en
+tags:
+  - git
+  - commits
+  - code
+  - software-engineering
+size_categories:
+  - 10K<n<100K
+---
+
+# GitGraph Training Data
+
+This dataset contains commit data extracted from various Git repositories for training the GitGraph model.
+
+## Contents
+
+- `gitgraph.duckdb` - DuckDB database containing:
+  - Commit metadata (hash, message, author, timestamp)
+  - File changes with diffs
+  - Repository information
+
+## Usage
+
+```python
+from huggingface_hub import hf_hub_download
+import duckdb
+
+# Download the database
+db_path = hf_hub_download(
+    repo_id="blankenshipdanielj/gitgraph-data",
+    repo_type="dataset",
+    filename="gitgraph.duckdb"
+)
+
+# Query the data
+conn = duckdb.connect(db_path, read_only=True)
+commits = conn.execute("SELECT * FROM commits LIMIT 10").fetchdf()
+print(commits)
+```
+
+## Schema
+
+### commits table
+- `commit_hash` (VARCHAR): Unique commit identifier
+- `repository_id` (VARCHAR): Repository identifier
+- `message` (VARCHAR): Full commit message
+- `message_subject` (VARCHAR): First line of commit message
+- `author_name` (VARCHAR): Author name
+- `author_email` (VARCHAR): Author email
+- `authored_at` (TIMESTAMP): Authoring timestamp
+
+### file_changes table
+- `id` (VARCHAR): Unique file change ID
+- `commit_hash` (VARCHAR): Associated commit hash
+- `file_path` (VARCHAR): Path to changed file
+- `change_type` (VARCHAR): Type of change (added, modified, deleted)
+- `diff_content` (VARCHAR): Unified diff content
+
+## License
+
+MIT License