harness-rs-core 0.0.1

Core traits and types for the harness-rs agent framework: Model, Tool, Guide, Sensor, Hook, Compactor, Skill, plus Context, World, Block, Event, FixPatch and 27 lifecycle events.
Documentation 
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use async_trait::async_trait;
use serde::{Deserialize, Serialize};
use std::path::{Path, PathBuf};
use std::sync::Arc;

/// Runtime view of the filesystem / repo the agent operates on.
#[derive(Debug, Clone)]
pub struct RepoView {
    pub root: PathBuf,
}

/// Things the agent and its sensors can do that aren't covered by a Tool.
///
/// This is intentionally tiny — most work flows through Tools.
pub struct World {
    pub repo:   RepoView,
    pub runner: Arc<dyn ProcessRunner>,
    pub clock:  Arc<dyn Clock>,
    pub kv:     Arc<dyn KvStore>,
}

#[async_trait]
pub trait ProcessRunner: Send + Sync + 'static {
    async fn exec(&self, program: &str, args: &[&str], cwd: Option<&Path>) -> std::io::Result<ProcessOutput>;
}

#[derive(Debug, Clone, Serialize, Deserialize)]
pub struct ProcessOutput {
    pub status: i32,
    pub stdout: String,
    pub stderr: String,
}

pub trait Clock: Send + Sync + 'static {
    /// Unix milliseconds since epoch.
    fn now_ms(&self) -> i64;
}

#[async_trait]
pub trait KvStore: Send + Sync + 'static {
    async fn get(&self, key: &str) -> Option<Vec<u8>>;
    async fn set(&self, key: &str, value: Vec<u8>);
    async fn delete(&self, key: &str);
}