# spec-kit v0.16.4 — Spec Kit - 0.16.4

- Product: spec-kit (https://whatsnew.fyi/product/spec-kit)
- Vendor: github
- Date: 2026-08-14
- Version: v0.16.4
- Original notes: https://github.com/github/spec-kit/releases/tag/v0.16.4
- Permalink: https://whatsnew.fyi/product/spec-kit/releases/v0.16.4

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

---

- **added** — Add SpecAssay preset to community catalog
- **added** — Add Architecture Governance extension to community catalog
- **added** — Add SpecAssay Check extension to community catalog
- **added** — Add SpecJudge extension to community catalog
- **added** — Add spec-kit-atlas extension to community catalog
- **added** — Add Mistral Vibe integration with Claude parity
- **changed** — Update Intake Authoring Governance preset to v0.3.1
- **changed** — Update Superspec extension to v1.0.2
- **changed** — Update Agent Parity Governance preset to v0.4.2
- **changed** — Harden community submission workflow output allowlists
- **fixed** — Widen task-ID regex to match IDs longer than 3 digits
- **fixed** — Validate non-string step types in workflows
- **fixed** — Dispatch goose commands via `goose run`
- **fixed** — Stop Out-Null swallowing the AVAILABLE_DOCS status lines in PowerShell
- **fixed** — Remove TOCTOU race in RunState.load
- **fixed** — Decode the zipped manifest as UTF-8 before parsing
- **fixed** — Log progress tracker refresh errors instead of silently swallowing them
- **fixed** — Read the authoritative `default_integration` field in bundler, not only its legacy aliases
- **fixed** — Treat exact host patterns literally in auth

##### Install

```bash
uv tool install specify-cli --from git+https://github.com/github/spec-kit.git@v0.16.4
specify init my-project
```

##### What's Changed

- chore: bump version to 0.16.4
- Add SpecAssay preset to community catalog (#4123)
- Update Intake Authoring Governance preset to v0.3.1 (#4121)
- Update Superspec extension to v1.0.2 (#4120)
- fix(taskstoissues): widen task-ID regex to match IDs longer than 3 digits (#4101)
- Add Architecture Governance extension to community catalog (#4122)
- fix(workflows): validate non-string step types (#4111)
- Harden community submission workflow output allowlists (#4103)
- chore(deps): bump github/codeql-action (init + analyze) from 4.37.5 to 4.37.6 (#4114)
- Add SpecAssay Check extension to community catalog (#4113)
- fix(integrations): dispatch goose commands via `goose run` (#2416) (#3781)
- fix(powershell): stop Out-Null swallowing the AVAILABLE_DOCS status lines (#3891)
- fix: remove TOCTOU race in RunState.load (#3839)
- fix: decode the zipped manifest as UTF-8 before parsing (#3958)
- Update Agent Parity Governance preset to v0.4.2 (#4110)
- fix: log progress tracker refresh errors instead of silently swallowing (#3975)
- [extension] Add SpecJudge extension to community catalog (#4079)
- fix(bundler): read the authoritative `default_integration` field, not only its legacy aliases (#3880)
- fix(auth): treat exact host patterns literally (#4108)
- feat: add Mistral Vibe integration with Claude parity (#4075)
- [extension] Add spec-kit-atlas extension to community catalog (#4105)
- chore: release 0.16.3, begin 0.16.4.dev0 development (#4107)