//! Per-agent path resolution for this MCP server. Self-contained (mirrors
//! the sibling helper daemons' own `paths.rs`) so the bin does not link the
//! harness lib just to resolve the agent's state dir. Only the one helper
//! the MCP server needs lives here.

use std::path::PathBuf;

/// Durable state directory for the current agent. Reads `HYPERHIVE_STATE_DIR`
/// first (always set by the meta flake to `/agents/{label}/state`); falls back
/// to the same pattern derived from `HIVE_LABEL` for dev/test environments
/// where the env var may not be set.
#[must_use]
pub fn state_dir() -> PathBuf {
    if let Some(p) = std::env::var_os("HYPERHIVE_STATE_DIR") {
        return PathBuf::from(p);
    }
    let label = std::env::var("HIVE_LABEL").unwrap_or_default();
    PathBuf::from(format!("/agents/{label}/state"))
}