Quad4/commit-messages-high-quality

Commit Messages from High-Quality Repositories

292,269 cleaned git commit messages scraped from the full histories of 15 well-regarded open-source projects, balanced across two styles: normal (196,372) and conventional commits (95,897).

Dataset Summary

• Each record contains the commit subject, body, plus metadata: repo, sha, date, author, and labels: style (normal/conventional), type (fix, feat, docs, ...), scope, breaking.
• Heavy cleaning: GitHub squash suffixes (#123) stripped, bot/automated commits removed, canned boilerplate removed, exact duplicates removed, git trailers (Signed-off-by etc.) stripped from bodies, junk subjects ("wip", "update", ...) removed.
• Temporal split: train is the oldest ~98% of commits, validation the next ~1%, test the newest ~1%. No train/eval temporal leakage: every eval commit is newer than every train commit.

Supported Tasks

• text-generation: commit message generation, style modeling, conventional-commit classification, software-engineering NLP.

Usage

from datasets import load_dataset

ds = load_dataset("USERNAME/REPO", "default")          # full metadata records
view = load_dataset("USERNAME/REPO", "training_view")  # prompt/completion pairs (body -> subject)

training_view maps a change description (the commit body) to the commit subject line and is formatted for fine-tuning tools such as Unsloth, with explicit prompt and completion columns.

Source Repositories

Repository	URL	Commits in dataset
postgres	https://github.com/postgres/postgres	57,971
openssl	https://github.com/openssl/openssl	53,169
angular	https://github.com/angular/angular	39,465
curl	https://github.com/curl/curl	37,130
ant-design	https://github.com/ant-design/ant-design	22,853
neovim	https://github.com/neovim/neovim	22,096
babel	https://github.com/babel/babel	13,719
vite	https://github.com/vitejs/vite	8,209
eslint	https://github.com/eslint/eslint	7,837
tmux	https://github.com/tmux/tmux	7,618
vue-core	https://github.com/vuejs/core	7,540
vitest	https://github.com/vitest-dev/vitest	5,120
nestjs	https://github.com/nestjs/nest	4,147
chart-js	https://github.com/chartjs/Chart.js	3,718
axios	https://github.com/axios/axios	1,677

Upstream Licenses

Commit messages are inherited from their source projects. Repositories under copyleft or source-available licenses (git: GPL-2.0; redis: BSD-3 / RSALv2 / SSPLv1) were excluded as a precaution: software licenses technically cover the licensed program rather than VCS metadata, but commit messages are therefore not openly licensed either, and longer commit bodies can constitute original expression of their authors. Only permissively-licensed projects are included:

Repository	License
angular/angular	MIT
vuejs/core	MIT
vitejs/vite	MIT
babel/babel	MIT
eslint/eslint	MIT
ant-design/ant-design	MIT
axios/axios	MIT
nestjs/nest	MIT
chartjs/Chart.js	MIT
vitest-dev/vitest	MIT
curl/curl	curl (MIT-style)
neovim/neovim	Apache-2.0 / VIM
tmux/tmux	ISC
openssl/openssl	Apache-2.0
postgres/postgres	PostgreSQL License

Users should still respect upstream license terms when redistributing or using this dataset commercially.

Cleaning Statistics

Filter	Records dropped
duplicate	77,038
bad_subject	16,190
bot_or_automated	26,432
license_excluded	83,369
canned_message	9,943

Splits

Split	Records	Date range
train	286,425	1996-07-09 → 2026-07-14
validation	2,922	2026-07-14 → 2026-08-20
test	2,922	2026-08-20 → 2026-09-23

Privacy

• No author names or email addresses are included. Records are identified only by content sha + repository, which preserves verifiable provenance without identifying individuals.
• Note: commit bodies may reference contributor names in prose (e.g. credit lines), as these are part of the historical commit text itself.

Limitations

• English-dominant; commit messages from a single ecosystem of C/C++ and JavaScript/TypeScript projects.
• No diffs attached: the dataset describes what was written, not the code change itself.
• Bodies are truncated at 2,000 characters.
• Human authors made the source commits; quality varies by repository and era.

Reproduction

Built with a two-stage pipeline (blobless git clone --filter=blob:none, then git log export and rule-based cleaning). See stats.json for exact counts.