Content
<h1 align="center">Bifrost</h1>
<p align="center">
<a href="https://bifrost.brokk.ai/">
<img src="docs/src/assets/bifrost-social-card.svg" alt="Bifrost — code intelligence for AI, with structural queries and multi-language analysis designed for repository-scale use" width="720">
</a>
</p>
<p align="center">
<a href="https://github.com/BrokkAi/bifrost/releases/latest"><img src="https://img.shields.io/github/v/release/BrokkAi/bifrost" alt="Latest release"></a>
<a href="https://crates.io/crates/brokk-bifrost"><img src="https://img.shields.io/crates/v/brokk-bifrost" alt="crates.io"></a>
<a href="https://pypi.org/project/brokk-bifrost-searchtools/"><img src="https://img.shields.io/pypi/v/brokk-bifrost-searchtools" alt="PyPI"></a>
<a href="https://www.npmjs.com/package/@brokkai/bifrost"><img src="https://img.shields.io/npm/v/%40brokkai%2Fbifrost" alt="npm"></a>
<a href="LICENSE.md"><img src="https://img.shields.io/github/license/BrokkAi/bifrost" alt="Apache-2.0"></a>
</p>
<p align="center">
<a href="#run-your-first-query">Quickstart</a> ·
<a href="https://bifrost.brokk.ai/">Documentation</a> ·
<a href="https://bifrost.brokk.ai/evaluate-bifrost/">Ten-minute evaluation</a> ·
<a href="https://discord.gg/geYkWUeH">Discord</a>
</p>
## Why Bifrost?
`bifrost` is Brokk's Rust-based static analysis toolbox for AI coding harnesses,
editors, and large repositories.
Bifrost gives every supported language a shared intermediate representation, so
the same structural query and navigation workflows work across a mixed-language
repository instead of stopping at language boundaries.
- **One multi-language IR.** Parse unbuilt or partially broken workspaces and
normalize their source structure for cross-language analysis.
- **A real query language.** Use JSON CodeQuery or the Rune Query Language
(RQL) to find language-neutral code shapes and traverse indexed declarations,
references, calls, imports, and type relationships.
- **Built for agents and editors.** Expose structured MCP tools to coding
agents, LSP features to editors, and the same analyzer through the CLI,
Python, and Rust.
- **Designed for active repositories.** Snapshot isolation, incremental updates,
content-based caching, and git/worktree awareness keep analysis responsive as
a repository changes.
See [Choose Bifrost](https://bifrost.brokk.ai/choose-bifrost/) for the
right interface for your workflow, and the [Language and Analysis
Capabilities](https://bifrost.brokk.ai/capabilities/) matrix for
language-by-language support, precision tiers, and current analysis boundaries.
## Run Your First Query
Install the released CLI, clone the small verified evaluation fixture, and run
its saved RQL query:
```bash
curl -fsSL https://raw.githubusercontent.com/BrokkAi/bifrost/refs/heads/master/install.sh | bash
git clone --depth 1 https://github.com/BrokkAi/bifrost.git
cd bifrost/docs/fixtures/ten-minute-evaluation
bifrost --root . --query-file queries/find-audit.rql
```
Users with [uv](https://docs.astral.sh/uv/) or
[pipx](https://pipx.pypa.io/) can instead run `uv tool install brokk-bifrost` or
`pipx install brokk-bifrost`; both install the same native `bifrost` command
from a platform wheel in an isolated environment. `uvx brokk-bifrost --version`
runs it without a persistent install.
Node users can run `npm install -g @brokkai/bifrost` or use
`npx -y @brokkai/bifrost --version`. The npm package installs the same released
native command for the current platform.
The installer downloads the checksum-verified release binary into `~/.local/bin`
on macOS (Apple Silicon and Intel), glibc 2.28+ Linux (x86-64 and ARM64), WSL,
and Android under Termux. Homebrew users on macOS and glibc Linux can run
`brew install brokkai/tap/bifrost` instead. On Windows, use the published
archive or build from source. Musl distributions such as Alpine have no
supported prebuilt release; users can attempt a source build with
`cargo install brokk-bifrost --locked`. See
[Install Bifrost](docs/src/content/docs/install.md) for the full platform
table.
The result identifies the normalized Python call and its exact source location:
```json
{
"isError": false,
"structuredContent": {
"results": [
{
"enclosing_symbol": "src.app.handle",
"end_line": 5,
"kind": "call",
"language": "python",
"path": "src/app.py",
"result_type": "structural_match",
"start_line": 5,
"text": "audit(value)"
}
],
"truncated": false
}
}
```
Continue with the [ten-minute
evaluation](https://bifrost.brokk.ai/evaluate-bifrost/) to run the same
query through the CLI, an MCP-connected coding agent, and VS Code.
## See Bifrost in Action
### Turn Source into a Query in VS Code
<p align="center">
<a href="https://bifrost.brokk.ai/rune-ir/">
<img src="docs/src/assets/bifrost-vscode-query-playground.gif" alt="Selecting Python source in VS Code, inspecting its normalized Rune IR, using the generated starter RQL, and browsing the exact query result" width="900">
</a>
</p>
Select a source construct and run **Bifrost: Show Rune IR** to inspect its
language-neutral `.rune` form and get a conservative starter RQL query. Run that
query from the editor, browse typed results grouped by file, and jump to the
exact source range. The extension also provides definitions, references, hover,
rename, symbols, hierarchy, diagnostics, completion, and other LSP features.
