Struct OpenHarnessConfig 

pub struct OpenHarnessConfig {
    pub id: String,
    pub display_name: String,
    pub base_url: String,
    pub prompt_cache: PromptCache,
    pub api_key: ApiKey,
    pub disabled_tools: Vec<String>,
    pub instruction_sources: InstructionSources,
    pub global_skill_roots: Vec<PathBuf>,
    pub profile: PromptProfile,
    pub models: Vec<ModelChoice>,
}

Configuration for OpenHarness::custom — named fields rather than a long positional argument list, so a call site reads unambiguously (which string is the id vs the display name). Derives Default, so optional fields can be omitted with ..Default::default().

Fields

id: String

Stable id used in the registry / picker (e.g. "openrouter").

display_name: String

Human-readable name shown in the UI (e.g. "OpenRouter").

base_url: String

Base URL with no trailing slash; chat is {base}/v1/chat/completions.

prompt_cache: PromptCache

Whether requests mark the prompt prefix as cacheable. See PromptCache — needed for Anthropic models reached through a gateway, unnecessary elsewhere.

api_key: ApiKey

Where this endpoint’s key comes from, or that it needs none. See ApiKey: one value, so “needs a key” and “reads this variable” cannot disagree the way three separate fields could.

disabled_tools: Vec<String>

Tool ids to withhold from this agent. Every tool is offered by default; name the ones this host does not want.

A denylist is right here and wrong for environment variables, for the same reason in reverse: tool ids are a closed set this crate owns, so naming one cannot miss a case, while environment names are open-ended and a name-shaped guess always will. See OpenHarness::builtin_tool_names for the set.

Withheld at construction, so a disabled tool never reaches the model — it costs no schema in the request and cannot be attempted. That is different from PermissionRule::deny, which advertises the tool and refuses the call.

instruction_sources: InstructionSources

Where AGENTS.md / CLAUDE.md are read from, and how much of them is kept. Defaults to the working tree only — nothing under $HOME is read until a host asks, via InstructionSources::discover_global or its own paths.

global_skill_roots: Vec<PathBuf>

Per-user skill directories scanned in addition to the project’s. Empty by default; global_skill_roots returns the usual ones for a host that wants them.

profile: PromptProfile

Which prompt and tool surface runs get. PromptProfile::Auto (the default) picks PromptProfile::Compact for a small context window — core tools and plainer instructions, so a small local model has room to work in.

models: Vec<ModelChoice>

Curated models for the picker; may be empty (free-text ids are allowed, or call OpenHarness::with_models_dev for catalog discovery).

Trait Implementations

impl Clone for OpenHarnessConfig

fn clone(&self) -> OpenHarnessConfig

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for OpenHarnessConfig

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for OpenHarnessConfig

fn default() -> OpenHarnessConfig

Returns the “default value” for a type.