muthr 0.1.22

A zero-trust orchestrator that automates secure inference and isolated execution of local AI agents.
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use serde_json::{Map, Value};
use std::fs;
use std::path::{Path, PathBuf};

use crate::preset::Preset;

pub fn generate_runtime_config(
    preset: &Preset,
    port: u16,
    mount_point: &Path,
) -> Result<PathBuf, color_eyre::Report> {
    let home = std::env::var("HOME")?;
    let template_path = PathBuf::from(&home).join(".config/muthr/clients/opencode-config.json");

    let content = fs::read_to_string(&template_path)?;
    let primary_slot = preset
        .slots
        .first()
        .ok_or_else(|| color_eyre::eyre::eyre!("No slots found in preset"))?;

    let model_id = format!("01-{}", primary_slot.name);
    let ctx_window = primary_slot.ctx_size.unwrap_or(200000);

    let content = content
        .replace("__CTX_WINDOW__", &ctx_window.to_string())
        .replace("__DEFAULT_MODEL__", &model_id)
        .replace("__LLAMA_PORT__", &port.to_string())
        .replace("__INJECTED_MOUNT_POINT__", &mount_point.to_string_lossy());

    let mut config: Value = serde_json::from_str(&content)?;

    if let Some(obj) = config.as_object_mut() {
        obj.insert(
            "model".to_string(),
            Value::String(format!("llama-cpp/{}", model_id)),
        );
        obj.insert(
            "small_model".to_string(),
            Value::String(format!("llama-cpp/{}", model_id)),
        );

        if let Some(agent) = obj.get_mut("agent").and_then(|a| a.as_object_mut()) {
            for (_name, agent_cfg) in agent.iter_mut() {
                if let Some(agent_obj) = agent_cfg.as_object_mut() {
                    agent_obj.insert(
                        "model".to_string(),
                        Value::String(format!("llama-cpp/{}", model_id)),
                    );
                }
            }
        }

        if let Some(provider) = obj.get_mut("provider").and_then(|p| p.get_mut("llama-cpp")) {
            if let Some(p_obj) = provider.as_object_mut() {
                let mut options = Map::new();
                options.insert(
                    "baseURL".to_string(),
                    Value::String(format!("http://host.lima.internal:{}/v1", port)),
                );
                p_obj.insert("options".to_string(), Value::Object(options));

                let mut models_map = Map::new();
                let mut inner_model = Map::new();
                inner_model.insert("name".to_string(), Value::String(model_id.clone()));
                inner_model.insert("tools".to_string(), Value::Bool(true));
                inner_model.insert(
                    "context_window".to_string(),
                    Value::Number(ctx_window.into()),
                );

                let mut limit_map = Map::new();
                limit_map.insert("context".to_string(), Value::Number(ctx_window.into()));
                limit_map.insert("output".to_string(), Value::Number(8192.into()));
                inner_model.insert("limit".to_string(), Value::Object(limit_map));

                models_map.insert(model_id, Value::Object(inner_model));
                p_obj.insert("models".to_string(), Value::Object(models_map));
            }
        }
    }

    let runtime_dir = PathBuf::from(&home).join(".cache/muthr/opencode_runtimes");
    fs::create_dir_all(&runtime_dir)?;

    let runtime_path = runtime_dir.join(format!("opencode-runtime-{}.json", preset.name));
    fs::write(&runtime_path, serde_json::to_string_pretty(&config)?)?;

    Ok(runtime_path)
}