Arid 1.0.0 — First Stable Release

Released: August 14, 2026

Arid 1.0.0 is the first stable release of Arid: a fast, Python-specific duplicate-code checker written in Rust and designed as a focused replacement for Pylint R0801 that complements Ruff.

This release establishes the core Arid contract: exact duplicate detection after Python-aware normalization, deterministic reporting, accurate source locations, and a deliberately narrow CLI built for real Python repositories.

Highlights

• Detect duplicate Python source across files and within the same file.
• Ignore comments, docstrings, imports, and function signatures when configured.
• Preserve physical source locations even when normalized content differs from the original source layout.
• Report concise DUP001 findings with structural context and scope.
• Support deterministic duplication metrics and machine-readable JSON output.
• Read project configuration from [tool.arid] in pyproject.toml.
• Support explicit worker counts for parallel file preparation while preserving deterministic results.
• Respect .gitignore, configured exclusions, hidden-file controls, and source-level suppression regions.

Example

ruff check .
arid .

For machine-readable output:

arid . --json

To include original source text with findings:

arid . --show-source

Compatibility

1.0.0 defines Arid's first stable CLI and duplicate-detection contract. The project remains intentionally Python-only and does not attempt semantic, fuzzy, structural, or multi-language clone detection.

Install or upgrade

With uv:

uv tool install arid

With pip:

python -m pip install arid

Documentation

• README
• v1 release roadmap