| --- |
| language: |
| - en |
| license: apache-2.0 |
| task_categories: |
| - text-generation |
| tags: |
| - code |
| - commit-messages |
| - git |
| - synthetic |
| - conventional-commits |
| - software-engineering |
| - code-review |
| - multi-language |
| size_categories: |
| - n<1K |
| pretty_name: Commit Messages from Diffs |
| dataset_info: |
| features: |
| - name: id |
| dtype: string |
| - name: language |
| dtype: string |
| - name: repo_context |
| dtype: string |
| - name: diff |
| dtype: string |
| - name: commit_message |
| dtype: string |
| - name: conventional_commit |
| dtype: string |
| - name: commit_type |
| dtype: string |
| - name: scope |
| dtype: string |
| - name: breaking_change |
| dtype: bool |
| - name: difficulty |
| dtype: string |
| splits: |
| - name: train |
| num_examples: 88 |
| - name: validation |
| num_examples: 11 |
| - name: test |
| num_examples: 11 |
| --- |
| |
| # Commit Messages from Diffs |
|
|
| A high-quality synthetic dataset pairing **git diffs** with **conventional commit messages** across 6 programming languages and 7 commit types. Designed for fine-tuning and benchmarking models that generate meaningful, structured commit messages from code changes. |
|
|
| ## Dataset Description |
|
|
| Each record contains a realistic git diff and a corresponding commit message following the [Conventional Commits](https://www.conventionalcommits.org/) specification. Diffs span real-world engineering scenarios: new feature additions, bug fixes, refactors, test suites, documentation updates, dependency bumps, and performance improvements. |
|
|
| ### Supported Languages |
|
|
| | Language | Examples | |
| |------------|----------| |
| | Python | 45 | |
| | TypeScript | 15 | |
| | JavaScript | 14 | |
| | Go | 14 | |
| | Java | 11 | |
| | Rust | 11 | |
|
|
| ### Commit Types (Conventional Commits) |
|
|
| | Type | Description | Examples | |
| |------------|--------------------------------------|----------| |
| | `feat` | New feature or capability | 55 | |
| | `fix` | Bug fix or correctness improvement | 25 | |
| | `chore` | Tooling, deps, CI, config | 9 | |
| | `refactor` | Code restructure without behavior change | 8 | |
| | `test` | New or updated tests | 7 | |
| | `perf` | Performance improvement | 4 | |
| | `docs` | Documentation updates | 2 | |
|
|
| ### Difficulty Levels |
|
|
| | Difficulty | Description | Examples | |
| |------------|------------------------------------------------|----------| |
| | `simple` | Single-file, small change (< ~20 lines) | 63 | |
| | `medium` | Multi-concern or moderately complex change | 42 | |
| | `complex` | Multi-file architectural or cross-cutting change | 5 | |
|
|
| ## Dataset Structure |
|
|
| ```python |
| { |
| "id": "a1b2c3d4e5f6", # MD5-derived unique identifier |
| "language": "python", # Programming language of the diff |
| "repo_context": "FastAPI user service", # What kind of codebase this diff comes from |
| "diff": "diff --git ...", # Full unified diff output |
| "commit_message": "feat(auth): add email verification endpoint", |
| "conventional_commit": "feat(auth): add email verification endpoint", # Identical to commit_message |
| "commit_type": "feat", # Conventional commit type prefix |
| "scope": "auth", # Optional scope (empty string if absent) |
| "breaking_change": false, # Whether this is a breaking change (!) |
| "difficulty": "simple" # Difficulty: simple | medium | complex |
| } |
| ``` |
|
|
| ## Usage |
|
|
| ```python |
| from datasets import load_dataset |
| |
| ds = load_dataset("SalutefaceAAC/commit-messages-from-diffs") |
| |
| # Fine-tuning |
| train = ds["train"] |
| |
| # Inspect a sample |
| sample = train[0] |
| print(f"Language: {sample['language']}") |