### Use the Same Analyzer from the CLI
<p align="center">
<a href="https://bifrost.brokk.ai/cli/">
<img src="docs/src/assets/bifrost-cli-query.gif" alt="Running a saved RQL query with the Bifrost CLI and receiving an exact structured match" width="900">
</a>
</p>
Run saved RQL or JSON queries directly, or call the same named tools exposed over
MCP for shell scripts and reproducible analysis workflows.
## Language Coverage
Bifrost includes analyzers for C, C++, C#, Go, Java, JavaScript, Kotlin, PHP,
Python, Ruby, Rust, Scala, and TypeScript. See the [capability
matrix](https://bifrost.brokk.ai/capabilities/) for the supported
analysis and precision boundaries in each language.
## Documentation
The public documentation site lives in [`docs/`](docs/) and is published at
[bifrost.brokk.ai](https://bifrost.brokk.ai/).
Useful starting points:
- [Choose the right Bifrost interface](docs/src/content/docs/choose-bifrost.md)
- [Third-party notices](docs/src/content/docs/third-party-notices.md)
- [Install Bifrost](docs/src/content/docs/install.md)
- [Evaluate Bifrost in ten minutes](docs/src/content/docs/evaluate-bifrost.md)
- [MCP server and toolsets](docs/src/content/docs/mcp.md)
- [LSP server](docs/src/content/docs/lsp.md)
- [CLI usage](docs/src/content/docs/cli.md)
- [Code querying](docs/src/content/docs/code-querying.md)
Run the docs site locally with:
```bash
cd docs
npm install
npm run dev
```
GitHub Pages publication is handled by `.github/workflows/docs.yml`. Release tag
builds publish both the latest docs site and a versioned snapshot under
`versions/<tag>/`.
## Repository Layout
The repository is organized around the public product surfaces:
- **Core analysis:** [`crates/`](crates/) contains the Rust workspace crates;
[`src/`](src/) provides the top-level facade and CLI; [`schemas/`](schemas/)
holds shared data contracts.
- **Integrations and distribution:** [`editors/zed/`](editors/zed/) contains the
Zed extension; the VS Code extension is maintained in
[`BrokkAi/bifrost-lsp`](https://github.com/BrokkAi/bifrost-lsp).
[`plugins/`](plugins/) contains coding-agent plugins; [`npm/`](npm/),
[`packaging/`](packaging/), and
[`bifrost_searchtools/`](bifrost_searchtools/) expose or package the analyzer.
- **Documentation and examples:** [`docs/`](docs/) is the documentation site;
[`examples/`](examples/) contains runnable examples.
- **Open analysis content:**
[`BrokkAi/bifrost-packs`](https://github.com/BrokkAi/bifrost-packs) is the home
for open semantic packs and policy rules, including contributions, generation,
and independently versioned releases. The engine retains pack tooling and
existing embedded content during the v0.13.0 transition; [`.bifrost/`](.bifrost/)
contains project-level analysis defaults.
- **Development support:** [`benchmark/`](benchmark/) covers reproducible
measurements; [`scripts/`](scripts/) and [`tools/`](tools/) hold maintenance
and release helpers. Root manifests plus `.github/`, `.cargo/`, and `.config/`
define builds, checks, and automation.
## License and Commercial Use
Bifrost's public open core is licensed under `Apache-2.0` and may be used in
research, internal systems, hosted services, and commercial products. Read the
[License](https://bifrost.brokk.ai/license-use-cases/) page for the project
terms and [Third-Party Notices](https://bifrost.brokk.ai/third-party-notices/)
for the additional terms that apply to official binaries and semantic packs.
## Contributing
<p><strong>Project contributors</strong>
<a href="https://github.com/jbellis"><img src="https://github.com/jbellis.png?size=96" width="40" height="40" alt="@jbellis" title="@jbellis"></a>
<a href="https://github.com/DavidBakerEffendi"><img src="https://github.com/DavidBakerEffendi.png?size=96" width="40" height="40" alt="@DavidBakerEffendi" title="@DavidBakerEffendi"></a>
<a href="https://github.com/foundev"><img src="https://github.com/foundev.png?size=96" width="40" height="40" alt="@foundev" title="@foundev"></a>
<a href="https://github.com/sontek"><img src="https://github.com/sontek.png?size=96" width="40" height="40" alt="@sontek" title="@sontek"></a>
<a href="https://github.com/alexswearingen"><img src="https://github.com/alexswearingen.png?size=96" width="40" height="40" alt="@alexswearingen" title="@alexswearingen"></a>
<a href="https://github.com/joshuadavidthomas"><img src="https://github.com/joshuadavidthomas.png?size=96" width="40" height="40" alt="@joshuadavidthomas" title="@joshuadavidthomas"></a>
</p>
<sub>The public repository is projected from Bifrost's open-core source, so its
GitHub contributor graph does not reflect everyone who helped build the project.</sub>
For local development, test commands, repository-local Python workflow, and
release tagging, see [CONTRIBUTING.md](CONTRIBUTING.md).
Contribute open semantic models and policies to
[`Bifrost-packs`](https://github.com/BrokkAi/bifrost-packs). Engine, parser,
catalog, and policy-evaluation improvements belong here.
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