# Git Tools

Inspect and author Git interchange formats locally in the browser.

Git Tools is a standalone local-first application in the [add·ideas Toolbox](https://git.add-ideas.de/lotobo/toolbox-portal). Inputs are processed in the browser and are not uploaded.

## Version 0.1 scope

- Unified and `git diff` patch parsing with file status, modes, renames, hunk counts, line numbers, statistics, binary markers, and diagnostics
- Unified patch authoring from before/after text with bounded LCS, context selection, path safety, and missing-final-newline markers
- Exact, atomic text-patch application and reversal against an explicit JSON repository snapshot, with downloadable JSON or deterministic ZIP output and no working-tree access
- Layered `.gitignore` matching for comments, escapes, globstars, character classes, directory rules, negation, global excludes, `.git/info/exclude`, parent-to-child nested files, explicit tracked state, winning-rule explanations, and ignored-parent diagnostics
- Root `.gitattributes` evaluation with set/unset/value/unspecified states, last-match provenance, and directory-pattern diagnostics
- Strict SemVer 2.0 precedence plus common exact, comparator, partial, wildcard, hyphen, tilde, caret, AND, and OR ranges
- Conventional Commit builder and structural lint with breaking-change/footer diagnostics
- Keep-a-Changelog heading/section normalization, stable ordering, and duplicate-entry removal
- Advisory release planning from Conventional Commit headers: SemVer bump, grouped notes, tag name, invalid-input evidence, and review-only command sequence

Patch and before/after inputs are capped at 4 MiB with additional file, line, hunk, and diff-matrix bounds. Applied snapshots are text-only, exact-match, atomic, limited to 5,000 files/32 MiB, and never touch the working tree. Ignore inputs are an explicit local snapshot; command-line exclude rules and submodule repository boundaries are not modeled. Attribute macros and nested attribute files are not expanded. No workspace or `.git` directory is accessed. See [docs/ARCHITECTURE.md](docs/ARCHITECTURE.md) and [docs/PRIVACY-SECURITY.md](docs/PRIVACY-SECURITY.md).

## Development

Requires Node.js 22 and npm 11.

```sh
npm ci
npm run check
npm run test:browser
```

## Release

`npm run release:artifact` creates a deterministic `release/git-tools-0.2.0.zip` and checksum sidecar.

## Licence

GPL-3.0-or-later. Runtime dependencies retain their own licences; see [THIRD_PARTY_NOTICES.md](THIRD_PARTY_NOTICES.md).