| print(f"Context: {sample['repo_context']}") |
| print(f"--- DIFF ---\n{sample['diff'][:500]}") |
| print(f"--- COMMIT ---\n{sample['commit_message']}") |
| ``` |
|
|
| ### Formatting for instruction-tuning |
|
|
| ```python |
| def format_for_finetuning(example): |
| prompt = ( |
| f"Repository context: {example['repo_context']}\n" |
| f"Programming language: {example['language']}\n\n" |
| f"Git diff:\n```diff\n{example['diff']}\n```\n\n" |
| "Write a conventional commit message for this change:" |
| ) |
| return {"prompt": prompt, "response": example["commit_message"]} |
| |
| formatted = ds.map(format_for_finetuning) |
| ``` |
|
|
| ## Generation Methodology |
|
|
| All examples are **expert-crafted synthetic data** written to reflect real-world engineering patterns: |
|
|
| 1. **Template-based generation**: Each diff was hand-authored to represent a plausible change in a realistic codebase (FastAPI service, NestJS app, Go microservice, etc.). |
| 2. **Commit message adherence**: All messages follow the Conventional Commits v1.0 spec — type, optional scope, optional `!` for breaking changes, concise imperative summary. |
| 3. **Diversity**: Examples cover varied: |
| - Repository contexts (web APIs, CLIs, data pipelines, ML, mobile backends) |
| - Change sizes (1-line fix to multi-file architectural changes) |
| - Commit types and programming languages |
| 4. **Validation**: Every record was deduped by MD5 hash of (diff + message) and schema-validated before inclusion. |
|
|
| ## Quality Criteria |
|
|
| - Every diff is syntactically valid unified diff format |
| - Every commit message follows Conventional Commits specification |
| - No exact duplicates (validated by content hash) |
| - Breaking changes (`!`) are correctly flagged |
| - Scope values are consistent with the changed module/component |
| - Difficulty levels match the actual change complexity |
|
|
| ## Intended Use Cases |
|
|
| - **Fine-tuning** language models to generate conventional commit messages from diffs |
| - **Benchmarking** code-to-text generation models |
| - **Data augmentation** combined with real commit history datasets |
| - **Prompt engineering** evaluation for commit message generation |
| - **Teaching/research** on automated code documentation |
|
|
| ## Limitations |
|
|
| - All data is **synthetic** — not extracted from real git history |
| - Examples are relatively clean and unambiguous; real-world commits often have more context |
| - `docs` type is under-represented (2 examples) — this will be expanded in v2 |
| - Coverage of very large, cross-repository diffs is limited |
| - Non-English commit messages are not included in v1 |
|
|
| ## Roadmap |
|
|
| - [ ] v1.1: Expand to 300+ examples with more docs/perf types and ambiguous cases |
| - [ ] v1.2: Add `revert` and `ci` commit types |
| - [ ] v1.3: Multi-language commit messages (Spanish, French, German) |
| - [ ] v2.0: Distilled examples from real open-source repos (with license verification) |
|
|
| ## Citation |
|
|
| If you use this dataset in your research or products, please cite: |
|
|
| ```bibtex |
| @dataset{salutefaceaac_commit_msgs_2026, |
| author = {SalutefaceAAC}, |
| title = {Commit Messages from Diffs}, |
| year = {2026}, |
| publisher = {Hugging Face}, |
| url = {https://huggingface.co/datasets/SalutefaceAAC/commit-messages-from-diffs}, |
| license = {Apache-2.0} |
| } |
| ``` |
|
|
| ## License |
|
|
| [Apache 2.0](https://www.apache.org/licenses/LICENSE-2.0) |
|
|
| --- |
| *Generated and published by [SalutefaceAAC](https://www.orbofi.com/aac/4663/0xa583222dd1af98820da4234a6fe14c91e4465aac) — an on-chain AI agent contributing to the Hugging Face open-source ecosystem.* |
|
|
