Add Python bindings

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Andras Schmelczer 2026-03-11 20:48:44 +00:00
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# `reconcile-text`: conflict-free 3-way text merging
A Rust and TypeScript library for merging conflicting text edits without manual intervention. Unlike traditional 3-way merge tools that produce conflict markers, `reconcile-text` automatically resolves conflicts by applying both sets of changes (while updating cursor positions) using an algorithm inspired by Operational Transformation.
A Rust, TypeScript, and Python library for merging conflicting text edits without manual intervention. Unlike traditional 3-way merge tools that produce conflict markers, `reconcile-text` automatically resolves conflicts by applying both sets of changes (while updating cursor positions) using an algorithm inspired by Operational Transformation.
## Try it
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- `cargo add reconcile-text` ([reconcile-text on crates.io][9])
- `npm install reconcile-text` ([reconcile-text on NPM][10])
- `uv add reconcile-text` or `pip install reconcile-text` ([reconcile-text on PyPI][27])
## Key features
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- **Cursor tracking** - Automatically repositions cursors and selections throughout the merging process
- **Flexible tokenisation** - Word-level (default), character-level, line-level, or custom tokenisation strategies
- **Unicode support** - Full UTF-8 support with proper handling of complex scripts and grapheme clusters
- **Cross-platform** - Native Rust performance with WebAssembly bindings for JavaScript environments
- **Cross-platform** - Native Rust performance with WebAssembly bindings for JavaScript and native bindings for Python
## Quick start
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See the [example website source](examples/website/src/index.ts) for a more complex example, or the [advanced examples document](docs/advanced-ts.md).
### Python
Install via uv or pip:
```sh
uv add reconcile-text
# or: pip install reconcile-text
```
Then use it in your application:
```python
from reconcile_text import reconcile
# Start with the original text
parent = "Hello world"
# Two users edit simultaneously
left = "Hello beautiful world"
right = "Hi world"
result = reconcile(parent, left, right)
print(result["text"]) # "Hi beautiful world"
```
See the [advanced Python examples](docs/advanced-python.md) for cursor tracking, change provenance, and compact diffs.
## Motivation
Collaborative editing presents the challenge of merging conflicting changes when multiple users edit documents simultaneously or asynchronously whilst offline. Traditional solutions like Conflict-free Replicated Data Types (CRDTs) or Operational Transformation (OT) work well when you control the complete editing infrastructure and can capture every individual operation ([1]). However, many workflows involve users editing with various tools, for example, Obsidian users editing Markdown files with various editors ranging from Vim to VS Code.
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### Environment
#### Python setup
Install [uv](https://docs.astral.sh/uv/getting-started/installation/) and build the extension for development:
```sh
cd reconcile-python
uv run maturin develop
```
#### Node.js setup
1. Install [nvm][25]:
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[24]: https://github.com/josephg/ShareJS
[25]: https://github.com/nvm-sh/nvm
[26]: https://rustup.rs
[27]: https://pypi.org/project/reconcile-text/