v1.6.21

## git-ai v1.6.21

### Release Channel
`latest`

> **Beta:** The Windows MSI and macOS PKG installers are beta.

---

> **Detailed AI-generated changelog is being generated and will appear here shortly...**

---

### Installation
Install this specific version with checksum verification:

**macOS/Linux:**
```bash
curl -fsSL https://github.com/git-ai-project/git-ai/releases/download/v1.6.21/install.sh | bash
```

**Windows (PowerShell):**
```powershell
irm https://github.com/git-ai-project/git-ai/releases/download/v1.6.21/install.ps1 | iex
```

### Downloads
- **Linux (x64)**: `git-ai-linux-x64`
- **Linux (ARM64)**: `git-ai-linux-arm64`
- **Windows (x64)**: `git-ai-windows-x64.exe`
- **Windows (ARM64)**: `git-ai-windows-arm64.exe`
- **Windows MSI (x64)**: `git-ai-windows-x64.msi`
- **Windows MSI (ARM64)**: `git-ai-windows-arm64.msi`
- **macOS (Intel)**: `git-ai-macos-x64`
- **macOS (Apple Silicon)**: `git-ai-macos-arm64`
- **macOS PKG (Intel)**: `git-ai-macos-x64.pkg`
- **macOS PKG (Apple Silicon)**: `git-ai-macos-arm64.pkg`
- **macOS PKG (Universal)**: `git-ai-macos-universal.pkg`

### SHA256 Checksums
```
$(cat release/SHA256SUMS)
```

### Attestation Verification
Verify build provenance with the GitHub CLI:
```bash
gh attestation verify git-ai-<platform> --repo git-ai-project/git-ai
```


<!-- Release notes generated using configuration in .github/release.yml at main -->

## What's Changed
### Other Changes
* [codex] Resolve Codex model from transcript/config fallback by @Dame5211 in https://github.com/git-ai-project/git-ai/pull/1711
* docs: use GitHub Stacks for PR workflow by @svarlamov in https://github.com/git-ai-project/git-ai/pull/2061
* fix(daemon): reuse bounded Tokio runtimes by @svarlamov in https://github.com/git-ai-project/git-ai/pull/2056
* perf(checkpoint): avoid duplicate working-log materialization by @svarlamov in https://github.com/git-ai-project/git-ai/pull/2063
* fix(daemon): cap glibc allocator arena retention by @svarlamov in https://github.com/git-ai-project/git-ai/pull/2064
* perf(daemon): throttle agent_usage emission with an in-memory limiter by @svarlamov in https://github.com/git-ai-project/git-ai/pull/2029
* test(daemon): await idle control connection closure by @svarlamov in https://github.com/git-ai-project/git-ai/pull/2068
* perf(daemon): scope sync.family's trace fence to the requested family by @svarlamov in https://github.com/git-ai-project/git-ai/pull/2030
* build(deps): bump the npm_and_yarn group across 1 directory with 2 updates by @dependabot[bot] in https://github.com/git-ai-project/git-ai/pull/2081
* chore(intellij-plugin): bump org.jetbrains.qodana from 2026.1.3 to 2026.2.0 in /agent-support/intellij by @dependabot[bot] in https://github.com/git-ai-project/git-ai/pull/2082
* chore(intellij-plugin): bump io.sentry.jvm.gradle from 6.15.0 to 6.17.0 in /agent-support/intellij by @dependabot[bot] in https://github.com/git-ai-project/git-ai/pull/2083
* chore(opencode-plugin): bump @opencode-ai/plugin from 1.18.4 to 1.18.11 in /agent-support/opencode by @dependabot[bot] in https://github.com/git-ai-project/git-ai/pull/2084
* chore(vscode-plugin): bump posthog-node from 5.46.0 to 5.47.3 in /agent-support/vscode by @dependabot[bot] in https://github.com/git-ai-project/git-ai/pull/2085
* chore(ci): bump the codeql group with 2 updates by @dependabot[bot] in https://github.com/git-ai-project/git-ai/pull/2086
* chore(ci): bump JetBrains/qodana-action from 2026.1.3 to 2026.2.0 by @dependabot[bot] in https://github.com/git-ai-project/git-ai/pull/2087
* chore(ci): bump actions/setup-java from 5.6.0 to 5.7.0 by @dependabot[bot] in https://github.com/git-ai-project/git-ai/pull/2088
* chore(deps): bump fast-uri from 3.1.4 to 3.1.5 in /agent-support/vscode in the npm_and_yarn group across 1 directory by @dependabot[bot] in https://github.com/git-ai-project/git-ai/pull/2089
* Readme nit re note consistency by @svarlamov in https://github.com/git-ai-project/git-ai/pull/2090

## New Contributors
* @Dame5211 made their first contribution in https://github.com/git-ai-project/git-ai/pull/1711

**Full Changelog**: https://github.com/git-ai-project/git-ai/compare/v1.6.20...v1.6.21