HELM

HELM is an open-source execution kernel for governed AI tool calling. It sits on the execution boundary, applies fail-closed policy checks before dispatch, records signed receipts for allow and deny decisions, and exports evidence bundles that can be verified offline.

This repository is intentionally scoped to the OSS kernel:

• core/ contains the Go kernel, CLI, HTTP API, proxy, evidence export, and verification logic.
• protocols/, schemas/, and api/openapi/ define the wire contracts and generated SDK inputs.
• sdk/ ships maintained public SDKs for Go, Python, TypeScript, Rust, and Java.
• examples/ contains a small set of runnable integration examples.

Quick Start

brew install mindburnlabs/tap/helm
helm serve --policy ./release.high_risk.v3.toml
helm verify evidence-pack.tar
helm receipts tail --agent agent.titan.exec

helm serve --policy starts the local boundary on 127.0.0.1:7714 by default and stores receipts durably in SQLite unless DATABASE_URL is set. helm verify evidence-pack.tar runs offline by default. Add --online to check embedded pack metadata against the configured public proof API.

Build from source remains supported:

git clone https://github.com/Mindburn-Labs/helm-oss.git
cd helm-oss
make build
./bin/helm serve --policy ./release.high_risk.v3.toml

Run the retained validation targets before publishing changes:

make test
make test-all
make crucible

Govern an existing OpenAI-compatible client:

./bin/helm proxy --upstream https://api.openai.com/v1

Then point your client at http://localhost:8080/v1.

Public Interfaces

The retained public surfaces in this repository are:

• Go CLI and kernel API in core/
• OpenAI-compatible proxy surface
• MCP server and bundle generation commands
• Evidence export and verification commands
• Public SDKs in sdk/go, sdk/python, sdk/ts, sdk/rust, and sdk/java

This repository does not ship hosted control-plane features, private operational tooling, browser UI, static UI, embedded UI, or HTML report surfaces.

SDKs

Language	Path	Install
Go	sdk/go	go get github.com/Mindburn-Labs/helm-oss/sdk/go
Python	sdk/python	pip install helm-sdk
TypeScript	sdk/ts	npm install @mindburn/helm
Rust	sdk/rust	cargo add helm-sdk
Java	sdk/java	com.github.Mindburn-Labs:helm-sdk:0.4.0

The HTTP client/types layer is generated from api/openapi/helm.openapi.yaml. Protobuf message bindings come from protocols/proto/ where a language SDK ships them. Both surfaces are validated by the SDK test targets.

Repository Map

Path	Purpose
core/	Go implementation of the kernel, CLI, HTTP API, proxy, and verification paths
api/openapi/	OpenAPI contract used by the generated SDKs
protocols/	Protocol specifications and schema sources
schemas/	JSON schemas used by the kernel and verification flows
tests/conformance/	Conformance profile, checklist, and verification tests
reference_packs/	Example policy/reference bundles used by tests and examples
deploy/helm-chart/	Helm chart for running the kernel in Kubernetes

Documentation

Public OSS docs are sourced from this repository and canonically published through docs.mindburn.org. The owned docs set for sync is declared in docs/public-docs.manifest.json.

• Quickstart
• Architecture
• Conformance
• Verification
• Publishing
• Compatibility
• SDK Index
• Security Model
• OWASP Mapping

License

Apache-2.0. See LICENSE.