//! Segment persistence via append-only JSONL logs.
//!
//! # Architecture
//!
//! Sessions are recorded as a sequence of [`LogEntry`] values, one per line
//! in a `.jsonl` file. Reading the log and collecting entries reconstructs
//! the full Worker state — no separate snapshots or checkpoints needed.
//!
//! This crate provides free functions for persistence operations.
//! The caller (typically Pod) holds the Worker directly and calls these
//! functions after state-mutating operations.
//!
//! Debug-mode [`TraceEntry`] records capture raw stream events in a separate
//! `.trace.jsonl` file, independent of the segment log.
//!
//! # Quick start
//!
//! ```ignore
//! use session_store::{create_segment, restore, save_delta, FsStore, SegmentStartState};
//!
//! let store = FsStore::new("./sessions")?;
//! let segment_id = create_segment(&store, SegmentStartState {
//!     system_prompt: None,
//!     config: &config,
//!     history: &[],
//! })?;
//! ```

pub mod event_trace;
pub mod fs_store;
pub mod logged_item;
pub mod segment;
pub mod segment_log;
pub mod store;
pub mod system_item;

pub use event_trace::TraceEntry;
pub use fs_store::FsStore;
pub use llm_worker::UsageRecord;
pub use llm_worker::llm_client::types::{ContentPart, Item, Role};
pub use logged_item::{LoggedContentPart, LoggedItem, LoggedRole, from_logged, to_logged};
pub use segment::{
    SegmentStartState, append_entry, append_system_item, classify_history_item,
    create_compacted_segment, create_segment, create_segment_with_id, ensure_head_or_fork, fork,
    fork_at, restore, save_config_changed, save_delta, save_extension, save_pod_scope,
    save_run_completed, save_run_errored, save_turn_end, save_usage, save_user_input,
};
pub use segment_log::{
    LogEntry, POD_SCOPE_EXTENSION_DOMAIN, PodScopeSnapshot, RestoredState, SegmentOrigin,
    collect_state,
};
pub use system_item::{SystemItem, render_pod_event};
pub use store::{Store, StoreError};

/// Segment identifier. UUID v7 (time-ordered, lexicographically sortable).
pub type SegmentId = uuid::Uuid;

/// Generate a new segment ID.
pub fn new_segment_id() -> SegmentId {
    uuid::Uuid::now_v7()
}