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// Custom Commands System
//
// Commands are user-invocable actions triggered via /slash syntax.
// Two sources:
// 1. System commands — from capabilities, execute through a dedicated handler
// without persisting a chat message
// 2. Skill commands — from skills with user-invocable: true, expand to prompt
//
// Skills marked user-invocable appear in the command palette alongside
// system commands. The UI fetches available commands and renders autocomplete.
use crate::message::Controls;
use crate::user_facing_error::UserFacingErrorFields;
use serde::{Deserialize, Serialize};
#[cfg(feature = "openapi")]
use utoipa::ToSchema;
/// Descriptor for a command available in a session
#[derive(Debug, Clone, Serialize, Deserialize)]
#[cfg_attr(feature = "openapi", derive(ToSchema))]
pub struct CommandDescriptor {
/// Command name (used as /name)
pub name: String,
/// Human-readable description shown in autocomplete
pub description: String,
/// Where this command comes from
pub source: CommandSource,
/// Arguments this command accepts
#[serde(default, skip_serializing_if = "Vec::is_empty")]
pub args: Vec<CommandArg>,
}
/// Where a command originates from
#[derive(Debug, Clone, Serialize, Deserialize, PartialEq, Eq)]
#[cfg_attr(feature = "openapi", derive(ToSchema))]
#[serde(rename_all = "snake_case")]
pub enum CommandSource {
/// Built-in system command from a capability, executed out-of-band from the
/// main chat history. Handlers may call the model or do direct work.
System,
/// From a skill with user-invocable: true (expands to prompt, triggers LLM)
Skill,
}
/// Argument descriptor for a command
#[derive(Debug, Clone, Serialize, Deserialize)]
#[cfg_attr(feature = "openapi", derive(ToSchema))]
pub struct CommandArg {
/// Argument name
pub name: String,
/// Description of the argument
pub description: String,
/// Whether the argument is required
#[serde(default)]
pub required: bool,
}
/// Request payload for executing a system command
#[derive(Debug, Clone, Serialize, Deserialize)]
#[cfg_attr(feature = "openapi", derive(ToSchema))]
pub struct ExecuteCommandRequest {
/// Command name without the leading slash
pub name: String,
/// Raw argument text after the command token
#[serde(default, skip_serializing_if = "Option::is_none")]
pub arguments: Option<String>,
/// Optional per-invocation runtime controls
#[serde(default, skip_serializing_if = "Option::is_none")]
pub controls: Option<Controls>,
}
/// Result of executing a system command
#[derive(Debug, Clone, Serialize, Deserialize)]
#[cfg_attr(feature = "openapi", derive(ToSchema))]
pub struct CommandResult {
/// Whether the command succeeded
pub success: bool,
/// Human-readable message describing the result
pub message: String,
/// Stable error code when `success` is false. Mirrors the codes emitted on
/// chat error messages so the UI can localize the copy.
#[serde(default, skip_serializing_if = "Option::is_none")]
pub error_code: Option<String>,
/// Optional structured fields associated with `error_code` (provider,
/// model_id, retry_after, …).
#[serde(default, skip_serializing_if = "Option::is_none")]
#[cfg_attr(feature = "openapi", schema(value_type = Option<Object>))]
pub error_fields: Option<UserFacingErrorFields>,
}