python-invar (DEPRECATED)

This package is deprecated. Please migrate to the new packages.

Migration Guide

python-invar has been split into two packages for better modularity:

Old	New	Purpose
`python-invar`	`invar-runtime`	Runtime contracts (`@pre`, `@post`, `must_use`, etc.)
`python-invar`	`invar-tools`	CLI tools (`guard`, `map`, `sig`, MCP server)

For Projects Using Contracts

If your project uses Invar contracts at runtime:

pip uninstall python-invar
pip install invar-runtime

Update imports:

# Old
from invar import pre, post, Contract

# New (recommended)
from invar_runtime import pre, post, Contract

# Or keep using 'invar' (still works via invar-tools)
from invar import pre, post, Contract

For Development Tools

If you use Invar CLI tools:

pip uninstall python-invar
pip install invar-tools

Or use without installing:

uvx invar-tools guard

Why the Split?

invar-runtime (~3MB): Lightweight, only what your project needs at runtime
invar-tools (~100MB): Full development tools with Hypothesis, CrossHair, etc.

Projects can now depend on just invar-runtime without the heavy verification tools.

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Provenance

The following attestation bundles were made for python_invar-1.0.0.tar.gz:

Publisher: publish.yml on Tefx/Invar

Attestations: Values shown here reflect the state when the release was signed and may no longer be current.

Statement:
- Statement type: https://in-toto.io/Statement/v1
- Predicate type: https://docs.pypi.org/attestations/publish/v1
- Subject name: python_invar-1.0.0.tar.gz
- Subject digest: 06b871649d36d4c21bae1d63b623d0bad3f60c59acde85cc7f11abcda0b5cd4f
- Sigstore transparency entry: 777530613
- Sigstore integration time: Dec 23, 2025
Source repository:
- Permalink: Tefx/Invar@299ff07210187aec6fc60b13510baf83b51fee0e
- Branch / Tag: refs/tags/v1.0.1
- Owner: https://github.com/Tefx
- Access: public
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- Token Issuer: https://token.actions.githubusercontent.com
- Runner Environment: github-hosted
- Publication workflow: publish.yml@299ff07210187aec6fc60b13510baf83b51fee0e
- Trigger Event: release