# Types > Reference for Splitrail's core data types. Use when working with ConversationMessage, Stats, DailyStats, or other type definitions. Use when this capability is needed. - Skill: `tomevault-io/types` (Agent Skill, multi-file: 2 files) - Install (CLI): `npx skillmds@latest add tomevault-io/types` - Raw SKILL.md: https://api.skillmd.com/api/skills/tomevault-io/types/raw - Safety review: pending - Works with: Claude Code, Claude.ai, OpenAI Codex - Category: Coding & Dev Tools - Author: tomevault-io (https://skillmd.com/u/tomevault-io) - Updated: 2026-09-17 - Page: https://skillmd.com/skills/tomevault-io/types --- # Key Types Read `src/types.rs` for full definitions. ## Core Types - **ConversationMessage** - Normalized message format across all analyzers. Contains application source, timestamp, hashes for deduplication, model info, token/cost stats, and role. - **Stats** - Comprehensive usage metrics for a single message including token counts, costs, file operations, todo tracking, and composition stats by file type. - **DailyStats** - Pre-aggregated stats per date with message counts, conversation counts, model breakdown, and embedded Stats. - **Application** - Enum identifying which AI coding tool a message came from. - **MessageRole** - User or Assistant. ## Hashing Strategy - `local_hash`: Deduplication within a single analyzer - `global_hash`: Deduplication on upload to Splitrail Cloud ## Aggregation Use `crate::utils::aggregate_by_date()` to group messages into daily stats. See `src/utils.rs`. --- > Converted and distributed by [TomeVault](https://tomevault.io/claim/piebald-ai) — claim your Tome and manage your conversions.