v0.21.0

charmbracelet/crushv0.21.0Dec 4, 2025by github-actions[bot]

AI Summary

This release introduces parallel tool execution for faster task completion, GLM-4.6 model optimizations, and improved system prompts for better cross-model compatibility. It also adds progress bar support for iTerm2 and Rio terminals.

Key Highlights

Parallel tool execution - tools can now run simultaneously for faster task completion
GLM-4.6 model optimizations - series of improvements for users of the GLM model family
Progress bar support for iTerm2 and Rio terminals
System prompt improvements for better cross-model behavior
Added ValidArgs and Args to login command

New Features

Parallel tool execution capability
Progress bar display for iTerm2 and Rio terminals
Improved system prompt tuning
Added ValidArgs and Args to login command
Zai tool call improvements

Full Release Notes

# Parallel tool calls, better GLM, and a hot, new prompt

This a _great_ release with a bunch of nice things. Let's get into it!

## Let’s do everything at the same time

Waiting for stuff sucks. Now Crush can run parallel tool calls to shred through tasks. Let's get to work!

<img src="https://github.com/user-attachments/assets/47dd78ed-7389-460b-96a3-6ac04f228bd2" width="600">

## GLM is short for Great Large Model

There are lots of Crush users using GLM-4.6! We did a series of optimizations in this release to improve the general experience for that family of models. Enjoy and let us know how it works for you.

## Prompt improvements

We tuned the system prompt to work better across models in general. See a model misbehaving? Let us know.

There's more good stuff coming. Stay tuned!

xoxo,
💘 Charm

## Changelog

### New!
* e0bfd35b4d87b0cbfe08e885464be11bd09910a4: feat: allow tools to run in parallel (#1543) (@kujtimiihoxha)
* 2c97eb8a5ba3a25d4ebc703cb2ed154b8c7afd42: feat: show progress bar on iterm2 and rio (@andreynering)

### Fixed
* 7272a90ed5f5036b69acd4e800abab26b3ace67e: fix: add ValidArgs and Args to login cmd (#1540) (@caarlos0)

### Other stuff
* 431d6fb4e380ac0157020d716d6bef51246386b2: chore: bump ultraviolet to fix rendering issues with unnecessary cursor movements and erasing line background color (@aymanbagabas)
* 5c96ab406c57136ac57505e831097daccc4abf93: chore: improve prompt (#1502) (@kujtimiihoxha)
* 54204dab0c6c245e32557ce9227345249d11e241: chore: improve zai tool calls (#1551) (@kujtimiihoxha)
* 8173d58fe538517d176a26cdee91284776fcddbd: ci(labeler): add copilot label (@andreynering)
* 59a4b4759e7f9ca79555047ef26f97659d860938: refactor: use contains any (@andreynering)

---

<details>
<summary>Verifying the artifacts</summary>

First, download the [`checksums.txt` file](https://github.com/charmbracelet/crush/releases/download/v0.21.0/checksums.txt) and the [`checksums.txt.sigstore.json` file](https://github.com/charmbracelet/crush/releases/download/v0.21.0/checksums.txt.sigstore.json) files, for example, with `wget`:

```bash
wget 'https://github.com/charmbracelet/crush/releases/download/v0.21.0/checksums.txt'
wget 'https://github.com/charmbracelet/crush/releases/download/v0.21.0/checksums.txt.sigstore.json'
```

Then, verify it using [`cosign`](https://github.com/sigstore/cosign):

```bash
cosign verify-blob \
  --certificate-identity 'https://github.com/charmbracelet/meta/.github/workflows/goreleaser.yml@refs/heads/main' \
  --certificate-oidc-issuer 'https://token.actions.githubusercontent.com' \
  --bundle 'checksums.txt.sigstore.json' \
  ./checksums.txt
```

If the output is `Verified OK`, you can safely use it to verify the checksums of other artifacts you downloaded from the release using `sha256sum`:

```bash
sha256sum --ignore-missing -c checksums.txt
```

Done! You artifacts are now verified!

</details>

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