# Installer witness avec Homebrew, Nix

Consultez les chemins d'installation, exécutables, métadonnées et notes de sécurité de witness pour les workflows d'agents IA.

## installation

```sh
sudo av install brew:witness
```

Commandes d'installation supplémentaires:

### macOS

- Homebrew (100%):

```sh
brew install witness
```

  Preuve: local Homebrew formula metadata

### Linux

- Nix (92%):

```sh
nix profile install nixpkgs#witness
```

  Preuve: nixpkgs package indexes: pkgs/by-name/wi/witness/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1

## Faits du paquet

- **Clé du paquet:** brew:witness
- **Gestionnaire de paquets:** Homebrew
- **Version:** 0.12.0
- **Résumé source:** Automates, normalizes, and verifies software artifact provenance
- **Page d'accueil:** <https://witness.dev>
- **Dépôt:** <https://github.com/in-toto/witness>
- **Dernière mise à jour:** 2026-08-02T12:51:38+01:00
- **Généré:** 2026-08-03T19:37:03+00:00

## exécutables

- witness (alias)

## Comportement d'installation

- Bouteille: non disponible

## Version et fraîcheur

- page générée: 2026-08-03
- version du gestionnaire: 0.12.0
## Historique du projet et usages

Witness is an in-toto supply-chain security CLI for producing and verifying attestations about software artifacts and build steps. The project describes itself as a pluggable framework that automates, normalizes, and verifies software artifact provenance, combining attestation generation with a policy engine.

### Historique du projet

Witness originated at TestifySec and was later donated to the CNCF in-toto ecosystem. TestifySec's open-source statement dates the formal donation of Witness and Archivista to January 2024, after ratification by the in-toto steering committee, giving the project community governance under the same ecosystem as the in-toto specification.

### Historique d'adoption

Witness sits inside the broader in-toto adoption story. CNCF records in-toto as accepted on August 14, 2019, moved to Incubating on March 10, 2022, and Graduated on February 10, 2025. That matters for Witness because it implements the in-toto specification in a CLI intended for real pipelines, and its README points users to CNCF Slack channels and open community meetings rather than a vendor-only support path.

The project is also tied to adjacent supply-chain standards and systems. The Witness README lists support for in-toto enhancement work, OPA Rego policy, Sigstore and SPIFFE/SPIRE signing paths, timestamp authorities, and Archivista storage, reflecting the post-SolarWinds era movement toward verifiable build provenance, signed attestations, and policy-driven release gates.

### Modes d'utilisation

A typical Witness workflow runs a command under `witness run` during a build or release step, collects attestations from configured attestors, signs them, and later verifies the resulting collection against a signed policy. The goal is to answer who performed a supply-chain step, what materials and products were involved, and whether the step satisfied policy before an artifact is trusted or deployed.

### Pourquoi les passionnés de paquets s'y intéressent

For package and release engineers, Witness is significant because it turns provenance from a document attached at the end of a release into machine-verifiable metadata emitted by each lifecycle step. It is part of the same tooling vocabulary as SLSA provenance, Sigstore signing, OPA/Rego policy, and SBOM/attestation storage, making it a package-nerd tool for proving how an artifact came to exist.

### Chronologie

- 2021-12-03: the current GitHub repository was created.
- 2024-01: TestifySec donated Witness and Archivista as in-toto subprojects.
- 2025-02-10: in-toto reached CNCF Graduated maturity, strengthening the ecosystem context around Witness.

### Sources

- <https://api.github.com/repos/in-toto/witness>
- <https://github.com/in-toto/witness>
- <https://witness.dev/>
- <https://www.cncf.io/projects/in-toto/>
- <https://www.testifysec.com/opensource/>


## Notes de sécurité

narrow executable package without higher-risk signals.

- **Risque Geiger:** vert / faible
- narrow executable package without higher-risk signals

## Autres enregistrements de gestionnaires de paquets

- Nix - witness: normalized package name match | nixpkgs package indexes: pkgs/by-name/wi/witness/package.nix from https://api.github.com/repos/NixOS/nixpkgs/git/trees/master?recursive=1


## Combined YAML source

View the package source record on GitHub. [combined/witness.yml](https://github.com/mxcl/pkgdb/blob/main/combined/witness.yml)


## Sources

- pkg.so package database
- Geiger risk classifier
- curated package history
- pkgdb category and tag curation
- external package-manager database matches
- cross-ecosystem install command graph