v1.4.457

yarnpkg/yarnv1.4.457Jul 9, 2026by github-actions[bot]

AI Summary

This release adds support for Anthropic's Claude Sonnet 5 model, including one-million-token context and updated sampling parameters, along with a new ChangeLog backfill flag.

Key Highlights

Added Claude Sonnet 5 to supported Anthropic models
Enabled one-million-token context beta for Claude 5 models
Removed older Claude 4 aliases from model listings
Added `--closed-ok` flag for back-filling ChangeLog entries

Breaking Changes

Removal of older Claude 4 aliases from model listings

New Features

Claude Sonnet 5 support
One-million-token context beta
Centralized Anthropic sampling restrictions
Back-fill ChangeLog generation capability

Full Release Notes

## Changes

### PR [#2155](https://github.com/danielmiessler/Fabric/pull/2155) by [ksylvan](https://github.com/ksylvan): Claude Sonnet 5 Anthropic support

- Add Claude Sonnet 5 to supported Anthropic models
- Enable one-million-token context beta for Claude 5 models
- Omit sampling parameters for Claude Sonnet 5 requests
- Centralize Anthropic sampling restrictions behind prefix matching
- Remove older Claude 4 aliases from model listings

### PR [#2156](https://github.com/danielmiessler/Fabric/pull/2156) by [ksylvan](https://github.com/ksylvan): Make it possible to back-fill missing ChangeLog entries

- Add support for changelog generation for closed pull requests via a new `--closed-ok` flag, bypassing open-state validation.
- Skip mergeability checks when processing closed pull requests to allow smooth back-filling of missing entries.
- Store the closed pull request allowance setting in the generator configuration for consistent behavior.
- Improve error messaging to guide users toward using `--closed-ok` when validation errors occur on closed PRs.
- Introduce the `--closed-ok` flag as the primary mechanism for enabling back-fill workflows on previously closed pull requests.