Files
llmx/codex-rs/core/src/plan_tool.rs
Ahmed Ibrahim 097782c775 Move models.rs to protocol (#2595)
Moving models.rs to protocol so we can use them in `Codex` operations
2025-08-22 22:18:54 +00:00

111 lines
3.8 KiB
Rust

use std::collections::BTreeMap;
use std::sync::LazyLock;
use crate::codex::Session;
use crate::openai_tools::JsonSchema;
use crate::openai_tools::OpenAiTool;
use crate::openai_tools::ResponsesApiTool;
use crate::protocol::Event;
use crate::protocol::EventMsg;
use codex_protocol::models::FunctionCallOutputPayload;
use codex_protocol::models::ResponseInputItem;
// Use the canonical plan tool types from the protocol crate to ensure
// type-identity matches events transported via `codex_protocol`.
pub use codex_protocol::plan_tool::PlanItemArg;
pub use codex_protocol::plan_tool::StepStatus;
pub use codex_protocol::plan_tool::UpdatePlanArgs;
// Types for the TODO tool arguments matching codex-vscode/todo-mcp/src/main.rs
pub(crate) static PLAN_TOOL: LazyLock<OpenAiTool> = LazyLock::new(|| {
let mut plan_item_props = BTreeMap::new();
plan_item_props.insert("step".to_string(), JsonSchema::String { description: None });
plan_item_props.insert(
"status".to_string(),
JsonSchema::String {
description: Some("One of: pending, in_progress, completed".to_string()),
},
);
let plan_items_schema = JsonSchema::Array {
description: Some("The list of steps".to_string()),
items: Box::new(JsonSchema::Object {
properties: plan_item_props,
required: Some(vec!["step".to_string(), "status".to_string()]),
additional_properties: Some(false),
}),
};
let mut properties = BTreeMap::new();
properties.insert(
"explanation".to_string(),
JsonSchema::String { description: None },
);
properties.insert("plan".to_string(), plan_items_schema);
OpenAiTool::Function(ResponsesApiTool {
name: "update_plan".to_string(),
description: r#"Updates the task plan.
Provide an optional explanation and a list of plan items, each with a step and status.
At most one step can be in_progress at a time.
"#
.to_string(),
strict: false,
parameters: JsonSchema::Object {
properties,
required: Some(vec!["plan".to_string()]),
additional_properties: Some(false),
},
})
});
/// This function doesn't do anything useful. However, it gives the model a structured way to record its plan that clients can read and render.
/// So it's the _inputs_ to this function that are useful to clients, not the outputs and neither are actually useful for the model other
/// than forcing it to come up and document a plan (TBD how that affects performance).
pub(crate) async fn handle_update_plan(
session: &Session,
arguments: String,
sub_id: String,
call_id: String,
) -> ResponseInputItem {
match parse_update_plan_arguments(arguments, &call_id) {
Ok(args) => {
let output = ResponseInputItem::FunctionCallOutput {
call_id,
output: FunctionCallOutputPayload {
content: "Plan updated".to_string(),
success: Some(true),
},
};
session
.send_event(Event {
id: sub_id.to_string(),
msg: EventMsg::PlanUpdate(args),
})
.await;
output
}
Err(output) => *output,
}
}
fn parse_update_plan_arguments(
arguments: String,
call_id: &str,
) -> Result<UpdatePlanArgs, Box<ResponseInputItem>> {
match serde_json::from_str::<UpdatePlanArgs>(&arguments) {
Ok(args) => Ok(args),
Err(e) => {
let output = ResponseInputItem::FunctionCallOutput {
call_id: call_id.to_string(),
output: FunctionCallOutputPayload {
content: format!("failed to parse function arguments: {e}"),
success: None,
},
};
Err(Box::new(output))
}
}
}