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README.md

@@ -20,8 +20,9 @@ A curated dataset of source code from **GitHub's top trending developers (2015-2
 
 ## Dataset Summary
 
-- **1.3M+ source code files** from ~13,500 repositories across ~4,700 unique developers
-- **All programming languages** included (Python, JavaScript, TypeScript, Rust, Go, C/C++, Java, and 80+ more)
+- **1.3M+ source code files** from repositories across ~4,700 unique developers
+- **80+ programming languages** included (Python, JavaScript, TypeScript, Rust, Go, C/C++, Java, and more)
+- **Source code only** — config files (JSON, YAML, TOML, etc.) and documentation (Markdown, TXT) are excluded
 - **Permissive licenses only** (MIT, Apache-2.0, BSD, ISC, etc.)
 - **Rich metadata** per file: repo stars, commit count, developer trending rank, company affiliation
 
@@ -32,24 +33,24 @@ Each row represents a single source file:
 | Column | Type | Description |
 |--------|------|-------------|
 | `file_path` | string | Path within the repo (e.g. `src/main.py`) |
-| `file_language` | string | Detected programming language |
+| `file_language` | string | Language detected from file extension (e.g. `Python`, `JavaScript`) |
 | `file_size` | int64 | File size in bytes |
 | `content` | string | Raw source code (UTF-8) |
 | `repo_name` | string | Full repository name (`owner/repo`) |
 | `repo_stars` | int64 | GitHub star count at time of collection |
-| `repo_commit_count` | int64 | Total commits on default branch |
+| `repo_commit_count` | int64 | Total commits on default branch (nullable — null if unavailable) |
 | `repo_license` | string | SPDX license identifier |
 | `repo_description` | string | Repository description |
-| `repo_primary_language` | string | GitHub-detected primary language |
-| `repo_topics` | list[string] | Repository topics/tags |
+| `repo_primary_language` | string | GitHub-detected primary language of the repository |
 | `developer_username` | string | GitHub username |
 | `developer_name` | string | Developer display name |
 | `developer_company` | string | Company affiliation |
-| `developer_times_trended` | int64 | Number of times on GitHub trending page |
 | `developer_best_rank` | int64 | Best trending rank achieved |
 | `developer_avg_rank` | float64 | Average trending rank |
 | `developer_median_rank` | float64 | Median trending rank |
 
+**Note on language columns:** `file_language` is determined per-file from the file extension (e.g. a `.py` file is always `Python`). `repo_primary_language` is GitHub's auto-detected primary language for the entire repository. These may differ — for example, a C header file (`.h` → `C/C++ Header`) in a repo that GitHub classifies as `Python`.
+
 ## Usage
 
 ```python
@@ -82,17 +83,18 @@ Existing code datasets are massive bulk scrapes of all public GitHub repos. This
 ## Collection Methodology
 
 1. **Developer sourcing**: 4,763 unique developers extracted from [ronantakizawa/github-top-developers](https://huggingface.co/datasets/ronantakizawa/github-top-developers), which tracks GitHub trending page appearances from 2015-2025 via Wayback Machine snapshots.
-2. **Repository discovery**: For each developer, their top 5 repositories by stars were selected using the GitHub API, filtered to repos they own (not forks or contributions).
+2. **Repository discovery**: For each developer, their top 10 repositories by stars were selected using the GitHub API, filtered to repos they own (not forks or contributions).
 3. **License filtering**: Only repositories with permissive licenses (MIT, Apache-2.0, BSD, ISC, Unlicense, etc.) were included.
 4. **Code extraction**: Repository tarballs were downloaded and source files extracted, skipping binary files, vendored directories (`node_modules`, `vendor`, etc.), generated files, and files exceeding 1MB.
-5. **Metadata enrichment**: Each file is linked to repository metadata (stars, language, topics) and developer metadata (trending history, company).
+5. **Source code filtering**: Only source code files are included (80+ language extensions). Configuration files (JSON, YAML, TOML, XML, INI), documentation (Markdown, TXT, RST), and template files are excluded.
+6. **Metadata enrichment**: Each file is linked to repository metadata (stars, language, topics) and developer metadata (trending history, company).
 
 ## Filtering Applied
 
 - **Repos**: Owner-created only (no forks), permissive license, non-empty
 - **Directories skipped**: `node_modules`, `vendor`, `third_party`, `dist`, `build`, `__pycache__`, `.git`, `venv`, and 30+ more
-- **Files skipped**: Binary files, files >1MB, non-UTF-8 files
-- **Top 5 repos per developer** by star count
+- **Files skipped**: Binary files, files >1MB, non-UTF-8 files, config/doc files (JSON, YAML, TOML, XML, Markdown, etc.)
+- **Top 10 repos per developer** by star count
 
 ## Limitations