Struct EngineConfig 

pub struct EngineConfig {

    pub session_id: String,
    pub harness: String,
    pub api_schema: String,
    pub model: String,
    pub cwd: PathBuf,
    pub workspace_root: PathBuf,
    pub max_turns: Option<u32>,
    pub resample_retries: u32,
    pub resample_backoff: Duration,
    pub sampling_args: SamplingArgs,
    pub cache_hint: CacheHint,
    pub streaming: bool,
    pub instructions: InstructionsConfig,
    pub skills: SkillsConfig,
    pub context_window_tokens: Option<u64>,
}

Everything the loop needs that isn’t the provider, registry, preamble, or sink.

Fields

session_id: String

The session identifier (stamped into the report + Init).

harness: String

The harness pack in use, e.g. grok (stamped into the report + Init).

api_schema: String

The wire schema in use, e.g. anthropic/mock (the provider’s api_schema).

model: String

The model id (for Init).

cwd: PathBuf

The working directory handed to each tool call.

workspace_root: PathBuf

The path-jail root (ADR-0008), handed to each ToolCtx.

max_turns: Option<u32>

The max sample→dispatch turns before terminating with MaxTurns (ADR-0005 amendment 2026-07-18). None (the default) = unlimited — every studied harness defaults to no cap (Claude Code’s maxTurns? is enforced only when set; grok’s max_turns: Option<u32> defaults None; codex has no turn cap at all).

resample_retries: u32

Bounded loop-level resample budget on retryable provider errors (ADR-0007).

resample_backoff: Duration

Base backoff between resamples; the nth retry waits base * n. Set to zero in tests to avoid real sleeps.

sampling_args: SamplingArgs

Provider-neutral sampling knobs.

cache_hint: CacheHint

Prompt-cache placement hint for the wire.

streaming: bool

Use the streaming sample path (locode_provider::Provider::stream) instead of locode_provider::Provider::complete (ADR-0021). Default false — the headless one-shot stays non-streaming; the TUI sets this, and headless can opt in via --stream (Anthropic rejects non-streaming requests past ~10 min, so streaming is required for unbounded output). Emits Event::MessageDeltas; the final Message is still appended whole, so the trace can stay whole-message by dropping the deltas (Q1).

instructions: InstructionsConfig

Shared project-instruction loading (AGENTS.md, ADR-0023): discovered from cwd and injected once per session as a User <system-reminder>. Default = enabled.

skills: SkillsConfig

Skill discovery + the injected listing (ADR-0025). Like instructions, this is shared machinery: identical under every --harness, and no pack sees a tool.

context_window_tokens: Option<u64>

The model’s context window in tokens, when known — sizes the listing budget (ADR-0025 §3). None falls back to a fixed char budget.

Trait Implementations

impl Clone for EngineConfig

fn clone(&self) -> EngineConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for EngineConfig

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

Formats the value using the given formatter.

impl Default for EngineConfig

fn default() -> EngineConfig

Returns the “default value” for a type.