# HELM SDK - Rust
Typed Rust client for the retained HELM kernel API.
## Install
```bash
cargo add helm-sdk
```
Package metadata identifies source target `0.10.1`; verify registry state
before publishing a pinned install claim.
## Local Development
```bash
cargo test
```
## Generated Sources
`src/types_gen.rs` is generated from `api/openapi/helm.openapi.yaml`.
Protobuf bindings under `src/generated/` are generated from
`protocols/proto/`; the `codegen` feature can rebuild them with
`tonic-build`.
## Usage
```rust
use helm_sdk::{ChatCompletionRequest, ChatCompletionRequestMessagesInner, HelmClient, Role};
fn main() -> Result<(), Box<dyn std::error::Error>> {
let client = HelmClient::new("http://127.0.0.1:7714");
let result = client.chat_completions(&ChatCompletionRequest::new(
"gpt-6-sol".to_string(),
vec![ChatCompletionRequestMessagesInner::new(
Role::User,
"hello".to_string(),
)],
))?;
println!("{:?}", result);
Ok(())
}
```
For a protected tenant-scoped route, construct the client with the API key and
explicit server-bound tenant and principal IDs. `HelmClient::new` remains
available for public routes.
```rust
let client = HelmClient::with_auth(
"http://127.0.0.1:7714",
Some("api-key"),
Some("tenant-id"),
Some("principal-id"),
);
```
## Execution Boundary Methods
`HelmClient` includes calls for evidence envelope manifests, boundary records
and checkpoints, conformance vectors, MCP quarantine and authorization
profiles, sandbox profiles and grants, authz snapshots, approvals, budgets,
telemetry export, and coexistence capabilities. `SandboxGrantInspection`
returns either backend profiles or a sealed grant depending on whether a
runtime query is provided.
`evaluate_decision` accepts only `EvaluateRequest`, whose `tool`,
`effect_level`, and `session_id` must be non-blank. The returned value is the
receipt-bearing `EvaluateResponse`.
## Source target
The client uses the canonical typed evaluation contract and receipt-bearing V5
responses. Registry availability remains a post-publication check.