---
license: mit
language:
- en
---

# Dataset: `dataset.jsonl`

Auto-labeled commit dataset scraped from GitHub repositories. Each line is a JSON object representing one commit with extracted features and an inferred label.

## Features

| Field | Type | Description | Stats |
|---|---|---|---|
| `text` | string | Commit message first line, conventional prefix stripped | — |
| `files_count` | int | Number of files changed | mean 4.3, median 1, max 300 |
| `additions` | int | Lines added | mean 88, median 6, max 187K |
| `deletions` | int | Lines deleted | mean 172, median 3, max 2.3M |
| `changed_tests` | int | Files matching test/spec patterns | mean 0.4, median 0, max 286 |
| `changed_docs` | int | Files matching doc/documentation patterns | mean 0.6, median 0, max 300 |
| `changed_source` | int | Files with known source extensions | mean 2.3, median 1, max 300 |
| `has_tests` | bool | Any file in test/spec directory | — |
| `has_docs` | bool | Any file in docs directory | — |
| `extensions` | [string] | Unique file extensions in the diff | 592 unique |

Top extensions: `md`, `go`, `cc`, `js`, `h`, `json`, `ts`, `yml`, `rc`, `mm`

| `directories` | [string] | Unique top-level directories in the diff | 61 unique |

Top directories: `docs`, `pkg`, `shell`, `atom`, `spec`, `lib`, `test`, `script`

| `label` | string | Inferred commit category | see distribution above |

## Labeling heuristics

Labels are inferred from the commit message and file changes using a cascade of signals:

### Conventional commit prefix (highest confidence)
```
fix(scope):     → bugfix
feat(scope):    → feature
chore(scope):   → chore
refactor(scope):→ refactor
docs(scope):    → docs
test(scope):    → test
perf(scope):    → perf
ci(scope):      → ci
build(scope):   → build
style(scope):   → style
revert(scope):  → revert
```

### Gitmoji prefix
```
:bug:           → bugfix
:sparkles:      → feature
:books:         → docs
:hammer:        → refactor
...             → (28 emoji mapped)
```

### Keyword start (first word)
```
fix/correct     → bugfix   (unless "lint"→chore, "typo"→docs, docs-only→docs)
doc/readme      → docs
add/new/support → feature
remove/cleanup  → refactor
update/bump     → chore
test/spec       → test
revert/rollback → revert
```

### Free-text keyword (within the whole first line)
```
crash/corrupt/leak/deadlock       → bugfix
prevent/avoid/guard               → bugfix
cleanup/tidy/polish               → refactor
renam/move                        → refactor
refactor/restruct/redesign/rewrite→ refactor
```

### File-only fallback
- All files in docs directories → `docs`
- All files in test/spec directories → `test`

## Source repos

Data was scraped from the `commits` endpoint of these public repositories:

- electron/electron
- yargs/yargs
- istanbuljs/istanbuljs
- fastify/fastify
- jenkins-x/jx