Struct ChatTurnInput 

pub struct ChatTurnInput {

    pub session_id: String,
    pub project_id: Option<ProjectId>,
    pub model: String,
    pub model_ref: Option<ProviderModelRef>,
    pub provider: Option<String>,
    pub message: String,
    pub system_prompt: Option<String>,
    pub enhance_prompt: Option<String>,
    pub workspace_path: Option<String>,
    pub default_workspace_path: Option<String>,
    pub selected_skill_ids: Option<Vec<String>>,
    pub workflow_selection: Option<WorkflowSelection>,
    pub orchestration_opt_in: Option<bool>,
    pub copilot_conclusion_with_options_enhancement_enabled: Option<bool>,
    pub data_dir: Option<PathBuf>,
}

Input for the chat turn use case.

Fields

session_id: String

project_id: Option<ProjectId>

Project membership observed and validated by the caller. The authoritative load inside prepare_chat_turn must still match this value before any prompt/workspace/message mutation. For a genuinely new session this becomes its initial stable membership.

model: String

model_ref: Option<ProviderModelRef>

provider: Option<String>

message: String

system_prompt: Option<String>

enhance_prompt: Option<String>

workspace_path: Option<String>

default_workspace_path: Option<String>

Caller-owned live-config default. This is distinct from an explicit request field so an omitted workspace can still prefer the freshly loaded durable session under the transaction lock.

selected_skill_ids: Option<Vec<String>>

workflow_selection: Option<WorkflowSelection>

orchestration_opt_in: Option<bool>

copilot_conclusion_with_options_enhancement_enabled: Option<bool>

data_dir: Option<PathBuf>

Optional data directory for workspace path fallback when neither request nor metadata provides one.